Transport properties and thermal expansion of perovskite-like La0.3Sr0.7Fe(Al,Cr)O3-delta ceramics
authors Yaremchenko, AA; Kharton, VV; Shaula, AL; Patrakeev, MV; Marques, FMB
nationality International
journal JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
author keywords ionic conductivity; thermal expansion; ferrites; perovskites; membranes
keywords OXYGEN-TRANSPORT; IONIC TRANSPORT; ELECTROLYTE; PERMEATION; MEMBRANES
abstract The use of perovskite-like (Sr,La)FeO3-delta as ceramic membrane materials requires extensive doping in order to increase stability and to suppress thermal and chemical induced expansion. The substitution of iron with aluminum and chromium in La0.3Sr0.7Fe1-x-yAlxCryO3-delta (x=0-0.4; y=0-0.2) was found to decrease total conductivity, oxygen permeability and thermal expansion coefficients. The oxygen ion transference. numbers of La0.3Sr0.7Fe(Al,Cr)O3-delta, determined by faradaic efficiency measurements in air, vary in the range 10(-4) to 10(-2) at 1073-1223 K, increasing with temperature. The incorporation of chromium into perovskite lattice enhances the low-p(O-2) stability down to oxygen partial pressures of 2 x 10(-15) to 2 x 10(-14) Pa at 1173-1223 K. The solid solution formation is, however, limited to the values of x approximate to 0.30-0.35 and y approximate to 0.07-0.08. (c) 2005 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0955-2219
year published 2005
volume 25
issue 12
beginning page 2603
ending page 2607
digital object identifier (doi) 10.1016/j.jeurceramsoc.2005.03.110
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000230569300130
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 4.495
5 year journal impact factor 4.283
category normalized journal impact factor percentile 98.214
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg