Physicochemical Research on Molten Salt Electrolysis of Ti and Ti-Al

Ti及Ti-Al熔盐电解物理化学研究

基本信息

批准号：
06452340
负责人：
KAWAKAMI Masahiro
金额：
$ 4.99万
依托单位：
TOYOHASHI UNIVERSITY OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06452340/
关键词：
Ti TiB_2 molten chloride molten fluoroborate elecctrowinning electroplating TiCl_4 H_2 溶融塩電解溶融NaCl-KCl 電解採取電解精製 Ti-Al

项目摘要

The physicochemical research on molten salt electrolysis of Ti and Ti-Al has been carried out. The results is summarized as follows ;1.Electrowinning of Ti in molten chlorideThree electrode reactions have been studied in detail, and the valuable results for the development of more efficient electrowinning process were obtained.(1) Electrodeposition of TiThe dependence of the morphology and purity of Ti deposit and the cathodic current efficiency upon the electrolysis condition was investigated, and the proper condition was specified. Moreover, the effect of fluoride addition in chloride melt on the electrodeposition of Ti was studied.(2) Electro-oxidation of H_2 gasIt was shown that H_2 gas could be oxidized anodically on carbon electrode, and that the electricity of the electrowinning of Ti could be reduced by the use of H_2 oxidation. The dependence of oxidation rate on the electrolysis condition was investigated, and the behavior of reaction product was studied.(3) Partial reduction of TiCl_4The electrochemical partial reduction of TiCl_4 was studied in detail, because it was an effective process for the supply of Ti ion in chloride melt. The effect of the electrolysis condition on reduction rate and reaction product was studied.2.Electroplating of TiB_2The electrode reaction of Ti ion in molten fluoroborate was studied in detail, and it was shown that TiB_2 could be deposited under a suitable condition. The dependence of TiB_2 deposition on electrolysis condition was investigated, and the condition where the good electroplationg layr of TiB_2 was obtained was specified.

开展了Ti和Ti-Al的熔盐电解物理化学研究。主要研究结果如下：1.在熔融氯化物中电积Ti对三种电极反应进行了详细的研究，为开发更高效的电积工艺获得了有价值的成果。（1）Ti的电沉积形貌与纯度的依赖性研究了电解条件下钛沉积物的变化和阴极电流效率，并确定了合适的电解条件。此外,还研究了氯化物熔体中添加氟化物对Ti电沉积的影响。(2)H_2气体的电氧化研究表明,H_2气体在碳电极上发生阳极氧化,电积Ti的电可以通过H_2氧化来还原。研究了氧化速率对电解条件的依赖性,并研究了反应产物的行为。(3)TiCl_4的部分还原TiCl_4的电化学部分还原是一种提供Ti离子的有效过程,因此对其进行了详细的研究。在氯化物熔体中。研究了电解条件对还原率和反应产物的影响。2.TiB_2的电镀详细研究了Ti离子在熔融氟硼酸盐中的电极反应,结果表明在合适的条件下可以沉积TiB_2。研究了TiB_2沉积对电解条件的依赖性,明确了获得良好TiB_2电镀层的条件。