采用Nd-Ba-Cu-Mg-O冷籽晶和熔融织构生长工艺,在空气气氛下制备出GdBaCuO单畴块材,并通过流通氧气气氛退火处理获得超导样品.研究了前驱粉末中不同BaCuO2-δ含量对GdBaCuO前驱粉末熔化温度、块材生长及超导磁浮力性能的影响.结果表明,GdBaCuO前驱粉末的熔点随着BaCuO2-δ添加量的增加而降低.前驱粉末中BaCuO2- δ的添加量为0～0.5mol时,GdBaCuO块材均能生长成表面没有宏观裂纹、尺寸为φ17mm的单畴,而BaCuO2-δ添加量为0.2mol时,样品的磁浮力性能最高,最大磁浮力密度达到12N/cm2 (77K).
参考文献
| [1] | Murakami M;Sakai N et al.Melt-processed light rare earth element-Ba-Cu-O[J].Superconductor Science and Technology,1996,9(12):1015. |
| [2] | Hu A;Jia S et al.Superconducting behaviours of melt textured Nd1+x Ba2-x Cu3Oy undergoing heat treatments in flowing argon and oxygen[J].Physica C,1996,272(3-4):297. |
| [3] | N. Hari Babu;E. S. Reddy;D. A. Cardwell;A. M. Campbell;C. D. Tarrant;K. R. Schneider .Artificial flux pinning centers in large, single-grain (RE)-Ba-Cu-O superconductors[J].Applied physics letters,2003(23):4806-4808. |
| [4] | Caixuan Xu;Anming Hu;Masaki Ichlhara .Transmission electron microscopy of air-processed Gd123 superconductors with the addition of Gd_2Ba_4McuO_x (M = Mo, Zr)[J].Superconductor Science & Technology,2006(12):1285-1290. |
| [5] | Shi Y;Hari Babu N et al.Superconducting properties of Gd-Ba-Cu-O single grains processed from a new,Ba-rich precursor compound[J].J Phys:Conference Series,2008,97(01):012250. |
| [6] | Hu A.;Sakai N.;Murakami M. .Large grain growth and superconducting properties of GdBa2Cu3O7-delta fabricated in air with BaCuO2-x addition[J].Physica, C. Superconductivity and its applications,2003(0):275-278. |
| [7] | Nariki S;Sakai N;Murakami M;Hirabayashi I .Fabrication and superconducting properties of Gd-Ba-Cu-O single-grain bulk with barium cerate addition[J].Physica, C. Superconductivity and its applications,2006(0):291-294. |
| [8] | Babu NH;Iida K;Shi Y;Cardwell DA .Fabrication of high performance light rare earth based single-grain superconductors in air[J].Applied physics letters,2005(20):2506-1-2506-3-0. |
| [9] | 徐晓燕,卢亚锋,冯建情,张翠萍,熊晓梅,刘国庆,于泽铭.MgO粉末添加对NdBaCuO籽晶的影响[J].稀有金属材料与工程,2010(10):1781-1784. |
| [10] | P Diko;M Sefcikova;K Zmorayova .Microstructure-related spacing and length of the oxygenation a/c-cracks in standard top-seeded melt-grown YBCO bulk superconductors[J].Superconductor Science & Technology,2006(7):S525-S529. |
| [11] | Diko P.;Habisreuther T.;Klupsch T.;Gornert P.;Gawalek W. .INFLUENCE OF Y2BACUO5 PARTICLES ON THE MICROSTRUCTURE OF YBA2CU3O7-X (123)-Y2BACUO5 (211) MELT-TEXTURED SUPERCONDUCTORS[J].Physical Review.B.Condensed Matter,1995(18):13658-13664. |
| [12] | A Hu;N Sakai;H Zhou .Single-grain growth, microstructure and superconducting properties of (Sm, Eu) 123 superconductors with BaCuO_(2-x) addition[J].Superconductor Science & Technology,2003(1):33-38. |
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