Synthesis and Spectral Properties of Nd 2 O -Doped Sodium Silicophosphate Glass 3
Combined UV-visible and FTIR spectral studies
of undoped and Nd
2
O
–doped sodium silicophosphate
glasses were carried out to characterize the optical
and structural properties of such glasses. The base
undoped silicophosphate glass exhibits strong UV absorption
which is due to the presence of unavoidable trace
iron impurities (mainly Fe
3
3+
ions) present contaminated
within the raw materials used for the preparation of such
glasses. Nd
2
O
–doped glasses show characteristic absorption
bands extending in the entire visible region which
are attributed to the contribution of Nd
3
3+
ions with distinct
peaks which are almost constant with the increase
of dopant. This comes from the combined compact glass
structure containing two glass forming units and the shielding
of the rare-earth ions. Infrared absorption spectra of
the studied glasses reveal characteristic IR bands due to
the combination of both silicate and phosphate groups.
The introduction of Nd
A. M. Abdelghany
a.m
abdelghany@yahoo.com
1
2
3
4
2
O
3
within the dopant level (2 %)
Spectroscopy Department, Physics Division, National
Research Center, Dokki, 12311 Cairo, Egypt
Department of Physics, Faculty of Science,
Damietta University, New Damietta, 34517, Egypt
Glass Department, National Research Center, Dokki, 12311
Cairo, Egypt
Physics Department, Faculty of Science, Damietta University,
Damietta, Egypt
3
· R. Fetouh
4
produces no variations in the IR vibrational bands due to the
presence of the two structural silicate and phosphate groups
giving compactness of the network structure. The deconvoluted
spectra reveal the presence of phosphate groups in a
slightly high ratio due to the high content of P
in the
composition.