Abstract
Lead-free piezoelectric ceramics (Ba1-xCax)(Ti0.97Zr0.01Sn0.01Ce0.01)O3 (x = 0, 0.0125, 0.025, 0.0375, 0.05, 0.075, 0.1) have been prepared by conventional solid-reaction method. X-ray diffraction and variable temperature dielectric measurements confirm the coexistence of orthohombic and tetragonal phase near room temperature at x = 0.025. With the presence of the polycrystalline phase transitions (PPT) effect, the ceramic with x = 0.025 demonstrates an excellent electrical property with piezoelectric coefficient d33 of 523 pC/N, planar electromechanical coupling coefficient kp of 49% and strain of 0.093%.
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