稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2015年
7期
776-782
,共7页
曲瑞%江奕东%徐霸津%丁晶晶%廖成%凌国平
麯瑞%江奕東%徐霸津%丁晶晶%廖成%凌國平
곡서%강혁동%서패진%정정정%료성%릉국평
neodymium%ionic liquid%AlCl3-1-ethyl-3-methyl-imidazolium chloride%anodic process%viscous layer%rare earths
The anodic behavior of neodymium in acidic AlCl3-1-ethyl-3-methyl-imidazolium chloride (AlCl3-EMIC) ionic liquid was investigated by conducting linear sweep voltammeter and chonopotentiometry. The viscosity of Nd dissolved ionic liquid and the surface morphologies of Nd were characterized using an Ostwald viscometer and a scanning electron microscope, respectively. The chemical composition of Nd surface was indentified by Raman spectra. The results showed that dissolution of Nd under anodic po-larization occurred after the breakdown of oxide films. A viscous layer formed at the interface of Nd/ionic liquid during the gal-vanostatic process of 5 and 20 mA/cm2. The formation of viscous layer was attributed to the accumulation of Nd dissolved AlCl3-EMIC ionic liquid, which had high viscosity. The oxide films could be removed thoroughly and the surface of Nd was homo-geneous without etching pits, when viscous layer formed in the anodic process. Otherwise, the surface showed a pitting morphology.