Please use this identifier to cite or link to this item: https://doi.org/10.1149/1.3454212
Title: Chemical stability and oxygen permeability of La0.4Ba 0.6Fe1-xZnxO3-δ Perovskite: The effects of Zn substitution
Authors: Gong, Z. 
Yin, X. 
Hong, L. 
Issue Date: 2010
Citation: Gong, Z., Yin, X., Hong, L. (2010). Chemical stability and oxygen permeability of La0.4Ba 0.6Fe1-xZnxO3-δ Perovskite: The effects of Zn substitution. Journal of the Electrochemical Society 157 (8) : E129-E134. ScholarBank@NUS Repository. https://doi.org/10.1149/1.3454212
Abstract: Perovskite oxide, La0.4 Ba0.6 FeO3-δ (LBF), is a typical cobalt-free, mixed ionic-electronic conductor. This work explored B-site doping in LBF by partially substituting iron with Zn, which results in La0.4 Ba0.6 Fe1-x Znx O3-δ (LBFZx). An investigation on the effects of Zn doping was then conducted. The introduction of Zn in LBFZx largely augments the concentration of oxygen lattice vacancies and the chemical resistance against reduction in the H2 (5%) / N2 atmosphere. This conclusion was drawn from the results of X-ray diffraction and temperature-programmed reduction. Furthermore, the O2 temperature-programmed desorption showed us that lattice oxygen desorption is affected by the vacancy concentration and the amount of movable lattice oxygen. The oxygen permeability of the LBFZx membrane increased from 800 to 950°C, with increasing Zn 2+ -doping extent (x-value) from 0 to 0.1, but the improvement discontinued with further increase in the x value from 0.1 to 0.2, namely both LBFZx (x=0.1 and 0.2) membranes presented the same oxygen permeation flux as high as 0.73 mL cm-2 min-1 at 950°C. Nevertheless, perovskite LBFZx with x=0.2 exhibited superior chemical stability in reducing atmosphere at 900°C over that with x=0.1. © 2010 The Electrochemical Society.
Source Title: Journal of the Electrochemical Society
URI: http://scholarbank.nus.edu.sg/handle/10635/88644
ISSN: 00134651
DOI: 10.1149/1.3454212
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

11
checked on Jun 19, 2018

WEB OF SCIENCETM
Citations

11
checked on Jun 19, 2018

Page view(s)

41
checked on May 18, 2018

Google ScholarTM

Check

Altmetric


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