Abstract
High visible light transmittance (1 − x)(K0.5Na0.5)NbO3−xSr(In0.5Nb0.5)O3 (KNN−xSIN, x = 0.05, 0.10, 0.15, 0.20, 0.25) lead-free ceramics with excellent electrical properties were synthesized by traditional solid-state method. The effects of Sr(In0.5Nb0.5)O3 doping on the optical properties, microstructure, and electrical performance were analyzed. The results showed that light transmission in KNN−xSIN ceramics was induced by the dense and fine-grain microstructure, the high symmetry of the pseudo-cubic structure as well as typical relaxor behavior of KNN−0.25SIN ceramic. Moreover, KNN−xSIN transparent ceramics with relaxor characteristics possessed permittivity stability over a wide temperature range. Ferroelectric properties were deteriorated gradually with increasing SIN content in virtue of the strengthened relaxor behavior. Its energy storage property was also tailored by the increasing relaxor characteristic. The appearance of a non-Debye type of relaxation was detected through an impedance Cole–Cole plots.
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Acknowledgements
This work is supported by the National Nature Science Foundation of China (11664006, 61741105), Guangxi Nature Science Foundation (2016GXNSFAA380069) and Guangxi Key Laboratory of Information Materials (161001-Z, 171009-Z), Graduate Innovation Research Project of Guilin University of Electronic Technology (2018YJCX81).
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Xie, H., Liu, G., Yang, L. et al. Excellent optical, dielectric, and ferroelectric properties of Sr(In0.5Nb0.5)O3 modified K0.5Na0.5NbO3 lead-free transparent ceramics. J Mater Sci: Mater Electron 29, 19123–19129 (2018). https://doi.org/10.1007/s10854-018-0038-5
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DOI: https://doi.org/10.1007/s10854-018-0038-5