ИСТИНА

The aim of our research activity was to obtain resorbable bioceramic in Са3(РО4)2-Mg2P2O7 system, based on synthetic powders of calcium and magnesium phosphates. The selection of various calcium and magnesium salts as initial ingredients allowed us to control a predetermined pH level in the reaction zone. Fine calcium and magnesium phosphate powders were synthesized by means of wet precipitation from aqueous solutions of ammonium hydrogenphosphate and calcium and magnesium nitrates/ acetate/ saccharates. The phase composition of synthetic powders was presented with the calcium and magnesium phosphates, i.e. HA - Ca10(PO4)6(OH)2, struvite - MgNН4РО4(Н2О)6, or a mixture of HA and struvite. The content of struvite increased with increasing magnesium content of the initial solution. Samples molded from synthetic powder were fired with a heating rate of 5 °С/min, holding for 2 hours at a final temperature in the range 900–1200 °С. According to XRD analysis the phase composition of ceramic materials, was consisted of tricalcium phosphate, magnesium pyrophosphate, solid solutions of calcium/magnesium orthophosphate and calcium/magnesium pyrophosphate. The obtained ceramic materials can be used for regeneration of damaged bone tissue.