RAMAN SPECTROSCOPY STUDIES OF CARBON-BASED CATHODE MATERIALS DURING ALUMINUM ELECTROLYSIS

被引：3
作者：
Wang, Wei [1 ,2 ]
Chen, Weijie [1 ,2 ]
机构：
[1] Henan Univ Sci & Technol, Coll Mat Sci & Engn, Luoyang 471023, Peoples R China
[2] Collaborat Innovat Ctr Nonferrous Met Henan Prov, Luoyang 471023, Peoples R China
来源：
ARCHIVES OF METALLURGY AND MATERIALS | 2019年 / 64卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Aluminum electrolysis; Carbon cathode; Raman spectroscopy; Creep deformation; Sodium expansion; RAPOPORT-SAMOILENKO TEST; GRAPHITE; GRAPHENE; MICROSCOPY; BEHAVIOR; SPECTRA; STRAIN; ANODES; BANDS;
D O I：
10.24425/amm.2019.130088
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The sodium expansion and creep strain of semi-graphitic cathodes are investigated using a modified Rapoport apparatus. To further understanding of the sodium and bath penetration damage processes, the impact of external stress fluence on the carbon cathode microstructure has been defined with XRD analysis, Raman spectroscopy and scanning electron microscope (SEM). Graphite atoms fracture into smaller fragments that are less directional than the pristine platelets, which allows for a possible filling of the cracks that thus develop by the sodium and bath during aluminum electrolysis. The average microcrystalline size (calculated by Raman spectroscopy) is reduced by the deformation. The decreased intensity and widened 'G' and 'D' peaks in the analysis indicate the poor order of the sheets along the stacking direction while the consistent layered graphite structure is sustained.
引用
收藏
页码：1257 / 1261
页数：5
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