Influence of the sintering temperature on ferroelectric properties of potassium-sodium niobate piezoelectric ceramics

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Abstract

The effect of sintering condition on structure, microstructure, and ferroelectric properties of (K0.44Na0.52Li0.04) (Nb0.86Ta0.10Sb0.04)- O3 (KNL-NTS) has been investigated. Ceramic powders have been synthesized by the solid-state reaction method and sintered at different temperatures (1115°C, 1125°C, and 1140°C). Then, samples were characterized by thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, and impedance spectroscopy. Through XRD results, the perovskite structure and small peaks corresponding to a secondary phase were detected. Ceramics processed at the highest temperatures showed higher densities and good piezoelectric properties (d33, Kp, and Kt), particularly specimens sintered at 1125°C presented the highest piezoelectric performance.

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Cortés, J. A., Camargo, J., Rachia, M. F., Rubio-Marcos, F., Ramajo, L., Castro, M., & Ramírez, M. A. (2021). Influence of the sintering temperature on ferroelectric properties of potassium-sodium niobate piezoelectric ceramics. Journal of Advanced Dielectrics, 11(3). https://doi.org/10.1142/S2010135X21400026

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