14.熔盐法制备大功率PMS-PZT压电陶瓷及强场性能研究

¹吴秋晨²周静怡¹金善龙¹周汪磊¹范桂芬¹王晓川

(¹华中科技大学光学与电子信息学院，电子信息材料教育部重点实验室，武汉430074)

（²华中科技大学附属中学，武汉 430074）

关键词：压电陶瓷；强场性能，熔盐法；PMS-PZT

中图分类号：TM282   文献标识码：A

摘要：本文采用熔盐法制备了PMS-PZT压电陶瓷超细粉体，研究粉体粒度对PMS-PZT烧结特性和强场性能的影响。TEM结果表明，随着熔盐与粉体摩尔比逐渐增加，粉体粒度逐渐减小，当摩尔比超过5：1，粒径大小几乎不变。当摩尔比为5：1时，750℃预烧，可以获得分散性好粒径在0.2~0.3μm的超细粉体。摩尔配比为1：1的粉体在1200℃条件下烧结制备的PMS-PZT压电陶瓷，可以获得最佳的综合性能：ε_r可达1518，tanδ=0.515%（1V/mm），tanδ=2.62%（300V/mm），机电耦合系数k_p可达0.65，压电常数d₃₃达到373pC/N，机械品质因素Q_m达到1037。

                        Study on high power PMS-PZTpiezoelectric ceramics prepared by molten salt method and its strong fieldproperties

                                                                                                ¹Wu Qiuchen, ²ZhouJinyi, ¹Jin Shanlong, ¹Zhou Wanglei, ¹FanGuifen, ¹Wang Xiaochuan

(¹School of opticaland electronic information, Key Lab of Functional Materials For ElectronicInformation, MOE, Huazhong University of Science and Technology, Wuhan 430074,PR China)

                                        (²Affiliated HighSchool of Huazhong University of Science and Technology，Wuhan 430074, PRChina)

Keywords: Piezoelectricceramics, strong field properties, molten salt method, PMS-PZT

Abstract: Ultrafinepowders of PMS-PZT piezoelectric ceramics were prepared by molten salt method, and the effect of powder size on thesintering characteristics and strongfield properties of PMS-PZT were studied. TEM results show that with theincrease of the molar ratio of molten salt and powder, the particle size of thepowder is gradually reduced, and when the molar ratio exceeds 5:1, the particlesize remains almost unchanged. With the molar ratio of 5:1 and the calcinetemperature of 750℃, theultrafine powder with good dispersion and fine particle size can be obtained.When the molar ratio for PMS-PZT 1:1 powder is used to prepare the piezoelectricceramics under 1200℃,which can provide the best comprehensive performance as follows: er=1518,tand=0.515% (1V), tan delta =2.62% (300V), K_P =0.65, d₃₃=373pC/N, and Qm=1037.