Electromechanical properties of Bi(Mn1/2Ti1/2)O3 doped Pb0.94Sr0.05La0.01(Zr0.54Ti0.46)0.9975O3 materials

Abstract

The solid-phase reaction technique was used to fabricate a Pb_0.94Sr_0.05La_0.01(Zr_0.54Ti_0.46)_0.9975O₃ doped Bi(Mn_1/2Ti_1/2)O₃ piezoelectric ceramic system. The material's structure and microstructure were examined by using scanning electron microscopy (SEM) and XRD analysis. The addition of Bi(Mn_1/2Ti_1/2)O₃ to Pb_0.94Sr_0.05La_0.01(Zr_0.54Ti_0.46)_0.9975O₃ contributes to the transition of the tetragonal phase to the rhombohedral phase; the average particle size decreases, while the mechanical quality coefficient Q_m of the material increases. A product with a composition of 0.97 Pb_0.94Sr_0.05La_0.01(Zr_0.54Ti_0.46)_0.9975O₃ – 0.03 Bi(Mn_1/2Ti_1/2)O₃ has the characteristics of hard piezoelectric ceramic with the electromechanical coupling factor k_p = 0.59; k_t = 0.48; piezoelectric constant d₃₃ = 446 pC/N; mechanical quality factor Q_m = 774; phase transition temperature T_m = 265°C. This material exhibits properties comparable with commercial materials such as PZT4 and PZT8. This hard ceramic has the potential for use in power ultrasonic devices.