Hydrothermally-grown monetite (CaHPO 4) on hydroxyapatite

Using sintered hydroxyapatite as substrate and reagent grade CaO, P 2O 5 and deionized water as raw materials for hydrothermal reaction, monetite (CaHPO 4) could be deposited on the surface of hydroxyapatite under an autogeneous pressure of 1.55–8.59 MPa at 200–300 °C. The deposition rate of monetit...

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Bibliographic Details
Published in:Ceramics international 1998, Vol.24 (4), p.249-254
Main Authors: Hsu, Yao-Shan, Chang, Edward, Liu, Hok-Shin
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
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Summary:Using sintered hydroxyapatite as substrate and reagent grade CaO, P 2O 5 and deionized water as raw materials for hydrothermal reaction, monetite (CaHPO 4) could be deposited on the surface of hydroxyapatite under an autogeneous pressure of 1.55–8.59 MPa at 200–300 °C. The deposition rate of monetite increased with temperature and time of the reaction. Under 8.59 MPa at 300 °C. small needle-like crystals of monetite were present after 8 h. After 72 h, the diameter and length of the needle-like crystals became larger and the clusters of crystals were more pronounced. After growing for 120 h at 300 °C, the crystal morphology changed and the needle-like crystals coalesced into granular grains.
ISSN:0272-8842
1873-3956
DOI:10.1016/S0272-8842(96)00056-9