摘要
采用线性电位扫描法、循环伏安法、电导测定及XRD,XPS法等研究了高浓度Bi3+离子存在于酸性CuSO4电解液中对Cu电解精炼阴极过程的影响.研究表明:Bi3+离子的存在减小了电解液的电导率,降低了阴极Cu沉积反应的交换电流密度、极限电流密度和峰电流密度,对Cu沉积反应起极化作用、在通常电流密度200 A·m-2下电解,Bi不会在阴极沉积,但促使Cu沉积的晶面220择优取向更加突出.在高电流密度1000 A·m-2下电解,Bi以Bi2O3形式存在于沉积层中,Cu沉积的晶面择优取向为111.
The effect of high concentration Bi3+ on the cathodic process of copper electrorefin- ing in acidified CuSO4 electrolyte was studied by linear potential sweep method, cyclic voltammetry method, XRD, XPS and conductivity measurements. The results indicate that high concentration Bi3+ could decrease the conductivity of the electrolyte, the exchange current density, the limiting current density and peak current density of copper deposition reaction, so that Bi3+ has an action of polarization on the reaction of copper deposition. When electrolysis was carried out at 200 A·m-2, Bi did not deposit on the cathode, bat made the growth of the preferred orientation 220 of copper crystal more easily.While electrolysis at 1000 A.m-2, Bi existed on the cathode layer in the form of Bi2O3, and Cu 111 crystal face grew preferentially.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第9期966-969,共4页
Acta Metallurgica Sinica
基金
安徽省自然科学基金!98625248
关键词
电解精炼
阴极过程
高浓度铋离子
炼铜
copper electrorefining,bismuth, polarization action, crystal orientation