Sol-gel processing of varistor powders
- 1 March 1992
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 7 (3) , 546-548
- https://doi.org/10.1557/jmr.1992.0546
Abstract
A new sol-gel method for the preparation of ZnO varistor powders, using inexpensive source materials such as acetates and nitrates, is described. It yields powders with a more homogeneous distribution of dopants compared to the commercially used mixed oxide technique. Varistor ceramics made from sol-gel powders can be sintered at lower temperatures and show improved electrical behavior. This is a consequence of formation of more varistor-active grain boundaries within the ceramics.Keywords
This publication has 8 references indexed in Scilit:
- Electrical properties of grain boundaries in polycrystalline compound semiconductorsSemiconductor Science and Technology, 1990
- Zino Oxide Varistors Made from Powders Prepared by Amine ProcessingJournal of the American Ceramic Society, 1989
- Metal Oxide VaristorsAnnual Review of Materials Science, 1987
- Different ‘‘single grain junctions’’ within a ZnO varistorJournal of Applied Physics, 1987
- Model experiments describing the microcontact of ZnO varistorsJournal of Applied Physics, 1985
- Theory of conduction in ZnO varistorsJournal of Applied Physics, 1979
- Direct determination of barrier voltage in ZnO varistorsJournal of Applied Physics, 1979
- Nonohmic Properties of Zinc Oxide CeramicsJapanese Journal of Applied Physics, 1971