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Title: Water-induced degradation in lead zinc niobate-lead zirconate titanate soft piezoelectric ceramics
Authors: Jiang, XP
Chen, WP
Peng, Z
Zeng, M
Chan, HLW 
Yin, QR
Issue Date: 2005
Publisher: Chinese Physical Society
Source: Chinese physics letters, 2005, v. 22, no. 5, p. 1239-1242 How to cite?
Journal: Chinese physics letters 
Abstract: Water-induced degradation of lead zinc niobate–lead zirconate titanate (Pb(Zn1/3Nb2/3)O3–Pb(ZrTi)O3) soft piezoelectric ceramics is studied using electrochemical hydrogen charging, in which the silver electrodes of the piezoelectric ceramics constitute a cathode in 0.01-M NaOH solution to evolve hydrogen by electrolysis of water. It is found that with the increasing hydrogen charging time, the resonance impedance increases, the difference between the resonance frequency and the anti-resonance frequency decreases, the spontaneous polarization, the remanent polarization and the piezoelectric coefficient d33 decrease. The degradation behaviour of the soft piezoelectric ceramics can be explained to hydrogen incorporating into the lattice and forming hydroxy (OH−) bonds in the perovskite structure, which prevents the Ti ions from switching and increases the coercive field Ec. The degradation characteristics of the soft piezoelectric ceramics are quite different from that of lead zirconate titanate hard piezoelectric ceramics.
ISSN: 0256-307X
EISSN: 1741-3540
DOI: 10.1088/0256-307X/22/5/060
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