Synthesis and dissolution behavior of β-TCP and HA/β-TCP composite powders

Calcium phosphate powders, β-TCP and biphasic HA/β-TCP, were synthesized by calcining the powders obtained from the co-precipitation method using Ca(NO 3) 2·4H 2O and (NH 4) 2HPO 4. The effects of the initial Ca/P ratio and pH of the solution on the phase evolution and in vitro dissolution behavior...

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Veröffentlicht in:Journal of the European Ceramic Society 2003-06, Vol.23 (7), p.1039-1045
Hauptverfasser: Kwon, Soon-Ho, Jun, Youn-Ki, Hong, Seong-Hyeon, Kim, Hyoun-Ee
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Sprache:eng
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Zusammenfassung:Calcium phosphate powders, β-TCP and biphasic HA/β-TCP, were synthesized by calcining the powders obtained from the co-precipitation method using Ca(NO 3) 2·4H 2O and (NH 4) 2HPO 4. The effects of the initial Ca/P ratio and pH of the solution on the phase evolution and in vitro dissolution behavior of the powders in a Ringer's solution were investigated. The Ca/P ratio of the resulting powders was strongly dependent on the pH of the solution and weakly dependent on the initial Ca/P ratio. Single phase TCP powder was obtained at pH=7.4 and the initial Ca/P ratio had a little effect on the resulting Ca/P ratio. Biphasic composite powders were prepared at pH=8.0 and the Ca/P ratio of resulting powder was controllable by adjusting the initial Ca/P ratio. TCP powder showed the highest dissolution rate in the Ringer's solution and biphasic composite powder exhibited an intermediate dissolution behavior between that of HA and TCP.
ISSN:0955-2219
1873-619X
DOI:10.1016/S0955-2219(02)00263-7