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

Resumo

Single phased Sr substituted BaTiO₃ ceramics were synthesized by a sol-gel route and were found to crystallise in tetragonal symmetry with P_4mm 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.