Method of producing low temperature firing dielectric ceramic co

Details Method of producing low temperature firing dielectric ceramic co Method of producing low temperature firing dielectric ceramic co

1992-09-25

1994-03-08

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

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

501 32, 501138, C04B 3546

Patent

active

052926940

ABSTRACT:
A method of producing a dielectric ceramic composition is disclosed which includes the steps of: preparing a main ceramic composition comprising BaO, TiO, and RE.sub.2 O.sub.3 (where RE represents at least one rare earth metal) as major components; calcining a mixture of starting materials which give the main ceramic composition, at a temperature of 1050.degree. C. or higher, to provide a calcined mixture; finely pulverizing the calcined mixture to provide a calcined ceramic powder having an average grain size of not larger than 0.8 .mu.m; and adding, as at least a part of a secondary component, a B.sub.2 O.sub.3 powder or a glass powder containing B.sub.2 O.sub.3, to the main ceramic composition. Also disclosed are a dielectric resonator and dielectric filter using such a dielectric ceramic composition as produced according to the above method, and a method of producing such a dielectric resonator or filter.

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patent: 5073523 (1991-12-01), Yamada et al.
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Database WPIL Week 9006, Derwent Publications Ltd., London, GB; AN 90-037430 & DD-A-271 235 (VEB Elektronik Gera) Aug. 30, 1989.

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