Effect of Mechanical Activation on the Structural Properties of Mn-Doped Na0.5Bi0.5TiO3 Ceramics

Abstract

Piezoelectric ceramics (Na0.5Bi0.5)TiO3 + 0.5 mol.% Mn (Mn-NBT) have been synthesized by mechanical activation of mixed oxides BiO2, Na2CO3, TiO2 and MnO for 1 h at room temperature. Non-activated and activated Mn-NBT powders were characterized by using X-ray diffraction and scanning electron microscopy. Also, the mechanical activation-derived Mn-NBT powders were uniaxially pressed and all pellets were sintered at 1000 degrees C and 1200 degrees C for 2 h in air atmosphere. The microstructure and phase analysis of sintered pellets was investigated by using scanning electron microscopy and X-ray diffraction.