Use este identificador para citar ou linkar para este item: http://repositorio.ufc.br/handle/riufc/68258
Tipo: Artigo de Periódico
Título: Structural and mechanical study of the sintering effect in hydroxyapatite doped with iron oxide
Autor(es): Pinto Filho, Francisco
Nogueira, Ricardo Emílio Ferreira Quevedo
Graça, Manuel Pedro Fernandes
Valente, Manuel Almeida
Sombra, Antônio Sérgio Bezerra
Silva, Cléber Cândido da
Palavras-chave: Biomaterials;Dielectrics
Data do documento: 2008
Instituição/Editor/Publicador: Physica B: Condensed Matte
Citação: PINTO FILHO, Francisco et al. Structural and mechanical study of the sintering effect in hydroxyapatite doped with iron oxide. Physica B: Condensed Matter, [s. l.], v. 403, n. 19-20, p. 3826-3829, 2008.
Abstract: Calcium phosphates are very important for applications in medicine due to their properties such as biocompatibility and bioactivity. In order to improve their properties, substitution of calcium with other ions has been proposed. Partial substitution of calcium by different ions has been made as a way to improve the properties of the calcium phosphates and also to allow new applications of apatites in medicine. In this work, hydroxyapatite Ca10(PO4)6(OH)2—HAP], prepared by high-energy dry milling (20 h), was mixed with different amounts of iron oxide (0.5, 1, 2.5 and 5 wt%). The mixtures were calcinated at 900 1C for 5 h with a heating rate of 3 1C/min in an attempt to introduce the iron oxide in the HAP structure. Small discs (12.5 mm +) were uniaxially pressed under a load of 2 t for 2 min. The pellets were sintered at 1000, 1200 and 1300 1C for 5 h in air. The main purpose of this work is to study why the iron oxide concentration and the heat treatment of the samples change the microhardness of the obtained ceramics. The sintered samples were characterized by X-ray diffraction (XRD), Vickers Microhardness and scanning electron microscopy (SEM).
URI: http://www.repositorio.ufc.br/handle/riufc/68258
ISSN: 0921-4526
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