Effect of crystallographic orientation in textured Baa0.92Ca0.08TiO3 piezoelectric materials

Abstract

Strongly textured lead-free Ba0.92Ca0.08TiO3 piezoelectric ceramics were fabricated by tape casting and templated grain growth. Dense ceramics with both favorable and unfavorable texture were successfully prepared. Enhanced piezoelectric performance was demonstrated for ceramics with texture, in line with the predictions based on reported piezoelectric coefficients of tetragonal BaTiO3. Due to the expanded tetragonal range through Ca-substitution, texture is favorable over a wide temperature range. The texture also results in the enhanced piezoelectric performance being temperatureindependent. In addition to engineering of stable, high-performance lead-free piezoelectric ceramics, this study has demonstrated that consideration of the extender/rotator nature of piezoelectric properties are imperative for improving the piezoelectric response through texturing.