Phase Composition of Aluminium Oxides Promoted by Cr, Cu and Ni Additives
Статья (Full article),
Reaction Kinetics and Catalysis Letters
, E-ISSN: 1588-2837
Institute of Catalysis, Novosibirsk 630090, USSR
X-ray diffraction analysis of aluminium oxides promoted by Cr3+, Cu2+ and Ni2+ additives has been carried out in a high-temperature X-ray chamber. It has been revealed that at T=823–1473 K in inert media, solid solutions are formed and transformation to α-Al2O3 takes place differently. Mineralizing action of Cu cations is suggested to be due to the decomposition of Cu2+-containing aluminate to Cu+ aluminate and α-Al2O3. The absence of such action of Cr3+ and Ni2+ is ascribed to the formation of solid solutions and nickel aluminate.