Improve titanate reduction by electro-deoxidation of Ca3Ti2O7 precursor in molten CaCl2

doi:10.1007/s12613-020-2165-2

	Improve titanate reduction by electro-deoxidation of Ca3Ti2O7 precursor in molten CaCl2
	Wang, Dong 1,2,3; Pang, Sheng 4; Zhou, Chun-yue 4; Peng, Yan 4; Wang, Zhi 1,3,4; Gong, Xu-zhong 1,3,4
刊名	INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
	2020-12-01
卷号	27 期号:12 页码:1618-1625
关键词	calcium titanate Ca3Ti2O7 molten calcium chloride solid-state reaction reaction speed
ISSN号	1674-4799
DOI	10.1007/s12613-020-2165-2
英文摘要	The low O2- diffusion rate in the electro-deoxidation of titanium containing compounds by either the OS process or the FFC process leads to a low reaction speed and a low current efficiency. In this study, Ca3Ti2O7 was used as a precursor to improve the reduction speed of titanium. Because of the greater number of "diffusion channels" created in cathode as Ca2+ liberates from Ca3Ti2O7 precursor in the electro-deoxidation process, the O2- diffusion rate was improved significantly by using Ca3Ti2O7 instead of CaTiO3 as precursor. Parallel constant voltage electrolysis (3.2 V) confirms that Ca3Ti2O7 and CaTiO3 are reduced simultaneously because of their similar crystal structures. However, the reduction area of Ca3Ti2O7 spreads much faster than that of CaTiO3, indicating a difference in the O2- diffusion rate. Constant voltage cyclic voltammetry (CV) and theoretical analysis of the crystal structure were also conducted to compare the differences between Ca3Ti2O7 and CaTiO3. The results indicate that using a precursor with a greater number of soluble cations, titanium reduction speed can be greatly improved in the electro-deoxidation process. Finally, a new electrolysis method for converting and recycling excess CaO from the Ca3Ti2O7 precursor was proposed.
WOS关键词	ELECTROCHEMICAL REDUCTION ; TITANIUM-DIOXIDE ; METAL ; TIO2 ; CA4TI3O10 ; CATIO3 ; MELT
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering ; Mining & Mineral Processing
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000603567900005
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/43048]
专题	中国科学院过程工程研究所
通讯作者	Wang, Zhi
作者单位	1.Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341119, Peoples R China 3.Chinese Acad Sci, Innovat Acad Green Mfg, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Dong,Pang, Sheng,Zhou, Chun-yue,et al. Improve titanate reduction by electro-deoxidation of Ca3Ti2O7 precursor in molten CaCl2[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2020,27(12):1618-1625.
APA	Wang, Dong,Pang, Sheng,Zhou, Chun-yue,Peng, Yan,Wang, Zhi,&Gong, Xu-zhong.(2020).Improve titanate reduction by electro-deoxidation of Ca3Ti2O7 precursor in molten CaCl2.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,27(12),1618-1625.
MLA	Wang, Dong,et al."Improve titanate reduction by electro-deoxidation of Ca3Ti2O7 precursor in molten CaCl2".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 27.12(2020):1618-1625.