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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

AlOOH对Al2O3直接凝固注模成型的动电特性、流变性及凝固过程的影响

谢志鹏; 杨金龙; 黄勇; WillJ+; GaucklerLJ+   

  1. 清华大学材料科学与工程系; 北京100084; +Swiss Federal Institute of Technology; Zurich
  • 收稿日期:1996-09-19 修回日期:1996-11-25 出版日期:1997-10-20 网络出版日期:1997-10-20

The Effect of Boehmite on Electrokinetic Behaviours, Rheology and Coagulation for Direct Coagulation Casting of Alumina

XIE Zhipeng; YANG Jinlong; HUANG Yong; WillJ+; GaucklerLJ+   

  1. Department of Materials Science and Engineering Tsinghua University Beijing 100084 China; +Swiss Federal Institute of Technology; Zurich; Switzerland
  • Received:1996-09-19 Revised:1996-11-25 Published:1997-10-20 Online:1997-10-20

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摘要： 直接凝固注模成型（DCC）是一种新的近净尺寸的陶瓷成型技术；但湿坯强度较低（与注凝成型和注射成型相比）．为了提高Al2O3直接凝固成型后的坯体强度，在Al2O3－DCC过程中引入AlOOH本文系统考察了Al2O3＋AlOOH体系的电动特性、流变性及凝固过程．重点讨论了AlOOH加入对体系凝固行为，如活性酶添加量、固化过程动力学的影响．

关键词: 直接凝固注模成型, 氧化铝, AlOOH

Abstract: Direct Coagulation Casting (DCC) is a novel near net shape process for ceramics materials. However, the green body strength by DCC is low compared with gelcasting
and injection molding. Boehmite sol was added for α-Al2O3-DCC in order to increase the green strength of alumina. In this paper, the characteristics of electrokinetics, rheology and coagulation process were invesigated for the system of Al2O3+AlOOH. In
special the effects of AlOOH addition on coagulation behaviours such as amount of enzyme and kinetics of consolidation process were discussed.

Key words: direct coagulation casting, alumina, boehmite