Development of functional microstructure during sintering of a ZnO varistor material

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1993.tb03690.x· OSTI ID:6270583

Olsson, E; Dunlop, G; Oesterlund, R ^[1]

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1. Chalmers Univ. of Technology, Goeteborag (Sweden). Dept. of Physics

The effects of sintering time and rate of cooling on the microstructure and current/voltage characteristics of a ZnO varistor material have been investigated. The results provide information about the development of microstructure during sintering and have been interpreted in terms of the role which microstructure plays in the determination of electrical properties. A continuous network of intergranular Bi[sub 2]O[sub 3], which lies mainly along the triple junctions between ZnO grains, can give a substantial contribution to the leakage current. The conductivity of this skeleton depends upon its internal microstructure.

• OSTI ID: 6270583
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:1; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
360606 -- Other Materials-- Physical Properties-- (1992-)
ANTIMONY
BISMUTH COMPOUNDS
BISMUTH OXIDES
CHALCOGENIDES
COBALT
COOLING
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELEMENTS
EQUIPMENT
FABRICATION
GRAIN BOUNDARIES
METALS
MICROSTRUCTURE
MINERALS
NICKEL
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
RESISTORS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR RESISTORS
SINTERING
SPINELS
TIME DEPENDENCE
TRANSITION ELEMENTS
ZINC COMPOUNDS
ZINC OXIDES