TY - EJOUR
AU - El‑Mallawany, Raouf
AU - Yousef, Samir A.
AU - El-Shaer, Abdelhamid
AU - Elabd, Hanan A.
PY - 2023
DA - November
TI - Elastic moduli of some rare-earth doped tellurite glasses
T2 - Journal of Theoretical and Applied Physics
VL - 17
L1 - https://oiccpress.com/journal-of-theoretical-and-applied-physics/article/elastic-moduli-of-some-rare-earth-doped-tellurite-glasses/
DO - 10.57647/j.jtap.2023.1705.47
N2 - Samarium oxide (Sm2O3) and ytterbium oxide (Yb2O3) doped tungsten-tellurite glasses (TWSm), (TWYb) in the forms of 80 (TeO2) - (20-x) (WO3) - x (Sm2O3) and 80 (TeO2) - (20-x) (WO3) - x (Yb2O3) with x = 0, 1.0, 2.0, 3.0, 4.0 and 5.0 mol% were prepared by the melt-quenching technique. The XRD analysis for the two prepared glass systems verified the samples’ amorphous nature. The glass density ( ρ ) was measured by the Archimedes method. Both ( ρ ) and the molar volume (VM) of the two prepared systems showed an increase with increasing the concentrations of dopants  Sm3+ and Yb3+. Longitudinal VL and shear VS wave velocities were measured at  5 MHz frequency using the pulse-echo technique. Longitudinal (L), shear (G), bulk (K), and Young’s moduli ( E ) have been founded. Moreover, Poisson’s  (σ), Debye temperature (θD), softening temperature (TS), micro-hardness (H) have been founded for every glass sample.   Elastic moduli showed an increase with increasing dopants concentration of (Sm2O3) or  (Yb2O3). Moreover, the bulk modulus of (TWSm) glasses was higher than (TWYb) glasses. Mechanical properties of  (TWSm) and (TWYb) are crucial parameter in manufacturing optical fibers.
IS - 5
PB - OICC Press
KW - Elastic Moduli, Glasses, Rare earth, Tellurite 
EN -