Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 88: Issue 1
A TG analysis of the effect of calcination conditions on the properties of reactive magnesia
Authors:
B. Liu Department Chemistry, Materials and Forensic Sciences, University of Technology Sydney, Sydney, Australia PO Box 123, Broadway NSW 2007

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P. Thomas Department Chemistry, Materials and Forensic Sciences, University of Technology Sydney, Sydney, Australia PO Box 123, Broadway NSW 2007

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A. Ray Department Chemistry, Materials and Forensic Sciences, University of Technology Sydney, Sydney, Australia PO Box 123, Broadway NSW 2007

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J. Guerbois Department Chemistry, Materials and Forensic Sciences, University of Technology Sydney, Sydney, Australia PO Box 123, Broadway NSW 2007

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Pages:
145–149
Online Publication Date:
08 Apr 2007
Publication Date:
01 Apr 2007
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-006-8106-0
Keywords:
brucite; calcination; hydration; magnesia; magnesite
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Abstract  

The reactivity of MgO obtained from calcination of magnesium carbonate at different temperatures has been investigated by means of hydration in a constant relative humidity environment at 40°C for periods up to 24 days. Natural magnesite and AR grade basic MgCO3 calcined in the range of 500–1000°C was characterised in terms of surface area, crystallite size, morphology, and hydration rate. It was found that the hydration rate is dependent on the surface area and crystallite size where temperature was the main variable affecting them. The most reactive MgO was produced at the lowest calcination temperature with the highest surface area and the smallest crystallite size. The basic MgO specimens showed higher degree of hydration compared to the natural MgO specimens due to the smaller surface area and larger crystallite size. The low MgO content of the starting natural magnesite is also attributable to the lower reactivity. This preliminary study serves as a mean to investigate potential utilisation of reactive MgO as a supplementary cementitious material in eco-friendly cements.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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