期刊
CERAMICS INTERNATIONAL
卷 35, 期 8, 页码 3253-3258出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2009.05.018
关键词
Piezoelectric properties; Niobates; Ta-doping
资金
- National Nature Science Foundation of China [50402022, 50672006]
- Program for New Century Excellent Talents in University [NCET-07-0071]
Ta-doping K0.5Na0.5Nb1-xTaxO3 (x = 0.1, 0.2, 0.3, 0.4) powder was synthesized by hydrothermal approach and its ceramics were prepared after sintering and polarizing treatment in this work. The K0.5Na0.5Nb0.7Ta0.3O3 ceramics near morphotropic phase boundary (MPB), which exhibited optimum piezoelectric properties of d(33) = 210 pC/N and good electromechanical coupling factors of K-p = 0.3. The domain structure has been observed from TEM images which indicates that the K0.5Na0.5Nb0.7Ta0.3O3 ceramics have good piezoelectric and ferroelectric properties for it is near the MPB. (C) 2009 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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