关键词: 镁铝尖晶石;方镁石-镁铝尖晶石;添加剂;金属氧化物;稀土氧化物;复合添加剂

Abstract: The effects of metal oxides,rare earth oxides and composite additives on the properties of MA and MgO-MA materials are reviewed. At a certain temperature,the additives can form solid solution with magnesium aluminum spinel,or promote the vacancy concentration of magnesium aluminum spinel crystal and activation lattice,or form low melting point phase with some impurities in the material,leading to promoting sintering and improving the mechanical properties at room temperature. Some additives can also react with some substances in the material producing high melting point phase,blocking the pores, and increasing penetration and corrosion resistance of slag. It is expected to provide some theory basis for properties and microstructure designing and additives choosing of MA and MgO-MA materials.

Key words: magnesium aluminum spinel;magnesia-magnesia alumina spinel;additive;metal oxide;rare earth oxide;compound additive