Pyroelectric and piezoelectric studies on BaTiO/sub 3/: silica glass composites

BaTiO/sub 3/:silica-glass composites were prepared in different weight ratios and their dielectric constant was studied over a wide temperature and frequency range. The results indicated that with increasing amounts of silica the dielectric constant of the composite goes on decreasing, while their Curie temperature increases. Pyroelectric current and charge field hysteresis effects were also studied in these composites. It was observed that the pyroelectric coefficient decreases from 238 mu C/m/sup 2/K to 200 mu C/m/sup 2/K as the percentage of glass in the composite is increased. The piezocoefficient d/sub 33/ also shows a decrease with increasing glass percentage but the piezovoltage coefficient peaks at 1% glass content.<
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