Btissem Malek, J. Serp, F. Doreau, M. Miguirditchian, M. Vandenhende, N. Pradeilles, Y. Lepetitcorps, A. Maître
{"title":"氧化钛阳极熔盐电积法制备金属钛","authors":"Btissem Malek, J. Serp, F. Doreau, M. Miguirditchian, M. Vandenhende, N. Pradeilles, Y. Lepetitcorps, A. Maître","doi":"10.3390/materproc2021005063","DOIUrl":null,"url":null,"abstract":"The electrochemical behavior of Ti3+ in LiCl-LiF-TiF3 salt was investigated by cyclic and square wave voltammetries at 853 K. Both methods confirm the presence of a single reduction wave of Ti3+ ions to metal, at a potential of −2.3 V vs. Cl2/Cl−. The closeness of the potentials of TiCxOy dissolution and Ti3+/Ti4+ wave is an issue during the electrorefining of the anode. A low current density has to be applied to stay within the titanium oxycarbide dissolution and avoid the formation of Ti4+. The titanium deposition was studied by electrorefining of a titanium metal plate in LiCl-LiF-TiF3 (0.62 mol/kg). The cathodic deposit analysis by XRD and SEM confirms the formation of titanium metal with an average grain size of 150 µm. The faradic deposition yields are above 85% and constant between 60 and 160 mA/cm2.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"39 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Production of Metallic Titanium by Electrowinning in Molten Salts of Titanium Oxycarbide Anode\",\"authors\":\"Btissem Malek, J. Serp, F. Doreau, M. Miguirditchian, M. Vandenhende, N. Pradeilles, Y. Lepetitcorps, A. Maître\",\"doi\":\"10.3390/materproc2021005063\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The electrochemical behavior of Ti3+ in LiCl-LiF-TiF3 salt was investigated by cyclic and square wave voltammetries at 853 K. Both methods confirm the presence of a single reduction wave of Ti3+ ions to metal, at a potential of −2.3 V vs. Cl2/Cl−. The closeness of the potentials of TiCxOy dissolution and Ti3+/Ti4+ wave is an issue during the electrorefining of the anode. A low current density has to be applied to stay within the titanium oxycarbide dissolution and avoid the formation of Ti4+. The titanium deposition was studied by electrorefining of a titanium metal plate in LiCl-LiF-TiF3 (0.62 mol/kg). The cathodic deposit analysis by XRD and SEM confirms the formation of titanium metal with an average grain size of 150 µm. The faradic deposition yields are above 85% and constant between 60 and 160 mA/cm2.\",\"PeriodicalId\":18729,\"journal\":{\"name\":\"Materials Proceedings\",\"volume\":\"39 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-12-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Proceedings\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.3390/materproc2021005063\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Proceedings","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3390/materproc2021005063","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
采用循环伏安法和方波伏安法研究了Ti3+在LiCl-LiF-TiF3盐中的电化学行为。两种方法都证实了Ti3+离子对金属的单一还原波的存在，电位为−2.3 V vs. Cl2/Cl−。在阳极电精炼过程中，TiCxOy溶解电位与Ti3+/Ti4+波的密切性是一个问题。必须施加低电流密度以保持钛氧碳化物的溶解并避免Ti4+的形成。用0.62 mol/kg的LiCl-LiF-TiF3电解精炼钛金属板，研究了钛的沉积过程。通过XRD和SEM的阴极沉积分析，证实形成了平均晶粒尺寸为150µm的钛金属。法相沉积产率在85%以上，稳定在60 ~ 160 mA/cm2之间。
Production of Metallic Titanium by Electrowinning in Molten Salts of Titanium Oxycarbide Anode
The electrochemical behavior of Ti3+ in LiCl-LiF-TiF3 salt was investigated by cyclic and square wave voltammetries at 853 K. Both methods confirm the presence of a single reduction wave of Ti3+ ions to metal, at a potential of −2.3 V vs. Cl2/Cl−. The closeness of the potentials of TiCxOy dissolution and Ti3+/Ti4+ wave is an issue during the electrorefining of the anode. A low current density has to be applied to stay within the titanium oxycarbide dissolution and avoid the formation of Ti4+. The titanium deposition was studied by electrorefining of a titanium metal plate in LiCl-LiF-TiF3 (0.62 mol/kg). The cathodic deposit analysis by XRD and SEM confirms the formation of titanium metal with an average grain size of 150 µm. The faradic deposition yields are above 85% and constant between 60 and 160 mA/cm2.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
