GRK 2802: Raman Spectroscopic Identi cation of Oxide Phases in a Cor- roded MgO-Steel Composite Anode Used in Aluminum Molten Salt Electrolysis
Type of the data | Dataset | |
Type of the data | Text | |
Total size of the dataset | 62312500 | |
Author | Drechsler, Felix | |
Author | Yaroshevskyi, Serhii | |
Author | Adamczyk, Alexander | |
Author | Mehdizadehlima, Mahnaz | |
Author | Richter, Julia | |
Author | Himcinschi, Cameliu | |
Author | Rafaja, David | |
Author | Charitos, Alexandros | |
Author | Aneziris, Christos G. | |
Author | Kortus, Jens | |
Upload date | 2026-03-04T16:48:23Z | |
Publication date | 2026-03-04T16:48:23Z | |
Publication date | 2026-03-04 | |
Abstract of the dataset | This study presents the post-mortem phase characterization of a metal ceramic composite anode composed of 316L stainless steel and recycled MgO, sourced from spent refractory lining bricks, employed in aluminium molten salt electrolysis. The analysis focused on the immersed section of the anode, where direct exposure to the molten Na-cryolite melt promotes the formation of corrosion products. Raman spectroscopy was applied as a structural characterization technique, providing phase information that complements the morphological and elemental analyses obtained from SEM EDX measurements. Due to its high spatial resolution, micro-Raman spectroscopy enabled the identi cation of local phases within the corrosion layer and the determination of their depth-dependent distribution. The local chemical analysis revealed an outer Fe O-rich layer penetrating several tens of micrometers into the material, followed by a Fe Al O-containing zone. Raman spectroscopy identi ed the Fe O layer as magnetite (Fe3O4) and the inner layer as hercynite (FeAl2O4), with a transition region consisting of Al-doped Fe3O4. The results demonstrate the applicability of Raman spectroscopy for identifying corrosion products to provide contributions to the corrosion mechanisms of MgO-steel anodes under electrolytic conditions. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2104 | |
Publisher | Technische Universität Bergakademie Freiberg | |
Specification of the discipline(s) | 4::43::406 | |
Title of the dataset | GRK 2802: Raman Spectroscopic Identi cation of Oxide Phases in a Cor- roded MgO-Steel Composite Anode Used in Aluminum Molten Salt Electrolysis | |
Project abstract | The aim of this doctoral research project is the comprehensive electrical characterization of inert, metal-ceramic anode materials for aluminum electrolysis in molten salt systems. A particular focus is placed on the temperature-dependent investigation of electrical conductivity. At the beginning of the project, a measurement setup for determining the specific electrical resistivity in the temperature range of 50 to 600 °C is available. This system, supervised by the Institute for Experimental Physics, will serve as a reference. In addition, temperature-dependent Raman spectroscopy will be used to analyze the phase composition of the composite electrodes and to identify newly formed phases that may result either from the fabrication process or from thermal and environmental influences encountered during operation in the electrolysis cell. Furthermore, electrical conductivity measurements will be performed within selected individual phases, with the goal of establishing a correlation between the structural and electrical properties of the materials. | |
Funding Acknowledgement | The authors thank the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation; project number: 461482547 (GRK 2802)) for the financial support. The Raman spectrometer S&I MonoVista CRS3 was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - project number: 552981260. | |
Public project website(s) | https://tu-freiberg.de/en/research/grk2802 | |
Project title | GRK2802_P9II_Raman spectroscopic and electrical characterization of functionalized and recycle-based materials |