Piezoelectric composition, piezoelectric ceramic, transducer, and ultrasonic motor
View Patent ↗A piezoelectric composition includes a compound represented by a general expression Bi 4 Ti 3 O 12 —SrBi 4 Ti 4 O 15 as a main component; and Mn or a Mn compound as an additive. A Mn content is less than 1.0% by mass based on a main component amount.
1. A piezoelectric composition comprising:
a compound represented by a general expression Bi 4 Ti 3 O 12 —SrBi 4 Ti 4 O 15 as a main component; and
Mn or a Mn compound as an additive, wherein
a Mn content is less than 1.0% by mass based on a main component amount.
2. The piezoelectric composition according to claim 1 , wherein 40 mol % or less of the SrBi 4 Ti 4 O 15 is substituted with BaBi 4 Ti 4 O 15 .
3. A piezoelectric ceramic which is manufactured by using the piezoelectric composition according to claim 1 and of which mechanical quality factor is 1000 or more.
4. A transducer comprising:
the piezoelectric ceramic according to claim 3 ; and
an electrode.
5. An ultrasonic motor comprising the transducer according to claim 4 .