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Research & Reviews: Journal of Material Sciences | ISSN: 2321-6212 | Volulme 6
November 07-08, 2018 | Atlanta, USA
Materials Science and Engineering
15
th
International Conference and Exhibition on
Applied Crystallography
3
rd
International Conference on
&
Structural changes in lead phosphate glasses doped with vanadyl
C Dayanand
Jawaharlal Nehru Technological University, India
A
series of lead phosphate glasses doped with vanadyl were prepared by a single-step process from PbO and NH
4
H
2
PO
4
. In these
glasses, the transition metal ion as vanadyl VO
2+
ion derived from VOSO
4
5H
2
O as VO
2+
(VS) doped and VO
2+
(VP) is used
as another dopant derived from V
2
O
5
. A Thorough Knowledge of optical properties of transparent glasses will enable successful
utilization of glasses for optical applications such as windows, filters and lasers. The optical absorption spectra of these glasses in the
ultra-violet region have been recorded. The results obtained on the electronic absorption spectra observed to d-d bands. The VO
2+
ions along with the double-bonded oxygen exist in a molecular complex which is identified as VO
5
polyhedra in lead phosphate
glass network. As the PbO content in the glass increases, structural changes take place in the network. The IR spectra of these glasses
were also presented with the results. The glass-modifying role of PbO is extendable up to 66.6 mole% with the glass former P
2
O
5
.
The differences in the IR spectra of phosphate glasses of various compositions arise presumably from the chains being polymerized
to different extents. The role of PbO as glass modifier is almost quantitatively determined by the amount of P
2
O
5
. The characteristic
IR band due to the P=O bond in the P
2
O
5
network is retained until the composition of pyro-phosphate quenched samples (x=0.66)
suggests that PbO does not act as a “glass former” and no complete rupture of the glassy network by Pb
2+
takes place.
dchurya@gmail.comRes. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C8-036