Piezoelectric ceramic, vibrator and ultrasonic motor

摘要

Provided is a piezoelectric ceramic (1) containing as a main component a compound represented by formula (1) and further containing at least one element selected from Mn, Fe and Cu in an amount of 0.04 to 0.6% by mass based on the main component, and a vibrator (10) having the piezoelectric ceramic (1) and electrodes (2,3).
Ca x Ba 1-x TiO 3 ... (1)
where x satisfies 0.05 ‰¤ x ‰¤ 0.20.