Synthesis and characterization of CuFeO2+d delafossite powders

Emmanuelle Mugnier (1) , Antoine Barnabé (1) , Philippe Tailhades (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

Effects of oxygen off-stoichiometry have been investigated on CuFeO2+d delafossite-type powders prepared by solid state reaction. Materials annealed at different temperatures under air atmosphere were compared. Thermogravimetric analysis coupled with X-ray structural analysis showed that a powdered CuFeO2 can be oxidized up to CuFeO2+d with d =0.18. Electrical measurements confirm the existence of oxidized CuFeO2+d phases. Particular attention is paid to the correlation between oxidation process and phase stabilities in the CuFeO2 and copper spinel phase system.

Mots clés: Delafossite; Copper iron oxide; Non-stoichiometry; Spinel; Ferrite

Domaines: Matériaux

Emmanuelle Mugnier, Antoine Barnabé, Philippe Tailhades. Synthesis and characterization of CuFeO2+d delafossite powders. Solid State Ionics, 2006, 177 (5 - 6), pp.607-612. ⟨10.1016/j.ssi.2005.11.026⟩. ⟨hal-03596308⟩