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dc.contributor.authorPtáček, Petrcs
dc.contributor.authorŠoukal, Františekcs
dc.contributor.authorOpravil, Tomášcs
dc.contributor.authorBartoníčková, Evacs
dc.contributor.authorWasserbauer, Jaromírcs
dc.date.accessioned2020-08-04T10:59:22Z
dc.date.available2020-08-04T10:59:22Z
dc.date.issued2016-05-15cs
dc.identifier.citationCeramics International. 2016, vol. 42, issue 7, p. 8170-8178.en
dc.identifier.issn0272-8842cs
dc.identifier.other131581cs
dc.identifier.urihttp://hdl.handle.net/11012/70008
dc.description.abstractThe reaction mechanism, the equilibrium composition, the temperature range of stability of formed intermediates as well as the kinetics and thermodynamics of activated state during the formation of monoclinic strontium-aluminum-silicate feldspar stroncian (SrAl2Si2O8) via the ceramic route from the mixture of SrCO3, Al2O3 and SiO2 is described in this work. Strontian does not appear up to the temperature of 1150 degrees C and is the only stable phase at the temperature >= 1600 degrees C. Three independent reactions lead to two parallel reaction pathways, i.e. the formation of strontian from single or binary oxides (1) and with Sr-gehlenite as the intermediate (2). Since the reaction rate constants ratio is higher than one (k(1)/k(2) > 1), the first reaction route is favored according to the Wegscheider principle. The kinetics of chemical reaction of 1.5 order corresponding to the kinetic function F-2/3 ((1 - alpha)(-1/2) - 1) was determined as the rate determining the mechanism of formation of strontian. The integral and differential methods show that the process requires average apparent activation energy of 229.3 kJ mol(-1). The determined average value of frequency factor is 2.1 x 10(5) S-1en
dc.formattextcs
dc.format.extent8170-8178cs
dc.format.mimetypeapplication/pdfcs
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofCeramics Internationalcs
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S0272884216002856cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectStrontianen
dc.subjectSr-celsianen
dc.subjectFeldsparen
dc.subjectCeramicen
dc.subjectSr-gehleniteen
dc.subjectKineticsen
dc.titleThe formation of feldspar strontian (SrAl2Si2O8) via ceramic route: Reaction mechanism, kinetics and thermodynamics of the processen
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. CMV - laboratoř kovů a korozecs
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. CMV - laboratoř anorganických materiálůcs
sync.item.dbidVAV-131581en
sync.item.dbtypeVAVen
sync.item.insts2020.08.04 12:59:22en
sync.item.modts2020.08.04 12:25:03en
dc.coverage.issue7cs
dc.coverage.volume42cs
dc.identifier.doi10.1016/j.ceramint.2016.02.024cs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0272-8842/cs
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen


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