Piezoelectric ceramic composition and piezoelectric ceramic device using the same

摘要

A piezoelectric ceramic composition mainly contains a component of the formula SrBi2Nb2O9 and includes Si in a proportion of more than 0 mol and equal to or less than about 0.3 mol relative to 1 mol of Bi in the main component of the formula. This piezoelectric ceramic composition can be fired at lower temperatures, exhibits a practicable electromechanical coefficient kt even when fired at firing temperatures of 1100 ° C. or less, and is useful as materials for piezoelectric ceramic filters, piezoelectric ceramic oscillators, piezoelectric ceramic resonators, and other piezoelectric ceramic devices. By using the piezoelectric ceramic composition, satisfactory piezoelectric ceramics can be obtained.