National Tsing Hua University Institutional Repository:ALUMINA AS A DEVITRIFICATION INHIBITOR DURING SINTERING OF BOROSILICATE GLASS POWDERS
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 54367/62174 (87%)
造訪人次 : 13948382      線上人數 : 46
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTHU 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
    National Tsing Hua University Institutional Repository > 工學院  > 材料科學工程學系 > 期刊論文 >  ALUMINA AS A DEVITRIFICATION INHIBITOR DURING SINTERING OF BOROSILICATE GLASS POWDERS


    請使用永久網址來引用或連結此文件: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/52284


    題名: ALUMINA AS A DEVITRIFICATION INHIBITOR DURING SINTERING OF BOROSILICATE GLASS POWDERS
    作者: JEAN JH;GUPTA TK
    教師: 簡朝和
    日期: 1993
    出版者: Wiley-Blackwell
    關聯: JOURNAL OF THE AMERICAN CERAMIC SOCIETY,Volume: 76,Issue: 8,Pages: 2010-2016,Published: AUG 1993
    關鍵詞: KINETICS
    摘要: Cristobalite is formed when borosilicate glass (Corning Code 7740) is sintered at temperatures ranging from 700-degrees to 1000-degrees-C. The precipitation kinetics, determined by XRD analysis, exhibit a characteristic incubation period which decreases with increasing sintering temperature, from 60-120 min at 700-degrees-C to 3-5 min at 1000-degrees-C. Activation analysis of precipitation shows an activation energy of 75 kJ/mol, which is close to that for the diffusion of Na+ in borosilicate glass, suggesting mass-transport-controlled kinetics.1,5 With added alumina content greater than a critical value, however, the cristobalite formation in the borosilicate glass is completely prevented at the sintering temperatures investigated. The critical alumina content is found to decrease with decreasing alumina particle size but with increasing sintering temperature. The above result, similar to observations previously made in a binary glass mixture containing a low-softening borosilicate glass (BSG) and a high-softening high silica glass (HSG)3 is attributed to a strong coupling between Al3+ from alumina and Na+ from borosilicate glass. The coupling reaction causes segregation of Na+ in borosilicate glass to alumina, thus forming a Na+- and Al3+-rich reaction layer around alumina particles far too rapid for cristobalite formation.
    URI: http://as.wiley.com/WileyCDA/Brand/id-35.html
    http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/52284
    顯示於類別:[材料科學工程學系] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML731檢視/開啟


    在NTHUR中所有的資料項目都受到原著作權保護,僅提供學術研究及教育使用,敬請尊重著作權人之權益。若須利用於商業或營利,請先取得著作權人授權。
    若發現本網站收錄之內容有侵害著作權人權益之情事,請權利人通知本網站管理者(smluo@lib.nthu.edu.tw),管理者將立即採取移除該內容等補救措施。

    SFX Query

    與系統管理員聯絡

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