透氧膜法由氧化物直接制备CeNi_5的影响因素及其机理  

Influence Factor and Reaction Mechanism of Direct Preparation of CeNi_5 by Solid-oxygen-ion Conducting Membrane Process from Oxide Precursors

作　　者：赵炳建[1] 袁辉[1] 司新国[1] 鲁雄刚 

机构地区：[1]唐山钢铁集团有限责任公司,唐山063016 [2]上海市现代冶金与材料制备重点实验室,上海200072

出　　处：《材料科学与工程学报》2016年第6期861-866,共6页Journal of Materials Science and Engineering

基　　金：国家重点基础研究发展计划资助项目(2007CB613606);国家863资助项目(2006AA06Z124)

摘　　要：本文研究了利用固体透氧膜(SOM)法直接电解混合氧化物NiO-CeO_2制备CeNi_5合金过程中,样品粒度和烧结温度对电解效果的影响,利用循环伏安法结合前期工作中电解中间产物的组成分析了反应机理。结果表明:样品粒度越小越有利于形成CeNi_5;烧结温度越低,烧结片孔隙率越大,电解效果越好,但烧结温度低于800℃会导致电解过程中样品粉化;循环伏安曲线表明,还原过程分两步进行。Direct preparation of CeNi_5 alloy from NiO-CeO_2 was demonstrated,and the influence of some parameters such as particle size of the oxide powder and sintering temperature on the process and sample quality were investigated.The reaction mechanism of the process was researched by cyclic voltammograms plot and phase compositions of intermediate products.The results show that the smaller particle size of oxide powder favors the formation of CeNi_5 alloy;the pellet sintered at lower temperature can be deoxidized into purer product.Pellet will be pulverized in electrolysis process if the sinter-temperature is lower than 800℃.The cyclic voltammograms plots show that reduction can be divided into two steps.

关 键 词：透氧膜 电解 氧化物 合金 

分 类 号：TB34[一般工业技术—材料科学与工程]