NaCl-KCl-Na2WO4-CuO体系电解制备钨铜复合粉体研究
来源期刊：有色金属科学与工程2012年第5期
论文作者：王旭 廖春发 肖志华
文章页码：34 - 38
关键词：熔盐电解;钨铜合金;电极过程;槽电压
Key words：molten salt electrolysis; tungsten-copper alloy; electrode process; cell voltage
摘 要：文中研究采用熔盐电解以由Na2WO4和CuO为活性物质电解获得钨铜合金复合前驱粉体.通过循环伏安法对电解质体系及电极过程进行定性分析认为Na2WO4减缓体系活性物质扩散速度，CuO与Na2WO4的电解非同步进行.通过改变活性物质的加入方式进行对比实验，结果表明：在温度750 ℃；以一定比例KCl-NaCl混合熔盐为电解质，在起始槽电压1 V，先加入CuO电解2 h；后加入Na2WO4，调整槽电压至2 V电解3 h，对产物进行X射线衍射（XRD）和扫描电镜（SEM）及能谱分析（EDS）表明，可以获得纯度达到98 %的W-Cu合金粉体.
Abstract: Thermodynamic properties of electrolysis process were studied by cyclic voltammetry. The results show that the electrode reactions in the stable electrolysis region are irreversible. The diffusion velocity of Na2WO4 is an important factor of restricting electrolysis rate. CuO was added into the KCl-NaCl mixed salt electrolyte and cell voltage 1 V for 2 h at the temperature of 750 ℃. Then Na2WO4 was added and cell voltage 2 V for 3 h. X-ray diffraction（XRD）and Scanning Electron Microscope（SEM）and EDS show that tungsten-copper alloy powder can be prepared cathode and purity can achieve 98 % .
