摘要
研究了ＫＣｌＬｉＣｌ熔体中Ｔｉ（Ⅳ）的电化学还原机理和钛沉积及沉积动力学，计算了各还原步骤传递的电子数。结果表明，Ｔｉ（Ⅳ）的电化学还原为三步电荷传递反应，即：Ｔｉ４＋→Ｔｉ３＋→Ｔｉ２＋→Ｔｉ。Ｔｉ（Ⅳ）的电化学还原速度由离子扩散速度来控制。在一定熔体组成及温度下，沉积物的性质依赖于电解时间及电解电位。在ＫＣｌＬｉＣｌ熔体中阴极电位为５００ｍＶ（相对钼电极），电解时间为４ｈ时，可获得粘附性能好的钛沉积物，并观察到沉积物为细小结晶堆积起来的多孔体。钛的纯度可达９９．９％。
The mechanism of the cathode reduction of Ti(Ⅳ) and the kinetics of the electrodeposition and electrocrystallisation of titanium have been studied in KCl-LiCl melt. The transferred electron numbers of each reduction step were calculated. The results show that the electrochemical reduction of Ti(Ⅳ) proceeds on three steps of charge transfer:Ti(Ⅳ)→Ti(Ⅲ)→Ti(Ⅱ)→Ti(0),The electrochemical reduction rate of Ti(Ⅳ) is controlled by diffusion rate of ions.Under the conditions of constant temperature and composition of the melt, the nature of the deposit depends on the electrocrystallisation time and cathode potential. In KCl-LiCl melt a coherent Ti deposit can be obtained after electrocrystallisation for 4 hours at the cathode potential of500 mV (refered to Mo). And the Ti deposit constructed by fine crystals is porous, but the purity of the Ti deposit is 999%.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
1998年第3期165-168,共4页
Rare Metal Materials and Engineering
关键词
钛离子
电化学还原
氯化物熔体
炼钛
titanium ion, electrochemical reduction, molten choride
