Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34731
Title: Degradation mechanism of ZnO ceramic varistors studied by electrochemical hydrogen charging
Authors: Chen, WP
Wang, Y 
Peng, Z
Chan, HLW 
Keywords: Varistor
ZnO
Degradation
Water
Hydrogen
Electrochemical
Issue Date: 2003
Publisher: Japan Society of Applied Physics
Source: Japanese journal of applied physics, 2003, v. 42, no. 1A/B, p. L48-L50 How to cite?
Journal: Japanese journal of applied physics
Abstract: The degradation mechanism of ZnO-based ceramic varistors was investigated by electrochemical hydrogen charging, in which ZnO ceramics were placed in 0.01 M NaOH solution to evolve hydrogen on them by electrolysis of water. After the treatment, the conductivity of the ZnO ceramics was greatly increased and the temperature dependence of resistivity changed from negative temperature coefficient (NTC) type to metallic type. X-ray diffraction analysis showed that ZnO was reduced to Zn at ambient temperature. It was proposed that the reduction of ZnO-based grains by atomic hydrogen at ambient temperature causes the degradation of ZnO-based ceramic varistors.
URI: http://hdl.handle.net/10397/34731
ISSN: 0021-4922
DOI: 10.1143/JJAP.42.L48
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

WEB OF SCIENCETM
Citations

16
Last Week
0
Last month
Citations as of Feb 20, 2017

Page view(s)

20
Last Week
1
Last month
Checked on Feb 19, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.