无机材料学报

• 研究论文 • 上一篇    下一篇

溶胶-凝胶法制备莫来石粉体

靳喜海; 高濂; 郭景坤   

  1. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:2000-05-25 修回日期:2000-07-10 出版日期:2001-05-20 网络出版日期:2001-05-20

Preparation of Mullite Powders by Sol-Gel Methods

JIN Xi-Hai; GAO Lian; GUO Jing-Kun   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructures; Shanghai Institute of Ceramics; Shanghai 200050; China
  • Received:2000-05-25 Revised:2000-07-10 Published:2001-05-20 Online:2001-05-20

摘要: 通过溶胶-凝胶法制备了高纯超细莫来石先驱体.并运用XRD和IR等手段对其晶化行为进行了研究.发现新制备的莫来石凝胶由拜耳石(Al(OH))和无定型氧化硅组成,它经由γ-Al和铝硅尖晶石,在1250℃转化为莫来石.所得到的莫来石粉体晶粒细小,呈薄片状.

关键词: 莫来石, 溶胶-凝胶, IR, XRD

Abstract: Superfine Al2O3-SiO2 gel of mullite composition was prepared by a sol-gel method, using TEOS and aluminium chloride hexahydrates as starting materials. Its mullitization process was monitored by DTA, XRD and IR measurements. The as-received gel is a diphasic one, comprising of bayerite and amorphous silica. By going through transition phases of γ-Al2O3 and Al-Si spinel, this gel transforms to mullite at 1250℃. The mullite powder obtained has a very fine grain size and shows a plate-like morphology.

Key words: mullite, sol-gel, XRD, IR

中图分类号: