The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 2013
Filed:
Feb. 18, 2010
Yasuyuki Okimura, Inuyama, JP;
Shinji Ban, Gifu, JP;
Hiroshi Watanbe, Komaki, JP;
Takeshi Mitsuoka, Konan, JP;
Yasuyuki Okimura, Inuyama, JP;
Shinji Ban, Gifu, JP;
Hiroshi Watanbe, Komaki, JP;
Takeshi Mitsuoka, Konan, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A sintered electroconductive oxide forming a thermistor element has a first crystal phase having a composition represented by RE1AlOand a second crystal phase having a perovskite structure represented by (RE2SL)MO. The factor a of the second crystal phase is: 0.18<a<0.50, wherein RE1 represents at least one of Yb and Lu and at least one species selected from among group 3A elements excluding Yb, Lu, and La; RE2 represents at least one species selected from among group 3A elements excluding La and which contains at least one species selected from the group RE1; M represents Al and at least one species selected from group 4A to 7A, and 8 elements; and SL represents Sr, Ca, and Mg, with at least Sr being included at a predominant proportion by mole.