English  |  正體中文  |  简体中文  |  Items with full text/Total items : 49103/83224 (59%)
Visitors : 7023314      Online Users : 58
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/25141


    Title: Preparation of La1.29Ca0.43Ba1.29Cu3Oy powder with different organic acids containing OH or NH2
    Authors: 高惠春;Kao, H. C. I.;Shy, J. T.;You, S. Y.;王啟銘;Wang, C. M.
    Contributors: 淡江大學化學學系
    Date: 2001-03
    Issue Date: 2009-12-01
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)
    Abstract: More than ten organic acids containing hydroxyl or amino groups were selected as a medium to prepare submicrometer superconducting powder of La1.29Ca0.43Ba1.29Cu3 Oy by using a polymeric precursor method. Heat treated samples were analyzed by IR spectrometer for the degree of polymerization, by ICP and EDS for the homogeneity, by SEM for the particle size determination. Tc measurement and the purity examination were obtained by resistivity and X-ray diffraction, respectively. Organic acids containing three carboxyl groups are highly recommended for preparing high-Tc superconductors. It donates electron pairs for chelating with metal ions and also for the polyesterification with ethylene glycol. On the other hand, organic acids containing amino group along with two or less carboxyl acid groups are not recommended for this purpose.
    Relation: IEEE transactions on applied superconductivity 11(1), pp.2854-2857
    DOI: 10.1109/77.919657
    Appears in Collections:[化學學系暨研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat
    1051-8223_11(1)p2854-2857.pdf414KbAdobe PDF383View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback