Dielectric frequency and ferroelectric characteristics of 0-3piezoelectric ceramic/ sulphoaluminate cement composites

0-3 cement based piezoelect ric composites were fabricated using sulphoaluminate cement and piezoelect ricceramic [0.08Pb (Li_1/4 Nb_3/4 ) O₃ ·0. 47PbTiO₃ ·0. 45PbZrO₃ ] as raw materials. The phase component s and micrO₂st ructures of the composites were analyzed by XRD and SEM. The dielectric f requency characteristics and ferroelectriccharacteristics of the composites were mainly investigated. The results indicate that the bonding between piezoelectricceramic particle and hydration product s of sulphoaluminate cement is good. With increasing the PLN content , thedielect ric constantε_r , remanent polarization Pr and coercive field Ec increase. The dielectric constant decreases sharplywith f requency increasing over the f requency ranges f rom 40 kHz to 100 kHz , which is att ributed to interfacialpolarization in the composite. At high f requency , the dielect ric constant changes slightly , which means that thecement-based piezoelect ric composites have good high f requency stability. The reasons why the hysteresis loopsdistort are mainly that there are both many defect s in the piezoelect ric ceramic particles af ter breaking and manyinterfacial pores in the composites.