利用醋酸盐为起始原料,乙二醇甲醚为溶剂,以二乙烯三胺、乳酸和丙酸为络合剂,制备了稳定的YBa2Cu3O7-δ(YBCO)溶胶.溶胶经干燥形成凝胶后,再通过热分解及高温煅烧,获得了YBCO粉体.利用X射线衍射对粉体进行了物相分析,利用透射电子显微镜观察了粉体形貌并分析了其晶体结构.结果表明该粉体粒径在几十到几百纳米,其晶体结构为正交钙钛矿结构.把该粉体压制而成的YBCO块体,在900℃氧气条件下烧结1h,即得到了临界转变温度(Tc)为92.5K的高温超导体.
参考文献
| [1] | Huhtinen H.;Lahderanta E.;Paturi P.;Raittila J.;Stepanov Y.;Laiho R. .YBCO nanopowder: novel material for PLD preparation of thin films[J].Physica, C. Superconductivity and its applications,2000(Pt.4):2377-2378. |
| [2] | Paturi P.;Raittila J.;Grivel JC.;Huhtinen H.;Seifi B.;Laiho R. Andersen NH. .Preparing superconducting nanopowder based YBCO/Ag tapes[J].Physica, C. Superconductivity and its applications,2002(Pt.2):779-781. |
| [3] | H.Y. Pan;X.L. Xu;J.D. Guo .TEM characterization of nanoscale YBCO particles[J].Materials Letters,2003(24/25):3869-3873. |
| [4] | M. Ochsenkuhn-Petropoulou;R. Argyropoulou;P. Tarantilis .Comparison of the oxalate co-precipitation and the solid state reaction methods for the production of high temperature superconducting powders and coatings[J].Journal of Materials Processing Technology,2002(1):122-128. |
| [5] | L.C. Pathak;S.K. Mishra;D. Bhattacharya .Synthesis and sintering characteristics of Y-Ba-Cu-oxide superconductors[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,2004(2):119-131. |
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