Biomass-derived carbon doping to enhance the current carrying capacity and flux pinning of an isotopic Mg^(11)B_(2)superconductor

查看全文 作　　者：[1]M.Shahbazi;[2]Y.Hao;[2]D.Patel;[2]H.Liang;[3,4]Y.Yamauchi;[2]M.S.A.Hossain

机构地区：[1]QUT Centre for Materials Science and School of Chemistry and Physics,Queensland University of Technology(QUT),Brisbane,QLD 4001,Australia;[2]School of Mechanical and Mining Engineering,Faculty of Engineering,Architecture and Information Technology(EAIT),The University of Queensland,Brisbane,QLD 4072,Australia;[3]Australian Institute for Bioengineering and Nanotechnology(AIBN),The University of Queensland,Brisbane,QLD 4072,Australia;[4]JST-ERATO Yamauchi Materials Space-Tectonics Project and International Center for Materials Nanoarchitectonics(WPI-MANA),National Institute for Materials Science(NIMS),1-1 Namiki,Tsukuba,Ibaraki 305-0044,Japan

出　　处：《Journal of Magnesium and Alloys》索引2022年第10卷第7期,共10页

基　　金：the Queensland Government for Advance Queensland Research Fellowship in partnership with Siemens Energy(Aust)Pty Ltd and QUT which partially supported this work;by the Australian Research Council,Australia(Grant No.LP160101784)。 摘　　要：Low activation isotopic boron(11B)based magnesium diboride(Mg^(11)B_(2))superconductors doped with biomass-derived activated carbon were synthesized using11B and magnesium powder via solid-state reaction.The effect of carbon doping on the lattice structure and superconducting properties of Mg^(11)B_(2)bulks were evaluated using X-ray powder diffraction,high resolution transmission electron microscopy,scanning electron microscopy and magnetization measurements.Precise refinement of structural parameters indicates successful substitution of carbon in Mg^(11)B_(2)bulks.The critical current density(Jc)of carbon doped Mg^(11)B_(2)synthesized at 650℃was enhanced more than two times compared with the pure Mg^(11)B_(2)bulk.Similar improvement was observed for the Mg^(11)B_(2)bulks heat-treated at 800℃.This enhancement is due to successful substitution of biomass-derived carbon with high surface area into Mg^(11)B_(2)lattice.The flux pinning mechanism of pure and doped Mg^(11)B_(2)bulks were investigated using the Dew-Hughes model.This study provides information regarding enhancement of the Jc of low activation Mg^(11)B_(2)superconductors suitable for next-generation fusion magnets. 关键词：Magnesium diboride Critical current Flux pinning mechanism Fusion reactor applications

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Biomass-derived carbon doping to enhance the current carrying capacity and flux pinning of an isotopic Mg^(11)B_(2)superconductor

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