文化大學機構典藏 CCUR:Item 987654321/2918
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 47249/51115 (92%)
造访人次 : 14101278      在线人数 : 368
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧：
  • 您可在西文检索词汇前后加上"双引号"，以获取较精准的检索结果
  • 若欲以作者姓名搜寻，建议至进阶搜寻限定作者字段，可获得较完整数据
    •  进阶搜寻
    主页 ‧ 登入 ‧ 上传 ‧ 说明 ‧ 关于CCUR ‧ 管理 到手机版


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/2918


    题名: Sedimentation, rheology and particle-packing structure of aqueous Al2O3 suspensions
    作者: Tseng WJ
    Wu CH
    贡献者: 材料所
    关键词: grain growth
    Al2O3
    sedimentation
    rheology
    aggregation
    日期: 2003
    上传时间: 2009-11-30 11:46:46 (UTC+8)
    摘要: Gravity settling, rheology and particle-packing structure of aqueous alumina suspensions have been investigated using sub-micrometer alpha-Al2O3 powders with an average particle size similar to0.2 mum dispersed in pure water. The suspension pH varied from 2 to 11. The interface that separated the supernatant from the sediment appeared to settle linearly with time during the sedimentation experiment, followed then by a gradual reach toward a minimal sediment height; to which, the height was pH and solids loading dependent. The suspensions tended to form a continuous particulate network that defined the gravity settling as phigreater than or equal to0.1 at pH 11. This resulted in a flocculated suspension structure which barely settled even after 24 h without disturbance. The flocculated suspensions exhibited correspondingly a shear-thinning flow character over given shear-rate range (gamma = 1-1000 s(-1)) examined, in contrast to an apparent transition of flow toward shear thickening from the shear thinning for the better-dispersed suspensions (pH = 2) at relatively high shear rates (gamma greater than or equal to 100 s(-1)). This finding suggested a breakdown of the particulate network into smaller flow units for the flocculated suspensions as shear rate was increased. Films made from the flocculated suspensions showed apparent cracking after drying. Microstructural examinations revealed that a pronounced grain growth occurred in the films made from the pH 2 suspensions after isothermal sintering. (C) 2003 Elsevier Ltd and Techna S.r.l. All rights reserved.
    關聯: CERAMICS INTERNATIONAL Volume: 29 Issue: 7 Pages: 821-828
    显示于类别:[化學工程與材料工程學系暨碩士班] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    index.html0KbText1817检视/开启


    在CCUR中所有的数据项都受到原著作权保护.

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