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Microwave accelerated synthesis of nanosized calcium deficient hydroxyapatite
A. Siddharthan, , Suresh Krishnamoorthy Seshadri
Published in Springer
2004
PMID: 15747179
Volume: 15
   
Issue: 12
Pages: 1279 - 1284
Abstract
Rapid synthesis of calcium deficient hydroxyapatite (CDHA, Ca 10-x(HPO4)x(PO4)6-x(OH) 2-x) with Ca/P ratio 1.5 was done by precipitation using calcium nitrate tetra-hydrate and phosphoric acid and subsequently subjecting to microwave irradiation in a domestic microwave oven for 15 min. Transmission electron microscopy analysis shows needle like morphology of CDHA having length 16-39 nm and width 7-16 nm. The synthesized CDHA has the characteristic HPO 2- 4 vibration band at 875 cm-1 in Fourier transform infrared (FT-IR) spectra. The X-ray powder diffraction (XRD) analysis shows a pattern corresponding to stoichiometric hydroxyapatite (HA) with broad peaks suggesting that CDHA particles were nanosized. Fourier transform Raman spectroscopy (FT-Raman) do not indicate any fluorescence band that is characteristic of non-stoichiometric HA. The thermal decomposition of CDHA to beta tricalcium phosphate (β-TCP) was also studied for the additional confirmation. The nanosized CDHA was found to be stable up to 600°C. © 2004 Kluwer Academic Publishers.
About the journal
JournalData powered by TypesetJournal of Materials Science: Materials in Medicine
PublisherData powered by TypesetSpringer
ISSN09574530
Open AccessNo
Concepts (36)
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    Calcium compounds
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    Fourier transform infrared spectroscopy
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    MICROWAVES
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    Nanostructured materials
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    Phosphoric acid
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    Precipitation (chemical)
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    Transmission electron microscopy
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    X ray powder diffraction
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    CALCIUM DEFICIENT HYDROXYAPATITE (CDHA)
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    CALCIUM NITRATE TETRA-HYDRATE
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    Fluorescence band
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    Microwave irradiation
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    Hydroxyapatite
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    Calcium derivative
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    Calcium phosphate
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    Nanoparticle
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    NITRIC ACID DERIVATIVE
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    Article
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    Decomposition
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    Infrared spectroscopy
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    Microwave radiation
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    Particle size
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    Precipitation
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    Priority journal
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    Raman spectrometry
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    Stoichiometry
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    Synthesis
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    Temperature dependence
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    Thermal analysis
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    Vibration
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    Calcium
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    Durapatite
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    Microscopy, electron, transmission
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    Nanotechnology
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    Spectroscopy, fourier transform infrared
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    X-ray diffraction