Ag_2C_2O_4热分解法制备纳米银粉  

Preparation of Nanometer Silver Powder by Ag_2C_2O_4 Pyrogenation

作　　者：魏剑英[1] 韩周祥[1] 赵玛[1] 王军[1] 彭辉[1] 胡季帆[1] 

机构地区：[1]郑州轻工业学院,河南郑州450002

出　　处：《稀有金属材料与工程》2007年第11期2049-2051,共3页Rare Metal Materials and Engineering

摘　　要：利用AgNO3和H2C2O4溶液反应使Ag2C2O4沉淀，分析Ag2C2O4的热分解行为，研究了以Ag2C2O4为前驱体制备纳米银粉的方法。结果表明：在配位剂三乙醇胺和分散剂吐温-80的存在下，利用Ag2C2O4自身的氧化还原特性，在85℃加热10min可得到纳米银。X射线衍射分析证明制备的银粉为面心立方结构的单晶或多晶，透射电镜显示制备纳米银的粒径在4～25nm之间，平均粒径约10nm，粒度分布较为均匀。A preparation method has been presented for nanometer silver powder through the pyrogenation of Ag2C2O4 prepared from AgNO3 and H2C2O4 solution in this paper.. The pyrogenation behaviors of Ag2C2O4 at different mediums are analyzed. The preparation and formation process of nanometer silver are discussed in detail. Results show that nanometer silver powder can be obtained through the self-redox reaction of Ag2C2O4 precursor at the existence of triethanolamine and Tween 80, which is decomposed at 85 ℃ for 10 min. The XRD indicates that the prepared nanometer silver powder is face centered cubic crystals. The TEM images show that the size of the prepared nanometer silver powder is uniformly distributed from 4 nm to 25 nm with a average size of about 10 nm.

关 键 词：银 纳米晶 热分解 

分 类 号：TB383.1[一般工业技术—材料科学与工程]