Density-permittivity relationships for powdered and granular materials

被引：101

作者：

Nelson, SO ^{[1
]}

机构：

[1] USDA ARS, Russell Res Ctr, Athens, GA 30604 USA

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2005年 / 54卷 / 05期

关键词：

density; dielectric constant; dielectric loss factor; dielectric mixture equations; permittivity; powdered materials; pulverized materials;

D O I：

10.1109/TIM.2005.853346

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：

Relationships between the permittivities of powdered or granular solid materials and their bulk densities (density of the air-particle mixture) are discussed. Linear relationships between functions of the permittivity and bulk density are identified that are useful in determining permittivity of solids from measurements of the permittivity of pulverized samples. The usefulness of several dielectric mixture equations for calculating solid material permittivity from measured permittivity of pulverized samples is also discussed. Results of testing linear extrapolation techniques and dielectric mixture equations on pulverized coal, limestone, plastics, and granular wheat and flour are presented. Recommendations are provided for reliable estimation of solid material permittivities or changes in permittivities of powdered and granular materials as a result of changes in their bulk densities.

引用

页码：2033 / 2040

页数：8

共 33 条

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