Measurement of the Dielectric Permittivity of Powder Materials: A General Approach by Using Dielectrophoretic Forces

被引：0

作者：

Belijar, Guillaume ^{[1
]}

Valdez-Nava, Zarel ^{[1
]}

Diaham, Sombel ^{[1
]}

Laudebat, Lionel ^{[1
,2
]}

Lebey, Thierry ^{[1
]}

机构：

[1] Univ Toulouse, LAPLACE, CNRS, INPT,UPS, Toulouse, France

[2] Inst Natl Univ Champoll, Albi, France

来源：

2017 INTERNATIONAL SYMPOSIUM ON ELECTRICAL INSULATING MATERIALS (ISEIM), VOLS 1 & 2 | 2017年

关键词：

powder permittivity measurement; dielectrophoresis;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We propose in this work to use the dielectrophoretic forces to estimate the dielectric permittivity of ceramic powders dispersed in a liquid media. When a divergent electric field is applied to the suspension, the dielectrophoretic force will either repel the particles (negative dielectrophoresis, n-DEP) or attract them (positive dielectrophoresis, p-DEP) to the strong electric field gradient. We identify a crossover frequency for the suspension and we are able to estimate the permittivity values of two high permittivity ceramic powders (barium and strontium titanate). The values of the permittivity are in agreement with those obtained by using a Lichtenecker mixing rule in epoxy composites.

引用

页码：77 / 80

页数：4

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