Dielectric ceramic composition

Details Dielectric ceramic composition Dielectric ceramic composition

1997-06-13

1998-09-01

Jones, Deborah

Compositions: ceramic

Ceramic compositions

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

501137, C04B 35468

Patent

active

058011129

ABSTRACT:
A dielectric ceramic composition being characterized in that the composition contains at least Ba and Ti as metal elements, and when the formula of the composition in accordance with the mole ratios of these elements is represented by BaO.xTiO.sub.2, the composition contains the main ingredient determined by x satisfying the relationship of 3.9.ltoreq.x.ltoreq.4.1, and 0.01 to 7 weight parts of Cu in terms of CuO, and, if necessary, 20 or less weight parts of Zn in terms of ZnO with respect to 100 weight parts of the main ingredient, whereby the dielectric coefficient can have a value in the range of 30 to 42, and Qf can have a value of 40000 GHz or more, the temperature coefficient .pi..sub.f of the resonance frequency can have a value in the range of -15 to +15 ppm/.degree.C., and the temperature drift .DELTA..pi..sub.f of the temperature coefficient .pi..sub.f of the resonance frequency can have a value in the range of -2 to +2 ppm/.degree.C.

REFERENCES:
patent: 4739544 (1988-04-01), Okazaki et al.
patent: 4987107 (1991-01-01), Narumi et al.
patent: 5296424 (1994-03-01), Wang et al.

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