BULLETIN OF THE KOREAN CHEMICAL SOCIETY vol. 20, no. 2, pp. 195 - 198
KOREAN CHEMICAL SOC
SCI; SCIE; SCOPUS; KCI
The partitionings of NiO and of NiO and TiO2 between hematite and Na2O 2B(2)O(3) melts were studied by the flux growth method as a function of solute concentration. The substitution mechanisms of NiO and/or TiO2 in -Fe2O3 lattice were discussed based on the concentration dependence of the distribution coefficients. The substitution of Ni2+ ion for Fe3+ was accompanied by the charge compensating oxygen ion vacancies, while the coupled substitution of Ni2+ and Ti4+ ions for Fe3+ was accompanied by the formation of Fe2+ ion, which was confirmed by chemical analysis.