0570386 - FZÚ 2024 RIV US eng J - Článek v odborném periodiku
Muralidhar, M. - Srikanth, A.S. - Pinmangkorn, S. - Santosh, M. - Jirsa, Miloš
Role of superconducting materials in the endeavor to stop climate change and reach sustainable development.
Journal of Superconductivity and Novel Magnetism. Roč. 36, č. 3 (2023), s. 803-812. ISSN 1557-1939. E-ISSN 1557-1947
Grant ostatní: AV ČR(CZ) StrategieAV21/3
Program: StrategieAV
Institucionální podpora: RVO:68378271
Klíčová slova: global warming * superconducting technology * GdYEr-123 * MgB₂ * critical current density
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.7, rok: 2023 ; AIS: 0.27, rok: 2023
Způsob publikování: Open access
DOI: https://doi.org/10.1007/s10948-023-06515-6

Progress in the mass production of newly developed bulk (Gd0.33Y0.13Er0.53)Ba2Cu3Oy “(Gd,Y,Er)123” and MgB2 systems is presented. Two batches of (Gd,Y,Er)123 pellets of 20 mm diameter and 7 mm thick were prepared in air by an infiltration growth “IG” process. Trapped field distribution profiles of fully grown bulk samples clearly showed that all samples were single-grain and the trapped field values were more than 0.5 T at 77 K, 1.3 mm above top surface. The best bulk exhibited the trapped field value of 0.63 T at 77 K. Ultra-sonication technique was employed for refining precursors of both (Gd,Y,Er)211 and boron. TEM studies revealed that boron powder subjected to ultrasonication was refined up to nanoscale. The micron-sized particles were reduced to nanoscale, which led to improvement of critical current by up to 36% in bulk MgB2 at 20 K and self-field.
Trvalý link: https://hdl.handle.net/11104/0342711