TITLE

Phase development and sintering behaviour of biphasic HA-TCP calcium phosphate materials prepared from hydroxyapatite and bioactive glass

AUTHOR(S)
Behnamghader, A.; Bagheri, N.; Raissi, B.; Moztarzadeh, F.
PUB. DATE
January 2008
SOURCE
Journal of Materials Science: Materials in Medicine;Jan2008, Vol. 19 Issue 1, p197
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The composites of hydroxyapatite (HA) with 2.5 and 5 wt% of a double oxide (50 mol% CaO and 50 mol% P2O5) glass were prepared using the conventional powder mixing and sintering method. The addition of the glass significantly enhanced the decomposition process of HA into alpha tricalcium phosphate (α-TCP) for bodies sintered at 1,300 and 1,350 °C and β-TCP phases for the ones sintered at 1,200, 1,250 and 1,300 °C. Microstructural characteristics, phase development and thermal behaviour were studied by SEM, XRD and STA. The effects of TCP phase content and phase transformation from β-TCP to α-TCP on the sintering are discussed. The characterizations revealed considerable content of TCP in the form of large semi-islands due to important reactions between the fine HA and the glass mixed powders.
ACCESSION #
28328913

 

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