Method of manufacturing piezoelectric ceramics, piezoelectric ceramics, piezoelectric element, ultrasonic motor, optical apparatus, dust removing device, image pickup apparatus, ultrasonic probe, ultrasonic diagnostic apparatus, and electronic apparatus

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United States of America

PATENT NO 12193332
APP PUB NO 20210328131A1
SERIAL NO

17222120

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Abstract

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Provided are a piezoelectric ceramics which does not contain lead, has small temperature dependence of a piezoelectric constant within an operating temperature range, and has high density, a high mechanical quality factor, a satisfactory piezoelectric constant, and a small surface roughness, and a method of manufacturing the piezoelectric ceramics. The method of manufacturing a piezoelectric ceramics is characterized by including: sintering a compact containing a raw material at 1,000° C. or more to obtain a sintered compact; abrading the sintered compact; and annealing the abraded sintered compact at a temperature of 800° C. or more and less than 1,000° C.

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Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHATOKYO 146-8501

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Furuta, Tatsuo Tokyo, JP 101 448
Matsuda, Takanori Tokyo, JP 98 805
Uebayashi, Akira Tokyo, JP 31 67
Yabuta, Hisato Tokyo, JP 64 18000

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