Development of Functional Microstructure during Sintering of a ZnO Varistor Material
- 1 January 1993
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 76 (1) , 65-71
- https://doi.org/10.1111/j.1151-2916.1993.tb03690.x
Abstract
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 Bi2O3, 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.Keywords
This publication has 15 references indexed in Scilit:
- Characterization of individual interfacial barriers in a ZnO varistor materialJournal of Applied Physics, 1989
- Metal Oxide VaristorsAnnual Review of Materials Science, 1987
- The microstructure of a ZnO varistor materialJournal of Materials Science, 1985
- Formation Mechanism of Nonohmic Zinc Oxide CeramicsJapanese Journal of Applied Physics, 1980
- Theory of conduction in ZnO varistorsJournal of Applied Physics, 1979
- Electrical properties of the α, β, γ, and δ phases of bismuth sesquioxideJournal of Solid State Chemistry, 1978
- Powder Diffraction Patterns and Structures of the Bismuth OxidesJournal of the American Ceramic Society, 1978
- On the Structure of Bismuthsesquioxide: The α, β, γ, and δ‐phaseZeitschrift für anorganische und allgemeine Chemie, 1978
- Investigation of various models for metal oxide varistorsJournal of Electronic Materials, 1976
- Nonohmic Properties of Zinc Oxide CeramicsJapanese Journal of Applied Physics, 1971