法拉第广义电容率定义的研究  

A Study of Definition of Faraday's Generalized Permittivity

作　　者：王士良[1] 

机构地区：[1]华中科技大学电子科学与技术系,武汉430074

出　　处：《前沿科学》2014年第4期48-55,共8页Frontier Science

摘　　要：外电源给予的直流电场强度E的规则D=εE不同于库伦电场强度E库的规则D库=εE库。E=E库的混合规则D（=D库）=εE给（绝对）电容率ε的定义提供了依据。E=E库式子不能成立,D（=D库）=εE式子也不能成立。所以当今电介质的（绝对）电容率ε定义必须修改。当初法拉第电容率的定义是在直流电场下发现的。这一发现与库伦电场无关。法拉第电容率定义的特征可用D（=εE）与ε成正比来表示。D0=ε0E,D=εE,D？=ε？E~和[Dij]=[εij]E都是法拉第广义电容率定义的依据。用法拉第广义电容率的定义去替代IEC 60050 121出版物的（绝对）电容率定义符合了历史发展的必然趋势。最后本文还对交变库伦电场的问题进行了探讨。The rule D=εE of the DC electric field strength E given by an external source is different from the rule Dc=εEc of the coulombian electric field strength Ec. The mixed rule D（=D,）=εE of E=E, provides the basis for the definition of （absolute） permittivity ε. Eq. E=Ec does not hold and Eq. D（=Dc）=εE does not too. So the nowaday definition of （absolute） permittivity e must be revised. Originally,the definition of Faraday＇ s permittivity was discovered under the DC electric field. This discovery has nothing to do with the coulombian electric field. The definition of Faraday＇s permittivity features the fact that D（=εE） is directly proportional to ε. Do = ε0 E, D = εE , D =εE and [Dij]=[ εij ]E all are the basis of the definition of Faraday＇s generalized permittivity. The definition of Faraday＇ s generalized permittivity has replaced the definition of the （absolute） permittivity of IEC 60050 Publication 121-1998 in accordance with the trend of historical development. Finally, a subject of the alternating coulombian electric field is discussed in this paper.

关 键 词：电源 库伦 力 电场强度 电通量密度 法拉第 广义 电容率 

分 类 号：O441.1[理学—电磁学]