Heat treatment induced phase transformations in zirconia and yttriastabilized zirconia monolithic aerogels

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dc.contributor.authorTorres Rodríguez, Jorge Albertocs
dc.contributor.authorKalmár, Józsefcs
dc.contributor.authorMenelaou, Melitacs
dc.contributor.authorČelko, Ladislavcs
dc.contributor.authorDvořák, Karelcs
dc.contributor.authorCihlář, Jaroslavcs
dc.contributor.authorCihlář, Jaroslavcs
dc.contributor.authorKaiser, Jozefcs
dc.contributor.authorGyőri, Enikőcs
dc.contributor.authorVeres, Pétercs
dc.contributor.authorFábián, Istváncs
dc.contributor.authorLázár, Istváncs
dc.coverage.issue1cs
dc.coverage.volume149cs
dc.date.accessioned2020-11-10T16:22:57Z
dc.date.available2020-11-10T16:22:57Z
dc.date.issued2019-07-01cs
dc.description.abstractMonolithic, structurally stable zirconia (ZrO2) aerogels can be used in high temperature applications and as medical implants. The macroscopic properties of these solids can be fine-tuned by the appropriate thermal treatment of the amorphous aerogels. Herein, we investigate the thermally induced phase transitions of ZrO2 and yttria-stabilized zirconia (YSZ) monolithic aerogels. All aerogels were produced by an acid-catalyzed sol-gel technique and subsequent supercritical drying (SCD). A complete reaction mechanism is proposed for the formation of the wet gel network. Also, the phase transformations taking place during calcination were followed as function of temperature by in-situ X-ray diffraction measurements. Composition and size of the forming crystallites were calculated from the XRD data. Phase transition is controlled by the temperature-dependent growth of crystallite size during calcination up to 1200 °C. Both tetragonal and monoclinic zirconia form in pure ZrO2 aerogels, and a single tetragonal phase forms in YSZ aerogels.en
dc.description.embargo2021-02-27cs
dc.formattextcs
dc.format.extent54-63cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationJOURNAL OF SUPERCRITICAL FLUIDS. 2019, vol. 149, issue 1, p. 54-63.en
dc.identifier.doi10.1016/j.supflu.2019.02.011cs
dc.identifier.issn0896-8446cs
dc.identifier.other156507cs
dc.identifier.urihttp://hdl.handle.net/11012/195642
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofJOURNAL OF SUPERCRITICAL FLUIDScs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S089684461830771Xcs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0896-8446/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectAerogelen
dc.subjectZirconiaen
dc.subjectYttria-stabilized zirconiaen
dc.subjectHeat treatmenten
dc.subjectPhase transformationen
dc.titleHeat treatment induced phase transformations in zirconia and yttriastabilized zirconia monolithic aerogelsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionacceptedVersionen
sync.item.dbidVAV-156507en
sync.item.dbtypeVAVen
sync.item.insts2021.03.01 00:56:07en
sync.item.modts2021.03.01 00:14:41en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Charakterizace materiálů a pokročilé povlaky 1-06cs
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Technologie hmot a dílců AdMaScs
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