非球形导电粒子与绝缘体复合材料的介电增强研究

导电粒子掺入到绝缘体中会显着提高其介电常数,理论上这种增强超出了C-M方程和其它偶极近似的结果.近来有人1]引入一种有效集结模型来描述这种增长规律,其中对于非球形导电粒子的影响引入一个形状因子u₀来描述,但他们都是把绝缘体作为基体来处理.本文的目的在于采用对等来处理这种介质,像文献2]一样来修正D-J方程,同时与铜、铝微粒掺入聚乙烯中的实验规律进行了比较,微观分析了微粒的形貌和分布,得到与理论相符合的结果.

STUDY OF MODEL OF DIELECTRIC ENHANCEMENT IN COMPOSITES FOR NON SPHERICAL CONDUCTING PARTICLES AND INSOLATOR

The permittivity of a composite with embedded conducting particles exhibits a large enhancement above the value by the Clausius-Mossotti and other dipole approximation. Recently a few people have developed an effective cluster model for the law, in which the effect on the shape of the conducting particles was described by using a factor u0. The insulator was treated only as a matrix. This paper is aimed to treat the metal and the insulator on an equal footing and improve the model as in paper 2]. Finally a comparison was made with our permittivity measurement of the composites LDPE with embedded Cu and Al powders and the electron micrograph of the samples was examined, which shows that the theory is in excellent agreement with the experiments.