Comptes Rendus
Physique/Solides, fluides : structure
Élaboration et caractérisation d'un biomatériau à base de phosphates de calcium
Comptes Rendus. Physique, Observation of black holes and extreme gravitational events, Volume 8 (2007) no. 1, pp. 101-108.

Le composite phosphate tricalcique–fluorapatite présente une bonne aptitude au frittage à 1300 °C. Ainsi, des taux de densification de 90% ont pu être atteints pour 33,16% de fluorapatite. À 1300 °C, l'augmentation de la teneur de la fluorapatite dans le composite favorise la formation de la phase α du phosphate tricalcique. L'analyse par résonance magnétique nucléaire du solide 31P illustre la présence de trois types de sites tétraédriques pour le phosphate tricalcique, alors que la fluorapatite ne possède qu'un seul type de sites. Aux températures supérieures à 1300 °C, la densification est entravée par le grossissement exagéré des grains et la formation de larges pores.

The tricalcium phosphate–fluorapatite composite has a good aptitude to sintering at 1300 °C, so a densification rate of about 90% was reached with 33.16 wt% of fluorapatite. At 1300 °C, the increase of the content of fluorapatite in the composite favours the formation of the α tricalcium phosphate phase. The 31P MAS-NMR analysis reveals the presence of three tetrahedral P sites for the tricalcium phosphate, whereas the fluorapatite possesses only one. At temperatures higher than 1300 °C, the densification is hindered by grain growth and the formation of large pores.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crhy.2006.10.017
Mots-clés : Phosphate tricalcique, Fluorapatite, composite, Frittage, Densification, Microstructure, RMN-MAS 31P
Keywords: Tricalcium phosphate, Fluorapatite, Composite, Sintering, Densification, Microstructure, 31P MAS-NMR

Foued Ben Ayed 1, 2 ; Jamel Bouaziz 1

1 Laboratoire de chimie industrielle, École nationale d'ingénieurs de Sfax, BP W, 3038 Sfax, Tunisie
2 Institut préparatoire aux études d'ingénieurs de Sfax, BP 805, 3018 Sfax, Tunisie
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Foued Ben Ayed; Jamel Bouaziz. Élaboration et caractérisation d'un biomatériau à base de phosphates de calcium. Comptes Rendus. Physique, Observation of black holes and extreme gravitational events, Volume 8 (2007) no. 1, pp. 101-108. doi : 10.1016/j.crhy.2006.10.017. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2006.10.017/

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