Capacitor and dielectric ceramic powder based upon a barium borate and zinc silicate dual-component sintering flux
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United States of America Patent
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Jun 26, 2001
Grant Date -
N/A
app pub date -
Dec 31, 1998
filing date -
Dec 31, 1998
priority date (Note) -
Expired
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Abstract
Temperature compensating capacitors and dielectric ceramic powder compositions therefor are disclosed, based upon a dual-component barium borate and zinc silicate sintering flux. The precursor dielectric ceramic powders can include (1-m) BaTiO.sub.3 +(m) CaZrO.sub.3 (BTCZ composition), with m ranging from 20 mole percent to 35 mole percent, xBaO.yTiO.sub.2.zRE.sub.2 O.sub.3 (rare earth composition), (RE being a rare earth metal), with x ranging from 0 m % to 30 m %, y ranging from 45 m % to 95 m %, and z ranging from 5 m % to 50 m %, or a combination of the BTCZ and rare earth composition in varying weight percents. The effective range of B.sub.2 O.sub.3 in the barium borate ranges from 0.029 w % to 2.75 w % of the total dielectric composition, whereas the effective range of SiO.sub.2 in the zinc silicate ranges from 0.08 w % to 1.42 w % of the total dielectric composition.
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