Estimation of the diffusion coefficient of water evolved during the non-isothermal dehydration of Australian sedimentary opal

Thomas, PS; Šimon, P; Smallwood, A; Ray, AS

Estimation of the diffusion coefficient of water evolved during the non-isothermal dehydration of Australian sedimentary opal

Thomas, PS

Šimon, P Smallwood, A Ray, AS

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Publication Type:: Journal Article
Citation:: Journal of Thermal Analysis and Calorimetry, 2007, 88 (1), pp. 231 - 235
Issue Date:: 2007-04-01

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Field	Value	Language
dc.contributor.author	Thomas, PS https://orcid.org/0000-0001-6962-2121	en_US
dc.contributor.author	Šimon, P	en_US
dc.contributor.author	Smallwood, A	en_US
dc.contributor.author	Ray, AS	en_US
dc.date.issued	2007-04-01	en_US
dc.identifier.citation	Journal of Thermal Analysis and Calorimetry, 2007, 88 (1), pp. 231 - 235	en_US
dc.identifier.issn	1388-6150	en_US
dc.identifier.uri	http://hdl.handle.net/10453/645
dc.description.abstract	The dehydration of an opal specimen was investigated by thermogravimetric analysis (TG) in powder and bulk forms. The change in geometry resulted in a significant difference in the temperature range in which dehydration occurred with peak temperatures in the differential TG (DTG) curve for the hand ground opal at 203°C and for the bulk opal at 340°C. This difference was attributed to time taken for diffusion of free water in the bulk opal to the specimen surface prior to evolution as a registered mass loss. A model was proposed to account for the diffusion of water and was used to estimate the diffusion coefficient. © Springer-Verlag 2007.	en_US
dc.relation.ispartof	Journal of Thermal Analysis and Calorimetry	en_US
dc.relation.isbasedon	10.1007/s10973-006-8133-x	en_US
dc.subject.classification	Physical Chemistry	en_US
dc.title	Estimation of the diffusion coefficient of water evolved during the non-isothermal dehydration of Australian sedimentary opal	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	88	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	0303 Macromolecular and Materials Chemistry	en_US
utslib.for	0399 Other Chemical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	88	en_US

Abstract:

The dehydration of an opal specimen was investigated by thermogravimetric analysis (TG) in powder and bulk forms. The change in geometry resulted in a significant difference in the temperature range in which dehydration occurred with peak temperatures in the differential TG (DTG) curve for the hand ground opal at 203°C and for the bulk opal at 340°C. This difference was attributed to time taken for diffusion of free water in the bulk opal to the specimen surface prior to evolution as a registered mass loss. A model was proposed to account for the diffusion of water and was used to estimate the diffusion coefficient. © Springer-Verlag 2007.

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http://hdl.handle.net/10453/645