Investigation of Structural and Electrical Properties of B-Site Complex Ion (Mg1/3Nb2/3)4+-Modified High-Curie-Temperature BiFeO3-BaTiO3 Ceramics |
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| Authors: | Xiujuan Zhou Changrong Zhou Qin Zhou Huabin Yang Zhenyong Cen Jun Cheng Lei Cao Qiaolan Fan |
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| Affiliation: | 1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, 541004, Guangxi, People’s Republic of China
2. Guangxi Experiment Center of Information Science, Guilin University of Electronic Technology, Guilin, 541004, Guangxi, People’s Republic of China
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| 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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