Abstract
(1 − x)(K0.5Na0.5)NbO3 − xGdMnO3 (KNN–xGM) ferroelectric ceramics (0 ≤ x ≤ 5 mol.%) were obtained through a solid state technique. For all the studied compositions, orthorhombic perovskite crystalline structures were obtained at room temperature. GdMnO3 suppresses the grain growth and gives rather homogenous microstructures as the concentration increases. The doped ceramics exhibita good dielectric response, a “hard” ferroelectric behavior and good piezoelectric properties. An improved mechanical quality factor of 1180 and a high Curie temperature T C = 400°C, coupled with k p = 0.426, makes the composition x = 1 mol.% GdMnO3 suitable for lead-free piezoelectric materials for high-power and high-temperature applications.
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Bucur, R.A., Badea, I., Bucur, .I. et al. Good Quality Factor in GdMnO3-Doped (K0.5Na0.5)NbO3 Piezoelectric Ceramics. J. Electron. Mater. 45, 3046–3052 (2016). https://doi.org/10.1007/s11664-016-4401-0
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DOI: https://doi.org/10.1007/s11664-016-4401-0