In situ neutron diffraction investigation on the phase transformation sequence of kaolinite and halloysite to mullite

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dc.contributor.authorTezuka, Nen_AU
dc.contributor.authorLow, IMen_AU
dc.contributor.authorDavies, IJen_AU
dc.contributor.authorPrior, MJen_AU
dc.contributor.authorStuder, AJen_AU
dc.date.accessioned2023-01-12T23:10:54Zen_AU
dc.date.available2023-01-12T23:10:54Zen_AU
dc.date.issued2006-11-15en_AU
dc.date.statistics2022-05-20en_AU
dc.descriptionPhysical copy held by ANSTO Library at DDC 539.7213/3. Part Ien_AU
dc.description.abstract“Kaolin” is a major raw material for the fabrication of conventional ceramics. In this work the authors have investigated the thermal phase transformation of mullite from two different types of kaolin (kaolinite and halloysite), with or without alumina matrix constraint, during heating up to 1500 °C and then cooling using in situ neutron diffraction. Mullitization was initiated upon heating to 1200 °C for all specimens and followed spinel formation at 1100 °C. Above this temperature, however, evolution of the main phases, i.e., mullite, cristobalite and corundum, was influenced by the presence of impurities, initial type of silica, and alumina constraint. The relative amount of mullite was largest for the pure kaolinite specimen, particularly during heating, and this was attributed to the presence of a glassy phase. However, kaolinite with alumina suppressed the crystallization of cristobalite from the glassy phase upon cooling due to a reaction between alumina and amorphous silica, consequently resulting in an amount of mullite as for the pure kaolinite specimen (approximately 65 wt%). Halloysite was less active in terms of mullitization due to the lower level of initial impurities and greater amount of cristobalite, particularly for the alumina-constrained specimen. However, the final amount of mullite derived from the pure halloysite specimen was similar to that as from the kaolinite specimen. Crown Copyright © 2006 Published by Elsevier B.V.en_AU
dc.identifier.citationTezuka, N., Low, I.-M., Davies, I. J., Prior, M., & Studer, A. (2006). In situ neutron diffraction investigation on the phase transformation sequence of kaolinite and halloysite to mullite. Paper presented at the Eighth International Conference on Neutron Scattering (ICNS 2005), "Neutrons for structure and dynamics - a new era", Sydney, Australia, 27 November to 2 December 2005. In Campbell, S. J., Cadogan, J. M., Furusaka, M., Hauser, N., & James, M. (Eds), Physica B: Condensed Matter, 385-386(Part 1), 555-557. doi:10.1016/j.physb.2006.05.357en_AU
dc.identifier.conferenceenddate2 December 2005en_AU
dc.identifier.conferencenameEighth International Conference on Neutron Scattering ICNS 2005: 'Neutrons for structure and dynamics - a new eraen_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate27 November 2005en_AU
dc.identifier.editorsCampbell, S. J., Cadogan, J. M., Furusaka, M., Hauser, N., & James, M.en_AU
dc.identifier.issn0921-4526en_AU
dc.identifier.issuePart 1en_AU
dc.identifier.journaltitlePhysica B: Condensed Matteren_AU
dc.identifier.pagination555-557en_AU
dc.identifier.urihttps://doi.org/10.1016/j.physb.2006.05.357en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14330en_AU
dc.identifier.volume385-386en_AU
dc.language.isoenen_AU
dc.publisherElsevier B. V.en_AU
dc.subjectMulliteen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectKaoliniteen_AU
dc.subjectClaysen_AU
dc.subjectCeramicsen_AU
dc.subjectPhase transformationsen_AU
dc.subjectTemperature range 1000-4000 Ken_AU
dc.subjectCoolingen_AU
dc.subjectHeatingen_AU
dc.subjectCrystallizationen_AU
dc.subjectAluminatesen_AU
dc.subjectCristobaliteen_AU
dc.titleIn situ neutron diffraction investigation on the phase transformation sequence of kaolinite and halloysite to mulliteen_AU
dc.typeConference Paperen_AU
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