Piezoelectric ceramic compositions

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H - Electricity

01

L

31/138, 356/200

H01L 41/18 (2006.01) C04B 35/46 (2006.01) C04B 35/48 (2006.01) C04B 35/50 (2006.01) C04B 35/51 (2006.01) H01G 7/02 (2006.01)

Patent

CA 1040847

ABSTRACT OF THE DISCLOSURE The present invention relates to a piezoelectric ceramic composition of a solid solution of a material, Pb (Sn1/3Nb2/3)xTiyZrzO3, wherein 0.01?x?0.25, 0?y?0.75, 0?z?0.875 and x+y+z=1, which further contains a quantity of cobalt equivalent to from 0.1 to 3 weight percent of cobalt oxide (CoO). This ceramic has a high mechanical quality factor, high stability of resonant frequency over wide temperature range and high stability of capacitance ratio over a wide time range.

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