Piezoelectric Properties in the Perovskite BiScO3–PbTiO3–(Ba,Sr)TiO3 Ternary System

摘要: A new ternary system (1-x)BiScO3–x{(1-y)PbTiO3–y(Ba0.294Sr0.706)TiO3} was studied in relation to morphotropic phase boundaries (MPB). Analogous modified PZT ceramics, barium and strontium were introduced the recently developed MPB (1-x)BiScO3–xPbTiO3 for x>0.60, order investigate Curie temperature piezoelectric property variations. With increasing substitution up y=0.3, line moved from x=0.64 0.70 d33 kp gradually decreased. X-ray diffraction analysis correlated variations properties showing a maximum compositions near rhombohedral–tetragonal boundary. Grain sizes around 2 µm all tetragonality decreased with downward shifting of Tc range 216–371°C. The frequency dependence dielectric about shows dispersion both e' tan δ. This relaxation behavior becomes more pronounced (Ba,Sr)TiO3 content, high temperatures Tmax's are found compared lead based perovskites complex B-sites.