Patent ID: 9697935
Date: 2017-07-04
CPC Classifications: C04B,H01C

Claim:
1. A PTC thermistor ceramic composition, comprising a sintered body comprising a barium titanate based compound represented by the following formula (1) as the main component, wherein, in the formula (1), A represents at least one element selected from the group consisting of Na and K, RE represents at least one element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy and Er, TM represents at least one element selected from the group consisting of V, Nb and Ta, and w, x, y, z and α satisfy the following in equations (2) to (5), in which, the units of w, x, y and z are all mole, and a represents the molar ratio of Ba site to Ti site, Ca is further contained in a ratio of 0.01 mol or more and less than 0.05 mol relative to 1 mol of Ti site in terms of element.