Raman Spectroscopy Studies of Carbon-Based Cathode Materials during Aluminum Electrolysis

• Autorzy: Wang Wei , Chen Weijie

Identyfikatory

DOI

10.24425/amm.2019.130088

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

aluminium electrolysis; carbon cathodes; Raman spectroscopy; creep deformation; sodium expansion

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2019
• Tom: Vol. 64, iss. 4
• Strony: 1257--1261
• Opis fizyczny: Bibliogr. 29 poz., fot., rys., tab.

Twórcy

autor

Wang Wei

• College of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
• Collaborative Innovation Center of Nonferrous Metals Henan Province, Luoyang 471023, China

autor

Chen Weijie

• College of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
• Collaborative Innovation Center of Nonferrous Metals Henan Province, Luoyang 471023, China

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Uwagi

EN

1. Financial support from National Natural Science Foundation of China (NSFC) (No. U1704154) are gratefully acknowledged.

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).