Direct density determination of low- and high-density glassy polyamorphs following a liquid–liquid phase transition in Y2O3–Al2O3 supercooled liquids

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dc.contributor.author McMillan, Paul F.
dc.contributor.author Wilding, Martin C.
dc.date.accessioned 2010-01-19T11:04:04Z
dc.date.available 2010-01-19T11:04:04Z
dc.date.issued 2008-02-01
dc.identifier.citation McMillan , P F & Wilding , M C 2008 , ' Direct density determination of low- and high-density glassy polyamorphs following a liquid–liquid phase transition in Y2O3–Al2O3 supercooled liquids ' Journal of Non-Crystalline Solids , vol 354 , no. 10-11 , pp. 1015-1025 . en
dc.identifier.issn 0022-3093
dc.identifier.other PURE: 143670
dc.identifier.other dspace: 2160/3998
dc.identifier.uri http://hdl.handle.net/2160/3998
dc.description McMillan, P. F., Wilding, M. C. (2008). Direct density determination of low- and high-density glassy polyamorphs following a liquid–liquid phase transition in Y2O3–Al2O3 supercooled liquids. Journal Of Non-Crystalline Solids, 354 (10-11), 1015-1025. Sponsorship: US-NSF Grant; EPSRC en
dc.description.abstract Evidence has been presented for a density-driven phase transition occurring between supercooled liquids in the system Y2O3-Al2O3. The high- and low-density liquids were quenched to metastably coexisting glasses. Chemical analysis showed the compositions of the two glasses to be identical, and it was inferred that they differed in their densities and entropies. The entropy difference has been verified by calorimetry. Here, we confirm that the chemical compositions of the glassy materials derived from the high- and low-temperature liquids are identical. We present a direct density determination of the two. glasses using sink-float techniques. The measured densities are 3.72(3) g/cm(3) for the glass derived from the high-temperature liquid (i.e., the high-density amorphous or HDA polyamorph), and 3.58(1) g/cm(3) for the low-temperature (low-density, LDA) polyamorph. (C) 2007 Elsevier B.V. All rights reserved. en
dc.format.extent 11 en
dc.language.iso eng
dc.relation.ispartof Journal of Non-Crystalline Solids en
dc.subject AMORPHOUS SOLIDS en
dc.subject ALUMINATE GLASSES en
dc.subject MOLTEN Y3AL5O12 en
dc.subject HIGH-PRESSURE en
dc.subject phases and equilibria en
dc.subject POLYMORPHISM en
dc.subject SILICON en
dc.subject 1ST-ORDER TRANSITION en
dc.subject YTTRIUM en
dc.subject CRYSTALLINE en
dc.subject METASTABLE SOLIDIFICATION en
dc.title Direct density determination of low- and high-density glassy polyamorphs following a liquid–liquid phase transition in Y2O3–Al2O3 supercooled liquids en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.jnoncrysol.2007.08.011
dc.contributor.institution Institute of Mathematics & Physics (ADT) en
dc.contributor.institution Materials Research en
dc.description.status Peer reviewed en


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