Synthesis of silicated hydroxyapatite Ca{sub 10}(PO{sub 4}){sub 6-x}(SiO{sub 4}){sub x}(OH){sub 2-x}

Journal Article · Fri Aug 15 04:00:00 EDT 2008 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2008.04.027· OSTI ID:21128397

Palard, Mickael ^[1]; Champion, Eric ^[1]; Foucaud, Sylvie ^[1]

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1. SPCTS, Universite de Limoges, CNRS, Faculte des Sciences et Techniques, 123 Avenue Albert Thomas, 87060 Limoges Cedex (France)

The preparation of silicated hydroxyapatite Ca{sub 10}(PO{sub 4}){sub 6-x}(SiO{sub 4}){sub x}(OH){sub 2-x} (SiHA) with 0{<=}x{<=}2 was investigated using a wet precipitation method followed by a heat treatment. X-ray diffraction and Rietveld refinement, Fourier transformed IR (FTIR) spectroscopy, elemental analyses, transmission electron microscopy and thermal analyses were used to characterize the samples. The raw materials were composed of a partially silicated and carbonated apatite and a secondary minor phase containing the excess silicon. Single phase silicated hydroxyapatites, with 0{<=}x{<=}1, could be synthesized after a thermal treatment of the raw powders above 700 deg. C. The presence of carbonate groups in the raw apatite played an important role in the incorporation of silicates during heating. From the different results, the mechanisms of formation of SiHA are discussed. - Graphical abstract: The preparation of pure silicated hydroxyapatite Ca{sub 10}(PO{sub 4}){sub 6-x}(SiO{sub 4}){sub x}(OH){sub 2-x} powders with controlled silicon content was investigated. The synthesis route included a precipitation in aqueous media. It required an additional high temperature solid-state reaction to fully incorporate the silicon into the apatite crystals.

• OSTI ID: 21128397
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 8 Vol. 181; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
APATITES
CALCIUM PHOSPHATES
CARBONATES
CRYSTALS
HEAT TREATMENTS
HEATING
INFRARED SPECTRA
PRECIPITATION
RAW MATERIALS
SILICATES
SILICON
SPECTROSCOPY
SYNTHESIS
TEMPERATURE RANGE 1000-4000 K
THERMAL ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION