Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34735
Title: Hydrogen-induced degradation in CaCu3Ti4O12 ceramics
Authors: Chen, WP
Xiang, W
Guo, MS
You, WC
Zhao, XZ
Chan, HLW 
Keywords: Degradation
Hydrogen
Dielectric
Ceramics
Issue Date: 2006
Publisher: Elsevier Ltd
Source: Journal of alloys and compounds, 2006, v. 422, no. 1-2, p. L9-L12 How to cite?
Journal: Journal of alloys and compounds
Abstract: Hydrogen-induced degradation in CaCu3Ti4O12 (CCTO) ceramics was studied using an electrochemical hydrogen charging method, in which the silver electrodes of CCTO ceramic pellets were made a cathode in 0.01 M NaOH solution to deposit hydrogen through the electrolysis of water. The dielectric loss was greatly increased and the insulation resistance was greatly decreased after the treatment. X-ray diffraction analysis showed that no new phases were formed. It is proposed that atomic hydrogen is diffused into CCTO lattice and free electrons are formed through the ionization of hydrogen atoms, which lead to the observed degradation. Hydrogen-induced degradation occurs very quickly in CCTO ceramics and it is important to prevent hydrogen-induced degradation in CCTO ceramics.
URI: http://hdl.handle.net/10397/34735
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2005.12.013
Appears in Collections:Journal/Magazine Article

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