| Autor: |
Glazov, I. E., Krut'ko, V. K., Musskaya, O. N., Kulak, A. I. |
| Zdroj: |
Russian Journal of Inorganic Chemistry; Nov2022, Vol. 67 Issue 11, p1718-1730, 13p |
| Abstrakt: |
Biphasic calcium carbonate phosphates comprised of amorphous calcium carbonate phosphate and carbonated hydroxyapatite were synthesized by wet precipitation at pH 9, Ca/P = 1.67, and concentrations of 0.60–0.90 mol/L under varying precipitation conditions. The wet formation of biphasic calcium carbonate phosphates includes a partial conversion of the amorphous phase into a mixture of carbonated hydroxyapatite and calcite, followed by leaching of calcite and constitutional Ca2+ and ions during long-term decantation. The identification of biphasic calcium carbonate phosphates involves complex analysis using a spectroscopic method to elucidate carbonate substitution schemes, an X-ray diffraction method to determine the degree of apatite amorphization, and thermoanalytical methods to detect the effects of crystallization of the amorphous phase. Variations in the preparation parameters provide a means for controlling the contents of both amorphous calcium carbonate phosphate and constitutional ions in biphasic calcium carbonate phosphates, which amounts determine their resorbability and thermal stability. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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