Authors: Yanbo Zuo Jianheng Li Qing Zeng Wei Liu Chusheng Chen
Publish Date: 2009/07/07
Volume: 14, Issue: 6, Pages: 945-949
Abstract
The oxygen transport in the nickelzirconia composite was investigated using the oxygen permeation method A diskshaped sample made of nickel 40 vol and yttriastabilized zirconia YSZ was used to construct a permeation cell By exposing one side of the sample to a CO2 gas stream and the other side to a CO stream at elevated temperatures oxide ions were extracted from CO2 and transported to the other side to oxidize CO The oxygen permeation flux through the composite was determined by analyzing the effluent from the permeation cell and the oxygen ionic conductivity of the composite was derived from the permeation data and the oxygen partial pressures It was shown that the oxygen ionic conductivity of the composite YSZ fraction was about one third of that for the singlephase zirconia ceramic and the activation energy associated with the transport of oxide ions in the composite is somewhat greater than that of the singlephase zirconia
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