Microwave accelerated synthesis of nanosized calcium deficient hydroxyapatite

2020-02-15 00:59:44

Fourier Transform calcium microwave CDHA

责任者: Siddharthan, A.;Seshadri, S.K.;Sampath Kumar, T.S. 单位: Dept. of Metall. & Mater. Eng., Indian Inst. of Technol., Chennai, India 来源出处: Journal of Materials Science: Materials in Medicine(J. Mater. Sci., Mater. Med. (USA)),2004/12/,15(12):1279-84 摘要: Rapid synthesis of calcium deficient hydroxyapatite (CDHA, Ca10-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 HPO42- 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 nonstoichiometric 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 关键词: bioceramics;calcium compounds;Fourier transform spectra;infrared spectra;precipitation;pyrolysis;Raman spectroscopy;stoichiometry;transmission electron microscopy;X-ray diffraction;microwave accelerated synthesis;nanosized calcium deficient hydroxyapatite;precipitation;calcium nitrate tetra-hydrate;phosphoric acid;microwave irradiation;domestic microwave;transmission electron microscopy analysis;vibration band;Fourier transform infrared spectra;X-ray powder diffraction;XRD;stoichiometry;Fourier transform Raman spectroscopy;fluorescence band;thermal decomposition;15 min;7 to 39 nm;600 C;Ca3(PO4)2