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以快硬硫铝酸盐水泥为基体,以锆钛酸铅(PZT)为功能相,用压制成型法制备出0-3型PZT/水泥基压电复合材料。分析了成型压力对PZT/水泥基压电复合材料的压电性和介电性的影响,结果表明:不同粒径PZT颗粒做功能相的水泥基压电复合材料,成型压力对其压电性及介电性有不同的影响。在30-90MPa压力范围内,成型压力越大,水泥基压电复合材料的压电应变常数d33和相对介电常数εr均显著提高,这是由于气孔率随压力增大而减少,而压电电压常数g33的变化则与功能相的粒径有关。机电耦合系数也有着不同的变化趋势,对于6μm和126μm PZT/水泥基压电复合材料,其机电耦合系数Kt和Kp随压力增大缓慢下降,而对于430μm PZT/水泥基压电复合材料则呈上升趋势。当压力达到150MPa时,其压电性和介电性均发生急剧减小。
Based on the fast-hardening sulphoaluminate cement as the matrix and the lead-zirconium titanate (PZT) as the functional phase, 0-3 PZT / cement-based piezoelectric composites were prepared by compression molding. The effect of forming pressure on the piezoelectricity and dielectric properties of PZT / cement-based piezoelectric composites was analyzed. The results show that the cement-based piezoelectric composites with different particle size PZT particles as functional phase, And dielectric have different effects. In the pressure range of 30-90MPa, the larger the molding pressure, the piezoelectric strain constant d33 and the relative dielectric constant εr of the cement-based piezoelectric composites are significantly increased, which is due to porosity decreases with increasing pressure, and piezoelectric The change of the voltage constant g33 is related to the particle size of the functional phase. The electromechanical coupling coefficients also have different trend. For 6μm and 126μm PZT / cement based piezoelectric composites, the electromechanical coupling coefficients Kt and Kp decrease slowly with increasing pressure, while for 430μm PZT / cement based piezoelectric composites Upward trend. When the pressure reaches 150MPa, its piezoelectricity and dielectric properties are dramatically reduced.