Number of the records: 1
Novel ultra-sonic boron refinement in distilled water for cost-efficient fabrication of MgB.sub.2./sub. bulk ceramic superconductors
- 1.
SYSNO ASEP 0561608 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Novel ultra-sonic boron refinement in distilled water for cost-efficient fabrication of MgB2 bulk ceramic superconductors Author(s) Arvapalli, S.S. (JP)
Miryala, M. (JP)
Sakai, N. (JP)
Murakami, M. (JP)
Jirsa, Miloš (FZU-D) RID, ORCIDNumber of authors 5 Source Title Ceramics International. - : Elsevier - ISSN 0272-8842
Roč. 48, č. 19 (2022), s. 28102-28111Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords bulk MgB2 ceramics ; boron ultra-sonication ; distilled water medium ; Jc enhancement Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000861032800002 EID SCOPUS 85132857278 DOI 10.1016/j.ceramint.2022.06.115 Annotation 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. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2023 Electronic address https://hdl.handle.net/11104/0334182
Number of the records: 1