Semiconductor ceramic composition, method for producing the same, and PTC element

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United States of America Patent

PATENT NO 9190194
APP PUB NO 20150109094A1
SERIAL NO

14395568

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Abstract

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Provided is a semiconductor ceramic composition that is a lead-free semiconductor ceramic composition in which a portion of Ba in a BaTiO3-based oxide is substituted by Bi and A (in which A is at least one kind of Na, Li and K), the semiconductor ceramic composition having a region between a center portion and an outer shell portion within a crystal grain, in which when Bi concentration is measured in a radial direction within the crystal grain, the Bi concentration in the region is higher than both Bi concentration in the center portion and Bi concentration in the outer shell portion.

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Patent Owner(s)

  • HITACHI METALS, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ino, Kentaro Osaka, JP 14 15
Shimada, Takeshi Osaka, JP 75 758
Ueda, Itaru Osaka, JP 5 19

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