Study of crystallization, microstructure and mechanical properties of lithium disilicate glass-ceramics as a function of the sintering temperature

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorAeronautics Technological Institute (ITA)-
Autor(es): dc.creatorDe Morais, Dayana Campanelli [UNESP]-
Autor(es): dc.creatorSantos, Matheus Ferreira Theotonio-
Autor(es): dc.creatorCampos, Tiago Moreira Bastos-
Autor(es): dc.creatorTrichês, Eliandra De Sousa-
Autor(es): dc.creatorBorges, Alexandre Luiz Souto [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:53:54Z-
Data de disponibilização: dc.date.available2022-02-22T00:53:54Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-04-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.14295/bds.2021.v24i2.2378-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/208614-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/208614-
Descrição: dc.descriptionObjective: The purpose of the present study was to synthesize and characterize lithium disilicate glass-ceramics through the Li2O-SiO2 system for determining the most satisfactory sintering parameter by evaluating the crystalline composition, microstructure and mechanical properties. Material and methods: The glass-ceramics were prepared from a glass precursor by means of the melting/cooling technique with a composition of 33.33 Li2O and 66.67 SiO2 (mol.%). The specimens were compressed by the uniaxial pressing technique and three different thermal treatments were used for sintering: 850 °C (Group 1), 900 °C (Group 2), and 950 °C (Group 3), which were determined based on the differential scanning calorimetry (DSC) result. The glass-ceramics were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Archimedes method, microhardness and biaxial flexural strength analyses. Results: The results regarding XRD predominantly showed lithium disilicate phase for all the heat treatments performed. Moreover, grains with a needle form were more predominantly observed in the SEM images for Group 3, as well as a higher densification and consequently higher mechanical properties. In contrast, Group 1 presented the lowest mechanical properties and densification, as well as the highest porosity. Conclusion: The present study demonstrated how extremely important it is to follow the heat treatment recommended by the manufacturers of ceramics, including time and temperature, which possess direct effects in the crystalline phase formation, as well as in the material’s microstructure and mechanical properties.-
Descrição: dc.descriptionSão Paulo State University (Unesp) Institute of Science and Technology Department of Dental Materials and Prosthodontics-
Descrição: dc.descriptionDepartment of Bioceramics Federal University of São Paulo (Unifesp)-
Descrição: dc.descriptionAeronautics Technological Institute (ITA)-
Descrição: dc.descriptionSão Paulo State University (Unesp) Institute of Science and Technology Department of Dental Materials and Prosthodontics-
Formato: dc.format1-9-
Idioma: dc.languageen-
Relação: dc.relationBrazilian Dental Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCrystallization-
Palavras-chave: dc.subjectGlass-ceramics-
Palavras-chave: dc.subjectLithium disilicate-
Título: dc.titleStudy of crystallization, microstructure and mechanical properties of lithium disilicate glass-ceramics as a function of the sintering temperature-
Título: dc.titleEstudo da cristalização, microestrutura e propriedades mecânicas de uma vitrocerâmica de dissilicato de lítio em função da temperatura de sinterização-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.