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Abstract
Reactions at T=600° to 1250°C between nickel oxide and titanium dioxide, metallic nickel and titanium dioxide, and the oxidation of Ni‐TiO2 cermet were studied. The formation of compouuds was observed by temperature‐programmed reduction in hydrogen flow. At T > 600°C, NiTiO3 forms. During the initial stages of the reaction, a solid solution of TiO2 in NiO is formed. The reaction is influenced by anatase‐rutile transformation. The apparent activation energy of the formation of NiTiO3 is considerably lower during the reaction in the mixture of metallic nickel with titanium dioxide (218 kJ°mol‐1 for powder and 255 kJ.mo1‐1 for cermet oxidation) than it is for the reaction between NiO and rutile (385 kJ.mol‐1).
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