American Institute of Physics, Journal of Applied Physics, 13(116), p. 134102, 2014
DOI: 10.1063/1.4896840
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Strongly textured lead-free Ba0.92Ca0.08TiO3 piezoelectric ceramics were fabricated by tape casting and templated grain growth. Dense ceramics with both favorable ⟨100⟩ and unfavorable ⟨111⟩ texture were successfully prepared. Enhanced piezoelectric performance was demonstrated for ceramics with ⟨100⟩ texture, in line with the predictions based on reported piezoelectric coefficients of tetragonal BaTiO3. Due to the expanded tetragonal range through Ca-substitution, ⟨100⟩ texture is favorable over a wide temperature range. The ⟨100⟩ texture also results in the enhanced piezoelectric performance being temperature-independent. 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 is imperative for improving the piezoelectric response through texturing