English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 64178/96951 (66%)
造訪人次 : 9497945      線上人數 : 15258
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: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/44156


    題名: Effects of pH and citric acid contents on characteristics of ester-derived BaFe12O19 powder
    作者: 余宣賦;Yu, Hsuan-fu;Huang, Kao-chao
    貢獻者: 淡江大學化學工程與材料工程學系
    關鍵詞: Barium ferrite;Precursor method;Hard magnets;Magnetic properties;Ceramics
    日期: 2003-04-01
    上傳時間: 2010-03-09 09:58:36 (UTC+8)
    出版者: Elsevier
    摘要: The single domain size of BaFe12O19 powder with crystallite sizes less than 200 nm was produced using a citric acid precursor method. Fe3+ and Ba2+, in a molar ratio of 12, were chelated by COOH− in an aqueous solution. After ethylene glycol additions, esterification, dehydration, and calcination led to the formation of ester-derived BaFe12O19 powder. High pH and/or high citric acid contents in the starting solution are required to complete chelate metallic ions in the solution and to form pure barium ferrite powder at 1073 K. Pure single magnetic domain BaFe12O19 particles of M(30 kOe)≈54 emu/g, Mr≈28 emu/g, and Hc≈3.7 kOe were produced using [citric acid]/[metallic ions]=1.5 and pH⩾7.
    關聯: Journal of magnetism and magnetic materials 260(3), pp.455-461
    DOI: 10.1016/S0304-8853(02)01389-6
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    0KbUnknown311檢視/開啟
    1-s2.0-S0304885302013896-main.pdf239KbAdobe PDF1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