Research development of nickel ferrite based cermet inert anode materials

The development of inert anode for aluminum electrolysis is mainly based on the economic and environmental considerations,which is very important for the further development of aluminum electrolysis,and is the key technology of the advanced aluminum electrolysis.Metallic inert anode with good processability,good thermal shock resistance and conductivity,and cermet inert anode combining the high-temperature thermal stability of ceramic and high conductivity,high toughness of metal,have been the primary candidates of inert anode.The engineering researches have been carried out using metallic inert anode and cermet inert anode,respectively.Recent studies focus on the dynamic balance control of the formation and dissolution of the protective film on the metallic inert anode surface,composition and structure optimization of cermet inert anode,the mechanism and suppression techniques of corrosion,and so on.The latest development of the metallic inert anode and cermet inert anode was reviewed,especially the composition optimization,sintering and electrolytic corrosion characteristics of nickel ferrite based cermet were introduced from the materials science perspective.