大功率收发兼备压电陶瓷材料的制备与性能研究

Study on processing and properties of high power and receiving-projecting dual-purpose piezoelectric ceramic

采用传统固相烧结法制备Pb0.94Sr0.06(Zr0.53Ti0.47)O3+(Ni2O3+Cr2O3)0.1wt%+xwt%MnO2+ywt%CeO2(简称PCrNi-4)压电陶瓷,通过正交试验设计研究了MnO2掺杂、CeO2掺杂、烧结温度等因素对基体材料性能的影响。利用XRD和SEM,并结合常规电性能测试手段研究不同影响因素对材料相结构、微观结构以及压电介电性能的影响。结果表明,当w(MnO2)=0.1%,w(CeO2)=0.3%,烧结温度为1280℃时制备的陶瓷综合性能最佳,此条件下的试样各性能参数分别为:d33=304.8pC/N,Kp=0.6113,εT33=1520,tgδ=0.289%,d33×g33=61.12×10-12CVm/N,适合制备大功率收发兼备压电换能器。

The piezoelectric ceramics Pb 0.94Sr 0.06（Zr 0.53Ti 0.47）O 3＋（Ni 2O 3＋Cr 2O 3）0.1wt%＋xwt%MnO 2＋ ywt%CeO 2（abbreviated as PCrNi-4）were prepared by traditional ceramics process in this paper.The influences of MnO 2and CeO 2-doping and sintered temperature on matrix material properties were studied by orthogonal tests.The effect of different inducing factor on microstructure and dielectric loss were analyzed by means of XRD,SEM and electric measurement.The results indicate that the optimum process conditions is w（MnO 2）= 0.1%、w（CeO 2）= 0.3% and the sintering temperature 1280℃.The main influencing factor on dielectric loss is MnO 2-doping.The property parameter of samples are：d 33=304.8pC/N,Kp=0.6113,εT33=1520,tgδ=0.00289,d 33×g 33=61.12×10-12CVm/N,which is suited to high power and receiving-projecting dual-purpose piezoelectric ceramic.