Abstract
Powders of magnesium-modified as well as zinc-modified calcium phosphates (Me-β-TCP and HA) with a (Ca2++Mg2++Zn2++Na++K+)/P ratio of 1.3–1.4 and various Me2+/(Me2++Ca2+) ratios (from 0.005 to 0.16) were prepared in biomimetic electrolyte systems at pH 8, mother liquid maturation and further syntering at 600–1000°C. Some differences in zinc and magnesium modifications have been prognosed on the basis of thermodynamic modeling of the studied systems and explained by the Mg2+ and Zn2+ ion chemical behaviour. The temperature as well as the degree of Zn2+ and Mg2+ ions substitutions were found to stabilize the β-TCP structure and this effect was more prononced for zinc. Thus, zinc-modified β-TCP powders consisting of idiomorphic crystals were obtained through sintering of Zn2+ ion substituted calcium phosphates precursors at 800–1000°C. The Mg2+ ion substitution leads to obtaining magnesium-modified β-TCP with spherical grains.
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This work is financially supported by the Bulgarian Ministry of Education, Youth and Science under Projects DTK 02-70/2009 and DCVP-02/2/2009.
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Rabadjieva, D., Tepavitcharova, S., Gergulova, R. et al. Mg- and Zn-modified calcium phosphates prepared by biomimetic precipitation and subsequent treatment at high temperature. J Mater Sci: Mater Med 22, 2187 (2011). https://doi.org/10.1007/s10856-011-4415-3
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DOI: https://doi.org/10.1007/s10856-011-4415-3