GRK 2802: Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO-C Refractories
Type of the data | Dataset | |
Type of the data | Image | |
Total size of the dataset | 22215258 | |
Author | Pan, Luyao | |
Author | Wulf, Rhena | |
Author | Stadtmüller, Till M. J. | |
Author | Aneziris, Christos G. | |
Author | Fieback, Tobias M. | |
Upload date | 2026-02-12T13:49:36Z | |
Publication date | 2026-02-12T13:49:36Z | |
Publication date | 2026-02-12 | |
Abstract of the dataset | Reliable measurement of thermal diffusivity of MgO-C refractories is impeded by diverse sample preparation and processing procedures. In this study, the impacts of coking sequence, machining conditions, microstructural inhomogeneity, and graphite coating on the results obtained using the laser flash apparatus at room temperature are systematically evaluated. Specifically, machining samples after coking prevents surface oxidation compared with machining before coking. Mechanical damage is reduced by water-assisted machining, resulting in increased thermal diffusivity. However, when applied before coking, water-assisted machining leads to brucite formation, and thermal diffusivity is consequently decreased. Furthermore, uniaxial pressing induces microstructural inhomogeneity, with finer grains on the surface, thereby lowering thermal diffusivity. Uncoated samples overestimate thermal diffusivity compared with graphite-coated ones due to MgO translucency. To clarify these mechanisms, complementary analyses including phase, microstructural, and compositional characterization were performed to support these findings. The results demonstrate that the optimal preparation of MgO-C samples for measurements using the laser flash apparatus involves coking first, followed by water-assisted machining, and subsequent graphite coating. Such a preparation procedure enhances measurement reliability, providing practical guidance for standardized thermophysical property evaluation of MgO-C refractories. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2059 | |
Publisher | Technische Universität Bergakademie Freiberg | |
Specification of the discipline(s) | 4 | |
Title of the dataset | GRK 2802: Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO-C Refractories | |
Project abstract | Due to their initial use at high temperatures and contact with molten materials, refractory recyclates exhibit significant changes in their thermophysical properties, particularly thermal conductivity, compared to the original materials (impurities, changes in structure and phase composition, etc.). The aim is to predict the temperature-dependent thermal conductivity, as well as the associated variables like thermal diffusivity, heat capacity and thermal shock behaviour of recyclates and composite materials depending on their composition and history. The methods used involve the application and further development of various thermal conductivity measurement procedures for the fastest possible evaluation across a wide temperature range, coupled with the development of mathematical models for the quantitative evaluation of the most important influencing factors. | |
Funding Acknowledgement | The dataset was 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_P3_ Thermal conductivity of functionalised materials based on recycled materials |