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Funct. Mater. 2018; 25 (2): 358-363.

doi:https://doi.org/10.15407/fm25.02.358

Functional materials for medical and biological purposes on he system CaO-CaF2-P2O5-H2O and additives

S.Krivileva, V.Moiseev

National Technical University Kharkiv Polytechnic Institute, 2 Kyrpichova Str., 61000 Kharkiv, Ukraine

Abstract: 

The system of CaO-P2O5 has been studied, he polymorphism of Ca3(PO4)2 has been verified, he position of binary eutectics and the melting points in them on he Ca3(PO4)2-Ca4P2O9 segment have been determined. A diagram of the state of the CaO-P2O5 system is constructed. The experimental verification of the calculated data by the high-temperature microscopy method in sity is performed. The regions of primary crystallization of phases in the system Ca3(PO4)2-CaCO3-Ca(OH)2-H2O are refined. The subsolidus structure of the systems CaO-CaF2-P2O5-H2O and CaO-MgO-CaF2-P2O5 has been studied. The areas promising for the synthesis of materials based on CaO-P2O5-CaF2-H2O system and additives for the reconstruction of structural defects of the skeleton are established.

Keywords: 
phase diagram, the CaO-P<sub>2</sub>O<sub>5</sub> system, polymorphism, high-temperature microscopy, elementary tetrahedras, correction of skeletal disorders.
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