Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Patent
1992-07-15
1993-06-15
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
501126, C04B 3500
Patent
active
052198081
ABSTRACT:
The present invention provides a composition of dielectric ceramic composition to be used in the frequency region of microwaves.
The composition contains lead oxide, calcium oxide, iron, oxide, tantalum oxide and niobium oxide, and is represented by (Pb.sub.1-x Ca.sub.x).sub.1+a {Fe.sub.178 (Ta.sub.1-y Nb.sub.y).sub.178 }O.sub.3+a wherein x, y and a satisfy, respectively, 0.44.ltoreq.x.ltoreq.0.63, 0.0.ltoreq.y.ltoreq.1.0 and 0.0.ltoreq.a.ltoreq.0.08.
REFERENCES:
patent: 4216102 (1980-08-01), Furukawa et al.
patent: 4216103 (1980-08-01), Fujiwara et al.
patent: 4330631 (1982-05-01), Kawashima et al.
Wakino et al., Microwave Characteristics of (Zr, Sn)TiO.sub.4 and BaO-PbO-Nd.sub.2 O.sub.3 -TiO.sub.2 Dielectric Resonators, Journal of the American Ceramic Society, JACTAW, vol. 67, No. 4, pp. 278-281 (Apr. 1984).
Kagata Hiroshi
Kato Jun-ichi
Nishimoto Keiji
Bell Mark L.
Jones Deborah
Matsushita Electric - Industrial Co., Ltd.
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