| Preparation and microwave dielectric properties of Csf/Si3N4 composites |
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| 作者姓名： | 王晓艳 罗发 李鹏 苏晓磊 朱冬梅 周万城 |
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| 作者单位： | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi＇an 710072, China |
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| 摘 要： | The CJSi3N4 composites were prepared by hot-press sintering method using α-Si3N4 power, short carbon fibers and La2O3-Y2O3 sintering additives. The mechanical and microwave dielectric properties of CjSi3N4 composites were studied and discussed. The results show that the addition of the short carbon fibers can not destroy the relative density of the sintered samples, but it deteriorates the flexural strength of the sintered samples, so the flexural strength of the silicon nitride matrix is the highest among the samples. The real part （ε3 and the imaginary part （ε＇3 of the permittivity of CsfCSi3N4 composites greatly increase with increasing voltmae fraction of the short carbon fibers, achieve the maximum 73.1 and 101.5, respectively. A strong frequency dependence of the imaginary part （ε″） of the permittivity is observed.
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| 关 键 词： | 碳/氮化硅复合物 短碳纤维 机械性能 微波介电性能 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-09-10 |
Preparation and microwave dielectric properties of Csf/Si3N4 composites |
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| WANG Xiao-yan, LU Fa, LI Peng, SU Xiao-lei, ZHU Dong-mei, ZHU Wan-cheng.Preparation and microwave dielectric properties of Csf/Si3N4 composites[J].Transactions of Nonferrous Metals Society of China,2007,17(A02):653-655. |
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| Authors: | WANG Xiao-yan LU Fa LI Peng SU Xiao-lei ZHU Dong-mei ZHU Wan-cheng |
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| Affiliation: | WANG Xiao-yan, LU0 Fa, LI Peng, SU Xiao-lei, ZHU Dong-mei, ZH0U Wan-cheng |
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| Abstract: | |
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| Keywords: | Csf/Si3N4 composites short carbon fibers mechanical property dielectric properties |
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