Modification of Pb(Zr,Ti)O3 by Doping Mo based on High Power Ultrasonic Transducer

• 作 者: XING Xiuqin ZHU Xijing
• 机 构: School of Mechanical Engineering, North University of China, Taiyuan 030051, China
• 出 处: 武汉理工大学学报（材料科学版）（英文版）
• 发表日期: 2020年6期
• 关键词: piezoelectric ceramic power ultrasonic transducer doping modification surface mo

In view of the special requirements of transducers for power ultrasonic processing, the piezoelectric ceramic material Pb(Zr,Ti)O3 was modified by adding other effective elements. The piezoelectric ceramic piece has a good crystal phase structure, a stable piezoelectric constant, a higher dielectric constant, and a lower dielectric loss by adding a small amount of Sr2+, Ba2+, Ga2+, Sn4+, Nb5+, etc. These properties are well suited to requirements of power ultrasonic transducer more than 1000 W. The crystal phase structure and surface morphology of the modified piezoelectric ceramic chips were analyzed by X-ray and scanning electron microscopy (SEM) to prove that the piezoelectric ceramic chips have good crystal structure and density. The dielectric constant of the polarized piezoelectric ceramic chips was measured using an LCR meter. Finally, the piezoelectric ceramic chips were used to design the ultrasonic transducer, and the transducer was analyzed and measured by the impedance analyzer. The measurement results show that the performance of the piezoelectric ceramic chips is reasonable and feasible.