English  |  正體中文  |  简体中文  |  Items with full text/Total items : 51883/87052 (60%)
Visitors : 8459732      Online Users : 94
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/987654321/25170

    Title: Qualitative study on the reaction of Bi1.8Pb0.4Ca2Sr2Cu3Oy superconductor with water
    Authors: 王啟銘;Wang, C. M.;Wei, T. P.;高惠春;Kao, H. C. I.
    Contributors: 淡江大學化學學系
    Date: 1993-09-01
    Issue Date: 2009-12-01
    Publisher: Amsterdam: Elsevier BV * North-Holland
    Abstract: When Bi1.8Pb0.4Ca2Sr2Cu3Oy powders were immersed into deionized water, a large quantity of Ca2+ and Sr2+ ions was detected in the aqueous solution, indicating the decomposition of the Bi1.8Pb0.4Ca2Sr2Cu3Oy superconductors in water. The pH of the solution was initially increased rapidly to 11.1 due to the formation of OH- ions. However, after 30 min, in the open system, the Ca2+ and Sr2+ ions would further react with CO2 in the atmosphere to form sparingly soluble carbonates and the pH of the solution was slowly decreased to 9.81 over 20 h. Only a small amount of Bi3+, Pb2+ and Cu2+ ions was detected in the aqueous solution. Non-soluble products, such as Bi2CuO4, CuO and Cu6PbO8, were observed in the reaction residue which might act as a barrier to prevent deterioration of the superconductor with water in the bulk sample. The chemical equation was given as Bi1.8PbxCa2Sr2Cu3Oy(s)+4H2O→2Ca2+(aq)+2Sr2+(aq) +8OH-(aq)+0.9Bi2CuO4(s)+xCu6PbO8(s)+(3−0.9−6x)CuO(s).
    Relation: Physica C: superconductivity 214(1-2), pp.179-181
    DOI: 10.1016/0921-4534(93)90125-A
    Appears in Collections:[化學學系暨研究所] 期刊論文

    Files in This Item:

    File SizeFormat

    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