Abstract
IR spectroscopic and X-ray studies of variations in the composition of Ni, Cu and (Ni+Cu) ammonium chromates under thermal treatment show that the Ni−Cr system consists of spinel and NiO, and Cu−Cr systems consist of the spinel CuCr2O4 only. In mixed Ni−Cu−Cr systems part of Ni- and Cu-containing components remain independent and part of them form common Ni+Cu phases.
Abstract
Методами ИКС и РФА прослежено изменение состава образцов Ni-, Cu- и (Ni+Cu)-аммиачных хроматов при термообработке. Показано, что Ni−Cr система содержит шпинель и NiO, а Cu−Cr — шпинель CuCr2O4. В смешанных Ni−Cu−Cr системах часть Ni- и Cu-содержащих компонент ведет себя независимо, а часть образует совместные Ni+Cu фазы.
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References
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Yurchenko, E.N., Zubritskaya, N.G., Korolkova, O.G. et al. Development of phase composition for mixed Ni−Cu chromite catalysts. Conversions under calcination. React Kinet Catal Lett 44, 223–228 (1991). https://doi.org/10.1007/BF02068410
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DOI: https://doi.org/10.1007/BF02068410