Mullitization, microstructure and physical properties of mechanically activated andalusite sintered by microwave

In this work, the effects of mechanical activation and microwave heating of andalusite on mullite formation have been investigated. XRD results revealed that andalusite peaks disappeared after 60h of milling and the peaks of alumina were observed. The formation of mullite from activated and as-recei...

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Bibliographic Details
Published in:Ceramics international 2013-03, Vol.39 (2), p.1451-1454
Main Authors: Abdi, M.S., Ebadzadeh, T.
Format: Article
Language:English
Subjects:
Andalusite
Mechanical activation
Microwave sintering
Mullitization
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Summary:In this work, the effects of mechanical activation and microwave heating of andalusite on mullite formation have been investigated. XRD results revealed that andalusite peaks disappeared after 60h of milling and the peaks of alumina were observed. The formation of mullite from activated and as-received andalusite occurred at 800° and 1250°C, respectively, while mullitization was completed at 1100° and 1400°C in the former and latter, respectively. Mullite samples prepared from activated andalusite showed better densification with an elongated morphology.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2012.07.088