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Effect of NaCl on the microstructure and electrical properties of K0.5Na0.5NbO3 ceramics prepared by cold sintering process

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Abstract

K0.5Na0.5NbO3 ceramics are considered as a potential candidate for PZT due to its excellent electrical properties and high Curie temperature. In this work, Cold sintering process (CSP) has been used in preparing the K0.5Na0.5NbO3-NaCl ceramics. Based on the experimental characterization, utilizing NaCl aqueous solutions as a transient solvent can change the grain microstructure of KNN ceramics, inhibit the volatilization of alkali metal elements, and lower the sintering temperature. As sintering at 900 °C, the electrical properties of the ceramic were Tc= 448 °C, d33= 115 pC/N, kp= 32%, and the obtained sample had an average grain size of 0.5 μm. The results indicate that CSP with NaCl aqueous solutions is an efficient method for low-temperature sintering of KNN ceramics with uniform grain size as well as good performance in electrical properties.

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  1. Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, People’s Republic of China

    Mengshuang Chi, Weibing Ma, Jingdong Guo, Jinquan Wu, Tingting Li, Shenghui Wang & Pengfei Zhang

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  1. Mengshuang Chi
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Chi, M., Ma, W., Guo, J. et al. Effect of NaCl on the microstructure and electrical properties of K0.5Na0.5NbO3 ceramics prepared by cold sintering process. J Mater Sci: Mater Electron 30, 21435–21443 (2019). https://doi.org/10.1007/s10854-019-02523-2

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