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Title: The first synthesis of chem-prep varistor LAC (lightning arrestor connector) granules

Abstract

ZnO variestor granules are the active medis for many lightning arrestor connectors (LACs). The 150 to 200 micron diameter granules provide a controlled electrical breakdown in the 400 micron gap between the electrically conductive pin and web of the connector. Tradiationally, the varistor granules are made from commercially available, reagent grade, mixed oxide powders that range in particle size from 1 to 20 microns. For the first time, we have synthesized varistor granules from chemically prepared powders developed at Sandia. These chem-prep varistor powders are more homogeneous and much finer than the mixed oxide powders; the mean particle size of the chem-prep powders is approximately 0.06 microns. LAC granules were formed from chemically prepared powders by traditional ceramic processing techniques. Although the chem-prep granules were not as spherical as the mixed oxide granules, the chem-prep granules did meet present LAC component requirements for fast-rise breakdown voltage and insulation resistance. The insulation resistance of chem-prep granules for a 200 volt pin-to-web voltage was 100 times less than for mixed oxide granules; however, both types of granules had similar insulation resistance for a 250 volt pin-to-web voltage.

Authors:
; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (USA)
OSTI Identifier:
5180092
Report Number(s):
SAND-87-3112
ON: TI88008005
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; SEMICONDUCTOR RESISTORS; SYNTHESIS; LIGHTNING ARRESTERS; ZINC OXIDES; CHALCOGENIDES; ELECTRICAL EQUIPMENT; EQUIPMENT; OXIDES; OXYGEN COMPOUNDS; RESISTORS; SEMICONDUCTOR DEVICES; ZINC COMPOUNDS; 420800* - Engineering- Electronic Circuits & Devices- (-1989)

Citation Formats

Tuttle, B A, Voigt, J A, and Andrews, L A. The first synthesis of chem-prep varistor LAC (lightning arrestor connector) granules. United States: N. p., 1988. Web.
Tuttle, B A, Voigt, J A, & Andrews, L A. The first synthesis of chem-prep varistor LAC (lightning arrestor connector) granules. United States.
Tuttle, B A, Voigt, J A, and Andrews, L A. 1988. "The first synthesis of chem-prep varistor LAC (lightning arrestor connector) granules". United States.
@article{osti_5180092,
title = {The first synthesis of chem-prep varistor LAC (lightning arrestor connector) granules},
author = {Tuttle, B A and Voigt, J A and Andrews, L A},
abstractNote = {ZnO variestor granules are the active medis for many lightning arrestor connectors (LACs). The 150 to 200 micron diameter granules provide a controlled electrical breakdown in the 400 micron gap between the electrically conductive pin and web of the connector. Tradiationally, the varistor granules are made from commercially available, reagent grade, mixed oxide powders that range in particle size from 1 to 20 microns. For the first time, we have synthesized varistor granules from chemically prepared powders developed at Sandia. These chem-prep varistor powders are more homogeneous and much finer than the mixed oxide powders; the mean particle size of the chem-prep powders is approximately 0.06 microns. LAC granules were formed from chemically prepared powders by traditional ceramic processing techniques. Although the chem-prep granules were not as spherical as the mixed oxide granules, the chem-prep granules did meet present LAC component requirements for fast-rise breakdown voltage and insulation resistance. The insulation resistance of chem-prep granules for a 200 volt pin-to-web voltage was 100 times less than for mixed oxide granules; however, both types of granules had similar insulation resistance for a 250 volt pin-to-web voltage.},
doi = {},
url = {https://www.osti.gov/biblio/5180092}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 1988},
month = {Tue Mar 01 00:00:00 EST 1988}
}

Technical Report:
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