PTC semiconductor ceramic composition, PTC semiconductor ceramic and methods for its manufacture, as well as PTC thermistor and use

Abstract

PTC semiconductor ceramic composition, wherein the PTC semiconductor ceramic composition comprises a BaTiO3-based compound according to the following formula (I) as the main component: [Ba1-(c+s)p(BicBs)pCau][Tit-a-mAaMnm]O3+z(I) where B is at least one element from the group of alkali metals, where A is at least one element selected from the group consisting of V, Nb and Ta, and where the variables c, s, p, u, t, a, m and z are defined as follows and expressed in mol: 0.4 <c<0,60,5<s<1,00,1<p<0,20≤u<0,010,9889<t<1,030<a<0,0060≤m<0,0010<z<0,07;wobei s > c applies; and wherein the PTC semiconductor ceramic composition comprises: v mol Si, w mol S and x mol Y, where the variables v, w and x are defined as follows: v=0 w=0 x=0; where v, w and x are based on 1 mol of the Ba site of the BaTiO3-based compound according to formula (I).

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