Effect of Different Mn-doping Types on BLFG-PT High-temperature Piezoelectric Ceramics

Mn-doped 0.63(Bi0.94La0.06)(Fe0.95Ga0.05)-0.37PbTiO3 ceramics with exactly stoichiometric ratio in lattice for substituting Ti-site induced large microstructure distortion and internal stress. However, for the specimens of Mn introduction as sintering aids, distinct relaxation characteristic transforming from pure BLFG-PT can be obtained. Moreover, little difference could be classified according to the selected raw materials of MnCO3 and MnO2 on the properties of BLFG-PT ceramics. They both could effectively improve the density and make the high-temperature phase transition become more diffused, revealing relaxor ferroelectrics characteristic. In addition, all the Mn-doped samples, greatly decreased dielectric loss were observed which indicates the potential use of Mn-doping in high power piezoelectric device application and modification.