The microstructures of Cu-Zn powder under different annealing conditions were studied. 研究了铜锌粉末在不同退火工艺下的显微组织变化。
In this paper the preparation method of surperpurity europium oxide by zinc powder reduction extraction chromatography is expouned. 简述了采用锌粉还原萃取色层法制取超高纯氧化铕的工艺过程。
