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Effect of Ca/P ratio and milling material on the mechanochemical preparation of hydroxyapaptite

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Abstract

The mechanochemical transformation of Ca(OH)2–(NH4)2HPO4 with different Ca/P ratios 1; 1.5; 1.67 and 1.75 was carried out for different periods of time from 10 min to 24 h in a horizontal vibration mill using steel and agate vials and balls. The phase transformations obtained at each milling stage were characterized by X-ray diffraction, infrared spectroscopy and transmission electron microscopy. Complete transformation to hydroxyapatite took place during the first 5 h of milling, for Ca/P ratios 1.5 to 1.7, when milling was carried out with steel vials and balls. The contamination was not significant for the periods of milling studied for both milling media.

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Acknowledgements

The authors gratefully acknowledge the FONACIT projects No. LAB-1998003690 and G-2001000900 for financial support.

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Authors and Affiliations

  1. Centro de Química, Instituto Venezolano de Investigaciones Científicas, IVIC, Apdo. Postal 21827, Caracas, 1020, Venezuela

    Janeth Salas, Zully Benzo, Eunice Marcano & Clara Gómez

  2. Laboratorio de Ciencia e Ingeniería de Materiales, Departamento de Ingeniería, Instituto Venezolano de Investigaciones Científicas, IVIC, Apto 21827, Caracas, 1020, Venezuela

    Gema Gonzalez

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  1. Janeth Salas
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  2. Zully Benzo
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  3. Gema Gonzalez
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  5. Clara Gómez
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Correspondence to Zully Benzo.

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Salas, J., Benzo, Z., Gonzalez, G. et al. Effect of Ca/P ratio and milling material on the mechanochemical preparation of hydroxyapaptite. J Mater Sci: Mater Med 20, 2249–2257 (2009). https://doi.org/10.1007/s10856-009-3804-3

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  • DOI: https://doi.org/10.1007/s10856-009-3804-3

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