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Superconducting properties of sintered bulk MgB.sub.2./sub. prepared from hexane-mediated high-energy-ultra-sonicated boron
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SYSNO ASEP 0541847 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Superconducting properties of sintered bulk MgB2 prepared from hexane-mediated high-energy-ultra-sonicated boron Author(s) Arvapalli, S.S. (JP)
Miryala, M. (JP)
Sunsanee, P. (JP)
Jirsa, Miloš (FZU-D) RID, ORCID
Murakami, M. (JP)Number of authors 5 Article number 115030 Source Title Materials Science and Engineering B-Advanced Functional Solid-State Materials. - : Elsevier - ISSN 0921-5107
Roč. 265, Mar (2021)Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords high-energy ultra-sonication ; hexane dispersant ; bulk MgB2 ; cheap commercial boron Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000615944000004 EID SCOPUS 85098848515 DOI 10.1016/j.mseb.2020.115030 Annotation Recently, novel low cost techniques have been employed to improve critical current density of MgB2. Ultra-sonication is one such technique. We report on the influence of hexane dispersant on particle size of ultra-sonicated cheap commercial boron and the superconducting properties of MgB2 bulks prepared using this new precursor. XRD showed major peaks corresponding to MgB2, with small fractions of MgO and unreacted Mg. Tc was close to 39 K, with a sharp transition. The highest Jc was found in the sample with boron ultra-sonicated for 30 min as high as 375, 328, and 270 kA/cm2 at 10, 15, and 20 K, respectively. SEM analysis revealed tiny particles and layers randomly dispersed in the microstructure, while EDX indicated that these particles were secondary phases of Mg, B, and O. Flux pinning diagrams showed the peak of normalized pinning force located close to b = 0.2, depicting dominance of grain boundary pinning mechanism. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address https://doi.org/10.1016/j.mseb.2020.115030
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