Modified Pb(Mg1/3Nb2/3)O3-PbZrO3–PbTiO3 ceramics with high piezoelectricity and temperature stability |
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| Authors: | Pengbin Wang Qinghu Guo Fei Li Fangquan Xia Hua Hao Huajun Sun Hanxing Liu Shujun Zhang |
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| Affiliation: | 1. State Key Lab Silicate Materials for Architecture, Center for Smart Materials and Device Integration, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, China;2. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi’an Jiaotong University, Xi’an, China;3. School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China;4. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center for Smart Materials and Device Integration, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, China;5. Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, NSW, Australia |
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| Abstract: | There is a great demand to develop ferroelectric ceramics with both high piezoelectric coefficient and broad temperature usage range for emerging electromechanical applications. Herein, a series of Sm3+-doped 0.25Pb(Mg1/3Nb2/3)O3-(0.75?x)PbZrO3-xPbTiO3 ceramics were fabricated by solid-state reaction method. The phase structure, dielectric and piezoelectric properties were investigated, where the optimum piezoelectric coefficient d33 = 745 pC/N and electromechanical coupling factor k33 = 0.79 were obtained at the morphotropic phase boundary composition x = 0.39, with good Curie temperature TC of 242°C. Of particular importance is that high-temperature stability of the piezoelectric and field-induced strain was obtained over the temperature range up to 230°C for the tetragonal compositions of x = 0.40. The underlying mechanism responsible for the high piezoelectricity and temperature stability is the synergistic contribution of the MPB and local structural heterogeneity, providing a good paradigm for the design of high-performance piezoelectric materials to meet the challenge of piezoelectric applications at elevated temperature. |
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| Keywords: | local structural heterogeneity morphotropic phase boundary piezoelectricity PMN-PZ-PT relaxor |
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