Dielectric ceramic composition

Details Dielectric ceramic composition Dielectric ceramic composition

1986-05-07

1988-06-07

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

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

C04B 3546

Patent

active

047496690

ABSTRACT:
A dielectric ceramic composition comprising a ternary system composition represented by the formula, aBaO.bTiO.sub.2.cWO.sub.3 (wherein a, b and c are percent molar fractions totaling 100, i.e., a+b+c=100; 17.ltoreq.a.ltoreq.21.5; 75.ltoreq.b.ltoreq.83 and 0.1.ltoreq.c.ltoreq.5) and characterized by an advantageous properties, particularly, high dielectric constant, large Q and small .tau.f. In the compositions, TiO.sub.2 may be partially replaced by ZrO.sub.2 and, optionally, MnO may be also included up to 3 mole percent based on the total molar amount of the foregoing ingredients. The dielectric ceramic compositions are especially, but not exclusively, useful in microwave applications because of the foregoing advantages.

REFERENCES:
patent: 3195030 (1965-07-01), Herczog et al.
patent: 4621066 (1966-11-01), Nishigaki et al.
Nomura et al., Japanese Journal of Applied Physics, vol. 22, No. 7, Jul. 1983, pp. 1125-1128.

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