PSN-PZN-PZT四元系压电陶瓷的研究

Study on PSN-PZN-PZT quaternary piezoelectric ceramics

采用传统的固相烧结方法制备了Pb（Sn1/3Nb2/3）O3-Pb（Zn1/3Nb2/3）O3-PbZrO3-PbTiO3（PSN-PZN-PZT）四元系压电陶瓷,并通过添加MnO2、Sb2O3和SrCO3、BaCO3以提高材料的性能.通过X射线衍射（XRD）对合成后材料的物相进行了分析,用扫描电子显微镜（SEM）观察了样品表面的显微结构,并且讨论了Sr质量分数对材料介电、压电性能及温度稳定性的影响.实验结果表明：Sr^2＋部分置换Pb^2＋使得准同型相界向富Zr方移动,降低了居里温度,增大了介电半高宽值;当xSr取值范围0.02~0.04时,经960℃、126 0℃的烧结,系统的综合性能最佳.

Pb （ Sn1/3 Nb2/3 ） O3-Pb （ Zn1/3 Nb2/3 ） 03-PbZrO3-PbTiO3 （PSN-PZN-PZT） quaternary piezoelectric ceramics were prepared by conventional solid solution method. The samples were gained by adding MnO2, Sb203, SrCO3 and BaCO3 in order to enhance the properties. The X-ray diffraction （XRD） and the scanning electronic microscope （SEM） were applied to analyze phases and microstructure, respectively. The effects of Sr content on the dielectric and piezoelectric properties and temperature stability of the system were also discussed. The results indicated that partial substitution of Sr^2＋ for Pb^2＋ shifted the MPB toward rich-Zr, reduing the curie temperature and broadening the dielectric constant maximum. The optimum properties were obtained with xsr to 0.02 ~ 0.04 at calcination temperature of 960℃ and sintefing temperature of 1 260 ℃.