Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26431
Title: Hydrogen-induced resistance degradation in NiCuZn ferrites
Authors: Chen, WP
Wang, J
Wang, DY
Wang, Y 
Qi, JQ
Chan, HLW 
Keywords: Degradation
Ferrite
Hydrogen
Resistance
Issue Date: 2004
Source: Physica B : Condensed matter, 2004, v. 353, no. 1-2, p. 41-45 How to cite?
Journal: Physica B: Condensed Matter 
Abstract: Hydrogen-induced resistance degradation in Ni0.38Cu 0.12Zn0.50Fe2O4 ceramic pellets was studied through an electrochemical hydrogen charging method, in which the silver electrodes of the pellets acted as a cathode in 0.01 M NaOH solution to evolve hydrogen by the electrolysis of water. The resistance of the pellets was decreased by several orders of magnitude and X-ray diffraction showed that no gross structure changes occurred in the lattice. The degradation could be mostly recovered through heat treatment in N2. It was proposed that hydrogen generated by the electrolysis of water was incorporated into the ferrite lattice and reduced Fe3+ partially to Fe2+. The stability of hydrogen in ferrites decreased with increasing temperature and its outdiffusion resulted in recovery. Hydrogen-induced resistance degradation occurs in ferrites-based components in fabrication and in operation.
URI: http://hdl.handle.net/10397/26431
ISSN: 0921-4526
DOI: 10.1016/j.physb.2004.08.024
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