Study of the effect of doping CeO2 in TeO2–MoO–Bi2O3 ceramics on the phase composition, optical properties and shielding efficiency of gamma radiation
Temir A. Zhumadilov K.S. Zdorovets М.V. Kozlovskiy A. Trukhanov A.V.
May 2021Elsevier B.V.
Optical Materials
2021#115
This paper presents data on the study of changes in the structural, optical, and gamma radiation shielding characteristics of TeO2–MoO–Bi2O3 ceramics doped with СеО2. Doping was carried out by adding CeO2 powder to the composition of ceramics during mixing in the following molar proportions of 0.05, 0.10, 0.15, 0.20, and 0.25 mol %. Using the method of X-ray phase analysis, the dynamics of phase transitions was established: Bi6Te2O13/Bi4MoO9 → Bi4MoO9/CeTe2O6. It was found that an increase in the concentration of the dopant leads to a change in the content of the phases, followed by the equilibration of the Bi4MoO9 and CeTe2O6 phases at a dopant concentration of 0.20 and the dominance of the CeTe2O6 phase at a concentration of 0.25. During the determination of optical characteristics, it was found that doping leads to sharp change in the fundamental absorption edge and a decrease in the Eg value from 2.27 eV to 1.87 eV, as well as the appearance of two absorption bands with energies of 1.72 eV and 2.39 eV. During the determination of gamma radiation shielding characteristics, it was found that an increase in the concentration of CeO2 leads to an increase in gamma radiation shielding efficiency exceeding 50% for dopant concentrations above 0.15 M in the composition of ceramics.
Gamma radiation , Optical properties , Protective materials , Radiation resistant materials , Tellurium oxide
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The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
L.N. Gumilyov Eurasian National University, Nur-Sultan, 010008, Kazakhstan
Department of Intelligent Information Technologies, Ural Federal University, Yekaterinburg, 620075, Russian Federation
Research School of Chemistry & Applied Biomedical Sciences National Research Tomsk Polytechnic University 30, Lenin ave., Tomsk, 634050, Russian Federation
Laboratory of Magnetic Films Physics, Scientific-Practical Materials Research Centre of National Academy of Sciences of Belarus, Minsk, 220072, Belarus
Laboratory of Single Crystal Growth, South Ural State University, Chelyabinsk, 454080, Russian Federation
The Institute of Nuclear Physics
L.N. Gumilyov Eurasian National University
Department of Intelligent Information Technologies
Research School of Chemistry & Applied Biomedical Sciences National Research Tomsk Polytechnic University 30
Laboratory of Magnetic Films Physics
Laboratory of Single Crystal Growth
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