Synthesis and properties of Sr-containing trycalcium phosphate
Omsk State University named after F.M. Dostoevsky
Abstract: Sr -substituted tricalcium phosphate was obtained by precipitation from aqueous solutions. Synthetic solid phases were investigated using X-ray phase analysis, IR spectroscopy, scanning electron microscopy, energy dispersive analysis. The supernatant was examined for the presence of Ca2+ and PO43- ions to calculate the Ca/ P ratio. It was revealed that strontium ions are part of tricalcium phosphate, but do not change its phase composition. The addition of strontium ions to the initial solution contributes to a decrease in the size of crystallites and an increase in their porosity. When studying the bioresorbability of the obtained samples using direct potentiometry, it was found that the samples containing strontium ions in their composition have a lower value of the rate of resorption. Energy dispersive analysis data confirmed that strontium ions are included in the composition of TCP samples. But with an increase in their concentration, complete replacement of calcium ions with strontium ions in the TCP structure does not occur. At the same time, the highest values of the dissolution rate are recorded in acidic media.
Keywords: crystallization, calcium phosphates, substituted tricalcium phosphate, strontium, bioresorbability
- Olga A. Golovanova – Dr. Sc., Professor, Head of the Department of Inorganic Chemistry, Omsk State University named after F.M. Dostoevsky
Golovanova, O.A. Synthesis and properties of Sr-containing trycalcium phosphate / O.A. Golovanova // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2021. — I. 13. — P. 829-840. DOI: 10.26456/pcascnn/2021.13.829. (In Russian).
Full article (in Russian): download PDF file
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