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| RBS – Výskum masívnych supravodičov | |
| Research on bulk superconductors | |
| Program: | Other |
| Project leader: | Ing. Diko Pavel, DrSc., akademik US Slovenska |
| Annotation: | The agreement on cooperation between IEP SAS and CAN Superconductorsis focused on research od REBCO bulk supercondyctors for practical applications. |
| Project webpage: | https://websrv.saske.sk/uef/oddelenia-a-laboratoria/laboratorium-materialovej-fyziky/ |
| Duration: | 1.5.2018 – 31.12.2026 |
| MMP REBCO – RE211 nanorozmerové piningové centrá v REBCO masívnych supravodičoch vytvorené MPP procesom | |
| RE211 nanosize pining centers in REBCO bulks formed by modified precursor powder process | |
| Program: | Bilateral – other |
| Project leader: | Ing. Diko Pavel, DrSc., akademik US Slovenska |
| Annotation: | REBa2Cu3O7 (in short REBCO or RE123, RE = Y or rare earth) bulk singlegrain superconductors (BSS) are a new unique class of superconductors with a perspective of being superconducting permanent magnets. One way to get closer to their practical applications is to reduce the price or to increase their properties by applying more efficient progressivetechnological procedures for their fabrication. The refinement of pining centers in the form of non-superconducting particles of the RE2BaCuO5 (RE211) phase is an important task in the production of REBCO BSS by top-seeded melt-growth (TSMG) process in the form of highparameter cryomagnets. The Laboratory of Materials Physics (LMF) at IEP SAS and the Department of Physics of JTU Shanghai have long been involved in the REBCO BSS research and have achieved a significant international position in this area. The latest results of collaborative groups show that replacing the conventional Y211 powder addition into the nominal composition by the mixture of Y2O3 and Ba2Cu3x powders can create nanoscale Y211 pining centers which will lead to a significant increase in the value of the maximum trappped magnetic field. Within the joint project, we want to extend this efficient process to SmBCO and GdBCO type BSS, which generally show higher values of the trapped magnetic field than YBCO BSS. In fulfilling this goal, we will seek optimal chemical composition and growth conditions of bulk crystals. Growth of BSS will take place mainly at the Departments of Physics, Shanghai Jiao Tong University during the stay of young scientists from LMF. The microstructural analysis and characterization of superconducting properties will be performed mainly at LMF. The planned mutual cooperation will significantly contribute to a faster progression of REBCO MMS research, in particular by complementing collaborative knowledge, joint use of unique experimental methodologies at individual labs as well as the scientific advancement of young scientists |
| Duration: | 1.1.2018 – 31.12.2019 |
National
| REBCOAPL – REBCO masívne supravodiče na báze Y, Gd, Sm a Eu pre praktické aplikácie | |
| – | |
| Program: | SRDA |
| Project leader: | Ing. Diko Pavel, DrSc., akademik US Slovenska |
| Annotation: | The project is focused on research and development of selected REBCO bulk singlegrain superconductors (BSS).We will examine YBCO, GdBCO, SmBCO and EUBCO systems, which are currently preferred in terms ofmastering their production technology and specific applications. Based on our latest results, we will focus on thealloying of LREBCO (LRE- light rare earths) with elements that suppress Ba/LRE substitution in the crystal lattice,the addition of nanocrystalline BaCeO3, the bimodal size distribution of pining centres and the configuration ofholes in REBCO BSS. We will apply the research results in the development of BSS production technology withoptimized superconducting and mechanical properties. The use of the research and development results achievedwithin the project is expected by the manufacturer BSS CAN Superconductors s.r.o. |
| Project webpage: | https://websrv.saske.sk/uef/oddelenia-a-laboratoria/laboratorium-materialovej-fyziky/ |
| Duration: | 1.7.2022 – 30.6.2026 |
| BULKREBCO – Štruktúra, supravodivé a mechanické vlastnosti masívnych REBCO supravodičov | |
| Structure, superconducting and mechanical properties ov bulk REBCO superconductors | |
| Program: | VEGA |
| Project leader: | Ing. Diko Pavel, DrSc., akademik US Slovenska |
| Annotation: | The project is focused on the research of the influence of the structure on the superconducting and mechanical properties of the REBCO bulksingle grain superconductors (BSS). The effect of the bimodal particle size distribution of RE211 particles in the REBCO single crystal will be studied, as well as the effect of alloying. Acquiredthe knowledge will serve to optimize the preparation parameters and structure of REBCO BSS so that they are achievedthe combination of a high value of the trapped magnetic field and levitation force with increased mechanicalstrength. We will use experimental methods of powder metallurgy, bulk single crystal growth, X-ray diffraction, light and electron microstructure analysis, magnetization measurements, measurementsof trapped magnetic field and strength measurement. The project will be solved in cooperation withleading foreign laboratories within the formal (SIT Tokyo, JTU Shanghai, CAN Superconductors) andinformal (University of Cambridge, CRISTMAT Caen, FzÚ Praha, ) cooperation. |
| Project webpage: | https://websrv.saske.sk/uef/oddelenia-a-laboratoria/laboratorium-materialovej-fyziky/ |
| Duration: | 1.1.2022 – 31.12.2024 |
| BMREBCO – Vývoj REBCO supravodičov pre biomedicínske aplikácie | |
| Development of REBCO superconductors for biomedical applications | |
| Program: | SRDA |
| Project leader: | Ing. Diko Pavel, DrSc., akademik US Slovenska |
| Annotation: | The project focuses on the development of REBCO bulk singlegrain superconductors (BSS) for biomedical applications. Their use is envisaged by the small enterprise CRYOSOFT s.r.o. Košice for design of equipments for the magnetic separation of cells and for the magnetic transport of drugs. For these applications, REBCO BSS will be developed for use at temperatures that can be achieved by cryocooling (30-50K). We will study YBCO, SmBCO and GdBCO systems that can meet the requirements for the expected applications. The raw material price for YBCO BSS is lower than for SmBCO and GdBCO BSS, however, the SmBCO and GdBCO are reaching higher values of trapped magnetic field. Within the project solution, the optimized composition and the preparation technology of REBCO BSS will be found in order to achieve efficient pining in high magnetic fields below temperature of liquid nitrogen, which is a prerequisite for achieving high critical current density and high trapped magnetic field. The critical current density will be improved through chemical pining, refining RE211 particles, adding nanofibers. We will take advantage of our previous results in basic and applied research of REBCO BSS, some of which are patent-protected. |
| Project webpage: | https://websrv.saske.sk/uef/oddelenia-a-laboratoria/laboratorium-materialovej-fyziky/ |
| Duration: | 1.8.2018 – 30.6.2022 |
| ARES – Legované REBCO masívne supravodiče | |
| Alloyed REBCO bulk superconductors | |
| Program: | VEGA |
| Project leader: | Ing. Diko Pavel, DrSc., akademik US Slovenska |
| Annotation: | The project is focuses on the research of the influence of alloying (doping) on the structure and superconducting properties of REBCO bulk single-grain superconductors. The effect of alloying on the phase equilibrium, the growth of bulk crystals, the formation of pining centers, magnetic flux picking mechanisms, local and macroscopic superconducting properties in the temperature range achievable by cryocoolers will be investigated. Experimental methods of powder metallurgy, growth of bulk single-crystals, X-ray diffraction, microscopic optical and electron microstructure analysis and electron microanalysis, magnetization measurements and measurement of trapped magnetic field will be used. The project will be developed in cooperation with the leading foreign laboratories within the framework of formal (SIT Tokyo, JTU Shanghai, CAN Superconductors Prague) and the informal(University of Cambridge, KAERI Daegeon, CRISTMAT Caen, FZÚ Prague) cooperation. |
| Duration: | 1.1.2019 – 31.12.2021 |