Ultrasonic Attenuation at Low Temperature of TeO2–V2O5 Glasses

Abstract

Investigations are reported on the dependence of longitudinal ultrasonic attenuation on temperature in tellurite glasses containing vanadium pentoxide with different concentrations. The pulse echo technique was applied at ultrasonic frequencies 2, 4, 6, and 8 MHz, in the temperature range between 100 and 300 K. The results showed well‐defined peak whose position shifts towards higher temperature with increasing frequency. The mean activation energy is strongly composition sensitive. The position and overall shape of the loss peaks in dependence on composition were analysed in terms of an assumed loss of standard linear solid type with low dispersion, and a broad distribution of Arrhenius‐type relaxation with temperature independent relaxation strength. The dependence of ultrasonic attenuation on temperature has been interpreted in terms of a thermally activated relaxation process which arises when ultrasonic waves disturb the equilibrium of an atom moving in a double‐well potential in the glass network. The dependence of activation energy on composition suggests that the structure of these glasses changes at 20 mol% V2O5 concentration.

Técnicas de ultrasonido para la caracterización de vidrios volcánicos

“…El método ultrasónico de pulso eco se ha utilizado con éxito para estudiar la influencia de la composición química sobre las constantes elásticas dinámicas en vidrio industrial (cuya composición es similar a la obsidiana) observándose buena correlación entre dichas variables (Kilinc, 2016). Por otro lado, el estudio de la atenuación ultrasónica en vidrio ha mostrado picos de absorción cuyas características y posición dependen de la composición del vidrio y la frecuencia de la onda aplicada (Sidkey et al, 1997).…”

Ultrasonic waves, mechanical properties and radiation shielding competence of Er3+ doped lead borate glasses: experimental and theoretical investigations

“…Moreover, a comparison of the present elastic moduli of other glasses would be beneficial [51][52][53][54].…”

Infrared transmission of chalcohalide glasses in the Ge–Se–Te–I system

“…This means that, the size of scattering centers, hexagonal Te, increases as the annealing temperature increases which intern affect the obtained IR transmission spectra of worked glass. Tellurite glasses are very attractive glasses due to its unique properties [20][21][22][23][24][25][26][27][28].…”