微米球形银粉粒径的优化分析  

Optimization on Particle Size of Micron Spherical Silver Powder

作　　者：郑娅[1] 甘国友[1] 严继康[1] 杜景红[1] 易健宏[1] 陈忠文[1] 张磊[1] 

机构地区：[1]昆明理工大学稀贵及有色金属先进材料教育部重点实验室,云南昆明650093

出　　处：《稀有金属材料与工程》2012年第9期1623-1627,共5页Rare Metal Materials and Engineering

基　　金：云南省自然科学基金(2008ZC014M);昆明理工大学分析测试基金(2009-013;2009-016;2009-030;2009-031)

摘　　要：采用化学还原法制备微米银粉且用正交试验对工艺进行了优化。以聚乙二醇(PEG-10000)为分散剂和乙醇为消泡剂,以抗坏血酸在超声波下和碱性环境下直接还原硝酸银得到银溶胶,经过滤、洗涤、恒温干燥处理得到银粉。研究滴加顺序、消泡剂用量、pH值对银粉粒径的影响,利用SEM、XRD对银粉进行分析。结果表明,在0.3mol/L硝酸银溶液和25mL消泡剂乙醇、T=40℃和pH=7条件下,超声波振荡时间10min,可制备粒径1.13μm左右,粒径分布窄的球形银粉。Micro-sized silver power was prepared from AgNO3 power by chemical reduction, and the technique was optimized by orthogonal experiment. The silver sol was obtained from silver nitrate via chemical reduction in ultrasonic wave and alkaline environment using polyethylene glycol （PEG-10000） as dispersant and alcohol as antifoam agent, and after agitation, the sol was filtered, washed and dried at constant temperature to obtain silver powder. Effects of reagents adding order, pH and dosage of alcohol on the silver particle size were investigated. The silver powders were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. Results show that with 0.3 mol/L AgNO3 solution, 25 mL ethanol, T=40℃, pH=7 and 10 rain ultrasonic wave vibration, spherical silver power of about 1.13 μm particle size and narrow particle size distribution was prepared.

关 键 词：化学还原法 分散剂 优化分析 球形银粉 

分 类 号：TB383.1[一般工业技术—材料科学与工程]