期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 664, 期 -, 页码 503-509出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.12.256
关键词
(K, Na)NbO3; Lead-free; Piezoelectric ceramics; R-T phase boundary; High density
资金
- Natural Science Foundation of China [51332009]
A newly designed system of e (K-0.48,Na-0.52)(0.95)Li0.05SbxNb(1-x)O3- 0.05Ca(0.5)(Bi-0.5,Na-0.5)(0.5)ZrO3 (KNLSxN-CBNZ) lead-free ceramics were prepared by conventional solid state reaction method. Effects of antimony (Sb) content on their phase structure, microstructure, electrical properties and sinterability were systematically studied. It is found that ceramics with 0.06 <= x <= 0.08 possess a rhombohedral-tetragonal (R-T) phase boundary, as confirmed by the results of temperature dependence of dielectric properties and X-ray diffraction patterns. In addition, the ceramic with x = 0.06 has optimum piezoelectric properties (d(33) = 267 pC/ N, k(p) = 45.2%, epsilon(r) = 1836, tan delta = 3.32%, T-c = 253 degrees C) with a quite high density (rho = 4.63 g/cm(3)). As a result, we believe that the ceramic system is a promising lead-free piezoelectric candidate for practical applications. (C) 2016 Elsevier B.V. All rights reserved.
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