GRAIN-SIZE CONTROL IN LOW-VOLTAGE VARISTORS

被引：42
|
作者：
HENNINGS, DFK
HARTUNG, R
REIJNEN, PJL
机构：
[1] TECH UNIV BERLIN,INST NICHTMETALL WERKSTOFFE,W-1000 BERLIN 12,GERMANY
[2] INST GESTEINSHUTTENKUNDE,W-5100 AACHEN,GERMANY
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 03期
关键词：
electrical properties; grain size; titania; varistors; zinc oxide;
D O I：
10.1111/j.1151-2916.1990.tb06566.x
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Low‐voltage ZnO varistors often suffer from a large spread in the current/voltage characteristics, due to discontinuously grown, inhomogeneous microstructures. Addition of seed grains to the ceramic powder is an effective means of preventing the growth of single large grains, thus making the control of final grain size and electrical properties much easier. Seed grains are generally single‐crystalline particles of the same composition with a grain size which is considerably larger than the average grain size of the starting ZnO powder. Copyright © 1990, Wiley Blackwell. All rights reserved
引用
收藏
页码：645 / 648
页数：4
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