大电流无铜体系银电解过程影响研究  

Study on the influence of silver electrolysis process under the high current and copper-free system

作　　者：常意川 李玉龙 李代颖 谈志卫 吴文飚 Chang Yichuan;Li Yulong;Li Daiying;Tan Zhiwei;Wu Wenbiao(Wuhan Institute of Marine Electric Propulsion,Wuhan 430064,China)

机构地区：[1]武汉船用电力推进装置研究所,武汉430064

出　　处：《船电技术》2023年第10期26-29,共4页Marine Electric & Electronic Engineering

基　　金：2022年黄冈市本级科技创新专项重点Ⅱ类项目(高可靠性银基电接触材料研制及产业化ZDXM20220021)。

摘　　要：针对传统银电解技术能耗高、效率低、铜离子影响大等缺点,以硝酸、硝酸钾、自制硝酸银为电解液成分,以自制可控含杂银锭为阳极银板、钛板为阴极板,在大电流、无铜体系下采用电化学技术制备了高纯度电解银粉,考察了电解液金属离子含量、电解液pH值、电解液温度、电解电流等因素的影响。实验结果表明,当槽电压为5 V、电解周期≥24 h、电流密度>600 A/m^(2)、电解液pH<2、Ag^(+)浓度>150g/L、电解液再循环温度为25~36℃时,本方法制备的高纯度电解银粉优于国标IC-Ag 99.99%要求。Aiming at the disadvantages of the traditional silver electrolysis technology,such as high energy consumption,low efficiency and great influence of copper ions,we take nitric acid,potassium nitrate and self-made silver nitrate as the electrolyte components,take self-made controllable contaminating silver ingot as the anode silver plate and take titanium plate as the cathode plate to prepare high purity electrolytic silver powder by electrochemical technique under the high current and copper-free system.And the effects of metal ion content,pH value,temperature of electrolyte and electrolytic current are investigated.The experimental results show that the high purity electrolytic silver powder prepared by this method is better than the requirements of the national standard IC-Ag 99.99%,when the cell voltage was 5V,the electrolysis cycle≥24h,the current density>600A/m^(2),the pH of electrolyte<2,the concentration of Ag^(+)>150g/L,and the recycling temperature of electrolyte was 25-36℃.

关 键 词：电化学技术 高纯度银 大电流 无铜 

分 类 号：TF832[冶金工程—有色金属冶金]