Compositions – Piezoelectric
Patent
1999-05-26
2000-09-12
Koslow, C. Melissa
Compositions
Piezoelectric
501134, 310322, 310366, 310365, C04B 35499, C04B 35472, H01L 41187, H01L 4108
Patent
active
06117355&
ABSTRACT:
Provided is a piezoelectric ceramic composition containing a lead titanate which has excellent temperature stability of the resonance frequency, and is suitable for application in a filter, a vibrator or the like, and a piezoelectric element using the piezoelectric ceramic composition. A piezoelectric substrate comprising a ceramic material containing PbTiO.sub.3 is provided with vibrating electrodes on the front and rear surfaces. The ceramic material containing PbTiO.sub.3 contains not less than about 0.1% by weight or more than about 3.0% by weight of Mn based on MnCO.sub.3 as the subcomponent in the main component having a composition satisfying 0.02.ltoreq.x.ltoreq.0.16 and 0.15.ltoreq.y.ltoreq.0.50 of the general formula Pb.sub.1-1.5x Nd.sub.x [(In.sub.1/2 Nb.sub.1/2).sub.y Ti.sub.1-y ]O.sub.3.
REFERENCES:
patent: 4511483 (1985-04-01), Ogawa et al.
JP 57048280 A (Murata Mfg. Co. Ltd.) Mar. 19, 1982 (abstract) World Patents Index [online] London, U.K.: Derwent Publications, Ltd. Retrieved from WPI/Derwent. DW 198217, Accession No. 1982-34193E.
Ando Akira
Hayashi Koichi
Horikawa Katsuhiro
Yoshizawa Isamu
Koslow C. Melissa
Murata Manufacturing Co. Ltd.
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