PIEZOELECTRIC PROPERTIES OF 0-3 SULPHOALUMINATE CEMENT-BASED PIEZOELECTRIC COMPOSITES

The 0-3 sulphoaluminate cement-based piezoelectric composites were fabricated by compressing technique.The effects of contents of PZT and poling conditions on piezoelectric properties of the composites were discussed.The results show that the piezoelectric properties of composites are improved by increasing the poling field E and poling time t.For the 0-3 sulphoaluminate cement-based piezoelectric composites,the optimum poling field E and poling time t are 4.0 kV/mm and 45 min respectively.The piezoelectric constant d₃₃, g₃₃ and the electromechanical coupling coefficient K_</em>P,K_t of the composites increase rapidly with the increasing of PZT contents. When the content of PZT reaches 85%, K_P and K_t are 28.54% and 28.19% respectively.