镁扩散法制备Pr_6O_(11)掺杂的MgB_2块体的临界电流密度和磁场性能（英文）  

Improved Critical Current Density and Magnetic Properties of Pr_6O_(11)-doped MgB_2 Bulks Synthesized by Mg-diffusion Method

作　　者：邵晖[1] 单迪[1] 潘熙锋[2] 闫果[2] 王庆阳[3] 熊晓梅[3] Shao Hui1, Shan Di1, Pan Xifeng2, Yan Guo2, Wang Qingyang3, Xiong Xiaomei3(1. Xi＇an University of Technology, Xi＇an 710048, China; 2 National Engineenng Laboratory for Superconducting Materials, Western Super- conducting Technologies Co., Ltd, Xi＇an 710018, China; 3 Northwest Institute for Nonferrous Metal Research, Xi＇an 710016, China)

机构地区：[1]西安理工大学,陕西西安710048 [2]西部超导材料科技股份有限公司超导材料制备国家工程实验室,陕西西安710018 [3]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2018年第10期2976-2979,共4页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51501150);Programs from Xi’an University of Technology(108-451016007)

摘　　要：采用镁扩散法制备了Pr_6O_(11)纳米颗粒掺杂的Mg B_2超导块体,研究了Pr_6O_(11)掺杂对其临界电流密度(J_c),不可逆磁场(H_(irr))和上临界磁场(H_(c2))的影响。实验结果表明,Pr_6O_(11)纳米颗粒掺杂明显提高了块体的J_c,H_(irr)和H_(c2),但没有降低其超导转变温度T_c。在20 K自场条件下,质量分数为1%Pr_6O_(11)掺杂Mg B_2块体的J_c为未掺杂样品的近5倍,J_c=3.61×10~5A/cm^2。在10 K温度下,Mg B_2块体H_(c2)和H_(irr)较未掺杂样品分别提高了1.9和2.6 T。同时讨论了Pr_6O_(11)纳米颗粒掺杂对MgB_2块体的超导性能和磁通钉扎机制的影响。The effects of the addition of Pr6O11 nanopowder on the critical current density（Jc）,irreversible field（Hirr）and upper critical field（Hc2）of the MgB2 bulks prepared by a Mg-diffusion method were investigated.The results show that the Pr6O11 nanopowder doping can significantly enhance the J_（c,）Hirr and Hc2 of the MgB2 bulks,but has little effect on the superconducting transition temperature（Tc）.At 20 K in a self-field,the Jc value of the 1 wt%Pr6O11-doped MgB2 sample is 3.61×10^5 A/cm^2,which is nearly 5 times larger than that of the undoped sample.In addition,at 10 K,the Hc2 and Hirr of the bulk increase by 1.9 and 2.6 T,respectively.The effect of Pr6O11-doping on superconductivity and flux pinning mechanism was also discussed.

关 键 词：MGB2 Pr6O11掺杂 临界电流密度 磁场性能 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ132.2[化学工程—无机化工]