Electrochemical studies of titanium in fluoride-chloride molten salts
Electrochemical studies of titanium in fluoride-chloride molten salts
复制标题
钛在氟化物-氯化物熔盐中的电化学研究
DOI：
10.1007/bf01016208
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发表时间：
1988
影响因子：
2.9
通讯作者：
T. Oki
中科院分区：
文献类型：
--
作者：
C. Guang;M. Okido;T. Oki
采用电化学和物理测量方法研究了973 K时Ti与Ti ~（4+）离子（K2 TiF 6）的相互作用、Ti ~（4+）离子的电还原反应以及Ti在KCl−NaCl−KF熔体中与K2 TiF 6的阳极反应。在KF含量小于3wt%的KCl−NaCl-3wt%K2TiF6熔盐体系中，反应按Ti 4 ++Ti= 2 Ti 2+进行。当KF含量大于10wt%时，发生3 Ti ~（4+）+Ti= 4 Ti ~（3+）反应，在含氟离子较少的熔盐中，Ti ~（4+）（K_2TiF_6）离子的电化学还原按Ti ~（4+）+e= Ti ~（3+），Ti ~（3 ++）+e= Ti ~（2+），Ti ~（2+）+2e=Ti三步进行。当F ~（3+）浓度较高时，可分为两步还原，即Ti ~（4 ++）e= Ti ~（3+），Ti ~（3 ++）3e =Ti。
The interaction between titanium and Ti4+ions (K2TiF6), the electroreduction reaction of Ti4+ions and the anodic reaction of Ti in KCl−NaCl−KF melts with K2TiF6at 973 K were studied by means of electrochemical and physical measurements. It was found that the fluoride ions played a very important role in these reactionsIn KCl−NaCl-3 wt % K2TiF6molten salts with less than 3 wt % KF, the interaction reaction was considered to proceed as Ti4++Ti=2Ti2+. If the bath contained more than 10 wt% KF, the reaction 3Ti4++Ti=4Ti3+occurred.The electrochemical reduction of Ti4+(K2TiF6) ions in the molten salts with less fluoride ions was observed to proceed according to three reaction steps, i.e. Ti4++e=Ti3+, Ti3++e=Ti2+, Ti2++2e=Ti. In the case of the fluoride ion concentration being higher, two reduction steps, i.e. Ti4++e=Ti3+, Ti3++3e=Ti were suggested.