Počet záznamů: 1

Novel ultra-sonic boron refinement in distilled water for cost-efficient fabrication of MgB.sub.2./sub. bulk ceramic superconductors

SYSNO ASEP	0561608
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Novel ultra-sonic boron refinement in distilled water for cost-efficient fabrication of MgB₂ bulk ceramic superconductors
Tvůrce(i)	Arvapalli, S.S. (JP) Miryala, M. (JP) Sakai, N. (JP) Murakami, M. (JP) Jirsa, Miloš (FZU-D)_{RID, ORCID}
Celkový počet autorů	5
Zdroj.dok.	Ceramics International. - : Elsevier - ISSN 0272-8842 Roč. 48, č. 19 (2022), s. 28102-28111
Poč.str.	10 s.
Jazyk dok.	eng - angličtina
Země vyd.	GB - Velká Británie
Klíč. slova	bulk MgB₂ ceramics ; boron ultra-sonication ; distilled water medium ; Jc enhancement
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	000861032800002
EID SCOPUS	85132857278
DOI	10.1016/j.ceramint.2022.06.115
Anotace	Cheap commercial boron was refined ultra-sonically in distilled water medium for various durations. X-ray diffraction pattern (XRD) indicated impurity-free nature of ultra-sonically refined boron. Field emission scanning electron microscope (FE-SEM) showed refinement of coarse boron to nanoscale. Rietveld phase fraction analysis on XRD pattern of sintered bulk prepared from ultra-sonically refined boron and Mg powder revealed a complete MgB2 phase formation, with a few impurities of MgO. FWHM (Full width at half maximum) is used to estimate crystallite size and microstrain. Tc,onset was around 38.5 K, with a sharp transition (ΔTc ∼ 0.5 K). Critical current density (Jc) of bulks prepared with B ultra-sonicated in distilled water for 15 and 30 min reached 295 and 305 kAcm−2 at 20 K/self-field, respectively. This is 35% increase in Jc showing the cost efficiency of this novel technique.
Pracoviště	Fyzikální ústav
Kontakt	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Rok sběru	2023
Elektronická adresa	https://hdl.handle.net/11104/0334182

Počet záznamů: 1