Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/18001
Title: Ferroelectric and piezoelectric properties of new NaNbO3-Bi0.5K0.5TiO3 lead-free ceramics
Authors: Lin, D
Kwok, KW 
Issue Date: 2010
Publisher: Springer
Source: Journal of materials science : materials in electronics, 2010, v. 21, no. 10, p. 1060-1065 How to cite?
Journal: Journal of materials science : materials in electronics 
Abstract: New lead-free ceramics (1-x)NaNbO3-xBi(0.5)K(0.5)TiO(3) have been fabricated by the conventional ceramic sintering technique, and their ferroelectric and piezoelectric properties have been studied. The results of X-ray diffraction reveal that Bi0.5K0.5TiO3 diffuses into the NaNbO3 lattices to form a new perovskite-type solid solution with orthorhombic symmetry. The addition of a small amount of Bi0.5K0.5TiO3 (x a parts per thousand yen 0.025) transforms the ceramics from antiferroelectric to ferroelectric. The ceramic with x = 0.10 possesses the largest remanent polarization P (r) and thus exhibits the optimum piezoelectric properties, giving d (33) = 71 pC/N, k (p) = 16.6% and k (t) = 39.7%. The ceramics with low doping level of Bi0.5K0.5TiO3 are normal ferroelectrics and the ferroelectric-paraelectric phase transition becomes diffusive gradually with the doping level x of Bi0.5K0.5TiO3 increasing. Our results show the (1-x)NaNbO3-xBi(0.5)K(0.5)TiO(3) ceramics is one of the good candidates for lead-free piezoelectric and ferroelectric materials.
URI: http://hdl.handle.net/10397/18001
ISSN: 0957-4522
EISSN: 1573-482X
DOI: 10.1007/s10854-009-9998-9
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