Investigation of the Functional Characteristics of Perovskites SrCo0.8 - xFe0.2NbxO3 - z
A. S. Kozhemyachenko, A. P. Nemudry
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences
nemudry@solid.nsc.ru
Keywords: perovskites, oxygen-permeable membranes, thermochemical stability, electrochemical oxidation, oxygen transport
Pages: 649-655
Abstract
Single-phase membrane materials having the composition SrCo0.8 - xNbxFe0.2O3 - z were obtained. The effect of doping with niobium on thermal stability and transport characteristics of the obtained compounds was studied. It was shown that the isomorphous substitution of cobalt ions with highly charged Nb5+ cations causes an increase in thermal stability of the compounds under investigation in the reductive atmosphere and suppression of the phase transition perovskite - brownmillerite, which is accompanied by acceptable decrease in oxygen permeability.
|
