Large Piezoelectric Response and Polarization in Relaxor Ferroelectric PbTiO3–Bi(Ni1/2Zr1/2)O3 |
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| Authors: | Yangchun Rong Jun Chen Huajun Kang Laijun Liu Liang Fang Longlong Fan Zhao Pan Xianran Xing |
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| Affiliation: | 1. Department of Physical Chemistry, University of Science and Technology Beijing, , Beijing, 100083 China;2. Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, Guilin University of Technology, , Guilin, 541004 China;3. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, , Beijing, 100083 China |
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| Abstract: | New binary system (1?x) PbTiO3?xBi(Ni1/2Zr1/2)O3 (PT–100x BNZ) with x ≤ 0.45 were synthesized via solid‐state reaction route. A morphotropic phase boundary (MPB) was identified around x = 0.40 by X‐ray diffraction (XRD) method. The ceramics with MPB composition exhibit enhanced ferroelectric properties. A large piezoelectric coefficient (d33) up to 400 pC/N was obtained for the PT–40BNZ, which is comparable with the PbTiO3–BiScO3 (PT–BS, 450 pC/N).The frequency dependence of dielectric permittivity of PT–40BNZ shows characteristic of a strong relaxor feature and a transition temperature around 290°C (1 MHz). Temperature effect on the unipolar strain was also investigated. The present system with high d33 is a competitive piezoelectric material, as no expensive oxide is used here compared with the PT–BS. |
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