高压电系数高居里温度压电陶瓷材料的研究

Research on piezoeletric ceramic material with high piezoelectric coefficient and high Curie temperature

在实验室条件下,对Pb[(Zn1/3Nb2/3)xZryTi1-x-y]O3进行了实验研究。改变Zr/Ti成分比和用La置换Pb以及改变Pb(Zn1/3Nb2/3)O3的摩尔分数等对压电系数d33和居里温度Tc都有明显的影响,用少量的La置换Pb能有效地提高d33值,与此同时,Tc显著下降,随着Pb(Zn1/3Nb2/3)O3的摩尔分数增加,d33值相应增大,Tc则相对下降幅度较小。当Zr/Ti比为33.5/36.5,x=0.34时,材料的性能较佳,d33=460×10-12C.N-1,Tc=280℃,机电耦合系数Kp=0.59,介电常数εTr=2 400。

At laboratory condition, performances of Pb[（Zn1/3Nb2/3）,ZryTi1-x-y]O3 are studied experimently. Changing the ratio of Zr/Ti, replacing Pb with La and changing tool fraction of Pb （ Zn1/3 Nb2/3 ）O3, piezoelectric coefficient d33 and Curie temperature Tc may change greatly. Replacing Pb with a few La, d33 may increase effectively, meanwhile, Tc decreases apparently. As tool fraction of Pb （ Zn1/3 Nb2n ） O3 increases,d33 value increases relatively, Tc decreases lightly. When the ratio of Zr/Ti equals to 33.5/36.5, x equals to 0.34, the performances of material are optimum. In this case, d33, Tc, Kp （ electro-mechanical coupling factor） and εr^T （permittivity） could be 460×10^-12C·N^-1,Tc=280℃,0.59,2400 respectively.