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Abstract <p>Calcium phosphate cements (Se-CPC) containing Se(IV) in an amount of 0.08, 0.15, and 0.18 wt % were obtained by mixing selenium-containing tricalcium phosphate (Se-TCP) powder and a sealing liquid (SL) based on an aqueous solution of magnesium dihydrogen orthophosphate. The synthesis of Se-TCP powders was carried out by precipitation from solutions using sodium selenite as a selenium source. Experimental samples were studied by X-ray diffraction analysis (XRD), infrared spectroscopy (IR spectroscopy), and X-ray fluorescence elemental analysis (XFEA). The setting parameters of the cement system were assessed, including the study of compressive strength and the microstructure of the fracture surface of the samples. The optimum SL/CP ratio of 0.9/1 was determined, at which the net hardening time of Se-CPC was from 280 to 360 s in a series of compositions. It was revealed that an increase in the concentration of selenium leads to an increase in the content of the brushite phase in the composition of Se-CPC, an increase in the size of its needle-shaped morphology particles, and a uniform coating of TCP particles. However, crystallization of the brushite phase along the boundaries of TCP particles leads to weakening of the material, which is reflected in a decrease in the compressive strength of cements from 7.5 to 5.6 MPa.</p>

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Selenium-Containing Calcium Phosphate Cements

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • A. A. Egorov,
  • N. V. Petrakova,
  • Yu. O. Nikitina,
  • A. Yu. Demina,
  • A. A. Ashmarin,
  • A. S. Fomin,
  • A. I. Ogarkov,
  • S. M. Barinov,
  • B. S. Komlev

摘要

Abstract

Calcium phosphate cements (Se-CPC) containing Se(IV) in an amount of 0.08, 0.15, and 0.18 wt % were obtained by mixing selenium-containing tricalcium phosphate (Se-TCP) powder and a sealing liquid (SL) based on an aqueous solution of magnesium dihydrogen orthophosphate. The synthesis of Se-TCP powders was carried out by precipitation from solutions using sodium selenite as a selenium source. Experimental samples were studied by X-ray diffraction analysis (XRD), infrared spectroscopy (IR spectroscopy), and X-ray fluorescence elemental analysis (XFEA). The setting parameters of the cement system were assessed, including the study of compressive strength and the microstructure of the fracture surface of the samples. The optimum SL/CP ratio of 0.9/1 was determined, at which the net hardening time of Se-CPC was from 280 to 360 s in a series of compositions. It was revealed that an increase in the concentration of selenium leads to an increase in the content of the brushite phase in the composition of Se-CPC, an increase in the size of its needle-shaped morphology particles, and a uniform coating of TCP particles. However, crystallization of the brushite phase along the boundaries of TCP particles leads to weakening of the material, which is reflected in a decrease in the compressive strength of cements from 7.5 to 5.6 MPa.