Theoretical Calculation of the Possibility and Conditions of Formation of a Mixture of Calcium Phosphates

A theoretical calculation was conducted to determine the potential for and the conditions under which mineral phases may form. It has been established that under these conditions the formation of a mixture of calcium phosphates is possible, with hydroxyapatite being the most stable phase. Based on the calculated data, a synthesis was carried out, as a result of which it was established that the resulting sediments were represented by the phases of hydroxyapatite, octacalcium phosphate and brushite. It was found that the synthesized mixture of calcium phosphates can be used to create dense ceramics. Thus, the range of use of synthesized materials is expanding. It has been proven that in an SBF solution a calcium phosphate layer is formed on the surface of the samples, which indicates the bioactivity of the samples. The prospect for further development of the topic is the use of ceramics as materials for replacing bone defects or a biologically active layer on the surface of implants.