Contribution to porous mullite synthesis from clays by adding Al and Mg powders

被引：48
作者：
Esharghawi, A. [1 ]
Penot, C. [1 ]
Nardou, F. [1 ]
机构：
[1] Univ Limoges, UMR 6638, CNRS, SPCTS, F-87060 Limoges, France
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2009年 / 29卷 / 01期
关键词：
Sintering; Porosity; Clays; Mullite; Al; Mg; MULLITISATION BEHAVIOR; ALUMINUM POWDERS; CERAMICS; PHASE; COMPOSITES; KAOLINITE; PARAMETERS; OXIDATION; KINETICS; KYANITE;
D O I：
10.1016/j.jeurceramsoc.2008.05.036
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：
This work has been undertaken to consider the production of porous mullite from kaolinitic clays. X-ray diffraction, scanning electron microscopy, thermogravimetry, differential thermal and dilatometry analyses were performed to study their thermal behavior. Pure and porous mullite was obtained by adding aluminum metal powder to kaolinite and hot processing in oxidizing atmosphere. Comparative studies were carried out to evaluate the influence of various weight ratios of magnesium on both the formation and reactive sintering of mullite. Porosity was shown to be increased with magnesium content while needle-like mullite crystals could be observed. (c) 2008 Elsevier Ltd. All rights reserved.
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收藏
页码：31 / 38
页数：8
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