超高纯银的制备研究  

Study on Preparation of Super-Pure Silver

作　　者：刘丹 李轶轁 贺昕 熊晓东[1,2] 

机构地区：[1]有研亿金新材料有限公司北京市高纯金属溅射靶材工程技术研究中心,北京102200 [2]北京有色金属研究总院,北京100088

出　　处：《贵金属》2015年第3期37-41,共5页Precious Metals

基　　金：国家科技支撑计划(2012BAE06B06)

摘　　要：采用电解精炼法制备6N超高纯银,考察了银浓度、电流密度、电流分布、反应温度等因素对银粉颗粒大小及纯度的影响,并通过理论分析选择了201、D301弱碱性阴离子树脂进行电解液净化除杂。采用SEM对银粉形貌进行了表征,并用GDMS对银粉杂质成分进行了分析。结果表明,控制电解液中的银含量在500-540 g/L,电流密度600-1000 A/m^2,温度为30-40℃,同极极间距为10 cm,多孔钛网作阴极,可以得到总杂质含量小于1×10^-6的6N超高纯银。6N super-pure silver was prepared by the electrolytic refining method; the factors that influence the silver particle size and purity, such as the silver concentration, the current density, the current distribution, and reaction temperature were discussed. 201, D301 ion exchange resins were selected for electrolyte purification impurity by theoretical analysis, the silver powder morphology was characterized by SEM, and the impurities were analyzed by GDMS. The results showed that 6N super-pure silver in which the total content of impurities was less than 1× 10^-6 could be obtained by the following conditions, the silver content in the electrolyte was 500-540 g/L, the current density was 600-1000 A/m^2, the temperature was 30-40℃, and the homopolar distance was 10 cm, the porous titanium mesh was used as the cathode.

关 键 词：有色金属冶金 高纯银 电解精炼 离子交换 辉光放电质谱法 

分 类 号：TF114[冶金工程—冶金物理化学]