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用PZT压电陶瓷粉末分散在无压电性的橡胶基体中制成压电复合材料。通过压电常数和介电常数测定、扫描电镜、介电谱等手段研究了有关因素对复合材料压电性能的影响。结果表明,复合材料的压电常数d_(33)随PZT体积含量φ和橡胶介电常数ε_1的增加而增大,随PZT介电常数ε_2的增加而减小,符合理论式橡胶基体的极性基团、极性链节和交联健偶极的转向极化及分子链的柔性对复合材料的极化和压电常数有重要影响。橡胶的极性越大及分子链的柔性越高,则复合材料的压电常数d_(33)越高。
PZT piezoelectric ceramic powder dispersed in non-piezoelectric rubber matrix made of piezoelectric composite material. The piezoelectric properties and dielectric constant determination, scanning electron microscopy, dielectric spectroscopy and other means to study the impact of the factors on the piezoelectric properties of composites. The results show that the piezoelectric constant d_ (33) of composites increases with the increase of PZT volumetric content φ and rubber dielectric constant ε_1 and decreases with the increase of dielectric constant ε_2 of PZT, which accords with the polarity of the theoretical rubber matrix The polarization of groups, polar links and crosslinked dipoles and the flexibility of the molecular chains have important effects on the polarization and piezoelectric constant of the composites. The greater the polarity of the rubber and the higher the flexibility of the molecular chain, the higher the piezoelectric constant d_ (33) of the composite material.