摘要
导电粒子掺入到绝缘体中会显著提高其介电常数，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。
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 u 0. 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 . 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.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1997年第3期91-98,共8页
Acta Materiae Compositae Sinica
关键词
复合材料
介电常数
集结
导电粒子
绝缘体
composites, permittivity, cluster, conducting particles, insulator
