Crystallization kinetics and structure refinement of catio3 glass-ceramics produced by melt-quenching technique

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dc.contributor.authorDa Silveira, Wagner [UNESP]
dc.contributor.authorMacedo, Wagner Costa [UNESP]
dc.contributor.authorDe Almeida Santos, Gleyson Tadeu [UNESP]
dc.contributor.authorDos Santos, Luis Fernando [UNESP]
dc.contributor.authorFernandes, José Diego [UNESP]
dc.contributor.authorDe Oliveira Rocha, Kleper [UNESP]
dc.contributor.authorTeixeira, Silvio Rainho [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-29T08:32:04Z
dc.date.available2022-04-29T08:32:04Z
dc.date.issued2021-01-01
dc.description.abstractGlass-ceramic materials were obtained by heat treatment (960°C for 2, 4, and 6 hs) of glasses with CaCO3 47.50 wt%-TiO2 23.75 wt%-SiO2 23.75-Al2O3 5.00 wt% formulation produced by the melt-quenching technique (melting at 1650°C and subsequent annealing at 650°C). The materials' structural characterization and crystallization kinetics (Kissinger method) indicate the presence of CaTiO3, CaSiO3, and CaTiSiO5 crystalline phases with activation energies 217, 281, and 446 kJ/mol, respectively. The structure refinement (Rietveld method) suggests metastability for the CaSiO3 and CaTiSiO5 phases as a function of the heat treatment time. The increase in time favors CaTiO3 crystallization, from 62.97 wt%, in the 2 hs treated sample, to 79.21 wt%, in the 6 hs treated sample. EDS and microstructure analyses confirm the glass-ceramic production and indicate segregation of the CaTiO3 phase for longer heat treatment times.en
dc.description.affiliationUniversidade Estadual Paulista (UNESP) Faculdade de Ciências e Tecnologia Departamento de Física
dc.description.affiliationUniversidade Estadual Paulista (UNESP) Faculdade de Ciências Departamento de Química
dc.description.affiliationUnespUniversidade Estadual Paulista (UNESP) Faculdade de Ciências e Tecnologia Departamento de Física
dc.description.affiliationUnespUniversidade Estadual Paulista (UNESP) Faculdade de Ciências Departamento de Química
dc.identifierhttp://dx.doi.org/10.1590/1980-5373-MR-2021-0027
dc.identifier.citationMaterials Research, v. 24.
dc.identifier.doi10.1590/1980-5373-MR-2021-0027
dc.identifier.issn1980-5373
dc.identifier.issn1516-1439
dc.identifier.scopus2-s2.0-85112675964
dc.identifier.urihttp://hdl.handle.net/11449/229345
dc.language.isoeng
dc.relation.ispartofMaterials Research
dc.sourceScopus
dc.subjectCaTiO3
dc.subjectGlass-ceramics
dc.subjectKissinger Method
dc.subjectMelt-quenching Technique
dc.subjectRietveld Method
dc.titleCrystallization kinetics and structure refinement of catio3 glass-ceramics produced by melt-quenching techniqueen
dc.typeArtigo
unesp.departmentQuímica - FCpt

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Artigos - Física, Química e Biologia - FCT
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