期刊
JOURNAL OF APPLIED PHYSICS
卷 112, 期 11, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4769405
关键词
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资金
- National Natural Science Foundation of China [91022016, 21031005, 21231001]
- Fundamental Research Funds for the Central Universities, China [FRF-TP-09-004B]
- Foundation for the Author of National Excellent Doctoral Dissertation of PR China [201039]
- Program for New Century Excellent Talents in University [NCET-11-0573]
- Fok Ying Tung Education Foundation [131047]
Preparation, piezoelectric, and dielectric properties were investigated in a new Bi-based piezoelectric material of (1-x)Bi(Ni1/2Hf1/2)O-3-xPbTiO(3). The system can form a pure perovskite structure with the morphotropic phase boundary locating at x = 0.62, separating the rhombohedral and tetragonal phases. It is interesting to observe that the morphotropic phase boundary composition shows a very high piezoelectric coefficient of d(33) (446 pC/N), which is comparable to BiScO3-PbTiO3 (460 pC/N). The Curie temperature of the morphotropic phase boundary is around 290 degrees C. Furthermore, the system has a relatively low coercive field, which makes the poling easily. Temperature dependence of dielectric properties also shows that the Bi(Ni1/2Hf1/2)O-3-PbTiO3 system has a strong relaxor feature. Present new Bi-based perovskite of Bi(Ni1/2Hf1/2)O-3-PbTiO3 is a competitive piezoelectric material with high piezoelectric performance. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769405]
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