Dielectric compositions

Details Dielectric compositions Dielectric compositions

1986-10-20

1988-02-09

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

29 2542, 252521, 501136, H01G 412, H01G 700, C04B 3546

Patent

active

047245115

ABSTRACT:
A dielectric composition comprising a base of non-stoichiometric lead magnesium niobate, non-stoichiometric lead zinc niobate, lead zirconate, titanium dioxide and bismuth titanate, together with a further oxide additive, in particular nickel oxide, manganese oxide, cobalt oxide or a rare earth, has a low firing temperature (900.degree.-1000.degree. C.), high dielectric constant (up to 14,750), low tan .delta.(<2.5% at 20.degree. C.) and Z5U temperature coefficient of capacitance.

REFERENCES:
patent: 3670216 (1972-06-01), Masuyama et al.
patent: 4160748 (1979-07-01), Yodogawa et al.
patent: 4338403 (1982-07-01), Kawashima et al.
patent: 4482935 (1984-11-01), Wheeler
patent: 4490318 (1984-12-01), Masuyama et al.
patent: 4506026 (1985-03-01), Hodgkins et al.
patent: 4525768 (1985-06-01), Wheeler
patent: 4536821 (1985-08-01), Wheeler et al.

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