Application of Raman and Photoluminescence Spectroscopy to MgO-C Refractories
References to related material | https://doi.org/10.1002/adem.202502619 | |
Type of the data | Dataset | |
Total size of the dataset | 721473 | |
Author | Richter, Julia | |
Author | Drechsler, Felix | |
Author | Stadtmüller, Till M. J. | |
Author | Himcinschi, Cameliu | |
Author | Aneziris, Christos G. | |
Author | Kortus, Jens | |
Upload date | 2026-10-06T07:22:49Z | |
Publication date | 2026-10-06T07:22:49Z | |
Publication date | 2026-10-06 | |
Abstract of the dataset | Magnesia-carbon (MgO-C) bricks partially made of recycled magnesia (MgO) are examined in hardened and coked state using Raman and photoluminescence (PL) spectroscopy, focusing on the MgO grains compared with nominally pure MgO powder for reference. Raman and PL signals in the visible to near infrared range are distinguished and interpreted by varying the excitation wavelength between 532, 633, and 785 nm. Besides a broad PL band centered at 565 nm characteristic of the brick-derived MgO, the origin of two sharp high-intensity PL signals (699, 871 nm) surrounded by symmetrical sidebands is clarified. The 699 nm luminescence reveals the presence of trivalent chromium (Cr3+) impurities in the MgO lattice of MgO-C bricks as well as MgO powder, while the latter, V2+-related PL signal is only observed for the brick-derived MgO. The nature of the symmetrical sidebands is investigated by temperature-dependent spectroscopic measurements between 100 and 295 K. The temperature dependence of the intensity ratio between higher energy (anti-Stokes) and lower energy (Stokes) sidebands confirms the phonon involvement in both the MgO:Cr3+ and MgO:V2+ signals. This study enhances the spectroscopic methods to apply to industrial refractory materials, while it reveals impurities on a defect level that is not accessible by any well-established analysis. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2979 | |
Publisher | Technische Universität Bergakademie Freiberg | |
Specification of the discipline(s) | 3::32::307::307-01 | |
Title of the dataset | Application of Raman and Photoluminescence Spectroscopy to MgO-C Refractories | |
Project abstract | Raman spectroscopy is used to investigate phases, functionalised surfaces and possible impurities of refractory recyclates for the production of novel refractory materials using environmentally friendly binders. Using in-situ Raman spectroscopy as a function of temperature, phase transitions can be detected and intermediate or by-products can be identified. The characterisation of carbon-bonded materials using Raman spectroscopy and, in particular, an understanding of the reactions during the coking of the environmentally friendly gelatine-based binders as a function of temperature is a key area of work. Raman spectroscopy is also applied to investigate inert, metalloceramic anode materials based on refractory recyclate and to monitor the microstructure design of composite materials by FAST/SPS. The aim is to understand temperature-induced structural and compositional changes (e.g. spinel formation of nickel ferrites) in the metalloceramic anode materials. | |
Funding Acknowledgement | The datasets were generated within the framework of the Research Training Group GRK 2802 (project ID: 461482547) funded by the German Research Foundation (DFG). | |
Public project website(s) | https://tu-freiberg.de/en/research/grk2802 | |
Project title | GRK2802_P9_Ramanspectroscopic-characterization-of-functionalised-recyclate-based-materials |