English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 58286/91808 (63%)
造訪人次 : 13820198      線上人數 : 63
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/69606


    題名: Electrical, thermal and microstructural study of high temperature superconducting composites
    其他題名: 高溫超導複合物的電、熱、及微觀結構之研究
    作者: Ling, D. C.;Wang, M. J.;Lin, J. L.;Wu, M. K.;Yao, Y. D.;Chien, F. Z.;Huang, C. Y.
    貢獻者: 淡江大學物理學系
    關鍵詞: 磁通釘札;超導複合材料;臨界電流密度;表面限制擴散;Flux Pinning;Superconducting Composite;Critical Current Density;Surface Limited Diffusion
    日期: 1990-04
    上傳時間: 2011-10-23 18:41:52 (UTC+8)
    出版者: 新竹市:清華大學
    摘要: 為增加高溫超導氧化物的電性和機械性 ,我們製備了呈磁浮效應的高溫超導複合物。 製作過程的條件對此類高溫超導 REBa/sub 2/Cu/sub 3/O/sub 7//AgO (RE123/AgO,RE=稀土族)複合物的形成很重要 。REBa/sub 2/Cu/sub 3/O /sub 7//AgO表現出 極大的剩餘磁性,暗示強烈釘札效應(pinning effect)之存在。高溫下分析 Ag/sub 2/O所產 生的多餘氧氣,具有穩定123超導相的作用。Ag 可能也是粒子增長的良好媒介和釘札中心的沈 澱物。在磁場下靠近臨界溫度(Tc)的電阻,顯 示相流動(slip-page)負責超導現象。熱均壓 壓縮法(hot isostatic pressing)的研究指出 :在高密度材料,銀氧化物加速增密作用 (densification)並提高氧的傳輸。大部分的銀 粒子增密作用可能是由於變形作用(yielding) 。
    In an attempt to enhance the electrical and mechanical properties of the high temperature superconducting oxides, we have prepared high T/sub c/ composites which exhibit magnetic suspension effect. Processing conditions are found to be critical for the formation of these high T/sub c/ REBa/sub 2/Cu/sub 3/O/sub 7//AgO (RE123/AgO, RE=Rare Earth) composites which show extremely large residual magnetization, indicating strong pinning effect. The presence of extra oxygen due to the decomposition of Ag/sub 2/O at high temperature is found to stabilize the superconducting 123 phase. Ag may also serve as clean flux for grain growth and precipitate as pinning centers. The resistance near T/sub c/ at high field reveals that the phase slippage is responsible for the transition. HIP (Hot Isostatic Pressing) study indicates that the silver oxide speeds densification and promotes oxygen transport within the dense material. Most of the densification of the silver particles results from yielding.
    關聯: 中國材料科學學會民國79年度年會論文集=Proceedings of the 1990 Annual Conference of the Chinese Society for Materials Science, pp.613-619
    顯示於類別:[物理學系暨研究所] 會議論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    index.html0KbHTML216檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

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