Study on the mechanism of deoxidization and purification for Li2BeF4 molten salt via graphite nanoparticles
Xie, MY; Li, L; Ding, YP; Zhang, GX
2017
发表期刊JOURNAL OF NUCLEAR MATERIALS
ISSN0022-3115
卷号487页码:317-322
文章类型期刊论文
摘要Graphite nanoparticles originated from high purity graphite crucible were used for deoxidization and purification of Li2BeF4 molten salt containing a bit of (NH4)(2)BeF4 under high temperature vacuum condition. And the mechanism of deoxidization and purification via graphite nanoparticles was put forward based on analysis of sample characterization and chemical reaction Gibbs free energy calculation. The morphology, particle size, chemical composition and crystal structure of graphite nanoparticles in Li2BeF4 molten salt were characterized by High Resolution Transmission Electron Microscopy (HRTEM, SAED and EDS). Phase analysis, total oxygen content, full elemental and anion concentration for as prepared Li2BeF4 products were studied by X-Ray Diffraction (XRD), LECO nitrogen-oxygen analyzer, Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) and Ion Chromatography (IC), respectively. The results of sample characterization showed that graphite nanoparticles in Li2BeF4 molten salt were the poly-crystal round sheet shape with an average diameter of <100 nm. The concentration of total oxygen, sulfur and nickel in as-prepared Li2BeF4 molten salt after treatment were 548 ppm, <0.6 ppm and <0.4 ppm, respectively. Experiment and calculation all showed that SO42- and NO3- could react with carbon at 700 degrees C. And vacuum degassing play an excellent role in deoxidization and purification for Li2BeF4 molten salt via graphite nanoparticles. (C) 2017 Elsevier B.V. All rights reserved.
关键词Mechanism Li2bef4 Molten Salt Deoxidization And Purification Graphite Nanoparticles Vacuum Degassing
DOI10.1016/j.jnucmat.2017.01.055
收录类别SCI
语种英语
WOS记录号WOS:000399506900037
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27457
专题中科院上海应用物理研究所2011-2018年
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GB/T 7714
Xie, MY,Li, L,Ding, YP,et al. Study on the mechanism of deoxidization and purification for Li2BeF4 molten salt via graphite nanoparticles[J]. JOURNAL OF NUCLEAR MATERIALS,2017,487:317-322.
APA Xie, MY,Li, L,Ding, YP,&Zhang, GX.(2017).Study on the mechanism of deoxidization and purification for Li2BeF4 molten salt via graphite nanoparticles.JOURNAL OF NUCLEAR MATERIALS,487,317-322.
MLA Xie, MY,et al."Study on the mechanism of deoxidization and purification for Li2BeF4 molten salt via graphite nanoparticles".JOURNAL OF NUCLEAR MATERIALS 487(2017):317-322.
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