The hydrostatic piezoelectric coefficients of PbTiO3/PVDF composites with 0-3 connectivity determined at the high pressure range

The hydrostatic piezoelectric coefficients of piezoelectric composites with 0-3 connectivity were measured. Composites were made from lead titanate PbTiO3 and PVDF polymers as thin circle samples using hot pressing technique. The samples were pooling in electrical field at higher temperature. The hydrostatic strain coefficient db, the hydrostatic voltage coefficient gh and figure of merit d(h.gh) were determined using the static D.C. technique inside the high pressure chamber. The pressure range was 0 to 60 MPa. The samples were kept under an adjusting static pressure from the hydraulic press. The charge produced by the samples was measured on a Keithley 6517 Electrometer. The coefficient db is a proportional amount of the measured charge. The dependences of hydrostatic piezoelectric coefficients on high pressure are reported.