Process for the chemical preparation of high-field ZnO varistors
Abstract
Chemical preparation techniques involving co-precipitation of metals are used to provide micro-structural characteristics necessary in order to produce ZnO varistors and their precursors for high field applications. The varistors produced have homogeneous and/or uniform dopant distributions and a submicron average grain size with a narrow size distribution. Precursor powders are prepared via chemical precipitation techniques and varistors made by sintering uniaxially and/or isostatically pressed pellets. Using these methods, varistors were made which were suitable for high-power applications, having values of breakdown field, E.sub.B, in the 10-100 kV/cm range, .alpha.>30 and densities in the range of 65-99% of theoretical, depending on both composition and sintering temperature.
- Inventors:
-
- Tijeras, NM
- Albuquerque, NM
- Issue Date:
- Research Org.:
- AT&T
- OSTI Identifier:
- 866313
- Patent Number(s):
- 4681717
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
- DOE Contract Number:
- AC04-76DP00789
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- process; chemical; preparation; high-field; zno; varistors; techniques; involving; co-precipitation; metals; provide; micro-structural; characteristics; produce; precursors; field; applications; produced; homogeneous; uniform; dopant; distributions; submicron; average; grain; size; narrow; distribution; precursor; powders; prepared; via; precipitation; sintering; uniaxially; isostatically; pressed; pellets; methods; suitable; high-power; values; breakdown; 10-100; kv; cm; range; alpha; 30; densities; 65-99; theoretical; depending; composition; temperature; narrow size; average grain; structural characteristics; size distribution; grain size; precursor powder; precursor powders; isostatically pressed; sintering temperature; field applications; chemical preparation; zno varistors; via chemical; power applications; prepared via; /264/252/
Citation Formats
Brooks, Robert A, Dosch, Robert G, and Tuttle, Bruce A. Process for the chemical preparation of high-field ZnO varistors. United States: N. p., 1987.
Web.
Brooks, Robert A, Dosch, Robert G, & Tuttle, Bruce A. Process for the chemical preparation of high-field ZnO varistors. United States.
Brooks, Robert A, Dosch, Robert G, and Tuttle, Bruce A. Thu .
"Process for the chemical preparation of high-field ZnO varistors". United States. https://www.osti.gov/servlets/purl/866313.
@article{osti_866313,
title = {Process for the chemical preparation of high-field ZnO varistors},
author = {Brooks, Robert A and Dosch, Robert G and Tuttle, Bruce A},
abstractNote = {Chemical preparation techniques involving co-precipitation of metals are used to provide micro-structural characteristics necessary in order to produce ZnO varistors and their precursors for high field applications. The varistors produced have homogeneous and/or uniform dopant distributions and a submicron average grain size with a narrow size distribution. Precursor powders are prepared via chemical precipitation techniques and varistors made by sintering uniaxially and/or isostatically pressed pellets. Using these methods, varistors were made which were suitable for high-power applications, having values of breakdown field, E.sub.B, in the 10-100 kV/cm range, .alpha.>30 and densities in the range of 65-99% of theoretical, depending on both composition and sintering temperature.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1987},
month = {Thu Jan 01 00:00:00 EST 1987}
}