Analysis of glass substituted hydroxyapatite under different sintering routes

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Andrey Mariano dos Santos
Iana Costa Carvalho
Ygor Pereira de Lima
Amal Elzubair Eltom
Suzana Noronha Ferreira Ribeiro
Andre Luis de Vansconcelos
Marcelo Henrique Prado da Silva

Abstract

Hydroxyapatite is a calcium phosphate that is classified as a biomaterial. It is used in bone restorations as it has characteristics similar to the mineral phase of bone tissue. Substitutional apatites have been especially researched to obtain better parameters for their syntheses and improve their impact on final applications. In view of the importance of these compounds as a biomaterial, this research aimed to study sintered substituted hydroxyapatite compounds to identify the formed phases, their microstructure, morphology, and shrinkage after sintering. HA and a composite of HA with 4% calcium phosphate and magnesium-based glass were produced from precursors in solutions and then sintered at different temperature. Results were obtained regarding the phases present and their morphology for the different conditions of chemical composition and sintering route by XRD analysis and scanning electron microscopy. Density and diameter shrinkage were analyzed after green body sintering at 1350 ºC. The HA samples showed a hexagonal phase, greater density, greater shrinkag, and uniform morphology with fewer pores than the HA/glass composite samples. The addition of magnesium glass partially transformed HA into tricalcium phosphate.

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How to Cite
Santos, A. M. dos, Carvalho, I. C. ., de Lima , Y. P. ., Eltom, A. E., Ribeiro, . S. N. F. ., André Luis de Vasconcelos, & Silva, M. H. P. da. (2025). Analysis of glass substituted hydroxyapatite under different sintering routes . Revista Militar De Ciência E Tecnologia, 40(1), 67–73. https://doi.org/10.22491/rmct.v40i1.8902.pt
Section
Ciência dos Materiais

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