Localization of carbon and its influence on the transport properties of oxides

Abstract In this study electrical conductivity measurements have allowed us to show the effect of carbon on the transport properties of alumina and cobaltous oxide samples. The effect of the CO/CO 2 mixture in equilibrium with the samples has been detected only when the material is doped and when the solute forms a second phase in the material. XPS analysis have shown the presence of carbon bound to titanium in titanium-doped alumina. This set of results suggests that carbon reacts with the precipitate phase.