Abstract
B-site complex ion (Mg1/3Nb2/3)-modified high-temperature ceramics 0.71BiFeO3-0.29BaTi1−x (Mg1/3Nb2/3) x O3 (BF-BTMNx) have been fabricated by the conventional solid-state reaction method. The compositional dependence of the␣phase structure, electrical properties, and depolarization temperature of the ceramics was studied. The main phase structure of BF-BTMNx ceramics is perovskite phase with pseudocubic symmetry. The experimental results show that the dielectric and piezoelectric properties, and temperature stability strongly depend on the (Mg1/3Nb2/3)4+ content. The optimum (Mg1/3Nb2/3) content enhances the piezoelectric properties, Curie temperature, and depolarization temperature. The ceramic with x = 1% exhibited enhanced electrical properties of d 33 = 158 pC/N and k p = 0.322, combined with high-temperature stability with Curie temperature of T c = 453°C and depolarization temperature of T d = 400°C. These results show that the ceramic with x = 1% is a promising lead-free high-temperature piezoelectric material.
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Acknowledgements
This work was supported by the National Nature Science Foundation of China (61361007, 61261012, and 11364008), Guangxi Education Department Foundation (201012MS083), Guangxi Key Laboratory of Information Materials (1210908-206-Z and 1210908-222-Z), and Guangxi Experiment Center of Information Science Foundation (20130316).
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Zhou, X., Zhou, C., Zhou, Q. et al. Investigation of Structural and Electrical Properties of B-Site Complex Ion (Mg1/3Nb2/3)4+-Modified High-Curie-Temperature BiFeO3-BaTiO3 Ceramics. J. Electron. Mater. 43, 755–760 (2014). https://doi.org/10.1007/s11664-013-2952-x
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DOI: https://doi.org/10.1007/s11664-013-2952-x