High field strength varistor material

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United States of America Patent

PATENT NO 9672964
APP PUB NO 20110079755A1
SERIAL NO

12894755

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Abstract

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The present invention relates to a varistor material for a surge arrester with target switching field strength ranging from 250 to 400 V/mm comprising ZnO forming a ZnO phase and Bi expressed as Bi2O3 forming an intergranular bismuth oxide phase, said varistor material further comprising a spinel phase, characterized in that the amount of a pyrochlore phase comprised in the varistor material is such, that the ratio of the pyrochlore phase to the spinel phase is less than 0.15:1.

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Patent Owner(s)

  • ABB SCHWEIZ AG;ABB TECHNOLOGY AG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beck, Oliver Wettingen, CH 10 94
Greuter, Felix Baden-Ruetihof, CH 40 564
Hagemeister, Michael Zurich, CH 8 129
Kessler, Reto Zurich, CH 8 149
Osterlund, Ragnar Ludvika, SE 3 2

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