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:
Oct. 18, 2016
Filed:
Jun. 26, 2015
Tdk Corporation, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
A semiconductor ceramic composition with small resistivity at room temperature and large temperature coefficient of resistance is provided; the composition is represented by formula,(BaBiARE)(TiTM)O  (1),(wherein, A is at least one element from Na or K, RE is at least one element from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy and Er, TM is at least one element from the group consisting of V, Nb and Ta, and w, x, y, z (each in mol) and the mole ratio m of Ba site to Ti site satisfy the following in equations,0.007≦≦0.125  (2)≦2.0  (3)0≦()≦0.010  (4)0.940≦≦0.999  (5)),and further includes Sr in a proportion of 0.010 mol or more and 0.050 mol or less relative to 1 mol of Ti site, and the mole ratio u of Sr and the mole ratio x of Bi satisfy the following in equation,≦1.8−0.008  (6).