Facile Electrochemical Preparation of Al-Sm Alloys in Molten Calcium Chloride

被引：2
|
作者：
Li, Junfeng [1 ]
Wang, Mingyong [1 ]
Tu, Jiguo [1 ]
Jiao, Shuqiang [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2018年 / 165卷 / 11期
关键词：
DIRECT ELECTROLYTIC PREPARATION; CATHODIC BEHAVIOR; TITANIUM-DIOXIDE; CACL2-NACL MELT; CHROMIUM POWDER; CO-REDUCTION; LICL-KCL; SAMARIUM; ELECTRODES; EXTRACTION;
D O I：
10.1149/2.0161813jes
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The direct preparation of metallic Sm or alloys from raw oxide Sm2O3 is an attracting but challenging process. The stable electrochemical behavior and low solubility of Sm2O3 limit the extraction of Sm element in molten salts. Here, it is found that metallic Sm is hardly obtained by electro-deoxidation and aluminothermic reduction of solid Sm2O3 pellet according to experiment and calculation. Through the novel electrochemical reduction of solid Sm2O3-Al pellet, Al3Sm alloy with similar to 0.4 Sm/Al molar ratio is successfully prepared in calcium chloride melt at 1173 K. The reduction potential of Sm2O3-Al pellet to Al-Sm alloy is more positive than that of calcium. Al plays an indispensable role in the reduction of Sm2O3. The preparation process of alloy can be well identified as two steps: Sm(III) -> Sm(II) and Sm(II) -> Sm(0). Sm2O3 is firstly converted to Sm(II) based on the combination of electrochemical and aluminothermic reduction. Then, Al3Sm is formed by electrochemical reduction and alloying with Al. (C) 2018 The Electrochemical Society.
引用
收藏
页码：E616 / E621
页数：6
相关论文
共 50 条
  • [21] Observation of η-Al41Sm5 reveals motif-aware structural evolution in Al-Sm alloys
    Z. Ye
    F. Meng
    F. Zhang
    Y. Sun
    L. Yang
    S. H. Zhou
    R. E. Napolitano
    M. I. Mendelev
    R. T. Ott
    M. J. Kramer
    C. Z. Wang
    K. M. Ho
    Scientific Reports, 9
  • [22] Mechanism of Direct Electrochemical Reduction of Tb-Dy-Fe Alloys in Molten Calcium Chloride
    Xie Hongwei
    Wang Jinxia
    Pyonghun, Kim
    Zhai Yuchun
    RARE METAL MATERIALS AND ENGINEERING, 2012, 41 (12) : 2233 - 2237
  • [23] Electrochemical Investigation of Moisture Byproducts in Molten Calcium Chloride
    Shum, Rankin
    Cragun, Marah
    Williams, Tyler
    Rappleye, Devin
    JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2024, 171 (09)
  • [24] Electrochemical Deoxidation of Titanium Foam in Molten Calcium Chloride
    Prabhat K. Tripathy
    Maxime Gauthier
    Derek J. Fray
    Metallurgical and Materials Transactions B, 2007, 38 : 893 - 900
  • [25] Electrochemical deoxidation of titanium foam in molten calcium chloride
    Tripathy, Prabhat K.
    Gauthier, Maxime
    Fray, Derek J.
    METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2007, 38 (06): : 893 - 900
  • [26] Non-equilibrium solute partitioning and microstructure formation in rapidly solidified Al-Sm alloys
    Meco, H.
    Napolitano, R. E.
    THERMEC 2006, PTS 1-5, 2007, 539-543 : 2810 - +
  • [27] PREPARATION OF METALLIC CALCIUM BY ELECTROLYSIS OF CALCIUM OXIDE DISSOLVED IN MOLTEN CALCIUM CHLORIDE
    THREADGILL, WD
    JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1964, 111 (12) : 1408 - 1411
  • [28] Glass formation in Al-rich Al-Sm alloys during solid state processing at ambient temperature
    Wilde, G
    Sieber, H
    Perepezko, JH
    JOURNAL OF NON-CRYSTALLINE SOLIDS, 1999, 250 : 621 - 625
  • [29] Preparation of titanium through the electrochemical reducing Ti4O7 in molten calcium chloride
    Yang, Fan
    Liu, Ying
    Ye, Jinwen
    Wang, Guangrui
    He, Wang
    MATERIALS LETTERS, 2018, 233 : 28 - 30
  • [30] Electrochemical deoxidation of ZrSiO4 in molten calcium chloride
    Min-Jae Lee
    Jae-Soo Noh
    Ki-Young Kim
    Jong-Hyun Lee
    The Physics of Metals and Metallography, 2014, 115 : 1356 - 1361
12345