本文介绍了一种新的制备MgB2膜的方法--溶胶凝胶法.以Mg(BH4)2的乙醚溶液(Mg(BH4)2·Et2O)作为前驱体,将其覆涂于Al2O3(001)衬底上,并在Ma气氛保护下高温退火,得到了MaB2的多晶膜.与其它制备MgB2膜的方法相比,这种方法制备的膜具有较高品质,超导转变温度达到37K,临界电流密度Jc(5 K,0 T)~5×106A/cm2,上临界场Hc2(0)~19T.对于MgB2厚膜及线带材的制备,溶胶凝胶法被证明是一种极具潜力的方法.
参考文献
[1] | M. Paranthaman;C. Cantoni;H. Y. Zhai;H. M. Christen;T. Aytug;S. Sathyamurthy;E. D. Specht;J. R. Thompson;D. H. Lowndes;H. R. Kerchner;D. K. Christen .Superconducting MgB_(2) films via precursor postprocessing approach[J].Applied physics letters,2001(23):3669-3671. |
[2] | S. D. Bu;D. M. Kim;J. H. Choi;J. Giencke;E. E. Hellstrom;D. C. Larbalestier;S. Patnaik;L. Cooley;C. B. Eom;J. Lettieri;D. G. Schlom;W. Tian;X. Q. Pan .Synthesis and properties of c-axis oriented epitaxial MgB_(2) thin films[J].Applied physics letters,2002(10):1851-1853. |
[3] | L. Dimesso;O. B. Hyun;I. Hirabayashi .Preparation of LaBa_2Cu_3O_y thick films in the La-Ba-Cu-O system by partial melting techniques[J].Journal of Materials Research,1995(12):3016-3025. |
[4] | B H Moeckly;W S Ruby .Growth of high-quality large-area MgB_2 thin films by reactive evaporation[J].Superconductor Science & Technology,2006(6):L21-L24. |
[5] | Manashi Nath;B. A. Parkinson .A Simple Sol-Gel Synthesis of Superconducting MgB_2 Nanowires[J].Advanced Materials,2006(14):1865-1868. |
[6] | Y S Hascicek;Y Akin;T W Baldwin;M M Rindfleisch;J Yue;M D Sumption;M Tomsic .A MgB_2 12.5 kVA superconductor transformer[J].Superconductor Science & Technology,2009(6):065002-7. |
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