Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1979-01-26
1980-09-16
Vertiz, O. R.
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106 732, 252 632, 252 635, 252520, C04B 3546
Patent
active
042227836
ABSTRACT:
Barium titanate series semiconductive ceramics having a positive temperature coefficient of electric resistance are disclosed. The ceramics consist mainly of a barium titanate series compound and contain specifically limited small amounts of titanium dioxide, silicon oxide, aluminum oxide, at least one element selected from the group consisting of rare earth elements, yttrium, bismuth, antimony, niobium, tantalum and tungsten, at least one element selected from the group consisting of manganese, copper, iron and chromium, and zinc oxide. The ceramics are low in the variance of electric resistance values and have a low water absorption and hence are low in the change of electric properties due to the lapse of time.
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Atsumi Senji
Wada Shigetaka
Bell Mark
NGK Insulators Ltd.
Vertiz O. R.
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