Počet záznamů: 1
Tuning of grain boundaries in MgB.sub.2./sub. by boron ultra-sonication in 2-propanol - A way to low-cost high-J.sub.c./sub. bulk superconducting magnets
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SYSNO ASEP 0572410 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Tuning of grain boundaries in MgB2 by boron ultra-sonication in 2-propanol - A way to low-cost high-Jc bulk superconducting magnets Tvůrce(i) Srikanth, A.S. (JP)
Santosh, M. (JP)
Jirsa, Miloš (FZU-D) RID, ORCID
Muralidhar, M. (JP)Celkový počet autorů 4 Číslo článku 170146 Zdroj.dok. Journal of Alloys and Compounds. - : Elsevier - ISSN 0925-8388
Roč. 955, Sep (2023)Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova boron ultra-sonication ; high-Jc ; bulk MgB2 magnets ; grain boundaries ; 2-Propanol Vědní obor RIV BM - Fyzika pevných látek a magnetismus Obor OECD Condensed matter physics (including formerly solid state physics, supercond.) Způsob publikování Open access Institucionální podpora FZU-D - RVO:68378271 UT WOS 000990828300001 EID SCOPUS 85153850146 DOI 10.1016/j.jallcom.2023.170146 Anotace Viscosity of solvent has been found to influence particle refinement during high-energy ultra-sonic treat-ment. 2-propanol, a solvent with viscosity ∼ 2.07 cP, was used to ultra-sonically refine boron powder. Unlike ball-milling, boron powder refined this way seem to be oxide free in nature as observed via X-ray diffraction (XRD). Field-emission scanning electron microscope (FE-SEM) showed a boron powder refinement up to nanoscale as well as morphological changes to the particles. FE-SEM of the bulk MgB2 fabricated from the ultra-sonically refined boron exhibited a principal MgB2 phase with scarce impurities of MgO. Lattice parameters ‘a’ and ‘c’ calculated from XRD patterns remained constant around 3.086 and 3.523 Å respectively, ruling out any carbon intrusion from solvent into bulks. Simultaneously all the bulks had Tc,onset around 38.5 K, with a sharp transition (ΔTc ∼ 0.5 K). Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2024 Elektronická adresa https://hdl.handle.net/11104/0343247
Počet záznamů: 1