Chemical preparation of carbonated calcium hydroxyapatite powders at 37 degrees C in urea-containing synthetic body fluids

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1999-01-01

Author

Bayraktar, D
Tas, AC

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An important inorganic phase of synthetic bone applications, calcium hydroxyapatite (HA, Ca-10(PO4)(6)(OH)(2)), was prepared as a single-phase ceramic powder. Carbonated HA powders were formed from calcium nitrate tetrahydrate and diammonium hydrogen phosphate salts dissolved in aqueous 'synthetic body fluid' (SBF) solutions, containing urea (H2NCONH2), at 37 degrees C and pH of 7.4, by using a novel chemical precipitation technique. These powders were also found to contain trace amounts of Na and Mg impurities in them, originated from the use of SBF solutions, instead of pure water, during their synthesis. The characterization and chemical analysis of the synthesized powders were performed by powder X-ray diffraction (XRD), Fourier-transformed infra-red spectroscopy (FT-IR), and inductively-coupled plasma atomic emission spectroscopy (ICP-AES).

Subject Keywords

Apatite, X-ray methods, Powders-chemical preparation, Calcium hydroxyapatite

URI

https://hdl.handle.net/11511/64542

Journal

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

DOI

https://doi.org/10.1016/s0955-2219(99)00132-6

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Department of Metallurgical and Materials Engineering, Article

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Biomimetic preparation of HA precursors at 37 degrees C in urea- and enzyme urease-containing synthetic body fluids Bayraktar, D; Tas, AC (1999-12-01) An important inorganic phase of synthetic bone applications, calcium hydroxyapatite (HA, Ca-10(PO4)(6)(OH)(2)), was prepared as a single-phase and sub-micron bioceramic powder. Carbonated HA precursors were synthesized from calcium nitrate tetrahydrate and diammonium hydrogen phosphate salts dissolved in "synthetic body fluid" (SBF) solutions, containing urea (H2NCONH2) and enzyme urease, under the biomimetic conditions of 37 degrees C and pH 7.4, by using a novel chemical precipitation technique.
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Fabrication and characterization of porous hydroxyapatite and biphasic calcium phosphate ceramic as bone substitutes Koc, N; Timucin, M; Korkusuz, Feza (2004-01-01) In the present study, the calcium phosphate powders (HAP, HAP-TCP) were produced by a precipitation technique involving the use of aqueous solutions of calcium nitrate and diammonium hydrogen phosphate. Preforms of calcium phosphate ceramics were produced by using a modified slip casting technique. Porosity in the cast and in the sintered ceramic was obtained through custom made PMMA beads similar to200-300 mum size. The green ceramic samples were prepared by suspending the apatite powder and PMMA beads in ...

Citation Formats

D. Bayraktar and A. Tas, “Chemical preparation of carbonated calcium hydroxyapatite powders at 37 degrees C in urea-containing synthetic body fluids,” JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, pp. 2573–2579, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64542.