MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
 
Mechanochemical Activation on the Preparation of β-Eucryptite from Powder Mixture of Pyrophyllite, Gibbsite and Lithium Carbonate
Wantae KimKwanho KimHoon LeeMinchul ShinSangbae Kim
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2013 Volume 54 Issue 3 Pages 380-383

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Abstract

β-eucryptite (Li2O·Al2O3·2SiO2) was prepared by mechanochemical activation followed by calcination of the powder mixture containing pyrophyllite, gibbsite and lithium carbonate. XRD and FT-IR results showed that the crystallization of β-eucryptite occurred from the milled mixture by calcination. Dry milling using a planetary mill promoted the amorphization of the mixture. The crystallization of β-eucryptite increased with increment of milling time and calcination temperature. Trace amount of undesired phases such as cristobalite and quartz disappeared completely at 950°C in the mixture milled for 120 min. The thermal expansion behavior characteristics were found to be strongly influenced by the milling time of the constituent powder mixture and calcination temperature.

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© 2013 The Japan Institute of Metals and Materials
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