Obtainment of α-Tricalcium Phosphate by Solution Combustion Synthesis Method Using Urea as Combustible
The aim of this work is the synthesis of α-tricalcium phosphate by solution combustion synthesis using urea as combustible in the stoichiometric ratio and with excess of combustible. The salts Ca(O3)2.4H2O and (H4)2HPO4 were used as reaction precursors with Ca/P ratio of 1.5. The pH adjustment was made adding nitric acid. A porous foam composed by β-tricalcium phosphate, hydroxyapatite and α or β-dicalcium pyrophosphate were obtained as reaction product. X-ray diffraction was used to identify the phases. The obtainment of α-TCP was possible after a heat treatment where the material was held at 1250°C for 15 hours followed by quenching. Smaller particle size was obtained when four times the stoichiometric ratio of combustible was used in the reaction. α-TCP samples were immersed in SBF in order to verify the biocompatibility.
Marcelo Prado and Cecília Zavaglia
T. M. Volkmer et al., "Obtainment of α-Tricalcium Phosphate by Solution Combustion Synthesis Method Using Urea as Combustible", Key Engineering Materials, Vols. 396-398, pp. 591-594, 2009