期刊
MATERIALS LETTERS
卷 66, 期 1, 页码 153-155出版社
ELSEVIER
DOI: 10.1016/j.matlet.2011.08.038
关键词
Fe2O3 doping; 0.55PNN-0.45PZT; Ceramics; Microstructure; Electrical properties
资金
- 863 project [2007AA03Z104]
- PAPD, NSFC [90923029]
- NSF of Jiangsu Province [BK2009020]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT0968]
- Funding of Jiangsu Innovation Program for Graduate Education [CXZZ11-0194]
- Funding for Outstanding Doctoral Dissertation in NUAA [BCXJ11-02]
- NUAA Research Fund for Fundamental Research
0.55Pb(Ni1/3Nb2/3)O-3-0.45Pb(Zr0.3Ti0.7)O-3(PNN-PZT) ceramics with different concentration of xFe(2)O(3) doping (where x = 0.0, 0.8, 1.2, 1.6 mol%) were synthesized by the conventional solid state sintering technique. X-ray diffraction analysis reveals that all specimens are a pure perovskite phase without pyrochlore phase. The density and grain size of Fe-doped ceramics tend to increase slightly with increasing concentration of Fe2O3. Comparing with the undoped ceramics, the piezoelectric, ferroelectric and dielectric properties of the Fe-doped PNN-PZT specimens are significantly improved. Properties of the piezoelectric constant as high as d(33)-956 pC/N, the electromechanical coupling factor k(p) similar to 0.74, and the dielectric constant epsilon(r) similar to 6095 are achieved for the specimen with 1.2 mol% Fe2O3 doping sintered at 1200 degrees C for 2 h. (C) 2011 Elsevier B.V. All rights reserved.
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