Piezoelectric, dielectric and pyroelectric properties of 0-3 ceramic-polymer composites

Abstract

The circular samples of composites were made from PZT ceramic grains dispersed in polymers (epoxy or rubber). Pressure dependencies of the hydrostatic piezoelectric coefficient d_h and permittivity ε were measured in the range up to 60 MPa. The hydrostatic strain coefficient d_h, the hydrostatic voltage coefficient g_h and figure of merit d_h.g_h were determined using the static method. The pressure dependence of the hydrostatic coefficients was measured for several successive cycles. Experimental dependence of the charge on pressure and temperature was fitted by multi parameter function. The pressure and temperature dependencies of the hydrostatic d_h and pyroelectric p₃ coefficients were determined. It was found that the hydrostatic strain coefficient d_h and hydrostatic voltage coefficient g_h decreased and pyroelectric coefficient p₃ increased with pressure at constant temperature.

Keywords:

• Piezoelectric hydrostatic coefficients
• 0-3 PZT-polymer composites