一、前言稀土元素可改善或提高某些有色金属或合金的多种性能,例如,向铝及其合金中添加稀土元素铈时,可以细化合金的铸态组织、提高铸态合金的机械性能、并能提高铝箔合金的耐电压值等;添加稀土元素钇,可以减少 I. Introduction Rare earth elements can improve or enhance the performance of certain non-ferrous metals or alloys. For example, adding rare earth element cerium to aluminum and its alloys can refine the as-cast microstructure of the alloy and improve the mechanical properties of the as-cast alloy , And can improve the withstand voltage of aluminum foil alloys; add rare earth elements yttrium can be reduced