Calcination and sintering of hydroxyfluorapatite powders

Calcination and sintering of hydroxyfluorapatite powders

A comparative study of calcination and sintering of hydroxyfluorapatite powders Ca 10(PO 4) 6(OH) x F 2− x substituted at various fluorine ratios has been carried out. Calcination led to the decrease of the specific surface area by particles coalescence. Superficial diffusion and gaseous phase trans...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Solid state ionics 1997-11, Vol.101, p.1357-1362
Hauptverfasser: Senamaud, N., Bernache-Assollant, D., Champion, E., Heughebaert, M., Rey, C.
Format: Artikel
Sprache:eng
Schlagworte:
Fluorapatite
Hydroxyapatite
Sintering
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:A comparative study of calcination and sintering of hydroxyfluorapatite powders Ca 10(PO 4) 6(OH) x F 2− x substituted at various fluorine ratios has been carried out. Calcination led to the decrease of the specific surface area by particles coalescence. Superficial diffusion and gaseous phase transport appear as the main mechanisms of surface reduction. For densification a minimum was reached for x = 1 which corresponds to the minimum of FAP-HAP mixing enthalpy. Sintering is limited by the diffusion of hydroxide and fluorine ions.
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(97)00242-7