Lead-free xBaZrO 3 -(0.25-x)CaTiO 3 -0.75Ba TiO 3 ; x = 0.00-0.25 ceramics were successfully prepared using the conventional solid-state reaction method. Analysis of the sintered ceramics showed that all compositions exhibited a pure phase perovskite. The effects of composition on the phase transition, ferroelectric properties, and piezoelectric properties were studied. With the increasing BaZrO 3 content, the phase transition temperature (T C ) decreased and the coercive field E c decreased. The phase diagram featuring a cubic-rhombohedral-tetragonal triple point (x * 0.125) was derived from X-ray diffraction data and dielectric data as a function of temperature. Compositions near the convergence region exhibited the maximum peak in permittivity of *11,400 at T C . In addition, the morphotropic phase boundary compositions showed an enhancement in ferroelectric and piezoelectric properties. The composition 0.125BaZrO 3 -0.125CaTiO 3 -0.75BaTiO 3 exhibited the highest strain values of 0.14 % and a d 33 * of 474 pm/V.
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