以溶胶-自燃烧法合成PZT为基制备PMZN压电陶瓷

Preparation of PZT-PMZN Piezoceramics Using Sol-Selfcombustion Method

以硝酸锆为锆源,采用溶胶-自燃烧法在700℃的热处理温度下合成出具有单一钙钛矿结构的PZT粉料。采用溶胶-自燃烧法合成的PZT为基料,在1050℃制备出PMZN陶瓷。采用XRD,SEM研究了PMZN陶瓷的结构,并测量了其介电性能和压电性能。结果表明:PMZN陶瓷为四方钙钛矿结构,其主要电学性能指标为:K_p为0.54,Q_m为1073,tgδ小于或等于0.001,ε_(33)=1236,d_(33)=454pC/N,f_s为136.1kHz。与以常规固相反应法合成PZT为基料的PMZN陶瓷相比,以溶胶-自燃烧法合成PZT为基料的PMZN陶瓷的烧结温度较低,而且综合电学性能更为优良。

Using the Zr(NO_3)_4·5H_2O as the Zr source, PZT powder with a single pervoskite structure was syn- thesized by a sol-slefcombustion method at a calcining temperature of 700℃, which is lower by 200℃ than that of a conventional solid-state reaction method. The PMZN ceramics were prepared at 1050℃ using the resulting PZT powder as the matrix. The microstructure of PMZN ceramics was examined by XRD and SEM, and the dielectric and piezoelectric properties were also measured. The results show that the PMZN piezoelectric ceramics has a tetragonal pervoskite structure. The main electrical properties are as follows: K_p=0.54, Q_m=1073, tgδ≤0.001, ε_(33)=1236, d_(33)=454pC/ N,f_s=136.1kHz. The sintering temperature of PMZN ceramics using PZT synthesized by the sol-selfcombustion method as the matrix is lower by 150℃ than that of the ceramics using the PZT synthesized by the conventional solid- state reaction method as the matrix, while they also exhibit more superior electrical properties.