KEY ROLE OF OXYGEN AT ZINC-OXIDE VARISTOR GRAIN-BOUNDARIES

被引：170

作者：

STUCKI, F

GREUTER, F

机构：

[1] Asea Brown Boveri, Corporate Research

来源：

APPLIED PHYSICS LETTERS | 1990年 / 57卷 / 05期

关键词：

D O I：

10.1063/1.103661

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electrical transport properties of zinc oxide varistors are correlated with the chemistry of their grain boundaries. An adsorbed layer of bismuth, about 5 Å thick, is necessary to create potential barriers at the grain boundaries. The height of these potential barriers depends sensitively on the excess amount of oxygen (∼1 monolayer) present at the interfaces between grains. This oxygen enrichment is influenced by thermal processing and by electrical degradation.

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页码：446 / 448

页数：3

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