Dielectric ceramic of BaO-TiO.sub.2 and SnO.sub.2

Details Dielectric ceramic of BaO-TiO.sub.2 and SnO.sub.2 Dielectric ceramic of BaO-TiO.sub.2 and SnO.sub.2

1984-12-10

1985-10-22

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

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

333204, 361322, C04B 3546

Patent

active

045489106

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.

REFERENCES:
patent: 3938064 (1976-02-01), O'Bryan et al.
patent: 4337446 (1982-06-01), O'Bryan et al.
patent: 4338403 (1982-07-01), Kawashima et al.
patent: 4353047 (1982-10-01), Noguchi et al.
O'Bryan, H. M. et al., J. Am Cer Soc., Discussions and Notes, Oct. 1974, pp. 450-453.
Jonker, G. H. et al., "The Ternary Systems BaO-TiO.sub.2 -SnO.sub.2 and BaO-TiO.sub.2 -ZrO.sub.2 " J. Amer. Cer. Soc. 41, (1958) pp. 390-394.

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