Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1991-02-05
1992-03-03
Griffin, Donald A.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
501136, H01G 410, C04B 3546
Patent
active
050937570
ABSTRACT:
The invention relates to a dielectric ceramic composition that can be baked in a short time in the atmosphere, neutral atmosphere or reducing atmosphere at baking temperature of 800.degree. to 1000.degree. C. In the ceramic components expressed by PbTi.sub.X (Mg.sub.1/2 Nb.sub.2/3).sub.Y (Ni.sub.1/2 W.sub.1/2)ZO.sub.3 (where X+Y+Z=1), PbO is added by 1.0 to 25.0 mol % and NiO by 1.0 to 15.0 mol % as subsidiary components, to the temporarily baked powder of the main component dielectric ceramic composition composed in the pentagonal region having the vertices at compositions A, B, C, D, E expressed by numerical values in the following square brackets, in the system of trigonometric coordinates having the vertices at PbTiO.sub.3, Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 and Pb(Ni.sub.1/2 W.sub.1/2)O.sub.3,
REFERENCES:
patent: 4339544 (1982-07-01), Sakabe et al.
patent: 4711862 (1987-12-01), Yokotani et al.
Guha et al., Effect of Excess PbO on the Sintering Characteristics and Dielectric Properties of Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 PbTiO.sub.3 Based Ceramics, J. Am. Ceramic Society, Mar. 1988.
Ishikawa Mariko
Kawakita Kouji
Kimura Suzushi
Okinaka Hideyuki
Yokotani Youichiro
Griffin Donald A.
Matsushita Electric - Industrial Co., Ltd.
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