期刊
CERAMICS INTERNATIONAL
卷 39, 期 8, 页码 9121-9124出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.05.009
关键词
Electrical properties; Lead-free ceramics; Phase transition; Relaxor ferroelectrics
资金
- Natural Science Foundation of Anhui Province [1108085J14]
- National Natural Science Foundation of China [51272060]
Lead-free relaxor ferroelectric ceramics (1-x)(K0.5Bi0.5)TiO3-xBi(Ni0.5Ti0.5)O-3 were prepared by a conventional solid-state route, the phase transition behavior and corresponding electrical properties were investigated. A typical morphotropic phase boundary (MPB) between rhombohedral and tetragonal ferroelectric phases was identified to be in the range of 0.05 < x < 0.07 where the optimum piezoelectric and electromechanical properties of d(33)=126 pC/N and k(P)=18% were achieved. Most importantly, a high Curie temperature similar to 320 degrees C, around which the material shows a typical relaxor ferroelectric behavior characterized by the presence of diffuse phase transition and frequency dispersion, was obtained in MPB compositions, significantly higher than those of some existing MPB lead-free titanate systems. These results demonstrate a tremendous potential of the studied system for device applications. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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