Effect of Sr addition on piezoelectric properties and the transition temperature of BaTiO3

Abstract

Single phased Sr substituted BaTiO3 ceramics were synthesized by a sol-gel route and were found to crystallise in tetragonal symmetry with P4mm space group using rietveld refinement. With increase in Sr content the tetragonality was reduced to pseudocubic and the Curie temperature (T c) decreased with a rate of 3.33 K/mol %. This transition temperature has been determined by studying the thermal evolution of Cole- Cole diagrams (ε'' vs ε'). Effects of Sr content (x) and sintering time (4 and 8 h) on density, crystalline structure and piezoelectric properties were also investigated.