DIELECTRIC AND PIEZOELECTRIC BEHAVIORS OF 0-3 PIEZOELECTRICCERAMIC/ SULPHOALUMINATE CEMENT COMPOSITES

0-3 cement based piezoelect ric composites were fabricated by compressing technique using PMN andsulphoaluminate cement as raw materials. The piezoelect ric and dielect ric properties of the composites were investigated. The result s indicate that the dielect ric constant s of the composites are almost constant over the temperatureranges between - 30 ℃and 150 ℃, which exhibit s good dielect ric-temperature stability. But dielect ric dissipation increases as temperature increases. With increasing PMN content , the piezoelect ric and dielect ric properties of thecomposites increase. The bet ter performances of the composites are exhibited when PZT content exceeds 70 %.