Details

Autor(en) / Beteiligte

• Kozlovskiy, A.
• Borgekov, D.B.
• Shlimas, D.I.
• Zdorovets, М.V.

Titel

Study of the efficiency of increasing the Bi2O3 concentration on the optical, radiation shielding and strength characteristics of 0.5TeO2-(0.5-x)WO3-xBi2O3 glasses

Ist Teil von

• Optical materials, 2021-10, Vol.120, p.111494, Article 111494

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The work is devoted to the study of the effect of changes in the concentration of Bi2O3 in the structure of 0.5TeO2-(0.5-x)WO3-xBi2O3 telluride glasses on the optical, radiation shielding and strength characteristics. A mechanochemical method with subsequent sintering at a temperature of 1000 °C was chosen as a method for obtaining glasses. This method of producing glasses allows obtaining amorphous-like glasses with high strength values. During the determination of strength properties, it was found that an increase in the Bi2O3 concentration leads to an increase in strength by 30–50% at concentrations x = 0.2–0.25. During measurements of optical properties, it was found that an increase in the Bi2O3 concentration leads to a change in the transmission value, as well as a shift in the fundamental absorption edge. During tests to determine the radiation shielding efficiency of the synthesized glasses, it was found that an increase in the Bi2O3 concentration leads to an increase in the radiation shielding characteristics by a factor of 1.5–2 when absorbing gamma quanta with energies of 660–1270 keV, and in the case of low-energy gamma quanta, their almost complete absorption. •Changes in density and porosity depending on the concentration of Bi2O3 dopant.•The optical properties of glasses, band gap and refractive index were determined using the UV–Vis spectroscopy method.•TWBO-4 and TWBO-5 samples the shielding efficiency is more than 93% that demonstrates that practically all gamma quanta are absorbed in these glasses.•The shielding efficiency greater than 50% for TWBO-4 and TWBO-5 samples in the case of shielding of gamma quanta with an energy of 1270 keV.