Ptc semiconductor ceramic composition, method for producing the semiconductor ceramic and heating device and use

Abstract

A semiconductor ceramic composition may include, as a main component, a BaTiO3-based compound according to the formula [BabCacSrsPbpRx][TitAaMnm]O3+z. R may represent at least one element selected from a group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb. A may represent at least one element selected from a group consisting of V, Nb, and Ta. The variables b, c, s, p, x, t, a, m, and z may be defined as: b=1−c−s−p−x; 0<c+s+p<0.51; 0.490<b<0.999; 0.0<c<0.5; 0.0<s<0.5; 0.05<p<0.5; 0.001<x<0.01; 1.0001<(t+a+m)<1.011575; 0.9889<t<1.000375; 0.00010<a<0.0012; 0.0001<m<0.01; and 0.0001<z<0.01.

Dependencies are inferred from the claim text.