| SiC(N)/LAS纳米陶瓷复合材料的介电特性 |
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| 引用本文： | 罗发,周万城,焦桓,赵东林.SiC(N)/LAS纳米陶瓷复合材料的介电特性[J].复合材料学报,2003,20(3):98-101. |
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| 作者姓名： | 罗发 周万城 焦桓 赵东林 |
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| 作者单位： | 西北工业大学,凝固技术国家重点实验室,西安,710072 |
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| 基金项目： | 航空基金资助项目(99G53082) |
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| 摘 要： | 采用LAS玻璃粉末和激光诱导法制备的纳米SiC(N)粉体,通过热压烧结法制备了SiC(N)/LAS纳米陶瓷复合材料,研究了该复合材料在8.2~12.4GHz频率范围内的微波介电特性。结果表明,SiC(N)/LAS的介电常数主要受纳米SiC(N)粉体含量的控制,此外还与烧结温度有关。随着烧结温度的提高,复合材料介电常数和介电损耗均随之增大。SiC(N)/LAS对电磁波的损耗作用明显优于同体积分数的纳米SiC(N)与石蜡混合体,这与烧结过程中形成的碳界面有关。
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| 关 键 词： | 纳米SiC(N) LAS玻璃陶瓷 SiC(N)/LAS复合材料 介电常数 |
| 文章编号： | 1000-3851(2003)03-0098-04 |
| 收稿时间： | 2001-12-12 |
| 修稿时间： | 2002-04-01 |
DIELECTRIC PROPERTIES OF SiC(N)/LAS NANO-COMPOSITE |
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| LUO Fa,ZHOU Wancheng,JIAO Huan,ZHAO Donglin.DIELECTRIC PROPERTIES OF SiC(N)/LAS NANO-COMPOSITE[J].Acta Materiae Compositae Sinica,2003,20(3):98-101. |
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| Authors: | LUO Fa ZHOU Wancheng JIAO Huan ZHAO Donglin |
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| Affiliation: | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | The nano SiC(N) powder was synthesized by laser-induced gas-phase reaction. SiC(N)/LAS nano-composite was prepared from LAS glass powder and as-formed nano SiC(N) powder by the hot-pressing method. The microwave dielectric properties of the nano-composite in a frequency range of 8.2~12.4 GHz were studied. The results show that the permittivity of the nano-composite is related closely to the contents of nano SiC(N) and influenced fairly by sintering temperatures. Compared with the mixture of nano SiC(N) and paraffin, the sintering process improved the nano-composite's dissipation to electromagnetic wave. This amelioration is ascribed to the formation of carbon interface between nano SiC(N) and LAS matrix. |
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| Keywords: | nano SiC(N) LAS glass-ceramic SiC(N)/LAS nano-composite permittivity |
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