Effect of sintering temperature and composition on microstructure and properties of PMS-PZT ceramics
(1.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
2.College of Science, Air Force Engineering University, Xi’an 710051, China
3.陕西省西安市西北工业大学凝固加工国家重点实验室
4.Key Laboratory of Electronic Materials Research, Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China)
2.College of Science, Air Force Engineering University, Xi’an 710051, China
3.陕西省西安市西北工业大学凝固加工国家重点实验室
4.Key Laboratory of Electronic Materials Research, Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China)
Abstract: The piezoelectric ceramics xPb(Mn1/3Sb2/3)O3-(1？x)Pb(Zr1/2Ti1/2)O3 (abbreviated as PMS-PZT) were synthesized by traditional ceramics process. The effect of sintering temperature and the amount of Pb(Mn1/3Sb2/3)O3 (abbreviated as PMS) on phase structure, microstructure, piezoelectric and dielectric properties of PMS-PZT ceramics was investigated. The results show that the pure perovskite phase is in all ceramics specimens, the phase structure of PMS-PZT ceramics changes from tetragonal phase to single rhombohedral phase with the increasing amount of PMS. The dielectric constant εr, Curie temperature TC, electromechanical coupling factor kp and piezoelectric constant d33 decrease, whereas the mechanical quality factor Qm and dielectric loss tanδ increase with the increasing amount of PMS in system. The optimum sintering temperature is 1 200？1 250 ℃. It is concluded that the PMS-PZT (x=0.07) ceramics sintered at 1 250 ℃ is suitable for high-power piezoelectric transformer. These properties include εr＝674.8, tanδ＝0.005 25, kp＝0.658, Qm＝1 520, d33=230 pC/N, Tc=275 ℃.
Key words: PMS-PZT piezoelectric ceramics; piezoelectric properties; dielectric properties; perovskite