Improving the piezoelectric thermal stability by tailoring phase transition behavior in the new (1 - X)0.65PbMg 1/3Nb 2/3O 3-0.35PbTiO 3-xBiZn 1/2Ti 1/2O 3 perovskite solid solutions

摘要

The phase transition behavior and its effect on thermal stability of the piezoelectric properties of the (1 - x)[0.65PbMg 1/3Nb 2/3O 3-0.35PbTiO 3]-xBiZn 1/2Ti 1/2O 3 ceramics with 0 ≤ x ≤ 0.06 were investigated. The phase transition from the monoclinic to tetragonal phase was determined by the dielectric constant and elastic constant measurements. The temperature independent piezoelectric response with -d 31 = 188 pC/N was obtained from 175 to 337 K for the composition with x = 0.02. The enhanced thermal stability of piezoelectric response was achieved by shifting the monoclinic-tetragonal phase transition to the lower temperature.