Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Patent
1985-11-26
1988-05-17
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
501135, 501139, C04B 3546, C04B 3500
Patent
active
047450932
ABSTRACT:
Disclosed is a dielectric ceramic material having a chemical composition represented by the formula Sr(Ni.sub.1/3 Nb.sub.2/3)O.sub.3 or (1-x)Sr(Ni.sub.1/3 Nb.sub.2/3)O.sub.3.xBaTiO.sub.3 in which x is a positive number of up to 0.3 and also having a perovskite structure. This dielectric material has a small dielectric loss and a large dielectric constant, and the temperature coefficient of the resonance frequency can be controlled to a small value within a certain range. The dielectric ceramic material is valuably used for microwave dielectric ceramics.
REFERENCES:
patent: 3775142 (1973-11-01), Roup
patent: 4585745 (1986-04-01), Tunooka et al.
patent: 4593008 (1986-06-01), Okawa et al.
Okawa Takashi
Yokoe Nobuo
Bell Mark L.
Group Karl
Kyocera Corporation
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