【摘要】 研究保温时间对PMSZT压电陶瓷的相组成、显微结构及电性能的影响。结果发现,烧结温度1240℃保温1h时,密度达极值7.83g/cm3。保温1h的试样,晶粒致密均匀,居里温度最低。随着保温时间的缩短或延长,居里温度增加。电性能在保温1h时达最佳,εT33/ε0=1700,d33=336pC/N,Kp=0.655,Qm=2200,tgδ=0.0030。更多还原

【Abstract】 The effects of soaking time on crystallographic phase, microstructure and electric-properties of Pb（Mn_<sup>1/3 Sb_<sup>2/3 ）_<sup>0.05 Zr_<sup>0.47 Ti_<sup>0.48 O₃ （PMSZT） piezoelectric ceramics have been studied in the paper. X-ray diffraction （XRD） results demonstrated that the pure perovskite structure was obtained and no pyrochlore phase was detected for PMSZT samples sintered at 1240℃ for different soaking time. Scanning electron microscopy （SEM） revealed that grains grew up homogeneously and developed well with soaking time of 1h. The sintered density reached its maximum value of 7.83g/cm3 and a well-situated property of εT_<sup>33 /ε₀ （1700）, d_<sup>33 （336pC/N）, K_p（0.62）, Q_m （2200）, tgδ（0.0030） were obtained at sintering of 1240℃ for 1h. The Curie temperature had a minimum value with soaking time of 1h. When soaking time prolonging or shortening, the Curie temperature moved to a high temperature.更多还原