IMPULSE-DEGRADATION ANALYSIS OF ZNO-BASED VARISTORS BY AC IMPEDANCE MEASUREMENTS

被引：8
|
作者：
BUI, A [1 ]
ALABDULLAH, K [1 ]
LOUBIERE, A [1 ]
TAO, M [1 ]
NGUYEN, QC [1 ]
机构：
[1] ETAB SOULE,F-65200 BAGNERES BIGORE,FRANCE
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 1991年 / 24卷 / 05期
关键词：
D O I：
10.1088/0022-3727/24/5/019
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A new degradation analysis of ZnO-based varistors by AC impedance measurements is presented. From these measurements, which have been achieved on samples as a response to a small signal in the frequency range 10(-3) to 10(5) Hz, at room temperature, the distribution function of the relaxation time constant has been deduced. The heterogeneity factor beta characterizing the barriers constituting the ZnO-based varistors has been used as a measure of degradation. Our data reveal that the grain boundaries are not identical, in good agreement with the numerical/experimental current(l)-voltage(V) characteristics of various single-grain junctions.
引用
收藏
页码：757 / 762
页数：6
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