Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10842
Title: Water-induced degradation in (Bi 1/2Na 1/2)TiO 3 lead-free ceramics
Authors: Gu, YH
Chen, WP
Qi, JQ
Tian, HY
Wang, Y 
Chan, HLW 
Keywords: (Bi 1/2Na 1/2)TiO 3
Degradation
Lead-free
Water
Issue Date: 2009
Source: Journal of electronic materials, 2009, v. 38, no. 10, p. 2207-2210 How to cite?
Journal: Journal of Electronic Materials 
Abstract: Chemical stability of (Bi 1/2Na 1/2)TiO 3 (BNT) ceramics against water was studied through a comparison experiment. Immersion of BNT in 0.01 M NaOH solution showed no noticeable influence, while BNT ceramics were seriously affected when hydrogen was deposited on them through the electrolysis of water in the solution: the capacitance was obviously decreased and the dielectric loss was dramatically increased in the low-frequency range. X-ray diffraction analysis indicated that hydrogen was first dissolved into BNT and then caused decomposition, with some other phases formed. As water-induced degradation is an important cause of degradation for piezoelectric devices, it is important to ensure that the chemical stability of BNT is not decreased when using doping and/or the formation of a solid-state solution with other perovskite-type oxides in order to improve the piezoelectric properties of BNT-based ceramics.
URI: http://hdl.handle.net/10397/10842
ISSN: 0361-5235
DOI: 10.1007/s11664-009-0892-2
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