Abstract
Pure phase (1-x)BiFeO3-xSrTiO3 (0 ≤x ≤ 0.9) ceramics were synthesized by a conventional solid reaction method. The crystal structure of the solid solution changes from rhombohedral to pseudocubic at x = 0.2–0.4, then to cubic at x = 0.8. Several compositions with the pseudocubic structure have large dielectric permittivity, low dielectric loss, and flat temperature coefficients of capacitance (from room temperature up to 400 °C). As a result, they are the promising lead-free materials for capacitors of power electronics at high-temperature.
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