СИНТЕЗ ТА ХАРАКТЕРИЗАЦІЯ КОМПОЗИТІВ НА ОСНОВІ МОДИФІКОВАНИХ ГІДРОКСИАПАТИТІВ З ZrO2

The aim of this work was to develop a one-stage method for synthesizing compositesbased on modified with sodium and magnesium cations and carbonate anions of apatite-typecalcium phosphates and varying ZrO₂ content (5, 10, and 25 wt%). The samples were synthesizedfrom aqueous solutions of the Ca²⁺-Mg²⁺-Na⁺-NH₄⁺-PO₄³⁻-CO₃²⁻-NO₃⁻ system with theaddition of zirconyl nitrate and subsequently calcined at 600°C. XRD analysis of the powdersconfirmed the formation of apatite-type calcium phosphates (hexagonal system, space groupP6₃/m) and ZrO₂. The presence of carbonate anions in the structure was verified using FTIR-spectroscopy. The study of the effect of synthesized composites containing 10 or 25 wt% ZrO₂ onthe pH values of a model solution revealed their activity, leading to an increase in pH during thefirst three days. This effect was slightly more pronounced for composites with a higher content ofthe active phosphate component. The obtained results may be useful in the development ofbioactive materials for orthopedics.