将化学计量比为1∶2的Mg粉和B粉直接装管,采用原位粉末套管(PIT)技术制备了MgB2/Fe线材,在四个温度条件下(650℃,750℃,850℃,950℃)进行了热处理.采用四引线法测量了不同温度和磁场下线材的临界电流密度(Jc),分析了热处理温度对磁通钉扎的影响,采用扫描电镜(SEM)和透射电镜(TEM)研究了线材中MgB2超导相的微观结构.结果表明:热处理温度对MgB2/Fe线材的Jc和磁通钉扎特性有显著影响,最佳热处理温度应为750℃.
参考文献
[1] | Yoshii K;Hideki A .[J].Superconductor Science and Technology,2002(15):L25-L27. |
[2] | Kambara1 M;Babu1 N H;Sadki1 E S et al.[J].Superconductor Science and Technology,2001(14):L5-L7. |
[3] | Buzea C;Tsutomu Y .[J].Superconductor Science and Technology,2001(14):R115-R146. |
[4] | ZENG X H;Sukiasyan A;Xi X X et al.[J].Applied Physics Letters,2001(79):1840-1842. |
[5] | Rhyee J S;Kim C A;Cho B K et al.[J].Applied Physics Letters,2002(80):4407-4409. |
[6] | Grasso G et al.[J].Applied Physics Letters,2001(79):230. |
[7] | Jin S;Mavoori H;Bower C et al.[J].Nature,2001,411:563-565. |
[8] | Kovac P;Husek I;Melisek T .[J].Superconductor Science and Technology,2002(15):1340-1344. |
[9] | Suo H L;Beneduce C;Dhallé M et al.[J].Applied Physics Letters,2001(79):3116-3118. |
[10] | Si-hai Zhou et al.[J].Superconductor Science and Technology,2002(15):1490-1492. |
[11] | Pradhan A K;Feng Y;Zhao Y et al.[J].Applied Physics Letters,2001(79):1649-1651. |
[12] | Kumakura H;Matsumoto A;Fujii H et al.[J].Applied Physics Letters,2001(79):2435-2437. |
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