Dielectric ceramic composition used for producing dielectric res

Details Dielectric ceramic composition used for producing dielectric res Dielectric ceramic composition used for producing dielectric res

1992-11-03

1994-03-01

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

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

501137, 501138, C04B 3546

Patent

active

052907406

ABSTRACT:
A dielectric ceramic composition is disclosed which includes: a main ceramic composition of barium oxide and titanium oxide, or barium oxide, titanium oxide and at least one of strontium oxide, calcium oxide, zirconia and zinc oxide, which composition is represented by (1-a-b)BaO.aSrO.bCaO.x[(1-c)TiO.sub.2.cZrO.sub.2 ].yZnO, where 3.1.ltoreq.x.ltoreq.5.4, 0.ltoreq.y.ltoreq.2.9, 0.ltoreq.a+b.ltoreq.0.4, 0.ltoreq.c.ltoreq.0.2; and a secondary component at least a part of which consists of a B.sub.2 O.sub.3 material or a glass material containing as one of glass components, the secondary component being added to the main ceramic composition, in an amount of 0.1-7.5 parts by weight of B.sub.2 O.sub.3 per 100 parts by weight of the main ceramic composition. Also disclosed are a method of preparing such a dielectric ceramic composition, a dielectric resonator for microwave application which uses the dielectric ceramic composition, or a dielectric filter having a plurality of such dielectric resonators, and a method of producing the dielectric resonator or dielectric filter.

REFERENCES:
patent: 3938064 (1976-02-01), O'Bryan, Jr. et al.
patent: 4222783 (1980-09-01), Atsumi et al.
patent: 4335216 (1982-06-01), Hodgkins et al.
patent: 4610968 (1986-09-01), Wada et al.
patent: 4610971 (1986-09-01), Wada et al.
patent: 4999737 (1991-03-01), Kishi et al.

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