Phase transformations in the Ca1-xSrxTiO3 perovskite system

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dc.contributor.authorDaniels, JEen_AU
dc.contributor.authorElcombe, MMen_AU
dc.contributor.authorFinlayson, TRen_AU
dc.contributor.authorVance, ERen_AU
dc.date.accessioned2021-09-06T05:50:48Zen_AU
dc.date.available2021-09-06T05:50:48Zen_AU
dc.date.issued2004-02-04en_AU
dc.date.statistics2021-08-24en_AU
dc.description.abstractThe mixed perovskite Ca1-xSrxTiO3 is one of the major constituent phases of SYNROC, a synthetic rock form proposed for the long term immobilisation of high-level nuclear waste [1]. A complete understanding of the crystal structures formed, and transitions within, each of the constituent phases is of vital importance to gaining a complete knowledge of the overall structural stability of SYNROC. This study investigated the transition temperatures and the space group symmetry of several samples between the composition values of x = 0.6 to 0.85. Previous studies of this compound have produced many conflicting results. It is believed that the reason for this is the sample preparation technique coupled with the form of the sample during experimentation, i.e., powder vs. polycrystalline solid. This study has attempted to produce samples using techniques closely related to those used in bulk SYNROC manufacture and to analyse these samples in their polycrystalline form as they would exist in SYNROC. Transition temperatures were determined by observing the dynamic Young’s modulus and internal friction of the samples between 4K and 420K using the Piezoelectric Ultrasonic Composite Oscillator Technique [2]. Classifications of the crystal structures formed were carried out using the High Resolution Powder Diffractometer at the Lucas Heights Research Reactor within the temperature range of 8K to 300K. Space group symmetries for each phase were then determined by Rietveld refinement.en_AU
dc.identifier.citationDaniels, J. E., Elcombe, M. M., Finlayson, T. R., & Vance, E. R. (2004). Phase transformations in the Ca1-xSrxTiO3 perovskite system. Poster presented to the 28th Annual Condensed Matter and Materials Meeting, Charles Sturt University, Wagga Wagga, 3-6 February 2004. Retrieved from: https://www.physics.org.au/wp-content/uploads/cmm/2004/04handbook.pdfen_AU
dc.identifier.conferenceenddate6 February 2004en_AU
dc.identifier.conferencename28th Annual Condensed Matter and Materials Meetingen_AU
dc.identifier.conferenceplaceWagga Wagga, New South Walesen_AU
dc.identifier.conferencestartdate3 February 2004en_AU
dc.identifier.issn1037-1214en_AU
dc.identifier.otherWP34en_AU
dc.identifier.urihttps://www.physics.org.au/wp-content/uploads/cmm/2004/04handbook.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11604en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectPhase transformationsen_AU
dc.subjectPerovskiteen_AU
dc.subjectSynthetic rocksen_AU
dc.subjectRadioactive wastesen_AU
dc.subjectSynthetic materialsen_AU
dc.subjectPolycrystalsen_AU
dc.subjectPiezometryen_AU
dc.subjectPile oscillation techniquesen_AU
dc.subjectDiffractionen_AU
dc.subjectANSTOen_AU
dc.titlePhase transformations in the Ca1-xSrxTiO3 perovskite systemen_AU
dc.typeConference Posteren_AU
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