Oxygen permeability of mixed-conducting composite membranes: effects of phase interaction
authors Shaula, AL; Kharton, VV; Marques, FMB; Kovalevsky, AV; Viskup, AP; Naumovich, EN
nationality International
journal JOURNAL OF SOLID STATE ELECTROCHEMISTRY
author keywords mixed conductor; oxygen permeation; oxide composite; ionic conductivity; phase interaction
keywords SEPARATION MEMBRANES; ELECTRONIC CONDUCTION; ELECTRICAL-PROPERTIES; PERMEATION PROPERTIES; BISMUTH OXIDE; TRANSPORT; GAS; MICROSTRUCTURE; ELECTROLYTES
abstract Composite ceramic membranes, based on selected combinations of ionic conductors ((La0.9Sr0.1)(0.98)Ga0.8Mg0.2O3-delta-LSGM or Ce0.8Gd0.2O2-delta-CGO) and electronic/mixed conductors (La2Ni0.8Cu0.2O4+delta-LNC, La0.8Sr0.2Fe0.8Co0.2O3-delta-LSFC, La0.7Sr0.3MnO3-delta-LSM, and SrCoO3-delta-Sr2Fe3O6.5 +/-delta-SCSF), were processed and characterized aiming at the identification of key features to be considered in the design and optimization of materials performance as mixed conductors. Although after almost complete reaction between constituents, the best permeability was observed for the LSGM/LSFC combination processed under moderate firing conditions. Ceria-based composites, while preserving a typical composite microstructure, and suffering small compositional changes due to interaction between constituents, behaved always below the result of an ideal combination of the best characteristics of the individual components. Materials interaction, from modest compositional changes to formation of new phases, with deep changes in nominal composition, can be understood both as a challenge requiring proper identification of ideal processing conditions for phase preservation, but also as an opportunity for the development of entirely new composites and materials with compositional heterogeneities at grain size level.
publisher SPRINGER
issn 1432-8488
year published 2006
volume 10
issue 1
beginning page 28
ending page 40
digital object identifier (doi) 10.1007/s10008-005-0650-1
web of science category Electrochemistry
subject category Electrochemistry
unique article identifier WOS:000233482300005
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 2.509
5 year journal impact factor 2.348
category normalized journal impact factor percentile 51.786
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg