04222783 is referenced by 20 patents and cites 8 patents.

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.

Title
Barium titanate series ceramics having a positive temperature coefficient of electric resistance
Application Number
6/6842
Publication Number
4222783
Application Date
January 26, 1979
Publication Date
September 16, 1980
Inventor
Shigetaka Wada
Kuwana
JP
Senji Atsumi
Kagamihara
JP
Agent
Stevens Davis Miller & Mosher
Assignee
NGK Insulators
JP
IPC
C04B 35/46
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