用Ni(OH)_2浆化氢还原法制备纳米金属镍粉的反应机制　  

PREPARATION OF NANOMETER-SIZED NICKEL POWDERS BY HYDROTHERMAL HYDROGEN REDUCTION OF Ni(OH)_2 SLURRY

作　　者：徐菊[1] 喻克宁[1] 梁焕珍[1] 陶昌源[1] 黎少华[1] 金东镇 郑宪生 

机构地区：[1]中国科学院比工冶金研究所,北京市100080 [2]韩国资源研究所

出　　处：《材料研究学报》2002年第2期158-163,共6页Chinese Journal of Materials Research

基　　金：国家自然科学基金资助项目59874026.

摘　　要：用Ｎｉ（ＯＨ）２浆液水热氢还原法制备了纳米金属镍粉．通过时不同反应阶段样品性质的分析．研究了巨应的机制，结果表明．在酸性条件下．通过复盐离解出的镍离子在溶液中与氢发生反应：在碱性条件下．Ｎｉ（ＯＨ）２固体颗粒直接与活性氢发生反应。The nickel powder samples obtained at different reaction steps of the hydrogen reduction of Ni(OH)2 slurries were examined by XRD, TEM, SEM and other methods. The obvious differences between samplings from acidic medium with pH12 were observed. The mechanism of hydrogen reduction of Ni(OH)2 slurry with pH2+ ions dissociated from basic nickel sulfates like Ni(SO4)0.3(OH)1.4 but for Ni(OH)2 slurry with pH>12 the mechanism was confirmed to be a heterogenous reaction of Ni(OH)2 solid particles and activated hydrogen occurred at the surface of Ni(OH)2.

关 键 词：纳米金属镍粉 NI(OH)2 反应机制 氢氧化镍 

分 类 号：TF123.121[冶金工程—粉末冶金] TB383[冶金工程—冶金物理化学]