Efeito da adição de fluoreto de lítio na sinterização da alumina
The incorporation of additives in the sintering of alumina (Al2O3) has the aim of improvement the ceramic processing and, consequently, the physicochemical properties of bulk ceramics. In the present study, the influence of litium fluoride (LiF) additive into Al2O3 sintering using a weight concentra...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | Brasil |
| Institución: | Instituto Militar de Engenharia (IME) |
| Repositorio: | C&T (Rio de Janeiro. Online) |
| Idioma: | portugués |
| OAI Identifier: | oai:meiramattos.eceme.ensino.eb.br:article/1947 |
| Acceso en línea: | https://ebrevistas.eb.mil.br/CT/article/view/1947 |
| Access Level: | acceso abierto |
| Palabra clave: | Alumina additive Litium fluoride sintering aditivo Fluoreto de lítio sinterização |
| Sumario: | The incorporation of additives in the sintering of alumina (Al2O3) has the aim of improvement the ceramic processing and, consequently, the physicochemical properties of bulk ceramics. In the present study, the influence of litium fluoride (LiF) additive into Al2O3 sintering using a weight concentration of 0.30% LiF at1400 oC /3h was studied. The particle size characterization indicated that the addition of LiF reduced the average particle size after milling the powders. The densification of bulk ceramics revealed higher values in the presence of LiF additive sintering. The superficial morphology of sintered Al2O3-LiF bulk ceramics were characterized by scanning electron microscopy (SEM), which revealed the formation of second phase in the grain boundary. X-ray diffraction (XRD) analysis identified this second phase as: LiAl5O |
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