以Ni合金为基底的YBCO涂层导体具有三明治结构,从下至上分别是:Ni合金、缓冲层、YBCO涂层与稳定层.在实用超导薄膜内部,局域超导电流由于晶粒弱连接、缺陷或裂纹等原因突然消失的情况下,一旦能量耗散超过临界值将会导致超导薄膜失超.在典型的YBCO涂层导体结构中,由于缓冲层是绝缘的氧化物,只能通过顶层的Ag或Cu稳定层的分流来实现电流传输方向的调整.如果在YBCO与正常金属基底之间存在连续的导体连接,即缓冲层导电,就可以不需稳定层,减少涂层导体的整体厚度,提高工程临界电流密度JE·如果钙钛矿导电缓冲层均匀无裂纹且足够厚,就可以起到隔离、外延、电流传输三重功效,同时提高JE·采用伞化学溶液法制备了具有(001)择优取向的BaPbO3,La0.5Sr0.5TiO3钙钛矿导电缓冲层与YBCO涂层,对于探索低成本的实用化工艺路线具有重要的实际应用价值.
参考文献
[1] | Hawsey RA;Christen DK .Progress in research, development, and pre-commercial deployment of second generation HTS wires in the USA[J].Physica, C. Superconductivity and its applications,2006(0):488-495. |
[2] | Cantoni C.;Aytug T.;Verebelyi D.T.;Paranthaman M.;Specht E.D.;Norton D.P.;Christen D.K. .Conductive buffer layers and overlayers for the thermal stabilityof coated conductors[J].IEEE Transactions on Applied Superconductivity: A Publication of the IEEE Superconductivity Committee,2001(1):3309-3312. |
[3] | Kim K;Paranthaman M;Norton1 D P et al.A perspective on conducting oxide buffers for Cu-based YBCO-coated conductors[J].Supercood Sci Technol,2006,19:R23-R29. |
[4] | T. Aytug;B. W. Kang;C. Cantoni .Growth and characterization of conductive SrRuO_3 and LaNiO_3 multilayers on textured Ni tapes for high-J_c YBa_2Cu_3O_(7-#delta#) coated conductors[J].Journal of Materials Research,2001(9):2661-2669. |
[5] | Aytug T;Paranthaman M;Zhai HY;Gapud AA;Leonard KJ;Martin PM;Goyal A;Thompson JR;Christen DK .An approach for electrical self-stabilization of high-temperature superconducting wires for power applications[J].Applied physics letters,2004(14):2887-2889. |
[6] | T. Aytug;M. Paranthaman;J. R. Thompson;A. Goyal;N. Rutter;H. Y. Zhai;A. A. Gapud;A. O. Ijaduola;D. K. Christen .Electrical and magnetic properties of conductive Cu-based coated conductors[J].Applied physics letters,2003(19):3963-3965. |
[7] | Kyunghoon Kim;Norton D.P.;Cantoni C.;Aytug T.;Gapud A.A.;Paranthaman M.P.;Goyal A.;Christen D.K. .(La,Sr)TiO<SUB>3</SUB> as a conductive buffer for high-temperature superconducting coated conductors[J].IEEE Transactions on Applied Superconductivity: A Publication of the IEEE Superconductivity Committee,2005(2):2997-3000. |
[8] | F.H.Li,Z.G.Fan,J.Wang,C.S.Liu,D.W.Soh,Y.J.Cho.EFFECTS OF Pb COMPOUND ADDITIVES ON THE PROPERTIES OF YBa2Cu3O7-δ[J].金属学报(英文版),2005(02):145-148. |
[9] | Hsieh Y H;Fu S L .Electrical and stability characteristics of BaPbO3 ceramics[J].Ceramics Internanonal,1992,18(05):289-293. |
[10] | 何菊生,张萌,肖祁陵.半导体外延层晶格失配度的计算[J].南昌大学学报(理科版),2006(01):63-67,102. |
[11] | Hühne R;Fahler S;Schultz L et al.Thin biaxially textured MgO and TiN films prepared by ion -beam assisted pulsed laser deposition for coate conductor applications[J].Physica C,2005,426-431:893-898. |
[12] | 李风华;高锋;李英楠.前驱液对金属有机物沉积YBCO薄膜质量的影响[A].北京,2009:7.5-7.8. |
[13] | Kim K;Norton DP;Christen DK;Cantoni C;Aytug T;Goyal A .Epitaxial (La, Sr)TiO3 on textured Ni-W as a conductive buffer architecture for high temperature superconducting coated conductor[J].Physica, C. Superconductivity and its applications,2008(13):961-967. |
[14] | Bean C P .Magnetization of hard superconductots[J].Phys Key Lett,1962,8(06):250-253. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%