Ceramic material, method for producing the ceramic material, and resistor component comprising the ceramic material
AssigneeEpcos AG
InventorsBernhard Steinberger, Werner Kahr, Jan Ihle
Life of this patent
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Abstract
A ceramic material has the following composition: (Ba1-xMnx)O.z(Ti1-yMmy)O2.Dd.Ee. In this composition, (Ba1-xMnx)=A and (Ti1-yMmy)=B, where Mn stands for at least one element selected from: Mg, Ca, Sr, Pb and mixtures thereof; Mm stands for at least one element selected from: Sn, Zr and mixtures thereof; D stands for at least one element having donor properties; E stands for at least one element having acceptor properties. The following applies for the parameters: 0≦x≦0.6; 0≦y≦0.35; 0≦d≦0.02; 0≦e≦0.02; 1<z; and the following applies for the molar ratio of B to A: 1<B/A. The ceramic material comprises Si only as an impurity.
Claims9
A resistor component comprising a ceramic material having the following composition:
- (Ba1-xMnx)O.z(Ti1-yMmy)O2.Dd.Ee
- with (Ba1-xMnx)=A and (Ti1-yMmy)=B, wherein
- Mn stands for at least one element selected from the group consisting of Mg, Ca, Sr, and Pb and mixtures thereof;
- Mm stands for at least one element selected from the group consisting of Sn and Zr and mixtures thereof;
- D stands for at least one element selected from:
- Nb, Y, Sb or an element from the lanthanide group and mixtures thereof;
- E stands for at least one element selected from:
- Mn, Fe, Ni, Co, Cu and mixtures thereof;
- wherein the parameters satisfy:
- 0≦x≦0.6;
- 0≦y≦0.35;
- 0≦d≦0.02;
- 0≦e≦0.02;
- 1<z;
- and a molar ratio of B to A satisfies:
- 1<B/A, and
- wherein the ceramic material comprises at most 0.05 mol% Si, wherein Mn at least partially stands for Ca, and Ca has a minimum content of 10 mol% in A, and wherein the resistor component comprising the ceramic material has a positive temperature coefficient.
Dependencies are inferred from the claim text.