Physical and structural properties of erbium doped tellurite glass embedded with zinc oxide nanoparticles / Ummi Kalthum Abd Rahman

Two series of tellurite glass were prepared by using melt-quenching techniques
with the composition of (85-x)TeO2-10Na2O-3MgO-2 Li2C03-xEr2O3 and (84.5y)
TeO2-1O Na2O -3MgO-2 Li2CO3-O.5 Er2O3-yZnO where x= 0, 0.5, 1.0, 1.5,2.0
mol% and y=0, 0.25, 0.50, 0.75 and 1.0 mol%. From the study, the physical
properties have been measured in terms of density and molar volume. The
structural properties of the glasses were determined by using Fourier Transform
Infrared (FTIR) and Raman spectroscopy. The amorphosity of the glass is
confirmed through X-ray Diffraction (XRD). The glass density and molar volume
of different Er2O3 concentration are found in the range of (4.841- 4.889) g/cm3 and
(30.073 - 30.477) cm3/mo1 respectively. Meanwhile, the glass density and molar
volume of different ZnO NPs concentration are found in the range (4.857- 4.802)
g/cm3 and (29.951- 30.171) cm3/mo1 respectively. From FTIR, the absorption band
for series 1 and series 2 show peaks at range from (400-500) cm-1
, (600-640) cm-1
and (680-700) cm-1. Meanwhile, the Raman spectroscopy band that indicate the
structural arrangements of Te - units are shown at 460 cm-1, 480 cm-1, 510 cm-1, 680 cm-1 and 780 cm-1 for series 1. Meanwhile, for series 2, it has been observed
at 450 cm-1, 500 cm-1, 510 cm-1, 680 cm-1 and 750 cm-1