| 聚苯乙烯-钛酸钡复合材料的介电特性研究 |
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| 引用本文： | 薛庆忠,卢贵武. 聚苯乙烯-钛酸钡复合材料的介电特性研究[J]. 复合材料学报, 2001, 18(1): 55-57 |
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| 作者姓名： | 薛庆忠 卢贵武 |
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| 作者单位： | 石油大学 应用物理系, 山东东营 157061 |
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| 摘 要： | 建立了一个考虑中间相的"复合介电模型",利用平均极化理论和Maxwell-Garnett理论导出了考虑中间相的二元无规复合材料的有效介电常数的普适计算公式。用该公式分析了聚苯乙烯-钛酸钡复合材料的有效介电常数。当钛酸钡体积含量小于20%时,理论值与实验结果符合较好。
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| 关 键 词： | 复合材料 介电 中间相 |
| 文章编号： | 1000-3851(2001)01-0055-03 |
| 收稿时间： | 1999-09-09 |
| 修稿时间： | 1999-09-09 |
STUDY OF THE DIELECTRIC PROPERTIES OF POLYSTYRENE-BARIUM TITANATE COMPOSITES |
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| XUE Qing-zhong,LU Gui-wu. STUDY OF THE DIELECTRIC PROPERTIES OF POLYSTYRENE-BARIUM TITANATE COMPOSITES[J]. Acta Materiae Compositae Sinica, 2001, 18(1): 55-57 |
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| Authors: | XUE Qing-zhong LU Gui-wu |
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| Affiliation: | Department of Physics, University of Petroleum, Dongying 257062, China |
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| Abstract: | In the course of making polystyrene-barium titanate composites, due to diffusion, etc, there exist interfaces between the scattered grains and the host medium. The dielectric properties of the interfaces are different from the dielectric properties of polystyrene and barium titanate. Considering the interfaces between polystyrene and barium titanate, a new "complex model" of dielectric constant of two-phase composites is built up. Starting from the average polarization theory and Maxwell-Garnett theory, the effective dielectric constant of two-phase random composites with an interface is presented. When the volume fraction of the scatter grain is smaller than 20%, the theoretical results on dielectric properties of polystyrene-barium titanate composites with interface are in good agreement with experimental data. |
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| Keywords: | composites dielectric constant interface |
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