Žiadúce a nežiadúce interakcie roztavených fluoridov s materiálmi na báze kritických prvkov
Desirable and undesirable interactions between molten fluorides and materials of critical elements
Program: VEGA
Project leader: Ing. Kubíková Blanka, PhD.
Annotation: The submitted project is focused on the study of desirable and undesirable interactions of molten fluoride systemswith materials based on the selected critical elements, the recycling rate of which is minimal in the EU. In thiscase, controlled physico-chemical processes are considered desirable interactions, in contrast to undesirableinteractions, primarily in connection with the corrosion of construction materials. The research will be focused onthe physicochemical and thermochemical analysis of molten fluorides, the study of solubility/corrosion resistanceof materials in molten salts, the synthesis of new substances, and spectral and diffraction analysis of puresubstances, molten mixtures, and solidified mixtures after experiments.
Duration: 1.1.2024 – 31.12.2027
Fluoridové taveninové systémy pre zelenú výrobu hliníka bez produkcie CO2
Molten fluoride systems for green production of aluminium without CO2 emissions
Program: VEGA
Project leader: Ing. Šimko František, PhD.
Annotation: The proposed project is related to complex phase and physico-chemical analysis of multicomponent nMF-AlF3 systems (M = Na, K, n=3-1.2) with the addition of metal oxides Al, Fe, and Ni where compounds based on Fe and Ni are represented corrosion products from the use of inert anodes in aluminium CO2 less production. These are the so-called low-temperature electrolytes, whose research has recently increased attention related to the development and application of inert anodes. The aim of the project will be to define the solubility of oxides/spinels, the phase composition of the systems and to identify the individual components, arising from the interaction between the corrosion products and the electrolyte. These systems will be studied to determine the relationship between the structure and their physicochemical behavior by using either of spectral methods in-situ in the molten state, or by ex-post analysis of the solidified samples, and by physicochemical analysis of high temperature molten systems.
Duration: 1.1.2022 – 31.12.2025
RARE – Interakcia fluoridových taveninových systémov prvkov vzácnych zemín s oxidmi kritických prvkov v kontexte špeciálnych aplikácií
Interaction of fluoride melts of rare earth elements with oxides of critical elements in the context of special applications
Program: SRDA
Project leader: doc. Ing. Boča Miroslav, DrSc.
Annotation: The aim of the research activities of this project is to study the interaction of molten fluorides of selected elements from the group of critical raw materials (defined by the European Raw Materials Initiative) with their oxides, while the systems are consisting of: . "solvents" which may be considered to be some binary fluoride MF or NF2 (M = Li, Na or K; N = Mg or Ca) or selected eutectic mixtures thereof (e.g. (LiF-NaF-KF)eut = FLiNaK, (LiF-CaF2)eut or (NaF-MgF2)eut), . Ln2O3 metal oxides (Ln = La, Ce, Sm, Eu, Nd, Gd), or transition metal oxides used in superalloys (e.g. Cr2O3, Fe2O3, NiO, ZrO2, Nb2O5, Ta2O5), . and the corresponding metal fluorides of the point above (LnF3, MetFx; x = 2-5). Such systems are currently in use or are being developed for their use in key industries such as metal production, energy applications or corrosion protection. The scientific activities of these systems deals with physico-chemical and thermo-chemical analysis of the systems in molten state (in situ), spectral and diffraction analysis of formed phases. The selection of used methods follows the above aims: thermal analysis, density, viscosity, surface tension, wetting and electrical conductivity measurements for the description of physico-chemical properties; simultaneous thermal analysis (TA/DTA/DSC) for the description of thermo-chemical properties and for the description of spectral and diffraction properties the following methods will be used: XRD, XSC, XRF, XPS, IR, NMR. The integral part of the project is the study of corrosion resistance of different construction under interaction with studied melts.
Duration: 1.7.2020 – 30.6.2024