高级检索
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直接凝固注模成型坯体强度等性能影响

谢志鹏; 杨金龙; 黄勇; Will J+; Cauckler L J+   

  1. 清华大学材料科学与工程系; 北京100084; +Swiss大学Federal Institute of Technology, Zurich, Switzerland

  • 收稿日期:1996-09-29 修回日期:1996-11-25 出版日期:1997-12-20 网络出版日期:1997-12-20

The Effect of Boehmite on Wet Green Strength for Direct Coagulation Casting of Alumina

XIE Zhipeng; YANG Jinlong; HUANG Yong; Will J+; Cauckler L J+   

  1. Department of Materials Science and Engineering; Tsinghua University Beijing 100084 China; +Swiss Federal Institute of Technology, Zurich; Switzerland

  • Received:1996-09-29 Revised:1996-11-25 Published:1997-12-20 Online:1997-12-20

PDF (PC)

842

摘要： 为了改善直接注模成型（DCC）氧化铝的坯体性能，在Al2O3－DCC过程中加入AlOOH，本文详细研究了Al2O3＋AlOOH体系的湿坯性能、干燥行为及烧结致密化过程.结果表明，少量AlOOH加入可显著提高Al2O3的湿坯抗压强度和弹性模量．当AlOOH体积含量＜3．0％时，对干燥过程没有影响．干燥坯体经无压烧结后可获得烧结密度达3．97g／cm3（99．7％TD）、显微结构均匀的小α-Al2O3相．

关键词: 直接凝固注模成型, 氧化铝, AlOOH

Abstract: In order to improve wet strength of DCC-green bodies boehmite sols were added into α-Al2O3 suspensions. In the present paper, the properties of wet green bodies, drying
behaviours and densification process of Al2O3+AlOOH system were studied. The results indicated that wet compressive strength and modulus could be largely
increased with a small amount of boehmite addition. As the solid loading of boehmite is less than 3 vol% there is no influence for drying process. The α-Al2O3 ceramics with
very high sintered densities of 3.97 g/cm3 (99.7% TD) and homogeneous microstructure could be achieved after sintering.

Key words: direct coagulation casting, alumina, boehmit