Abstract
We report on excellent temperature stability of the Dy‐doped (Ba0.99Ca0.01)(Ti0.98Zr0.02)O3 (BCZT‐D) ceramics with high piezoelectric coefficient of d33 = 366 pC/N and planar electromechanical coupling factor of kp = 43.0%. Meanwhile, Curie temperature of the BCZT‐D ceramics is found to be 125°C. Greatly improved temperature stability of the electromechanical coupling coefficients is found over a common usage temperature range between 20°C and 100°C, in which the BCZT‐D ceramics exhibit pure tetragonal phase. The results indicate that the BCZT‐D ceramics are promising lead‐free materials for practical applications.
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