Preparation of mullite whisker skeleton porous ceramic

被引：23
作者：
Xu, Linfeng [1 ]
Xi, Xiuan [1 ,2 ]
Shui, Anze [1 ]
Zhu, Wenli [1 ]
机构：
[1] S China Univ Technol, Coll Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] Osaka Univ, Joining & Welding Res Inst, Osaka 5670047, Japan
来源：
CERAMICS INTERNATIONAL | 2015年 / 41卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Mullite; Firing system; Whisker skeleton; Porous ceramic; Ammonium hexafluoroalurninate; FOAM; FABRICATION;
D O I：
10.1016/j.ceramint.2015.04.097
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Sillimanite whisker skeleton porous ceramic was firstly prepared by an appropriate firing process from kaolinite and ammonium hexafluoroaluminate (ABA) as raw materials, then mullite whisker and corundum were produced by firing the sillimanite whisker skeleton at 1400 degrees C. Effect of firing system on the sillimanite whisker skeleton formation was examined in detail. A series of complex gas phase reactions between the kaolinite and ammonium hexafluoroaluminate (AHA) caused the sillimanite whisker skeleton formation in the ceramic body. The experimental results show that one-step firing process with fast heating rate leads to the hexagonal shaped alpha-Al2O3 platelet forming, but the slow heating rate or two-step firing processes can completely cause the whisker skeleton structure generation. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：11576 / 11579
页数：4
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