METHOD OF OBTAINING SILICON-MODIFIED HYDROXYAPATITE WITH APPLICATION OF SHF-RADIATION Russian patent published in 2014 - IPC C01B25/32 H05B6/64 C01B33/00 

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining biologically active silicon-modified hydroxyapatite powder with application of SHF-radiation. Method includes preparation and mixing water solutions of calcium nitrate, ammonium hydrophosphate and ammonia and tetraethoxysilane solution in ethanol with further exposure to SHF-radiation, precipitation, drying at temperature 90°C for 3 hours and calcinations at 800°C for 1 hour. Additional SHF-processing is performed after mixture precipitation. SHF-heating is carried out for 25-30 minutes, with power 120 W. Ratio of component is the following, wt %: calcium nitrate - 5.5, ammonium hydrophosphate - 1.66, tetraethoxysilane - 0.27, ethanol - 0.27, ammonia - in amount , required for supporting mixture pH at the level 10-11, water - the remaining part.

EFFECT: reduction of average calculated crystallite size and dispersion, which in its turn has positive effect on powder solubility.

4 dwg, 1 tbl, 1 ex