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Title: Effect of alkaline-earth oxides on phase formation and morphology development of mullite ceramics
Authors: Kong, L.B. 
Chen, Y.Z.
Zhang, T.S.
Ma, J.
Boey, F.
Huang, H.
Keywords: Anisotropic grain growth
D. Alkaline-earth oxide
D. Mullite
Issue Date: 2004
Citation: Kong, L.B., Chen, Y.Z., Zhang, T.S., Ma, J., Boey, F., Huang, H. (2004). Effect of alkaline-earth oxides on phase formation and morphology development of mullite ceramics. Ceramics International 30 (7) : 1319-1323. ScholarBank@NUS Repository.
Abstract: The effect of alkaline-earth oxides, including MgO, CaO, SrO and BaO, on the phase formation and morphology development of mullite (3Al2O 3·2SiO2) 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. © 2004 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Source Title: Ceramics International
ISSN: 02728842
DOI: 10.1016/j.ceramint.2003.12.019
Appears in Collections:Staff Publications

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