Piezoelectric device, dust removing apparatus, and imaging apparatus

摘要

A piezoelectric device (5) includes an elastic member (1), an electrical-mechanical energy conversion element (2) fixed to the elastic member (1), configured to cause the elastic member (1) to generate vibration, and a supporting member (3) that supports the elastic member (1). The electrical-mechanical energy conversion element (2) is formed of a piezoelectric material in which, in a usage temperature range of the piezoelectric device (5), a piezoelectric constant decreases along with temperature rise. A supporting member (3) that supports the elastic member (1) is formed of a material in which, in the usage temperature range of the piezoelectric device (5), Q value increases along with temperature rise.