电沉积制备Gd-Co合金膜的研究  

Study on Electrodeposition of Gd-Co Alloy Film

作　　者：陈必清[1] 刘青[1] 王建朝[1] 王金贵[1] 郭承育[1] 

机构地区：[1]青海师范大学化学系,青海西宁810008

出　　处：《稀土》2006年第4期53-58,共6页Chinese Rare Earths

基　　金：国家自然科学基金项目资助(50264004)

摘　　要：在353K的乙酰胺-尿素-N aB r熔体中,P t、Cu电极上,Co(Ⅱ)+2e→Co(0)是一步完全不可逆反应,测得0.060m o l.L-1CoC l2-乙酰胺-尿素-N aB r中,Co(Ⅱ)在P t上,传递系数α=0.28,扩散系数D0=4.68×10-5cm2.-s 1,Cu上α=0.28,D0=4.06×1-0 7cm2.-s 1。G d(Ⅲ)不能单独还原为G d(0),但可以被Co(Ⅱ)诱导共沉积。由恒电位电解法得到非晶态的G d-Co合金,G d的含量随阴极电位的负移,G d(Ⅲ)/N i(Ⅱ)摩尔比增大以及电解时间延长而增大。Electroreduction of Co^2＋to Co in acetamide--urea--NaBr melt on Pt and Cu electrode at 353K is irreversible in one step. On Pt and Cu eletrode the diffusion coefficient and electron transfer coefficient of Co^2＋in 0. 060mol/L CoCl2--acetamide--urea--NaBr melt were determined. The transfer coefficient α= 0. 28 and diffusion co-efficient Do= 4.68 × 10^-5cm^2·s^-1of the Pt eletrode and transfer coefficient α= 0. 28 and diffusion coefficient Do = 4. 06×10^-7cm^2· s^-1 of the Cu eletrode were measured. Gd^3＋ is not reduced to Gd alone , but can be inductively codeposited with Co^2＋. The amorphous Gd-- Co alloy films were obtained by potentiostatic electrolysis . The content of Gd in the Gd-- Co deposits changes with the cathode potential , molar ratio of Gd^3＋/ Ni^2＋ and the electrolysis time.

关 键 词：稀土 诱导共沉积 恒电位电解 乙酰胺-尿素-NABR熔体 Gd—Co合金 

分 类 号：TG132[一般工业技术—材料科学与工程]