Compositions – Electrically conductive or emissive compositions – Metal compound containing
Patent
1986-11-14
1988-11-01
Dixon, Jr., William R.
Compositions
Electrically conductive or emissive compositions
Metal compound containing
252521, 501136, 501138, 501139, H01B 108, C04B 3546
Patent
active
047818590
ABSTRACT:
A voltage-dependent non-linear resistance ceramic composition comprises SrTiO.sub.3, Sr.sub.1-x Ba.sub.x TiO.sub.3 (0.001.ltoreq.x.ltoreq.0.300) or Sr.sub.1-x Ca.sub.x TiO.sub.3 (0.001.ltoreq.x.ltoreq.0.300) as host material and further includes 0.001-2.000 mol % of Y.sub.2 O.sub.3 as metal oxide for semiconductorization acceleration, 0.001-3.000 mol % of metal oxide(s) of at least one selected from the group consisting of Ca.sub.2 O.sub.3, CuO, Ag.sub.2 O, Al.sub.2 O.sub.3, ZrO.sub.2, Bao, SiO.sub.2, MgO, B.sub.2 O.sub.3, MnO.sub.2, NiO, MoO.sub.3 BeO, Fe.sub.2 O.sub.3, Li.sub.2 O, Cr.sub.2 O.sub.3, PbO, CaO, TiO.sub.2, P.sub.2 O.sub.5, Sb.sub.2 O.sub.3 and V.sub.2 O.sub.5, which segregates at grain boundary to make the grain boundary selectively to high resistances; an element made of the composition has both characteristics of capacitance and varistor, and is suitable for filter to remove noise or surge.
REFERENCES:
patent: 4438214 (1984-03-01), Masuyama et al.
patent: 4545929 (1985-10-01), Masuyama et al.
patent: 4547314 (1985-10-01), Masuyama et al.
Dixon Jr. William R.
Group Karl
Matsushita Electric - Industrial Co., Ltd.
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