Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/25299
Title: Electrical properties of (K 0.5Na 0.5) 1-x Ag xNbO 3 lead-free piezoelectric ceramics
Authors: Xu, C
Lin, D
Kwok, KW 
Issue Date: 2008
Publisher: Springer
Source: Journal of materials science : materials in electronics, 2008, v. 19, no. 11, p. 1054-1057 How to cite?
Journal: Journal of materials science : materials in electronics 
Abstract: (K 0.5Na 0.5) 1-xAg x NbO 3 lead-free piezoelectric ceramics have been fabricated by an ordinary ceramic technique. The results of XRD reveal that Ag + diffuses into the K 0.5Na 0.5 NbO 3lattices to form a new solid solution with an orthorhombic perovskite structure and the solubility of Ag + into A-sites of K 0.5Na 0.5NbO 3 is about 0.20. The ceramics can be well-sintered at 1,100-1,110 °C. The partial substitution of Ag + for A-site ion (K 0.5 Na 0.5) + decreases slightly both paraelectric cubic-ferroelectric tetragonal (T C) and ferroelectric tetragonal-ferroelectric orthorhombic phase transition temperatures (T O-T). The ferroelectricity of the ceramics becomes weak at high Ag + concentration. The ceramic with x = 0.10 possesses optimum electrical properties: d 33 = 135pC/N, k P = 0.43, k t = 0.46, ε r = 470, tanδ = 3.39%, and T C = 394°C.
URI: http://hdl.handle.net/10397/25299
ISSN: 0957-4522
EISSN: 1573-482X
DOI: 10.1007/s10854-007-9458-3
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