Large Piezoelectric Coefficient in (Ba1−xCax)(Ti0.96Sn0.04)O3 Lead-Free Ceramics


  • This work was supported by the Natural Science Foundation of Shandong Province of China (No. ZR2011EMQ015) and the Research Fundation for Excellent Young and Middle-aged Scientisits of Shandong Province of China (No. BS2010CL010).

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Lead-free (Ba1−xCax)(Ti0.96Sn0.04)O3 (BCST) (= 0–0.04) ceramics were prepared using solid-state reaction technique. At room temperature, a polymorphic phase transition from orthorhombic phase to tetragonal phase was identified in the composition range of 0.01 ≤  0.03. Extremely high piezoelectric coefficient of d33 = 510 pC/N and high planar electromechanical coupling factor of kp = 48% were obtained for the BCST ceramics at = 0.02. These results indicate that the BCSTs are promising candidates for the widely used lead-based piezoelectric materials.