METHOD FOR PREPARING SUBMICRON BIPHASIC TRICALCIUM PHOSPHATE AND HYDROXYAPATITE CERAMICS Russian patent published in 2015 - IPC C04B35/447 C01B25/32 B82Y5/00 

FIELD: medicine.

SUBSTANCE: what is presented is a method for preparing submicron biphasic tricalcium phosphate and hydroxyapatite ceramics involving synthesis of single-phase powder of calcium salts and ammonium hydrophosphate, disaggregation, moulding and annealing. According to the invention, the calcium salt is presented by calcium acetate in the form of an aqueous solution of the concentration of 1M - 2M in Ca/P ratio applicable for initial salts and falling within the range of 1.5-1.6. The synthesis procedure involves single-step pouring of an aqueous solution of ammonium hydrophosphate to the aqueous solution of calcium acetate and mixing of the above solutions for 10-20 minutes, and separating the precipitate. The products are annealed at a temperature falling within the range of 1,050-1,150°C and kept at the above temperature for 0.5-1.5 hours. The produced ceramics contains β-tricalcium phosphate and hydroxyapatite with a grain size of 400-600 nm.

EFFECT: preparing the submicron biphasic ceramics having a uniform microsctructure.

2 dwg, 1 tbl, 1 ex