ИСТИНА

Powder mixtures of hydroxyapatite Сa10(РО4)6(ОН)2 and potassium hydrosulfate КНSO4 were investigated to confirm possibility of creating ceramic composites with biocompatible and bioresorbable phases of tricalcium phosphate Сa3(РО4)2, potassium rhenanite KCaPO4, potassium-substituted tricalcium phosphate Ca10K(PO4)7 and calcium sulfate anhydrite СаSO4. Powder mixtures of calcium hydroxyapatite Са10(РО4)6(ОН)2 and potassium hydrosulfate КНSO4 were homogenized in acetone medium in planetary mill. XRD analysis was carried out for ceramic samples made of these powder mixtures after firing at temperature range of 700-900oC. The following phases were found in samples after firing in interval of 700-900oC: potassium calcium phosphate Ca10K(PO4)7 and calcium langbeinite (potassium calcium double sulfate) K2Ca2(SO4)3 for КНSO4/Са10(РО4)6(ОН)2 established as 2/1 and potassium calcium phosphate Ca10K(PO4)7, calcium langbeinite (potassium calcium double sulfate) K2Ca2(SO4)3, potassium sulfate K2SO4 and calcium sulfate for КНSO4/Са10(РО4)6(ОН)2 established as 6/1. The results of present investigation can be taken into account when creating a resorbable ceramic materials in the K2O-CaO-SO3-P2O5 system for bone defect treating. Acknowledgements: The financial support of RFBR project # 20-03-00550.