2015/7/4 9:18:04 Wu Fan, Du Yongguo, Wei Ketai, Ma Mingtu and Sheng Fen 207true 3and (Ph₃P)₂PdCl₂. Using anhydrous AlCl₃ as catalyst，the cis-trans PPA is obtained. And using (Ph₃P)₂PdCl₂,the trans-cis PPA is found. Therefore，the polymerization of phenylacetylene may follow complex catalysis mechanism when anhydrous AlCl₃ is used as a catalyst and it may follow metathesis catalysis mechanism when (Ph₃P)₂PdCl₂ is used.]]> 2015/7/4 9:18:04 Li Yinkui, Tong Yiqing and Chen Zhaohui 206true 2015/7/4 9:18:04 Tong Yiqing, Li Yinkui and Chen Zhaohui 205true 2015/7/4 9:18:03 1, Qi Youxun¹, Zhou Shiguang¹ and Wang Xiuhua²]]> Zhou Jiayin¹, Qi Youxun¹, Zhou Shiguang¹ and Wang Xiuhua² 204true 2015/7/4 9:19:34 Ouyang Guoen and Wang Xiaoyuan 203true max and ε max. It has also been found that there is an absorption occuring at 325nm，when the concentration of the copolymer is higher than 0.03g/1 approxiately. The absorbance is related to molecular weight and concentration of the copolymer，while the position is unchanged.]]> 2015/7/4 9:19:23 Lu Yi, Zhang Zhiyi and Tan Zilie 202true cl points. It has been shown that with the help of annealing at the same temperature 1 or 2 hours after the deformation，the carbide grains can be thickened and well-distributed by Ostwald mechanism. At the same time the deformed ferrite matrix can be recrysta11ized as a general rule.]]> 2015/7/4 9:19:23 Wu Fan, Zeng Xiangyun, Bian Bo and Jiang Jixiang 201true 2015/7/4 9:19:24 Liu Xinwei and Ouyang Guoen 200true 2015/7/4 9:20:32 Chen Zhaohui, Zhang Changrui, Feng Chunxiang, Zhang Ling and Liu Chengmin 199true -6℃^-1 and 4.1×10^-6℃^-1 for the first and second thermal cxpansion processes. The thermal expansion performance has been analysed theoretically and the calculated values are approximately in agreement with the experimental data.]]> 2015/7/4 9:20:07 Wan Hong and Yang Deming 198true 2 or NH₃ atmosphere yie1ds Si-N-C and Si-N amorphous ceramics respective1y. The three kinds of ceramics were heat-treated between 1300℃ and 1500℃ in Ar gas to examine their therma1 stabi1ity，the result shows that Si-C ceramic changes from microcrysta1 to β-SiC crystalline and Si-N ceramic from amorphous to a-Si₃N₄，accompained by the observab1e weight loss whi1e Si-N-C ceramic retains its e1ementa1 composition and β-SiC microcrystalline states up to 1500℃.]]> 2015/1/23 11:00:09 Li Qun1i and Song Yongcai 197true 2Mn)，the springs made of the new steel either in case plate section of truck or in round section of railway sleeper appear more comprehensive mechanical properties and implicate higher end product rate and lower consumed power in both rolling and spring-manufacturing processes.]]> 2015/1/23 11:00:09 Wu Fan,Ma Mingtu,Mao Jianwu and Du Yongguo 196true 2015/1/23 11:00:21 Pan Jin,Zhao Xun,Yin Xinfang and Yang Deming 195true 2015/1/23 11:00:21 Liu Fengrong,Su Bo,Wang Xingye and Wu Xiaojin 194true 100m. The effect between structure and properties of SiC fiber made by various technical parameters has been studied in this paper.]]> 2015/1/23 11:00:44 Feng Chunxiang,Liu Xinwei,Yang Yiming,Lu Yi,Song Yongcai and Lei Shaozeng 193true 2015/1/23 11:00:44 Peng Peigen,Zhang Ren,Liu Dehui,Wang Zhenfang and Peng Wangda 192true 2?6H₂O and NiCl₂?6H₂O as template respectively. The composition and structure of cited chelates have been determined by elemental analysis，molar conductance and magnetic susceptibility measurements，IR Spectrophotometry. The electrochromism of the chelates have been observed by uv-visible spectra，the electrochromic mechanism are preliminary investigated.]]> 2015/1/23 11:00:44 Qi Youxun,Sang Lixin,Zhou Jiayin and Zhou Shiguang 191true 2015/1/23 10:59:16 Zhang Hong,Siyong Min and Liu Qingguo 190true 2015/1/23 10:59:30 Ouyang Guoen,Liu Xinwei and Yue Manjun 189true 2014/6/11 0:00:00 Chen Weifang,Ren Bin and Wu Qifen 188true 2014/6/11 15:43:36 Jiang Dazhi,Shen Wei and Wang Xingye 187true 2014/6/11 15:43:22 1 and An Lihua²]]> Fan Zhenxiang¹ and An Lihua² 186true 3 as catalyst. IR spectra of these polymers are presented and conductivity and current versus voltage (I-V) characteristics are determined.]]> 2014/6/11 15:43:22 1,Liu Qingzhi¹,Huang Shan¹,Sun Wei¹,Loug Yongfu¹,Liu Yuming² and Sun Lemin²]]> Li Yinkui¹,Liu Qingzhi¹,Huang Shan¹,Sun Wei¹,Loug Yongfu¹,Liu Yuming² and Sun Lemin² 185true 20₃.Al₂O₃ whisker reinforced magnesiurm composites，analyses their mechanical properties and fracture surfaces. Damping behavior of magnesium composites vary as reinforcers. C(f)/Mg composites exhibit higher damping than whiskers rein-forced magnesium composites. Fiber/matrix interface plays an important role in damping.]]> 2014/6/11 15:43:22 1,Si Yongmin¹,Liu Qingguo¹,Qian Xiaotai² and Song Yongsha²]]> Zhang Hong¹,Si Yongmin¹,Liu Qingguo¹,Qian Xiaotai² and Song Yongsha² 184true 2014/6/11 15:42:49 Li Jie and Yu Kanglun 183true 2)) was prepared by coammonolysis of MeSiHCl₂ and Me（CH₂=CH) SiCl₂. H₂PtCl₆（dehydrated) and dicumyl peroxide (DCP) were found to be effective to catalyse or initialise crosslinking of the silazane oligomer respectively. The crosslinked polymer was pyrolysed in a tube furnace to obtain high yield(over 74%wt)ceramic at 1273K.]]> 2014/5/28 9:49:25 Hu Haifeng,Chen Zhaohui,Feng Chunxiang,Zhang Changrui,Song Yongcai and Fan Zhenxiang 182true 3+ion to the pitting corrosion on LY12CZ aluminium alloy in O.1mol? L^-1 NaCl solution are studied by using coulostatic pertubation method. The results of research show that the process of the pitting induction and the formation of cerium conversion film on aluminium alloy surface have similar electrochemical model. The rate controlling step of the electrochemical corrosionis thei nterface process of passivation layer(or conversion film)and solution. The Ce³⁺ can inhibit the pitting induction and developing process of the alluminium alloy. After the cerium conversion film is formed，the electrical impedance on the surface of aluminium alloy would increase and the anticorrosion will enhance.]]> 2014/5/28 9:49:25 1,Zhou Jiayin² and Zhou shiguang²]]> Wen Jianguo¹,Zhou Jiayin² and Zhou shiguang² 181true 1HNMR.]]> 2014/5/28 9:47:30 Li Yinkui,Sun Wei,Zhong Hui,Huang Shan and Long Yongfu 180true 2O₃ catalyst was prepared for vapor phase hydrogenation of benzene. The catalytic activity was affected by the reaction condition. The catalystic active stability、thermal stability and toxic endurance were all measured. The result showed that it was a good function catalyst.]]> 2014/5/28 9:47:30 1,Fan Zhenxiang¹,Li Yinkui¹,Tang Daihua²,Li Yicheng² and Gong Jian²]]> Long Yongfu¹,Fan Zhenxiang¹,Li Yinkui¹,Tang Daihua²,Li Yicheng² and Gong Jian² 179true 2014/5/28 9:46:38 Liu Xiuying,Deng Jiyong and Feng Chunxiang 178true 2014/5/28 9:46:38 1,Wang Xingye¹,Shen Wei² and Huang Yuying²]]> Jiang Dazhi¹,Wang Xingye¹,Shen Wei² and Huang Yuying² 177true 2014/1/3 16:01:53 Li Yinkui,Li Shibao,Long Yongfu and Zhang Changrui 176true 2014/1/3 0:00:00 1,Li Yinkui¹,Long Yongfu¹,Zhang Changrui¹,Tang Lihui² and Zhao Xinyi²]]> Li Shibao¹,Li Yinkui¹,Long Yongfu¹,Zhang Changrui¹,Tang Lihui² and Zhao Xinyi² 175true 2014/1/3 0:00:00 Yang Guang,Du Yongguo,Bai Shuxin,Long Yan,Hu Junsui and Zhang Jiachun 174true 2O₃) matrix composites prepared by sol-gel method were investigated. The influences of different sols prepared from Al(NO₃)₃ and AlCl₃ hydrolysis, respectively, on the processing and mechanical properties of composites were also studied. Composites I# and II# were prepared from the sols with Al(NO₃)₃ and AlCl₃ as starting material, respectively. The viscosity of the sol Prepared from Al(NO₃)₃ hydrolysis was lower than that from AlCl₃ hydrolysis, so the densification rate of composite I# was faster than that of composite II#. After 13 times of sol infiltration-gelation-pyrolysis, the density and the flexural strength of as-fabricated composite I# reached 1.86g/cm³ and 145.2MPa, respectively, while those of composite II# reached 1.63g/cm³ and 104.1MPa, respectively. SEM observation of all the specimen fracture surfaces showed a large amount of fiber pull-out. It illustrated that the carbon fiber played a role of toughening Al₂O₃.]]> 2014/1/3 16:01:37 Xie Zhengfang,Xiao Jiayu,Chen Zhaohui,Wang Xingye,Zheng Wenwei and Jiang Dazhi 173true 2014/1/3 16:01:37 Fan Zhenxiang,Long Yongfu,Zhou Xuzhang and An Lihua 172true 2O₃ catalyst by the method of TPD, and the dispersion-degree of Ni on the low Ni/Al₂O₃ Catalyst was determined, The result indicated that there were at least two kinds of adsorption centre on the surface of the catalyst, The dispersion degree of Ni was improved, Benzene and cyclohexane were the first order reversible adsorption and desorption process. The energetic distribution of the catalyst is unequal.]]> 2014/1/3 16:01:37 1,Fan Zhenxiang¹,Li Yinkui¹,Tang Daihua² and Gong Jian²]]> Long Yongfu¹,Fan Zhenxiang¹,Li Yinkui¹,Tang Daihua² and Gong Jian² 171true 2 ceramic. From the TiO₂ powder, titanium nitride formed through nitrifying by ammonia at the temperature above 900℃. The processes were intensely studied through thermal analysis, chromotography, scanning electronic microscopy and X-ray diffraction. Emphasis is placed on the chemical reations, the crystalliztion and polyamorphism in the sol-gel process of TiO₂. Thereafter, the dependence of the yield of TiN under the preparatory conditions of TiO₂ is established.]]> 2014/1/3 16:01:06 Zheng Yajie,Lu Yi and Li Xiaodong 170true 3N₄ ceramic matrix composites with Y₂O₃-Al₂O₃ and. Y₂O₃-La₂O₂ sintering additives are made by hot-pressing method in this paper. The results show that the type and composition of sintering additives have obvious effect on the bonding strength and fracture tonghness of the composites, especially at high temperatures.]]> 2014/1/3 16:01:06 Zhou Xingui,Zhang Changrui,Chen Zhaohui and Zhou Anchen 169true 2 aerogels catalysts(M=Cu or Co)are prepared by sol-gel process and supercritical drying. The resulting aerogels are characterized using transmission electron microscopy (TEM), XRD and nitrogen adsorption analysis. Their catalytic behavior for CO oxidation has been studied. The results indicate that Cu-SiO₂ or Co-SiO₂ catalysts have high catalytic activity at 100-400℃.]]> 2013/11/18 15:33:17 Xu Jing,Pan Yi and Li Xia 168true 2013/11/18 15:33:17 Che Renchao,Li Yongqing,Chen Zhaohui,Cheng Haifeng and Yang Fubiao 167true 2013/11/18 15:33:17 Wu Fan,Liu Jian and Hu Junsui 166true 2 and MeOH in xylene are examined by IR and ¹H-NMR. The results indicated that the concentration of each composition can be calculated using the Si-H bond and phenyl group absorption peak as spectrum-band of quantitative analysis through the calibration curve and the scaling method in the IR analytical means, and also it can be established using the normalization method through the analysis of the different chemical shift parton H and a series of quantitative analytic calculations in ¹H-NMR. Both methods are simple and rapid. The results of the two methods are compared.]]> 2013/11/18 15:33:17 Hu Biru,Song Yongcai and Feng Cunxiang 165true 1HNMR. The V-I curve of polymer is also measured.]]> 2013/11/18 0:00:00 1,Long Yongfu¹ and Wang Jianyin²]]> Li Yinkui¹,Long Yongfu¹ and Wang Jianyin² 164true 2013/11/18 15:33:03 Du Yongguo,Yang Guang,Zhang Weijun,Zhang Jiachun and Huang Weixiang 163true 3N₄ as matrix phase, the bending strength of the materials reaches 878.5MPa and the fracture toughness reaches to 11.96 MPam^1/2. The hot-pressed samples structure is characterized by scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) at the same time, the relationship between the structure and the property is discussed.]]> 2013/11/18 15:33:03 1,Zhang Changrui¹,Zhou Anchen¹,Liu Xianming¹,Daming Chen² and Yingguo Pen²]]> Zhou Xingui¹,Zhang Changrui¹,Zhou Anchen¹,Liu Xianming¹,Daming Chen² and Yingguo Pen² 162true 2013/11/18 15:33:02 Wan Hong,Guo Xiang,SI Yongmin,Zhuo Yue,Yang Deming and Fei Xiaoqing 161true 2013/11/18 15:30:32 LI Yihe,FU Shengli,WANG Bengen and WANG Qinghua 160true 2 and Zr, in the preparation of polycarbosilane (PCS) derived ceramics was investigated. The results showed that the inclusion of active fillers could decrease the porosity of the green compacts effectively, increase ceramic yields of PCS by reacting with N₂, free carbon and/or gas volatile of PCS during pyrolysis to produce new compounds. It was found that Al and Cr could restrain the linear shrinkage of the green compact upon pyrolysis. While TiH₂ and Zr could not. The linear shrinkage got higher with increase of the volume ratio of TiH₂/PCS and Zr/PCS. It was also shown that the inclusion of Al and Zr could enhance the three-point bending strength of the resulted ceramics with the strength of 212MPa and 104MPa when the volume ratio of Al/PCS and Zr/PCS were 60% vol, respectively, which were accordingly 3.3 and 1.6 times of that of the resulted ceramic in which active filler was not included. The inclusion of TiH₂ and Cr, however, could not enhance the strength. So Al was thought as the best among the four fillers. The phase compositions of pyrolysis products were analyzed using X-ray diffraction( XRD). Fracture surfaces of specimens after three-point bending tests were examined on the scanning electron microscope(SEM).]]> 2013/11/18 15:30:46 XIE Zhengfang,CHEN Zhaohui,LI Yongqing,ZHENG Wenwei,HU Haifeng and XIAO Jiayu 159true f/SiC composites was investigated. Owing to the poor sinterability as a result of low sintering temperature (l700℃), a very weakly bonded fiber/matrix interface was formed , which gave the composite poor mechanical property. On increasing sintering temperature to l800℃, a carbon-rich interface not only avoided the direct contact of the fibers with the matrix, but also made the fiber/matrix bonding desirable, so the composite achieved excellent mechanical properties. However, the composite sintered at l850℃ or higher temperature showed substantially degraded mechanical properties, which was mainly attributed to the improvement in the fiber/matrix interfacial bonding and deterioration in the properties of the fibers caused by the serious reaction between the fibers and the interphase.]]> 2013/11/18 0:00:00 1,ZHANG Changrui²,ZHOU Xingui²,ZHANG Xinming¹ and ZHOU Anchen²]]> HE Xinbo¹,ZHANG Changrui²,ZHOU Xingui²,ZHANG Xinming¹ and ZHOU Anchen² 158true 2013/11/18 15:30:46 CHEN Yimin,XIE Kai,PAN Yi,XU Jin and YONG Chengang 157true 2013/11/18 15:30:47 DAI Hongyi,WANG Tongquan and XIAO Yabin 156true 3N₄ powders have been pre-treated by shock activating and hot-pressed into Si₃N₄ ceramics. Three kinds of shock pressure, and three different sintering temperatures are used in the experiments, SEM, TEM and X-ray Diffraction have been used to analysis the structure of the Si₃N₄ powders and ceramics. The properties of Si₃N₄ ceramic have been tested. The results show that shock activation give positive action to the densification of Si₃N₄ powder and the increase of properties of the Si₃N₄ ceramics; the ceramic parts shocked under 40 GPa and sintered under 1800℃ have the best properties. The bend strength reaches 1107.2 MPa, at the same time, the fracture toughness reaches 12. 20MPa.m^1/2.]]> 2013/11/18 15:30:58 1,CAI Qingyu² and ZHANG Shuhua³]]> LIU Jingyu¹,CAI Qingyu² and ZHANG Shuhua³ 155true 3: OEt₂ as the raw materials, the poly(p-phenylene borane) (PPB) is synthesized, After PPB is pyrolyzed in high temperature, the product containing 54.4% B₄C. 32% free canbon and 13.6% B₂O₃ is obtained. If the carbon fiber(Cf) is dipped in the solution of PPB and pyrolyzed in high temperature, the Cf coated by B₄C (B₄C-Cf) is obtained, Comparing with raw Cf in same treat conditions, the tempereture of thermal oxidation resistance of B₄C-Cf has increased by 200℃. The δ₆ of Cf/SiC matrix composites made by using B₄C-Cf 1800℃ is improved 10.5% and the KIC is improved 19.4%. At 1850℃, the δ_ь is improved 31.6% and the KIC is improved 5.8%.]]> 2013/11/18 15:32:04 LI Yinkui,LONG Yongfu,LI shibao and ZHANG changrui 154true atm), heat capacity(C_p), evaporating enthalpy (△H_V), enthalpy (△H_f(l)) and entropy (S) are respectively 0.9559, 1.0000, 0.9905, 0.9969,0.9973 and 0.9922. The responding derivation (S) are 4.710, 4.307, 3.793, 0.484, 0.931, 0.585.]]> 2013/11/18 15:32:04 1,TIAN Deyu²,CHEN Gang³,LIU Shushen³ and LI Zhiliang³]]> LIU Jianhong¹,TIAN Deyu²,CHEN Gang³,LIU Shushen³ and LI Zhiliang³ 153true 3)₂NHN]_n as precursor, which is reaction product between (CH₃)₂SiCl₂ and N₂H₄, Si/C/N ultrafine composite powder was synthesized by vapor reaction decomposition. The pyrolysis mechanism and reaction mechanism of gas-phase precursor under H₂, NH₃ atmosphere and the influence of the pyrolysis conditions(pyrolysis temperature, gas flowing rate, H₂/NH₃ ratio) on the morphological characteristics, the composition of the powder were discussed. Nano-powder is amorphous with 16.49%～26.75% Nitrogen, the least particle size about 40 nm.]]> 2013/11/18 15:30:13 PAN Yi,ZHANG Shuhua,XIONG Reyuan and ZHANG Changan 152true 2013/11/18 15:30:13 1,FAN Zhenxiang¹,ZHOU Xuzhang¹,CHEN Guoqiang¹,LIU Mingdeng²,MENG Mianwu² and HUANG Siyu²]]> ZHAN Jianjie¹,FAN Zhenxiang¹,ZHOU Xuzhang¹,CHEN Guoqiang¹,LIU Mingdeng²,MENG Mianwu² and HUANG Siyu² 151true 3 from thermal analysis by chemical absorption-photometry (CAP) and combined thermogravimetry-gas chromatography (TG-GC).The two methods are simple, rapid and exact. A recovery within 100±6% is generally obtained. The applicable range of these methods is compared.]]> 2013/11/18 15:30:13 1 and ZHANG Shijin²]]> DU Tingfa¹ and ZHANG Shijin² 150true 2013/8/21 9:51:31 XUE Jingen,CHU Zengyong,FENG Chunxiang and XU Jiedong 149true 2PtCl₆ PSO/DVB can cure completely. When cured at 120℃ for 6hrs with H₂PtCl₆, the ceramic yield of PSO/DVB, the mass ratio of which is 1∶0.5, is 76%. The viscosity at room temperature of PSO/DVB and the contact angle between PSO/DVB and carbon fiber are 10.5 mPa?s and 34 degree, which make PSO/DVB very good for the preparation of three-dimension-braided fiber reinforced ceramic matrix composites. The XRD results indicate that there are SiO₂ and β-SiC microcrystals in the product pyrolyzed at 1000℃ and 1200℃, which grow markedly above 1200℃. The content of Si, O, C in the product pyrolyzed at 1000℃ is 38.33wt%, 27.33wt%, and 34.34wt%, respectively. Most C existed as free carbon, and the rest randomly mixed with Si, O to form［Si(O,C)₄］which are converted is to［SiO₄］and［SiC₄］above 1200℃.]]> 2013/8/21 9:51:31 MA Qingsong,CHEN Zhaohui,ZHENG Wenwei and HU Haifeng 148true 2013/8/21 9:51:31 DU Tingfa 147true 2013/8/21 9:52:32 LIU Xiaoyuan,HUANG Yun,ZHOU Ningping and LONG Xingwu 146true 2 increase.]]> 2013/8/21 9:52:32 XU Jing,XIE Kai,CHEN Yimin,PAN Yi and YONG Chengang 145true 2013/8/21 9:49:42 WANG Juan and SONG Yongcai 144true 2013/8/21 9:49:42 LIU Rongjun,ZHOU Xingui,ZHANG Changrui and CAO Yingbin 143true 2013/8/21 9:49:42 1,CHEN Zhaohui¹,Liu Weimin²,ZHENG Wenwei¹ and YAO Zhijun¹]]> WANG Jianfang¹,CHEN Zhaohui¹,Liu Weimin²,ZHENG Wenwei¹ and YAO Zhijun¹ 142true 2)_n Br under nitrogen in the supersonic waves. Sodium methoxyide and methanol was solvent.The yield was 94%. The reaction conditions: molar ratio of β-naphthol/H(CH₂)_n Br was 1,condensation of sodium methoxide was 2.0 mol/L,supersonic ratio was 33±2kHz,reaction time was 5h.]]> 2013/8/21 9:49:42 1,CHEN Rong¹,FAN Zhenxiang² and WANG Jing²]]> YANG Xiaohong¹,CHEN Rong¹,FAN Zhenxiang² and WANG Jing² 141true 2O₃nanopowder whose specific surface area and average particle diameter is 189.6m²/g and about 9nm, respectively, is synthesized via sol-gel process using AlCl₃?6H₂O and (CH₂)₆N₄ as starting materials. Active Al₂O₃-SiO₂ composite powder is synthesized via diphasic sol-gel process using SiO₂and Al₂O₃ sol. After having been calcined at 1300℃ for an hour, Al₂O₃-SiO₂ composite powders transforms to mullite.]]> 2013/8/21 0:00:00 MA Qingsong,JIAN Ke,CHEN Zhaohui and ZHENG Wenwei 140true 2013/8/21 9:50:36 WANG Yifei,ZHENG Chunman,Li Xiaodong,FAN Zhenxiang,WANG Jun and CHEN Ge 139true 1HNMR,TIC-MS.]]> 2013/8/21 9:50:52 ZHAN Jianjie,ZHOU Xuzhang,ZOU Lipeng and WU Wenjian 138true 2O:TEOS(mol) is 0.28 and oxalic acid:TEOS(mol) is 0.01, the gel time is shortest. The further study indicates that β-SiC is converted when the catalyzer of the nickel nitrate is mixed in.]]> 2013/8/21 9:50:52 XING Suli,WANG Jun,ZENG Jingcheng and XIAO Jiayu 137true 2013/8/21 9:51:07 WANG Hao,LI Xiaodong,PENG Ping,CHEN Ge and FENG Chunxiang 136true 280℃) PCS fraction via fractional precipitation,and then add 10-30wt% of a lower m.p. fraction to above PCS,thus obtain PCS mixture,then,both have a higher m.p. (>250℃) and a relatively good spinnability.]]> 2013/8/21 9:51:07 CHU Zengyong,LIU Hui,FENG Chunxiang,WANG Yingde,XUE Jingen,SONG Yongcai and ZHOU Zhichun 135true f/mullite) are fabricated via Al₂O₃ Sol-gel and polysiloxane infiltration-pyrolysis technology. The results show that nanometer γ-Al₂O₃ powders can be prepared through sol-gel using AlCl₃·6H₂O and (CH₂)₆N₄ as starting materials. Mullite can be synthesized by co-pyrolysis reaction between polysiloxane and sol-gel derived γ-Al₂O₃ at 1400℃ under N₂. The density, flexural strength, and fracture toughness of 3D-B C_f/mullite composites are 1.784g/cm₃, 282.5MPa and 17.7MPa·m^1/2, respectively. It is the large quantities of pores in composites that result in low density and flexural strength of 3D-B C_f/mullite composites.]]> 2013/6/14 0:00:00 MA Qingsong,CHEN Zhaohui and ZHENG Wenwei 134true 2 thin film as intermetal dielectric (IMD) is imperative for the reduction of interconnect resistance/capacitance(RC), cross talk and power consumption. SiO₂ aerogel film with unique properties such as ultra-low dielectric constant, low density and high thermal stability is one of the most possible candidates as IMD. SiO₂ aerogel films on a silicon wafer have been synthesized via a process of sol-gel, spin coating and supercritical drying. SiO₂ sol is prepared using a two-step procedure with acid/base as catalyst to investigate the effect of different amount of isopropanol(IPA) and NH₄OH on sol viscosity which is important for　spin coating and the microstructure of SiO₂ aerogel film. The optimized viscosity of SiO₂ sol is in the range of 9～15 mPa·s. It is found that the time of viscosity in 9～15 mPa·s becomes longer as IPA increases or NH₄OH decreases.]]> 2013/6/14 0:00:00 WANG Juan,ZHANG Changrui and FENG Jian 133true 2O on the Sol-gel process is studied. And the effect of heat treatment condition on the valence of the films is also discussed.]]> 2013/6/14 9:08:49 XU Jing,LONG Yongfu,XIE Kai and MAO Xianhe 132true 5crystal appears after annealed at 500℃ in vacuum. As for the magnetic properties, the coercive force (H_c) of as-deposited film decreases with the increase of the thickness of the film. The reason why the annealing treatment leads to the decreases of H_c and saturated magnetic field, and the improvement of the initial magnetic susceptibility and saturated magnetization obviously is the reduction of the microstructure defection and the composition undulation during the treatment.]]> 2013/6/14 9:08:39 QIU Yi,WAN Hong,LIU Jiyan,SI Yongmin and ZHAO Xun 131true 1HNMR.]]> 2013/6/14 9:08:39 ZHANG XueAo,LONG YongFu,XU Jing,XIE Kai and AN LiHua 130true 4∶H₂O∶EtOH∶HCl=6∶3∶4∶1. The latex spheres were removed by calcinations. Set the temperature program as follows: ramp the temperature at 2℃/min from the room temperature to 300℃, maintain it at 300℃ for 2 hours, ramp the temperature at 2℃/min from 300℃ to 550℃, maintain it at 550℃ for 10 hours, ramp the temperature at 10℃/min from 550℃ to the room temperature.]]> 2013/6/14 9:08:25 LONG Yongfu,XU Jing,ZHANG Xueao,XIE Kai and XIAO Jiayu 129true 2 were studied.Its micro-structure of its were illustrated by SEM microphotographs. Finally, a smart plastic Li-ion battery was assembled using the separator.]]> 2013/6/14 9:08:13 LI Dezhan,PAN Yi,XIE Kai and LIU Ling 128true 2013/6/14 9:08:13 WANG Song and CHEN Yimin 127true 2013/6/14 9:08:02 ZHANG Guangying and ZENG Xinwu 126true f/SiC materials and improve the interface between carbon fiber and SiC matrix. The flexural strength of C_f/SiC materials reachs 556.7MPa.]]> 2013/6/14 9:08:02 JIAN Ke,CHEN Zhaohui,MA Qingsong and Zheng Wenwei 125true 2013/6/14 9:08:02 XUE Jingen,SONG Yongcai,LAN Xinyan and WANG Yingde 124true 2013/6/14 9:08:02 CHEN Manhua and CHEN Zhaohui 123true 2013/5/8 10:45:33 1,LAN Xinyan¹,WANG Lu^1,2,XUE Jingen¹ and JIANG Yonggang¹]]> WANG Yingde¹,LAN Xinyan¹,WANG Lu^1,2,XUE Jingen¹ and JIANG Yonggang¹ 122true f/Si-O-C composites are studied and discussed.The high properties are mainly attributed to the ideal interfacial structure.]]> 2013/5/3 9:19:52 FAN Zhenxiang,CHENG Haifeng,ZHANG Changrui and TANG Gengping 121true 2013/4/27 3:07:22 ZOU Shiqin,ZHANG Changrui,ZHOU Xingui,CAO Yinbin and ZHOU Changcheng 120true 2013/4/27 3:07:23 CHENG Xiangzhen,SONG Yongcai,XIE Zhengfang and XIAO Jiayu 119true 2013/4/27 3:07:23 XUE Jingen,XIAO Jiayu,WANG Yingde and LAN Xinyan 118true 2 were prepared by polymerization PAPI with polyether polyol. SEM was employed to observe the structures of SiO₂ filled polyurethane foam and showed that nano SiO₂ particles had been dispersed uniformly in foam. Results of mechanic test show that nano SiO₂ particles in low loading fraction can increase the compressed strength and impact strength of the rigid polyurethane foam. But the addition of nano SiO₂ conduces to the rapid accretion of viscosity of PAPI, which makes the foam reaction difficult to set in and the impact strength decreases with the addition of 7% nano SiO₂.]]> 2013/4/27 3:07:23 1,GAO Si¹,WANG Yifei¹,WANG Ping¹,WANG Jianhua² and LIU Yonghua²]]> WANG Jun¹,GAO Si¹,WANG Yifei¹,WANG Ping¹,WANG Jianhua² and LIU Yonghua² 117true 2 substrate by using vacuum evaporation. The atomic force microscope was applied to survey the surface morphology of the films. The results show that the films are composite of nano-particles of InSb. From the analysis of the scanning images of these samples, the result of the experiment proves that by changing the plating time, different sizes of InSb particle can be formed.]]> 2013/4/22 0:00:00 HE Yanlan,SUN Quan and LU Zhihui 116true 2013/4/22 0:00:00 XU Yongping,CHENG Haifeng,CHEN Zhaohui and TANG Gengping 115true 2013/4/22 10:35:29 WANG Yifei,FAN Zhenxiang,LI Xiaodong,WANG Jun and LEI Shaozeng 114true 2NH］_n, with a number average molecular weight of 106 and a weight average molecular weight of 178. The cured precursor polymer was converted into brown ceramic powder after pyrolysis at 1000℃ in nitrogen atmosphere, and the ceramic yield was 78wt%. X-ray patterns showed that the main phases of the polymer-derived ceramic product at 1400℃ in nitrogen atmosphere were α-Si₃N₄ and some free silicon, and the empirical chemical formula for the product was SiN_1.036O_0.060C_0.028 by elemental analysis. After further treatment at 1600℃ in nitrogen atmosphere, extremely weak diffraction peaks for free silicon and intense peaks for α-Si₃N₄ were observed by XRD patterns, however, there was no phase transition from α-Si₃N₄to β-Si₃N₄all along.]]> 2013/4/10 0:00:00 QI Gongjin,ZHANG Changrui,HU Haifeng,CAO Feng,WANG Siqing and JIANG Yonggang 113true -1mg/L to 3.1×10^-2mg/L. The improved method has wide linear range and high reproducibility.]]> 2013/4/10 0:00:00 MAN Yahui,WU Wenjian,ZHANG Xueao,LIU Changli,HU Biru and WANG Jianfang 112true 2013/4/10 0:00:00 YANG Fubiao,XIAO Jiayu,ZENG Jingcheng,JIANG Dazhi,XING Suli and WANG Zun 111true 2013/4/8 11:10:35 ZOU Shiqin,ZHANG Changrui,ZHOU Xingui and CAO Yinbin 110true -3S?cm^-1.]]> 2013/4/8 11:10:35 WANG Qinghua,WANG Bengen,XU Yan and LIU Hongyu 109true 2013/4/8 11:10:21 WANG Ge,LI Xiaodong,ZENG Jingcheng,LI Gongyi and TANG Yun 108true 3)3·9H₂O, Ni(NO₃)2·6H₂O, Zn(NO₃)2·6H₂O, citrate acid and ammonia as raw materials. The thermal decomposition behavior of dried gel and crystallite size of synthesized powders were studied by using TG-DTA and XRD. Moreover, the relationship of ferrite composition on electromagnetic properties were investigated by network analyzer. The results reveal that the imaginary part of permeability of synthesized powders decreases with frequency and the content of Zn in the Ni-Zn ferrite powder.]]> 2013/4/8 11:10:21 LIU Jun,WANG Yingde and MA Yan 107true 1/2 ,which are much higher than those of PSZC. The composites can be machined by dental CAD/CAM system to manufacture dental restoration.]]> 2013/4/8 11:10:21 1,CHEN Zhaohui¹,WANG Zhongyi²,HU Haifeng¹,TANG Lihui² and ZHENG Wenwei¹]]> LI Shibao¹,CHEN Zhaohui¹,WANG Zhongyi²,HU Haifeng¹,TANG Lihui² and ZHENG Wenwei¹ 106true 4OH amount increased, SiO₂ sol viscosity increased and spin speed reduced. The films' dielectric constant loweres as NH₄OH amount and SiO₂ sol viscosity increases while IPA amount and spinning speed has little effect on the films' dielectric constant.]]> 2013/4/8 11:09:48 WANG Juan,ZHANG Changrui and FENG Jian 105true f/Si-O-C) ceramic composites were fabricated via precursor infiltration and pyrolysis using polysiloxane. The effects of the inert fillers (IF) SiC, SiO₂and SiO₂cenosphere on flexural strength, density, coefficient of heat conductivity of SiC_f/Si-O-C composites were studied. Microstructure analysis shows that the properties are mainly influenced by the inner fillers due to the interface structure and the relative density.]]> 2013/4/8 11:09:48 FAN Zhenxiang,CHENG Haifeng,ZHANG Changrui,TANG Gengping,CHU Zengyong and WANG jun 104true 2H₅OH∶ PDEOS∶HF∶H₂O=20∶10∶3∶0.5, was modified by methyltriethoxysilane(MTES) and washed with alcohol and n-hexane. The obtained gel was then dried under ambient pressure to prepare hydrophobic SiO₂ aerogel. It is shown that hydrophobic SiO₂ aerogels can be obtained when the mass ratio of MTES/ PDEOS is higher than 1.2. The contact angle between hydrophobic SiO₂ aerogels and water is larger than 110°, the densities and specific surface areas of hydrophobic SiO₂ aerogels are in the range of 125～160kg/m³ and 560～900m²/g respectively.]]> 2013/3/25 0:00:00 CHEN Yimin,XIE Kai,HONG Xiaobin and XIAO Jiayu 103true 2013/3/25 4:57:33 1,HU Yun¹ and SONG wei²]]> PAN Yi¹,HU Yun¹ and SONG wei² 102true 4and SiC₃H structure units containing Si-CH₃, Si-CH₂-Si, and Si-H groups. Elemental analysis provides an empirical formula of SiC_1.87 H_7.13O_0.03. Compared with the PCS with close softening point synthesized at normal pressure, the PCS synthesized in the autoclave has a approximate elemental composition, higher Si-H bond content, higher molecular weight, but lower ratio of SiC3H and SiC₄.]]> 2013/3/25 4:57:35 CHENG Xiangzhen,XIAO Jiayu,XIE Zhengfang,SONG Yongcai and WANG Yingde 101true 2013/3/25 4:57:36 WANG Yifei,FAN Zhenxiang,WANG jun,LI Xiaodong and LEI Shaozeng 100true w:2000), butanedioic anydride 4-Aminoacetophenone, 5-acetyl-2-aminobenzophenone. The structures of PPQ-b-PEG are characterized by IR, ¹HNMR. And thermostabilities are studied.The results show that the first decompostion temperature of PPQ-b-PEG is 250℃.The weight of PPQ-b-PEG is reduced by 5% at 250～400℃. It is reduced rapidly at 400～600 ℃.]]> 2013/3/25 4:48:18 LONG Yongfu,XIE Kai,XU Jing,ZHANG Xueao and XIAO Jiayu 99true 2013/3/25 4:48:20 XU Jing,XIE Kai,LONG Yongfu and XIAO Jiayu 98true 2013/3/25 4:48:21 ZHENG Chunman,LI Xiaodong,CHU Zengyong and FENG Chunxiang 97true f/epoxy composite tubes under axial loading. The tubes are fabricated by the flexible expandable mould process. Analysis results show that asymmetry plies increase the hoop interlaminar shearing stresses by 0.43～1.14 times，but no effects on axial interlaminar stresses. The ratio of axial plies to hoop plies plays an important role on the hoop and axial interlaminar shearing stresses, which the stresses reach to a minimum when it's withn the range of 7∶3～4∶1.]]> 2013/3/25 4:48:22 PENG Chaoyi,ZENG Jingcheng,XIAO Jiayu and DU Gang 96true 2013/3/25 4:48:23 ZHANG Yudi,ZHANG Changrui,ZHOU Xingui,CAO Yingbin and LI Junsheng 95true 3) and of good mechanical properties (flexural strength 173MPa，toughness 12.53GPa).]]> 2013/3/25 4:48:28 CAO Yi,CHENG Haifeng,ZHOU Yongjiang,LI Yongqing and CAI Hongnian 94true 2013/3/14 10:39:53 XU Songlin,YANG Shiqing,ZHANG Wei and ZHANG Xinggao 93true 2013/3/14 0:00:00 CHENG Xiangzhen,XIE Zhengfang,SONG Yongcai and XIAO Jiayu 92true 2013/3/14 10:39:53 XUE Jingen,WANG Yingde,SONG Yongcai and QIN Molin 91true 2013/3/14 0:00:00 XIE Zhengfang,CHENG Xiangzhen,SONG Yongcai and XIAO Jiayu 90true f/Si-O-C) composites were fabricated with cheap polysiloxane (PSO) and divinylbenzene (DVB) as precursors and carbon fiber cloth as reinforcements. The mechanical properties of 2D C_f/Si-O-C composites with polysiloxane as precursors were investigated and the difference of properties and cost between them and 2D C_f/SiC composites were also studied in the paper. The results show that the mechanical properties of 2D C_f/Si-O-C are decreased and the cost of them reduced greatly. The flexural strength, fracture toughness and shear strength reach 157.9MPa, 8.4MPa?m^1/2 and 23.4MPa respectively. Such mechanical properties can be reserved up to 1400℃.]]> 2013/3/14 10:39:11 1,CHEN Zhaohui² and JIAN Ke²]]> LIU Jingyu¹,CHEN Zhaohui² and JIAN Ke² 89true 2013/3/14 0:00:00 ZHOU Hao,ZHANG Changrui,CAO Yingbin and ZHOU Xingui 88true 2013/3/14 10:38:48 1,LI Xiaodong¹,LIU Donghua² and LIU Keliang³]]> WANG Xiaojie¹,LI Xiaodong¹,LIU Donghua² and LIU Keliang³ 87true 2013/3/14 0:00:00 XING Suli,WANG Zun,ZENG Jingcheng,XIAO Jiayu,YANG Fubiao and QIU Qiuyuan 86true 2013/3/14 10:38:33 XUE Jingen,WANG Yingde,SONG Yongcai and QIN Molin 85true 2013/3/14 0:00:00 XIE Zhengfang,CHENG Xiangzhen,SONG Yongcai and XIAO Jiayu 84true 3N₄matrix ceramics which would be applied to super-high Mach number missile radome was prepared via the reaction sintering process. Si, BN and SiO₂ powder were the main raw materials. The effects of the raw materials and the model processing parameters and the compact density on properties of the material were investigated. The experimental results showed that the material has the best mechanical properties (σ_b, K_ICis 96.7MPa, 1.80MPa.m^1/2, respectively) and better dielectric and thermal physic properties when the content (in raw mixture powder) of Si, BN, SiO₂, is 55%, 30% and 10%, respectively.]]> 2013/3/14 0:00:00 WANG Siqing,ZHANG Changrui,WANG Shenwei,QI Gongjin,CAO Feng,HU Haifeng and Jiang Yonggang 83true 3 bond broke and formed free radicals through the agency of cyclohexene radical while being heated up, and then formed the structure of Si-CH₂-Si, resulting in cross-linking between PCS molecules.]]> 2013/3/25 0:00:00 MAO Xianhe,SONG Yongcai and LI Wei 82true 1/2, whereas T300 C/SiC composite had low strength and high brittleness, with its flexural strength and fracture toughness were less than one fourth of those of JC2# C/SiC composite. It was found that the fundamental factor to the poor mechanical properties of T300 C/SiC composite was the severe degradation of the fiber during PCS pyrolysis; the other important one was attributed to the strong interfacial bonding between the fiber and agent in the composite.]]> 2013/3/25 4:43:36 WANG Song,CHEN Zhaohui,LI Fan and MA Qingsong 81true 2013/2/28 5:09:21 LI Bin,ZHANG Changrui,CAO Feng,WANG Siqing,CAO Yingbin and GAO Qingfu 80true 2013/2/28 5:09:21 SHEN Zhiqiang,JIANG Zhigang,ZENG Shouyi and Tan Qinghua 79true 2013/2/28 5:09:08 HONG Xiaobin,XIE Kai and XIAO Jiayu 78true 2f/Si₃N₄-BN） were prepared through repeated infiltration and pyrolysis. The ablation performance of the composites was evaluated by arc jet. The ablation surface and microstructures were studied by scanning electron microscope (SEM) and Energy dispersive spectroscopy (EDS). The results 　show that the 3D SiO₂f/Si₃N₄-BN composites have a low linear ablation rate of 0.91mm/s under high pressure and heat flux. Silica fibers fused and more heat was absorbed before the fused layer was swept off and the matrix eroding velocity reduced for the protective melt layer. On the other hand, the fused layer was prevented from eroding from the ablation surface as a result of the matrix with high mechanical property and sublimation temperature. The nitride composite is a high-temperature ablation resistance material for its low recession rate under high thermal load.]]> 2013/2/28 5:08:53 JIANG Yonggang,ZHANG Changrui,CAO Feng,WANG Siqing,HU Haifeng and QI Gongjin 77true f/Si-O-C) composites were fabricated with Silicone Resin (SR) as precursors, ethanol as solvent and SiC powder as inert fillers by precursor infiltration and pyrolysis. The effects of the pyrolysis temperature on the microstructure and mechanical properties of 2D C_f/Si-O-C composites were investigated. The results show that the temperature of first cycle has great effect on the mechanical properties of 2D C_f/Si-O-C. The better mechanical properties are attributed to weakening of the fiber/matrix interfacial bonding. When the sixth pyrolysis is carried out at appropriate temperature, the mechanical properties of 2D C_f/Si-O-C composites are enhanced greatly. The flexural strength and fracture toughness of the composites are 263.9MPa and 12.8 MPa?m^1/2, respectively.]]> 2013/2/28 5:08:53 1,2,CHEN Zhaohui²,JIAN Ke²,MA Qingsong² and WANG Song²]]> LIU Jingyu^1,2,CHEN Zhaohui²,JIAN Ke²,MA Qingsong² and WANG Song² 76true m, where, da/dN is the propagation rate of the crack and can be measured at specific fatigue cycles experimentally, is an amplitude of the stress intensity factor at the crack tip during a fatigue cycle, and can be obtained by FEM, was used. Results show that the Paris' parameters for the plate bonded one-sidedly with carbon fiber reinforced epoxy composite patches are C =6.76×10^-10and m =2.27, respectively, while for glass fiber reinforced epoxy composite patches, C =7.89×10^-10and m =2.33, respectively.]]> 2013/2/28 5:08:40 YANG Fubiao,XIAO Jiayu,JIANG Dazhi and ZENG Jingcheng 75true 4exp(- 4764.65/T)(1-α)^0.861, and the curing procedure is then determined as 100℃ for 30min, and then 120℃ for 30min. The degree of curing reaction of the casting bodies of the hybrid epoxy resin reaches 95.7%, and tensile strength and flexure strength of the casting body are 62.71MPa and 97.92MPa, respectively.]]> 2013/2/28 5:08:40 DAI Xiaoqing,ZENG Jingcheng,LIU Jun and XIAO Jiayu 74true f/Si-O-C composites have fairly excellent properties. The microstructure and properties of SiC_f/Si-O-C composites were analyzed. It has been found that interface structure changes were mainly attributed to the reduction of mass and flexural strength properties.]]> 2013/2/28 5:08:40 TANG Gengping,CHENG Haifeng,FAN Zhenxiang,WANGJun and CHU Zengyong 73true 2013/2/28 5:08:27 ZHANG Duo and LU Fangyun 72true 2013/2/28 5:08:27 1 and ZENG Xinwu²]]> CUI Weifeng¹ and ZENG Xinwu² 71true 4C powders. Then Porous skeleton was loaded with silica-sols prepared by tetraethyloxylane(TEOS), deionized water and ethanol. Silica-aerogels loading chopped mullite fiber porous skeleton was achieved by supercritical drying. Via thermogravimetry(TG), differential thermal analysis(DTA) and energy dispersive spectrometry(EDS), it was revealed that at 700℃～900℃, B₄C was oxidized into B₂O₃ which bound chopped fibers. Furthermore, chopped mullite fiber porous skeleton was chemically stable below 1500℃. Insulation tiles possessed nanoporous structure since silica-aerogels filled microporous pores of chopped mullite fiber skeleton. Thus thermal conductivity of insulation tiles was reduced by 44.3%, 33.8%, 34.6%, 29.5% at 300℃, 500℃, 800℃ and 1000℃ respectively. Besides, the loading of silica-aerogels improved flexural strength and compressive strength of porous skeleton at 50% and 40%, respectively.]]> 2012/12/7 2:58:05 WANG Yanfei,ZHANG Changrui,FENG Jian and JIANG Yonggang 70true 2012/12/7 2:58:05 1,2,XIAO Jiayu²,JIANG Dazhi² and XING Suli²]]> QIU Qiuyuan^1,2,XIAO Jiayu²,JIANG Dazhi² and XING Suli² 69true 2012/12/7 2:58:05 YANG Shiqing,XU Songlin and ZHANG Tong 68true 2013/3/11 3:01:22 LIU Zhuofeng,XIAO Jiayu,ZENG Jingcheng,JIANG Dazhi and LIU Jun 67true -1and 0.032mm(s^-1 , respectively. Quartz/benzoxazine resin composites can be used as ablative materials and fabricated by RTM process.]]> 2013/3/11 3:01:22 YIN Changping,XIAO Jiayu,LI Jianwei,LIU Jun,ZENG Jingcheng and JIANG Dazhi 66true 2013/3/11 3:01:22 1,2,CHENG Haifeng¹,CHEN Zhaohui¹,CHU Zengyong¹,ZHENG Wenwei¹ and WANG Qian¹]]> MEN Jinfeng^1,2,CHENG Haifeng¹,CHEN Zhaohui¹,CHU Zengyong¹,ZHENG Wenwei¹ and WANG Qian¹ 65true 2013/3/11 3:01:22 ZHANG Chaoyang,CHENG Haifeng,CHEN Zhaohui,ZHENG Wenwei and Cao Yi 64true 2012/12/7 0:00:00 GAO Qingfu,ZHANG Changrui,FENG Jian,WU Wei and FENG Junzong 63true 2012/12/7 2:57:37 MENG Xianggui,CHEN Dixiang and PAN Mengchun 62true 29Si CP/MAS NMR, GPC, and UV. It is soluble in the common organic solvent; the UV absorption maximum wavelength is 330nm. The property of pyrolysis shows that its ceramic yield is 80% and it is a potential preceramic polymer. This polymer shows good semiconductive properties, whose intrinsic conductivities are within the range of 10^-8～10^-7S/cm, and can be increased above 10^-5S/cm after being doped with iodine.]]> 2012/12/7 2:57:23 XING Xin,LIU Lin,LI Xiaodong and WANG Haizhe 61true 2012/12/7 2:57:07 1,CAI Hongnian^1,2,CHENG Haifeng¹,ZHENG Wenwei¹ and ZHANG Chaoyang¹]]> CAO Yi¹,CAI Hongnian^1,2,CHENG Haifeng¹,ZHENG Wenwei¹ and ZHANG Chaoyang¹ 60true 2012/12/7 2:57:07 1,ZHOU Xingui¹,HUANG Boyun²,YANG Jiangao³ and HUANG Zelan³]]> YU Haijiao¹,ZHOU Xingui¹,HUANG Boyun²,YANG Jiangao³ and HUANG Zelan³ 59true 2012/12/7 2:57:07 1 and HE Bin²]]> CHEN Yimin¹ and HE Bin² 58true f/SiC) composites were hereby prepared at 600℃ through precursor infiltration and pyrolysis (PIP), and polycarbosilane (PCS) acted as precursor, carbon fiber as enhanced fiber. The results show that bending strength of 3D-C_f/SiC composites are 193.69MPa, room tensile strength 197.69MPa, high temperature(600℃) tensile strength 167.33MPa. Noticeably, the density of 3D-C_f/SiC composites is just only 1.27g/cm³. Furthermore, the fracture surface and microstructure were analyzed and discussed too.]]> 2012/12/7 2:57:07 ZHOU Changcheng,ZHANG Changrui,HU Haifeng,ZHANG Yudi and WANG Zhiyi 57true 2012/11/8 3:50:45 1,2,YU Qifeng²,YANG Yueneng² and ZENG Shouyi¹]]> CHEN Bin^1,2,YU Qifeng²,YANG Yueneng² and ZENG Shouyi¹ 56true 2012/11/8 3:50:45 1,2,WANG Haizhe¹,HU Tianjiao¹ and LI Xiaodong¹]]> ZHAO Dafang^1,2,WANG Haizhe¹,HU Tianjiao¹ and LI Xiaodong¹ 55true 2012/11/8 3:52:03 DAI Mengyan,HU Biru and WU Wenjian 54true 2012/11/8 3:52:01 DAI Xiaoqing,XIAO Jiayu,ZENG Jingcheng,JIANG Dazhi and BIAN Liping 53true f/Si-O-C) composites with low cost silicon resin as precursors and 3D C_f as reinforcement. Effects of adding SiC powder(SiCp) on the structure, mechanical properties and anti-oxidation properties of 3D C_f/Si-O-C composites were investigated. The results showed that adding SiCP filler could reduce the porosity and improve the interface bonding, therefore increase the properties of composites. But when the content was excessive, it was difficult to dense the matrix of composites at the further cycles and pores existed in the matrix. As a result, the mechanical properties of the composites decreased. It was found that when fabricated with 18.2 weight percent SiCp, the composites exhibited the highest mechanical properties, and the flexural strength and fracture toughness reached 421.3MPa and 13.0 MPa·m^1/2, respectively. Meanwhile, the anti-oxidation properties were improved with the increase of the SiCp content. When fabricated with 25.0 weight percent SiCp, the composites exhibited best oxidation resistance properties, and the composites retained 89.5% of original flexural strength.]]> 2012/11/8 3:52:18 1,2,CHEN Zhaohui¹,JIAN Ke¹,FANG Zhiwei² and PENG Xiahui²]]> LIU Jingyu^1,2,CHEN Zhaohui¹,JIAN Ke¹,FANG Zhiwei² and PENG Xiahui² 52true 2O₃+CaF₂) were more efficient for the densification of CNTs/AlN ceramics than sintering aids (YF₃+CaF₂). As the contents of sintering aids (Y₂O₃+CaF₂) increased, the density of CNTs/AlN ceramics improved, while the properties of mechanics and thermal-conductivity decreased.]]> 2012/11/8 3:52:18 WANG Honglei,ZHOU Xingui,YU Haijiao,ZHAO Shuang and LUO Zheng 51true 2012/11/8 3:52:32 1,XU Wenming¹,JIANG Zhigang¹ and MENG Shangyang²]]> YUAN Duancai¹,XU Wenming¹,JIANG Zhigang¹ and MENG Shangyang² 50true 2013/1/31 4:04:32 YU Kun,ZHANG Changrui,CAO Yingbin and LIU Rongjun 49true 2013/1/31 0:00:00 1,2,FENG Jian¹,XIAO Hanning²,ZHANG Changrui¹ and JIANG Yonggang¹]]> ZHOU Xiangfa^1,2,FENG Jian¹,XIAO Hanning²,ZHANG Changrui¹ and JIANG Yonggang¹ 48true 2SO₄-H₂O system. The current study found that latent heat for inorgonic hydrated salt is made of reaction enthalpies, dissolution heats, integral dissolution heats. In addicition, the latent heat of phase change was calculated. Compared with experimental data, the relative error of the calculated results is just 2%.]]> 2013/1/31 4:04:32 MAN Yahui and WU Wenjian 47true 4)₂SO₄. The composition and structure of the synthesized product was characterized and confirmed by GC-MS, FT-IR and 1H-NMR. Cured polyborazine was obtained by heating borazine at 80℃ for 72hrs and was converted to BN ceramic after pyrolysis. The pyrolysis behavior of polyborazine was investigated based on TG, FT-IR and XRD analysis. The results show that polyborazine still holds some B-H and N-H bonds, which will be continuously dehydrogenated when heated, and the ceramic yield is about 89.5％at 1400℃. Bonds of B-H are broken mainly before 800℃, while disappearance of N-H bonds occurs at much higher temperature. The inorganic extent is high and amorphous BN is obtained when polyborazine is pyrolyzed at 800℃, while h-BN is obtained when it is pyrolyzed at 1600℃.]]> 2012/11/8 3:52:57 ZOU Xiaorong,ZHANG Changrui,CAO Feng,WANG Siqing,LI Bin,JIANG Yonggang and LI Junsheng 46true 2012/9/6 8:52:14 LIU Zhuofeng,XIAO Jiayu,ZENG Jingcheng and JIANG Dazhi 45true 2012/9/19 9:01:22 WANG Chunqi,JIANG Dazhi,ZENG Jingcheng,YUAN Zhiqing and XIAO jiayu 44true 2012/9/19 9:01:23 1,2,3,XIAO Jiayu¹,ZENG Jingcheng¹,WANG Jin² and YANG Jun²]]> ZHOU Pengzhan^1,2,3,XIAO Jiayu¹,ZENG Jingcheng¹,WANG Jin² and YANG Jun² 43true 2 aerogel insulation composites were prepared by using ceramic fibers as reinforcement via supercritical drying process. Due to the ultra fine skeleton particles and nano-porous structure, silica aerogels have low gas thermal conductivity and solid thermal conductivity, and ceramic fibers greatly decrease radioactive thermal conductivity. Silica aerogel composites show excellent thermal insulation properties. The thermal conductivities at　200℃ and 800℃ are only 0.017W/m?K and 0.042W/m?K, respectively. The strength of the aerogel skeleton is enhanced by high temperature heat treatment, and with the reinforcement of fibers, the aerogel composites exhibit good mechanical 　property. The tensile, bending and compressive strengths at ambient temperature are 1.44MPa, 1.31MPa and 0.98MPa (10%strain), respectively, and the tensile, bending and compressive strengths at 800℃ are 1.95MPa, 1.80MPa and 1.42MPa (10%strain), respectively.]]> 2012/9/19 0:00:00 FENG Jian,GAO Qingfu,FENG Junzong and JIANG Yonggang 42true 2012/9/19 9:01:36 LIU Jun,XIAO Jiayu,ZENG Jingcheng,JIANG Dazhi and PENG Chaoyi 41true 2012/9/19 9:01:36 ZHANG Tong,WU Wenjian and HU Biru 40true 2 glass.]]> 2012/9/12 11:15:11 ZHAO Dan,ZHANG Changrui,HU Haifeng and ZHANG Yudi 39true 2012/8/28 0:00:00 WANG Chunqi,JIANG Dazhi,ZENG Jingcheng and XIAO jiayu 38true TTD≈CTD>CI. As CTD and CI have less content of polarity groups, such as ester and amine, seawater absorption of CTD and CI is smaller than that of TTD and TI. After seawater immersion, part of the ester groups hydrolyzes and the matrix becomes more brittle. As a result, the tensile and flexural strength of the matrixes are decreased significantly. CTD system recovers about 92% of the original tensile strength after drying processing.]]> 2012/8/28 10:29:47 BIAN Liping,XIAO Jiayu,ZENG Jingcheng,LIU Jun and XING Suli 37true 2013/1/11 4:19:30 1,2,MA Wujun²,WU Jianjun¹ and LIU Zhiquan²]]> LIU Yanjie^1,2,MA Wujun²,WU Jianjun¹ and LIU Zhiquan² 36true 2012/11/5 8:48:03 XU Jing 35true 3,2%Sb₂O₃ is the best of all. Viscosity of the resin system at room temperature is about 100mPa·s, and the gel time of the resin is beyond 80 min, which satisfies the requirement of RTM and VIMP process for large composite parts. The tensile strength and modulus of the glass fabric reinforced the resin composites are 215.4MPa and 13.85GPa, respectively. The bending strength and modulus are 177.15MPa and 13.36GPa, respectively. And the LOI of the composites is 39.7.]]> 2012/11/5 8:48:03 1,XIAO Jiayu¹,LIU Jun¹,ZENG Jingcheng¹ and TAN Yan^1,2]]> JIANG Cai¹,XIAO Jiayu¹,LIU Jun¹,ZENG Jingcheng¹ and TAN Yan^1,2 34true 3+.In the visible region, the light transmittance of the ZnO thin films with 3% aluminum is about 90%, and the band gap is about 3.25 eV, which can meet the material requirements for photoelectric devices such as photovoltaic solar cell.]]> 2012/8/28 0:00:00 ZHENG Chunman,SONG Zhiyan,WEI Haibo,TIE Nan and XIE Kai 33true 2012/8/28 10:28:44 1,2,XIAO Jiayu¹,XU Wangsheng²,ZENG Jingcheng¹,LIU Jun¹ and JIANG Weihe³]]> LV Wenli^1,2,XIAO Jiayu¹,XU Wangsheng²,ZENG Jingcheng¹,LIU Jun¹ and JIANG Weihe³ 32true 2012/8/28 10:28:44 1,SUN Pengfei¹ and DUAN Jingbo²]]> YUAN Jiehong¹,SUN Pengfei¹ and DUAN Jingbo² 31true 1-xB_xMO₃), vanadium dioxide (VO₂), tungsten trioxides(WO₃) and conducting polymers (CPs) respectively, are preferentially presented. Based on the total needs of spacecraft thermal control, the development trend of variable emissivity materials is discussed finally．]]> 2012/8/28 10:27:55 LIU Dongqing,CHENG Haifeng,ZHENG Wenwei and ZHANG Chaoyang 30true 2014/11/25 10:16:01 1,2,XING Xin¹,WANG Jun¹ and CHENG Haifeng¹]]> HAN Xiaoyi^1,2,XING Xin¹,WANG Jun¹ and CHENG Haifeng¹ 29true 2014/3/12 14:49:31 DU Gang,XIAO Jiayu,JIANG Dazhi and XU Yang 28true 2015/12/31 10:10:58 ZHANG Dapeng and LEI Yongjun 27true 2015/11/9 16:21:58 LI Jin and TANG Guojin 26true 2015/9/1 15:03:07 WU Hai, XIAO Jiayu, XING Suli, WEN Siwei, YANG Fubiao and YANG Jinshui 25true 2015/6/30 18:53:57 1,2, JIANG Zhigang¹, WAN Fan¹, LIU Fei¹ and TAN Qinghua¹]]> ZHEN Ming^1,2, JIANG Zhigang¹, WAN Fan¹, LIU Fei¹ and TAN Qinghua¹ 24true 2SiO₄ during the reduction process. When washed with HCl, MgO and Mg₂SiO₄ react with HCl and turn into MgCl₂, which can dissolve in the solution. Then, the porous Si/Si-O-C anode materials are formed. The silicon distribute in the porous Si-O-C material, which can improve the cycle performance of silicon. It can confirms that the material prepared by using magnesium reduction method is a potential material for the lithium-ion battery.]]> 2016/7/7 0:00:00 ZHENG Chunman, LIU Xiang, XIE Kai and HAN Yu 23true 2 atmosphere. The SEM(scanning electron microscope) characterization result shows that the graphene paper with the bigger graphene sheet size is of higher density. The XRD(X-ray diffraction) characterization result also shows that the crystalline of the graphene paper is increased when the graphene sheet size is bigger. When graphene sheet size increased from the range of 0.3 μm～5 μm to that of 50 μm～100 μm, the thermal conductivity is about 632.8 W/mK and 683.7 W/mK respectively，which is increased by 8%. ]]> 2016/7/7 0:00:00 SHI Gang, ZHANG Jianwei, LEI Bowen, JU Su and JIANG Dazhi 22true 2016/7/7 11:14:18 1, WAN Fan^1,2, TAN Qinghua¹, LIU Fei¹ and SONG Dianyi¹]]> JIANG Zhigang¹, WAN Fan^1,2, TAN Qinghua¹, LIU Fei¹ and SONG Dianyi¹ 21true 2016/3/7 9:21:21 XIAO Jiayu, XIAO Zhongfan, YANG Jinshui, XING Suli and WEN Siwei 20true 2016/3/7 0:00:00 ZENG Jingcheng, WEI Kaiyao, DU Gang, YANG Jinshui and JU Su 19true 2016/3/7 9:21:21 XING Suli, TANG Jun and XIAO Jiayu 18true 3 and 4.71%, respectively. A compact oxide film generates upon the modified C/C composite after oxyacetylene flame ablated 360 s, which is mainly composed of HfO₂, ZrO₂ and Ta₂O₅. The linear ablation rate of modified C/C composite is 0.005 18 mm/s. The ablation resistance of modified C/C composite bulb model is assessed by high-frequency plasma wind tunnel, the heat flux is 3.53 MW/m², the stagnation temperature is 2293 ℃, and the test duration is 180s. After ablation, a dense oxide protective layer forms on the surface of the model, the shape and the dimension of the model are changed insignificantly, and the linear ablation rate is 0.001 72 mm/s after removing the oxide layer.]]> 2016/3/7 9:21:21 ZHANG Hong, BAI Hongde, BAI Shuxin, YE Yicong and ZHU Li′an 17true 2016/3/7 9:21:21 1, LI Juan² and WEI Kaiyao¹]]> YANG Jinshui¹, LI Juan² and WEI Kaiyao¹ 16true 2016/3/7 9:21:21 JIANG Cai, ZHANG Jianwei, SHANG Xinlong, LIN Shaofeng, JU Su and JIANG Dazhi 15true 2016/3/7 9:21:21 HUANG Chunfang, XIAO Jiayu, ZHENG Qing, JU Su and JIANG Dazhi 14true p/Cu composite was prepared by vacuum hot-pressing sintering, and the effects of the interfacial layer thickness on the thermal conductivity property were studied in detail. Results are as follows: molybdenum coating can be successfully deposited on the surface of silicon carbide by magnetron sputtering method, the roughness and the thickness of the film are enhanced with the sputter time postponed, and the molybdenum on the surface is in amorphous state. After the crystallized heat treatment, the molybdenum coating is in densification crystalline state. The sputtering time affects the thickness of the Mo coating and the thermal conductivity of SiC_p/Cu obviously. With the time postponed, the thickness of the Mo coating is increased. And the thermal conductivity increases firstly and then decreases as the sputtering time increases. The thermal conductivity of the SiC_p/Cu composite in 800 ℃crystallized heat treatment fabricated by the 9 h Mo coated SiC powders in 850 ℃ hot pressing can reach 274.056 W/(m·K) when the volume fraction of SiC is about 50%.]]> 2016/3/7 0:00:00 LIU Meng, BAI Shuxin, LI Shun, ZHAO Xun and XIONG Degan 13true 2016/3/7 0:00:00 1,2, JU Su², CHEN Daqing¹, CHEN Yong¹, REN Mingli¹ and ZHANG Tianbin¹]]> LI Changliang^1,2, JU Su², CHEN Daqing¹, CHEN Yong¹, REN Mingli¹ and ZHANG Tianbin¹ 12true 2016/3/7 9:21:21 WU Hai, XIAO Jiayu, XING Suli, WEN Siwei, YANG Fubiao and YANG Jinshui 11true 2016/3/7 9:21:23 1,2, HAN Junli², LEI Yongjun¹ and MENG Shangyang²]]> YANG Junhui^1,2, HAN Junli², LEI Yongjun¹ and MENG Shangyang² 10true 2017/11/7 15:44:03 ZHANG Dapeng, LEI Yongjun and SHEN Zhibin 9true 2017/7/9 11:57:47 WANG Hao and WANG Zhongwei 8true 2017/3/7 11:55:45 YUAN Qin and SONG Yongcai 7true 2019/1/21 16:09:52 1, ZHOU Xiaosong^1,2 and WU Fan¹]]> MEI Zhiyuan¹, ZHOU Xiaosong^1,2 and WU Fan¹ 6true 2018/5/11 16:33:58 1,2, LI Huadong², MEI Zhiyuan² and ZHOU Xiaosong²]]> LIU Ling^1,2, LI Huadong², MEI Zhiyuan² and ZHOU Xiaosong² 5true 2018/3/23 11:05:19 1, WANG Peng², HE Mingchang¹, XIAO Jiayu¹, JU Su¹ and JIANG Dazhi¹]]> HUANG Chunfang¹, WANG Peng², HE Mingchang¹, XIAO Jiayu¹, JU Su¹ and JIANG Dazhi¹ 4true 2018/3/23 11:05:20 XIA Ge, YANG Li, KOU Wei and DU Yongcheng 3true 2019/9/30 0:00:00 LIU Jun, BIAN Jiayan, BAO Zheng and ZHOU Yuanming 2true 2019/7/18 15:28:48 CHENG Yong, LU Yimin, HUANG Guojun, WAN Qiang, LI Wei, WEI Shangfang, TIAN Fangtao and MI Chaowei 1true