Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10629566 | Journal of the European Ceramic Society | 2015 | 7 Pages |
Abstract
The effects of partial substitution of cobalt in SrCo0.8Fe0.2O3âδ (SCF) by W6+ cations on the crystal structure, microstructure and oxygen flux of the new membrane materials are systematically investigated using XRD, HREM and oxygen permeation studies. Doping of SCF by tungsten (x â¥Â 0.03) results in the endotaxial growth of nanosized Sr2CoWO6 domains distributed in the matrix of nonstoichiometric perovskite. The obtained dependencies of oxygen fluxes across SCFW membranes on temperature (650 â¤Â T â¤Â 950 °C), oxygen partial pressure, thickness (1.65 â¤Â L â¤Â 2.55 mm) and surface modification indicate that oxygen permeation process is controlled by both surface exchange reactions and bulk oxygen diffusion. Tungsten-substituted SCF membrane materials possess an improved performance in the presence of carbon dioxide.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
E.V. Artimonova, O.A. Savinskaya, A.P. Nemudry,