Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1979-10-29
1981-05-05
Vertiz, O. R.
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106 395, C04B 3546, C04B 3500, H01B 312
Patent
active
042656680
ABSTRACT:
A basic ceramic composition of high dielectric constant type ceramic composition comprises from 68.67 to 69.19% of PbO, from 3.67 to 4.09% of MgO, from 24.17 to 26.99% of Nb.sub.2 O.sub.5 and from 0.25 to 2.97% of TiO.sub.2, all percentages being by weight. Modified composition may comprise additive of Pb(Mn.sub.2/3 W.sub.1/3)O.sub.3, Pb(Mn.sub.1/3 Nb.sub.2/3)O.sub.3, Pb(Mn.sub.1/3 Ta.sub.2/3)O.sub.3, Pb(Mn.sub.1/2 W.sub.1/2)O.sub.3, MnO, and MgO. Modified composition may comprise Ba, Sr and Ca, which replace Pb of the basic ceramic composition. In a modified composition, the content of B site elements may be larger than that of A site element of an ABO.sub.3 crystal of the high dielectric constant type ceramic composition. A high dielectric constant, low dielectric loss, low temperature dependence of capacitance, high insulation resistance and a low sintering temperature are provided by the ceramic compositions of the present invention.
REFERENCES:
patent: 3472777 (1969-10-01), Brixner
patent: 3775531 (1973-11-01), Smith
patent: 4048546 (1977-09-01), Bouchard et al.
patent: 4061816 (1977-12-01), Kitamura
Fujiwara Shinobu
Furukawa Kiyoshi
Iizawa Osamu
Kikuchi Nobuaki
Tanaka Hitoshi
Bell Mark
TDK Electronics Co. Ltd.
Vertiz O. R.
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