Dielectric ceramic composition

Details Dielectric ceramic composition Dielectric ceramic composition

1990-02-21

1991-01-15

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

501134, 252 629, C04B 3546, C04B 3548

Patent

active

049853813

ABSTRACT:
A dielectric ceramic composition consists essentially of a basic composition of a ternary system, Pb(Mg.sub.1/2 W.sub.1/2)O.sub.3 -PbTiO.sub.3 -PbZrO.sub.3, and 0.05 to 6.5 wt % of an antireducing agent incorporated therein. The basic composition comprises a main component represented by the general formula: xPb(Mg.sub.1/2 ; W.sub.1/2)O.sub.3 -yPbTiO.sub.3 -zPbZrO.sub.3 wherein x, y and z are mole percentages of the respective components, and 0.3 to 2.0 wt % of ZnO contained therein. The main component has a composition falling within the area of a polygen ABCD defined by points A(52.0, 44.0, 4.0), B(47.0, 38.3, 15.0), C(44.0, 40.0, 16.0), D(49.0, 46.0, 5.0) in the attached figure. The antireducing agent has a composition expressed by the general formula:

REFERENCES:
patent: 4582814 (1986-04-01), Thomas
patent: 4744972 (1988-05-01), Ogata et al.

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