Applications of the zero-order reaction rate model and transition state theory on the intra-particle sintering of an alumina powder by using surface area measurements

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dc.contributor.authorSarikaya, Y.
dc.contributor.authorAda, K.
dc.contributor.authorÖnal, M.
dc.date.accessioned2020-06-25T17:43:50Z
dc.date.available2020-06-25T17:43:50Z
dc.date.issued2007
dc.descriptionOnal, Muserref/0000-0002-1540-8389
dc.description.abstractThe cylindrical compacts with the diameter of 14mm were prepared under 32MPa of an alumina powder having agglomeration degree of 80% and maximum surface area of 81 m(2) g(-1) after calcination at 900 degrees C for 2 h. Each compact was fired isothermally at a different temperature between 950 and 1150 degrees C for 2 h. The rate constant for each temperature was obtained from the application of the zero-order reaction rate model on the surface area measurements after sintering. Arrhenius equation for the sintering was obtained in the form: k = (8.09 x 10(6) m(2) mol(-1) s(-1)) exp (-187 643 J mol(-1)/RT). Transition state theory was applied to the sintering and thermodynamic parameters of the activation were calculated. The relation of these parameters in SI units can be summarized in the forms: Delta H-# = 178 643 - 8.314T, Delta S-# = -73.6 - 8.314 ln T, and ln K-# = -Delta G(#)/RT = -(Delta H-# - T Delta S-#)/RT= -21 487/T - ln T - 7.853, where Delta G(#), Delta H-#, Delta S-# and K-# are the Gibbs free energy, enthalpy, entropy, and equilibrium constant of activation. (c) 2006 Elsevier B.V. All rights reserved.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1016/j.jallcom.2006.05.100
dc.identifier.endpage199en_US
dc.identifier.issn0925-8388
dc.identifier.issue1-2en_US
dc.identifier.scopus2-s2.0-33847392148
dc.identifier.scopusqualityQ1
dc.identifier.startpage194en_US
dc.identifier.urihttps://doi.org10.1016/j.jallcom.2006.05.100
dc.identifier.urihttps://hdl.handle.net/20.500.12587/3919
dc.identifier.volume432en_US
dc.identifier.wosWOS:000245486300040
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Saen_US
dc.relation.ispartofJournal Of Alloys And Compounds
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectactivation parametersen_US
dc.subjectaluminaen_US
dc.subjectsintering rateen_US
dc.subjectsurface areaen_US
dc.subjecttransition stateen_US
dc.titleApplications of the zero-order reaction rate model and transition state theory on the intra-particle sintering of an alumina powder by using surface area measurementsen_US
dc.typeArticle

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