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https://doi.org/10.1016/S1006-7191(08)60022-8

has been cited by the following article:

• TITLE: Electrochemical Degradation Mechanism of a Cermet Anode for Aluminum Production

  AUTHORS: P. Meyer, L. Massot, M. Gibilaro, S. Bouvet, V. Laurent, A. Marmottant, P. Chamelot

  KEYWORDS: Metal/Oxide Electrode, Aluminium Electrolysis, Oxidation Reaction Mechanism

  JOURNAL NAME: Materials Sciences and Applications, Vol.10 No.9, September 19, 2019

  ABSTRACT: Tests on (NixFeyO4 - Ni1?xFexO)/(CuxNiyFez) cermets, considered as promising anode for the aluminium production, were performed under electrolysis at 0.8 A·cm-2 in molten mixture of cryolite at 960°C. In order to predict phase compositions, a thermodynamic study was performed and experimentally verified by SEM-EDS analysis. The metallic phase oxidation leads to the formation of different phases such as FeF2, Ni0.90Fe0.10O, NiF2 and Cu2O phases, while NixFe3-xO4 spinel is continuously enriched up to x = 0.90, the thermodynamically stable nickel composition. When the cermet material is fully oxidized, metallic and oxide phases are converted into soluble or non-conductive phases, leading to the end of anode service life.