Dielectric ceramic of BaO-TiO.sub.2 and SnO.sub.2
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United States of America Patent
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Oct 22, 1985
Issued Date -
N/A
app pub date -
Dec 10, 1984
filing date -
Oct 28, 1981
priority date (Note) -
Expired
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Abstract
The components, of a microwave circuit, such as a filter, and a solid oscillator, etc. consists of a dielectric ceramic composition. A known BaO-TiO.sub.2 compound exhibits properties which make it suitable for use as the components of a microwave circuit but the resonance frequency linearity and the resonance frequency temperature coefficient are not excellent. The dielectric ceramic composition of the present invention is expressed by the formula of BaO.x{(1-y)TiO.sub.2.ySnO.sub.2 }, wherein x is 4.4 moles and y is from 0.06 to 0.09 mole, and has a mixed crystal structure of Ba(Ti.Sn).sub.4 O.sub.9 and Ba.sub.2 (Ti.Sn).sub.9 O.sub.20.
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