论文部分内容阅读
在１０４至１０－５Ｈｚ频段，聚合物的介电谱只能用时域参数描述．介质的极化响应可描述为Ａεｓｅｘｐ［－（ｔ／τ）类型的若干个项之和．实验证明在随机驰豫中α＝１，在自由驰豫中则α＝１／２．在低频段用频域方法测量εｓ时．样品中的慢响应极化机构的贡献表现为吸收电流；它使得εｓ没有确定值，时域参数是十分灵敏的方法，它可以检测出对εｓ的贡献只有１０－４的微量极化机构．对于同一种聚合物、慢极化响应的成份决定于材料的加工工艺和添加物．
In the 104 to 10-5Hz band, the dielectric spectrum of the polymer can only be described by the time-domain parameters. The polarization response of a medium can be described as the sum of several terms of the type Aεsexp [- (t / τ). Experiments show that α = 1 in random relaxation and α = 1/2 in free relaxation. In the low-frequency band method of measuring εs. The contribution of the slow-response polarizer in the sample is expressed as the sink current; it makes εs undefined, and the time-domain parameter is a very sensitive method that can detect micropolar polarizations that contribute only 10-4 to εs. For the same polymer, slow polarization response depends on the composition of the material processing technology and additives.