Number of the records: 1
Microstructure and critical current density in MgB.sub.2./sub. bulk made of 4.5 wt% carbon-coated boron
- 1.
SYSNO ASEP 0477618 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Microstructure and critical current density in MgB2 bulk made of 4.5 wt% carbon-coated boron Author(s) Higuchi, M. (JP)
Muralidhar, M. (JP)
Jirsa, Miloš (FZU-D) RID, ORCID
Murakami, M. (JP)Number of authors 4 Article number 012059 Source Title Journal of Physics: Conference Series, 871. - Bristol : IOP Publishing, 2017 - ISSN 1742-6588 Pages s. 1-5 Number of pages 6 s. Publication form Print - P Action International Symposium on Superconductivity /29./, ISS 2016 Event date 13.12.2016 - 15.12.2016 VEvent location Tokyo Country JP - Japan Event type WRD Language eng - English Country GB - United Kingdom Keywords MgB2 ; bulk superconductors ; microstructure ; critical currents ; carbon coated boron Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Institutional support FZU-D - RVO:68378271 EID SCOPUS 85027998380 DOI 10.1088/1742-6596/871/1/012059 Annotation Superconducting performance and its uniformity was studied in the single-step sintered MgB2 bulk prepared with 4.5 wt% of carbon in the carbon-encapsulated boron. The 20 mm in diameter MgB2 pellet was cut into several pieces from bottom to top and the microstructure, superconducting transition temperature (Tc onset), and critical current density at 20 K were studied. DC magnetization measurements showed a sharp superconducting transition with onset Tc at around 35.5 K in all positions. SEM analysis indicated a dispersion of grains between 200 and 300 nm in size, as the main pinning medium in this MgB2 superconductors. The critical current density at 20 K was quite uniform, around 330 kA/cm2 and 200 kA/cm2 at self-field and 1 T, respectively, for all measured positions. The results indicate that the carbonencapsulated boron is very promising for production of high quality bulk MgB2 material for various industrial applications. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2018
Number of the records: 1