Effect of alkaline-earth oxides on phase formation and morphology development of mullite ceramics

被引：53
|
作者：
Kong, LB
Chen, YZ
Zhang, TS
Ma, J
Boey, F
Huang, H
机构：
[1] Natl Univ Singapore, Temasek Labs, Singapore 119260, Singapore
[2] Nanyang Technol Univ, Sch Mat Engn, Singapore 639798, Singapore
[3] Hong Kong Polytech Univ, Dept Engn Mech, Hong Kong, Hong Kong, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2004年 / 30卷 / 07期
关键词：
mullite; alkaline-earth oxide; anisotropic grain growth; mullitization;
D O I：
10.1016/j.ceramint.2003.12.019
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：
The effect of alkaline-earth oxides, including MgO, CaO, SrO and BaO, on the phase formation and morphology development of mullite (3Al(2)O(3).2SiO(2)) ceramics from oxide mixtures activated by a high-energy ball milling process, were investigated. Different alkaline-earth oxides demonstrated different influences on the mullitization behavior and morphology/microstructure development of the mullite ceramics. Mullitization temperature increased as the additives were from MgO to BaO. Well developed mullite whiskers were formed in the MgO doped group, while grains with normal shapes were observed in the cases of CaO, SrO and BaO. The dependence of both mullite formation temperature and morphology development on the kinds of alkaline-earth oxides were explained in terms of the mullitization mechanism of dissolution-precipitation. (C) 2004 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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页码：1319 / 1323
页数：5
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