IMD-MgB_(2)超导线材的研究进展  

Research Progress of MgB_(2)Wires Prepared by IMD

作　　者：何龙军 杨芳[2] 王庆阳[2] 雷黎[1] 冯建情[2] 李成山[2] HE Longjun;YANG Fang;WANG Qingyang;LEI Li;FENG Jianqing;LI Chengshan(School of Material Science and Engineering,Xi’an University of Technology,Xi’an 710048,China;Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China)

机构地区：[1]西安理工大学材料科学与工程学院,西安710048 [2]西北有色金属研究院,西安710016

出　　处：《低温物理学报》2022年第2期108-115,共8页Low Temperature Physical Letters

基　　金：国家重点研发计划项目(2021YFB3800200)资助的课题.

摘　　要：中心镁扩散技术(IMD)自2003年被Giunchi等人首创以来,国内外学者系统地揭示了Mg与B反应机制,MgB_(2)烧结成相过程及掺杂物的影响;IMD-MgB_(2)线材具有致密的MgB_(2)层,J_(e)远高于同等条件下传统PIT法制备的线材.目前IMD-MgB_(2)百米级线材已被成功制备,为IMD-MgB_(2)超导线材的生产应用奠定了基础.本文首先简要介绍了IMD-MgB_(2)超导线材的发展历程,其次讨论了对线材超导性能影响的相关因素,包括B粉和C掺杂、有效的MgB_(2)层密度、晶粒尺寸、粉末填充系数、线材直径、热处理条件及线材的交流损耗,最后简述了IMD-MgB_(2)超导线材目前存在的技术难题及未来的工作重心.Since the internal magnesium diffusion(IMD)technology was initiated in 2003by Giunchi,the reaction mechanism between Mg and B,the phase formation process and mechanism of MgB_(2),and the influence of dopants have been systematically revealed by researchers;IMD-MgB_(2)wires have dense MgB_(2)layer,and J_(e) is higher than those prepared by traditional PIT method under the same conditions.Now IMD-MgB_(2)100m-class wire has been successfully prepared,which will lay the foundations on practical applications of MgB_(2)superconducting wires.In this article,firstly,the development history of IMD-MgB_(2)superconducting wires is briefly introduced.Furthermore,the influence mechanisms of relevant factors on superconducting properties are discussed,including B powder and C doping,effective MgB_(2)density,grain size,powder filling coefficient,wire diameter,heat treatment conditions and AC loss of wire.Finally,the existing technical problems and future work focusing on IMD-MgB_(2)superconducting wire are briefly described.

关 键 词：MgB_(2)超导体 IMD 超导线材 研究进展 

分 类 号：TM26[一般工业技术—材料科学与工程]