%0 Journal Article
%T Determination of the ionic transport numbers of lanthanum gallate materials by impedance spectroscopy and modified EMF method
%A Pe£¿a-Mart¨ªnez
%A J.
%A Marrero-L¨®pez
%A D.
%A Ruiz-Morales
%A J. C.
%A N¨²£¿ez
%A P.
%J Bolet¨ªn de la Sociedad Espa£¿ola de Cer¨¢mica y Vidrio
%D 2008
%I Sociedad Espa?ola de Cer¨¢mica y Vidrio
%X A combination of impedance spectroscopy and a modified electromotive force method (emf) were used to evaluate the ionic transport numbers and the overall conductivity of several doped lanthanum gallate materials, i.e. La0.9Sr0.1Ga1-xMgxO3-¦Ä (x=0.05-0.30), La0.9A0.1Ga0.8Mg0.2O3-¦Ä (A=Sr, Ba and Ca) and La0.9Sr0.1Ga0.8Mg0.2-yCoyO3-¦Ä (y=0.015 and 0.045). La0.9Sr0.1Ga0.8Mg0.2O2.85 (LSGM) sample showed the maximum ionic transport number in the temperature range 900-1173 K, around 0.99 in both O2/air and H2/air gradients. La conductividad total y los n¨²meros de transporte i¨®nico de las composiciones, basadas en el galato de lantano, La0,9Sr0,1Ga1-xMgxO3-¦Ä (x=0,05-0,30), La0,9A0,1Ga0,8Mg0,2O3-¦Ä (A=Sr, Ba, Ca) y La0,9Sr0,1Ga0,8Mg0,2-yCoyO3-¦Ä (y=0.015; 0,045) fueron estudiadas mediante una combinaci¨®n de t¨¦cnicas de espectroscopia de impedancia compleja y fuerza electromotriz (fem). La composici¨®n La0,9Sr0,1Ga0,8Mg0,2O2,85 (LSGM) presenta el mayor n¨²mero de transporte i¨®nico, concretamente 0,99 en el rango de temperaturas 900-1173 K, tanto en gradiente de O2/aire como de H2/aire.
%K EMF
%K LSGM
%K Ionic conductivity
%K SOFC
%K Transport number
%K Conductividad i¨®nica
%K EMF
%K LSGM
%K N¨²mero de transporte
%K SOFC
%U http://ceramicayvidrio.revistas.csic.es/index.php/ceramicayvidrio/article/view/193/206