期刊
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
卷 64, 期 10, 页码 1608-1616出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TUFFC.2017.2721443
关键词
Bi(Zn2/3Nb1/3)O-3 substitution; complex perovskite; Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT) solid solution,piezoelectric and ferroelectric properties; relaxor behavior
资金
- U.S. Office of Naval Research [N00014-12-1-1045, N00014-16-1-3106]
- Natural Science and Engineering Research Council of Canada [203773]
- National Natural Science Foundation of China [51332003, 51202184]
- International Science and Technology Cooperation Program of China [2011DFA51880]
- 111 Project of China [B14040]
- China Scholarship Council
Relaxor lead magnesium niobate (PMN)-based materials exhibit complex structures and unusual properties that have been puzzling researchers for decades. In this paper, a new ternary solid solution of Pb(Mg1/3Nb2/3)O-3-PbTiO3Bi(Zn2/3Nb1/3)O-3 (PMN-PT-BZN) is prepared in the form of ceramics, and the effects of the incorporation of BZN into the PMN-PT binary system are investigated. The crystal structure favors a pseudocubic symmetry and the relaxor properties are enhanced as the concentration of BZN increases. The relaxor behavior and the related phase transformations are studied by dielectric spectroscopy. A phase diagram mapping out the characteristic temperatures and various states is established. Interestingly, the piezoelectricity of the PMN-PT ceramics is significantly enhanced by the BZN substitution, with an optimal value of d(33) reaching 826 pC/N for 0.96[0.7Pb(Mg1/3Nb2/3)O(3)0.3PbTiO(3)]-0.04Bi(Zn2/3Nb1/3)O-3. This paper provides a better understanding of the relaxor ferroelectric behavior, and unveils a new relaxor-based ternary system as piezoelectric materials potentially useful for electromechanical transducer applications.
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