Calculation of piezoelectric transducers based on MIM structures

The conditions for optimal excitation of piezoceramic transducers are determined from the equality of the bias and conduction currents in a metal-polar insulator-metal (MIM) structure under an external electric field. Charge-carrier injection from the cathode is shown to affect the electric field strength distribution along the thickness of the insulator and the integral characteristic, i.e., the capacitance of thin-layer structures. Numerical computation indicates that in the case of piezoceramic plates 0.4–0.5 mm thick electron emission from the cathode is possible at voltages of 5–8 V.Translated from Izmeritel'naya Tekhnika, No. 2, pp. 50–54, February, 1995.