Published March 1982 | Version v1
Journal article Metadata-only

Compositional changes adjacent to grain boundaries during electrical degradation of a ZnO varistor

Creators

  • 1. Ceramics Division, Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Description

Compositional changes adjacent to grain boundaries in heavily degraded samples of a ZnO varistor containing the additives Bi and Co have been observed with the scanning transmission electron microscope. A marked asymmetry in the distribution of Bi and Co with respect to the physical location of the boundary is found, consistent with the accumulation of mobile cations on one side of the boundary under the influence of a dc electric field

Additional details

Publishing Information

Journal Title
J. Appl. Phys.
Journal Volume
53
Journal Issue
3
Series
J. Appl. Phys.
Journal Page Range
1765-1768
ISSN
0021-8979

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
13677562
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BISMUTH ADDITIONS; CATIONS; COBALT ADDITIONS; DIRECT CURRENT; ELECTRIC FIELDS; ELECTRON MICROSCOPY; ELECTRON SCANNING; GRAIN BOUNDARIES; QUANTITY RATIO; SEMICONDUCTOR RESISTORS; SPATIAL DISTRIBUTION; ZINC OXIDES
Descriptors DEC
CHALCOGENIDES; CHARGED PARTICLES; CRYSTAL STRUCTURE; CURRENTS; DISTRIBUTION; ELECTRIC CURRENTS; ELECTRICAL EQUIPMENT; IONS; MICROSCOPY; MICROSTRUCTURE; OXIDES; OXYGEN COMPOUNDS; RESISTORS; SEMICONDUCTOR DEVICES; ZINC COMPOUNDS