Nucleation kinetics of crystalline phases from a kaolinitic body used in the processing of red ceramics

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dc.contributor.authorSilva, R. A. [UNESP]
dc.contributor.authorTeixeira, S. R. [UNESP]
dc.contributor.authorSouza, A. E. [UNESP]
dc.contributor.authorSantos, Dayse Iara dos [UNESP]
dc.contributor.authorRomero, M.
dc.contributor.authorMa. Rincon, J.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionCSIC
dc.date.accessioned2014-05-20T13:23:00Z
dc.date.available2014-05-20T13:23:00Z
dc.date.issued2011-04-01
dc.description.abstractThe crystallization kinetics of red ceramic raw material from the western part of São Paulo State, Brazil, was examined by differential thermal analysis (DTA) and X-ray diffraction (XRD). The chemical composition of the clay sample was determined by X-ray fluorescence (XRF). Non-isothermal crystallization kinetic methods have been applied to the study of the mechanism of crystallization in this kaolinitic material. The exothermic peak shifted to higher temperatures (945 to 974 degrees C) with increasing heating rate (10 to 50 degrees C/min). The average activation energies determined by the Kissinger method (787 +/- 85 kJ/mol) and the Ligero method (721 +/- 32 kJ/mol) are in agreement. The Avrami constant n obtained by the Ligero method and the m parameter (Matusita method) values were between 1 and 1.5, which indicate a three-dimensional crystal growth with polyhedral morphology and surface nucleation as the dominant mechanism. X-ray diffraction data indicate that this activation energy is not associated with the crystallization of mullite. Scanning electron microscopy (SEM) images of fired (1000 and 1190 degrees C) samples show their densification during the sinterization process. (C) 2011 Elsevier B.V. All rights reserved.en
dc.description.affiliationUNESP, Dept Fis Quim & Biol, Fac Ciencias & Tecnol, BR-19060080 Presidente Prudente, SP, Brazil
dc.description.affiliationUNESP, Dept Fis, BR-17033360 Bauru, SP, Brazil
dc.description.affiliationCSIC, Inst Ciencias Construcc Eduardo Torroja, Madrid 28033, Spain
dc.description.affiliationUnespUNESP, Dept Fis Quim & Biol, Fac Ciencias & Tecnol, BR-19060080 Presidente Prudente, SP, Brazil
dc.description.affiliationUnespUNESP, Dept Fis, BR-17033360 Bauru, SP, Brazil
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipPró-Reitoria de Pesquisa da UNESP (PROPe UNESP)
dc.description.sponsorshipIdFAPESP: 08/04368-4
dc.format.extent165-170
dc.identifierhttp://dx.doi.org/10.1016/j.clay.2011.02.019
dc.identifier.citationApplied Clay Science. Amsterdam: Elsevier B.V., v. 52, n. 1-2, p. 165-170, 2011.
dc.identifier.doi10.1016/j.clay.2011.02.019
dc.identifier.issn0169-1317
dc.identifier.lattes9256541983393135
dc.identifier.urihttp://hdl.handle.net/11449/6854
dc.identifier.wosWOS:000289610000023
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofApplied Clay Science
dc.relation.ispartofjcr3.641
dc.relation.ispartofsjr0,992
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectKineticsen
dc.subjectCrystallizationen
dc.subjectKaolinen
dc.subjectRed ceramicen
dc.subjectMulliteen
dc.titleNucleation kinetics of crystalline phases from a kaolinitic body used in the processing of red ceramicsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes9256541983393135
unesp.author.orcid0000-0002-6932-0649[1]
unesp.author.orcid0000-0002-5797-5971[2]
unesp.author.orcid0000-0003-1563-8149[5]
unesp.author.orcid0000-0003-1910-1445[6]
unesp.author.orcid0000-0002-9280-4334[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências e Tecnologia, Presidente Prudentept
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt
unesp.departmentFísica, Química e Biologia - FCTpt

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Presidente Prudente - FCT - Faculdade de Ciências e Tecnologia
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