New Method for Measuring Mechanical Vibration Loss and Dielectric Loss of Piezoelectric Transducer under High-Power Excitation

In the Pb(Zr, Ti)O 3 group ceramics, the dielectric loss becomes larger than the mechanical vibration loss under high-power excitation. In this paper, a new advanced method for measuring these losses separately and simultaneously is described. The two-step differential circuits, is utilized. By adjusting the differential circuits, the dielectric loss and the damped capacitance are obtained. The resonance circuit constants under high-power excitation are obtained after adjusting the differential circuit