Temperature characteristics for multilayer piezoelectric ceramic actuator

Temperature characteristics for multilayer piezoelectric ceramic actuator have been investigated. Thermal expansion coefficient with DC 150 V application is negative, -6×10 -6 /°C, at 20°C. Between 0°C and 100°C, an available net displacement under DC 150 V is less changed, within 5%. Temperature rise and dissipation power due to dielectric loss were observed while driving at 0.3∼1.5 kHz. They are about 70°C and 0.7 J/sec at 1.5 kHz, with 150V peak voltage, respectively. The results suggest that a main origin for a temperature rise is dielectric loss.