Achieving both high electromechanical properties and temperature stability in textured PMN-PT ceramics |
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Authors: | Shuai Yang Mingwen Wang Lu Wang Jinfeng Liu Jie Wu Jinglei Li Xiangyu Gao Yunfei Chang Zhuo Xu Fei Li |
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Affiliation: | 1. Electronic Materials Research Laboratory (Key Lab of Education Ministry), State Key Laboratory for Mechanical Behavior of Materials and School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, China;2. Condensed Matter Science and Technology Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin, China |
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Abstract: | Textured piezoelectric ceramics, such as textured Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) ceramics, have attracted considerable attention from both academia and industry, as they possess crystal-like piezoelectric properties, high composition homogeneity, and low manufacturing cost. However, the main difficulty with the textured piezoelectric ceramics is the presence of BaTiO3 (BT) templates, which greatly reduces their piezoelectricity and phase transition temperature. Thus, it is highly recommended to fabricate textured piezoelectric ceramics using as few templates as possible. Here, we successfully fabricated high-quality <001>-textured PMN-28PT ceramics (texturing degree of 99%) by using an extremely small amount of BT templates (1 vol.%) with the help of CuO/B2O3 sintering aids. The textured PMN-28PT ceramic exhibits 80% piezoelectric coefficient (d33 ~ 1200 pC/N), 96% electromechanical coefficient (k33 ~ 88%) and the same temperature stability (Trt ~ 100, Tc ~ 150°C) when compared to its single crystal counterpart. In addition, by using an alternating current electric field poling (AC-poling), the piezoelectric coefficient d33 and dielectric permittivity ε33 of the textured PMN-28PT ceramics were further enhanced around 5–8%. It is believed that the advantages of high electromechanical properties, low cost, and easy mass production of textured PMN-28PT ceramic will make it a promising candidate for advanced electromechanical devices. |
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Keywords: | alternating current electric field piezoelectric materials textured ceramics |
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