Material for a dimensionally stable anode for the electrowinning of aluminum

摘要

A material suitable for use as the active anode surface in the electrolytic reduction of alumina to aluminium metal defined by the formula: A_1+xB_1+δC_dO₄ where A is a divalent cation or a mixture of cations with a relative preference for octahedral coordination, B is a trivalent cation or mixture of cations with a relative preference for tetrahedral coordination, C is a trivalent cations with a relative preference for octahedral coordination or a four-valent cation with a relative preference for octahedral coordination, O is the element oxygen: When C is trivalent x=0, 0.8d1, δ0.2 and x+d+d is essentially equal to 1. When C is four-valent 0.4x0.6, 0.4d0.6, δ0.2 and x+d+δ is essentially equal to 1.