| 定向分布碳纤维复合材料介电性能研究 |
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| 引用本文： | 伏金刚,朱冬梅,周万城,罗发.定向分布碳纤维复合材料介电性能研究[J].无机材料学报,2012,27(11):1223-1227. |
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| 作者姓名： | 伏金刚 朱冬梅 周万城 罗发 |
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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： | National Natural Science Foundation of China(51072165) |
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| 摘 要： | 以碳纤维为填充物, 环氧树脂为基体, 制备了碳纤维/环氧树脂介电复合材料. 介绍了两种分布方式对复合材料介电性能的影响, 分别研究了两种分布方式的介电常数随碳纤维含量和长度的变化规律. 在2.6–8.2 GHz频率范围内, 轴向介电常数是径向介电常数的数倍; 实部和虚部都随着碳纤维含量的增加而增大; 碳纤维长度也对介电性能的各向异性影响显著. 双层微波传输带模型可以合理地解释这些规律.
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| 关 键 词： | 各向异性 介电性能 复合材料 短切碳纤维 |
| 收稿时间： | 2012-06-01 |
| 修稿时间： | 2012-06-13 |
Anisotropic Dielectric Properties of Short Carbon Fiber Composites |
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| FU Jin-Gang, ZHU Dong-Mei, ZHOU Wan-Cheng, LUO Fa.Anisotropic Dielectric Properties of Short Carbon Fiber Composites[J].Journal of Inorganic Materials,2012,27(11):1223-1227. |
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| Authors: | FU Jin-Gang ZHU Dong-Mei ZHOU Wan-Cheng LUO Fa |
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| Affiliation: | (State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China) |
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| Abstract: | Dielectric materials based on short carbon fiber (Csf) dispersed inside epoxy resin (EP) matrix composites were prepared. The complex permittivity of two types of distributions over the frequency range from 2.6 GHz to8.2 GHz was reported. The effects of orientation with different content and length of carbon fibers on dielectric properties were investigated. It is found that axial permittivity of carbon fibers is several times larger than their radial permittivity. The real and imaginary parts of complex permittivity increase gradually with increasing the Csf contents in the composites, and the fiber length also affects the anisotropic property greatly. The two layered transmission line model is used to explain the phenomena. |
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| Keywords: | anisotropic dielectric properties composite materials short carbon fiber |
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