| 具有梯度壳层的球形颗粒复合体系的介电响应 |
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| 引用本文： | 桑芝芳 周建兰. 具有梯度壳层的球形颗粒复合体系的介电响应[J]. 苏州大学学报(医学版), 2004, 20(4): 51-55 |
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| 作者姓名： | 桑芝芳 周建兰 |
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| 作者单位： | 苏州大学物理科学与技术学院 江苏苏州215006(桑芝芳)，苏州大学物理科学与技术学院 江苏苏州215006(周建兰) |
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| 基金项目： | 国家自然科学基金资助项目(10174049)江苏省薄膜材料重点实验室开放课题 |
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| 摘 要： | 研究了梯度壳层球形颗粒复合体系的有效介电响应，推导了具有任意多壳层的球形颗粒的等效介电常数的一般递推公式；用微分有效偶极近似的方法推导出任意介电梯度形式球形颗粒的等效介电常数的一般微分方程，并以壳层的介电常数为半径的幂函数形式为例，得到了梯度壳层球形颗粒的等效介电常数．从而在极稀释条件下，根据Maxwell-Garnett近似(MGA)，得到了梯度壳层球形颗粒复合体系的有效介电常数．
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| 关 键 词： | 梯度 球形颗粒 等效 近似 推导 递推公式 复合体系 壳层 介电常数 研究 |
| 文章编号： | 1000-2073(2004)04-0051-05 |
| 修稿时间： | 2004-05-25 |
Effective dielectric response of granular composites containing spherical particles with graded shells |
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| SANG Zhi-fang,ZHOU Jian-lan. Effective dielectric response of granular composites containing spherical particles with graded shells[J]. Journal of Suzhou University(Natural Science), 2004, 20(4): 51-55 |
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| Authors: | SANG Zhi-fang ZHOU Jian-lan |
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| Abstract: | The effective dielectric response of granular composites containing spherical particles with graded shells is investigated. The general recursion formula of equivalent dielectric constant of multi-shell particles is derived. The differential equation of equivalent dielectric constant of spherical particles with graded shells is also obtained in differential effective dipole approximation(DEDA), and especially a power-law gradation profile in shells is studied in detail. According to MGA,we have calculated the effective dielectric constant of the composite containing spherical particles with graded shells in a dilute limit. |
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| Keywords: | effective dielectric response gradation(graded) equivalent dielectric constant |
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