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The Effect of Electron Irradiation on the Structure of SodiumAluminum-Iron Phosphate Glasses

Published online by Cambridge University Press:  20 February 2017

S.V. Stefanovsky ,
O.I. Stefanovsky ,
M.I Kadyko ,
V.A. Zhachkin  and
L.D. Bogomolova
S.V. Stefanovsky*
Affiliation:
Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences
O.I. Stefanovsky
Affiliation:
Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences
M.I Kadyko
Affiliation:
Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences
V.A. Zhachkin
Affiliation:
Moscow State Regional University
L.D. Bogomolova
Affiliation:
Research Institute of Nuclear Physics, Lomonosov Moscow State University
*
*(Email: serge.stefanovsky@yandex.com)
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Abstract

Glasses of the series (mol.%) 40 Na2O, (20-x)Al2O3, x Fe2O3, 40P2O5 were irradiated with 8 MeV electrons to dosesequivalent of 0.1, 0.5, and 1.0 MGy and characterized by FTIR spectroscopy andESR at room temperature. FTIR spectra of all the glasses consist of strong bandsdue to O-P-O stretching modes in (PO4)3- and(P2O7)4- units at 1000-1200cm-1, P-O-P stretching modes at 900-950 cm-1(νas) and 700-750 cm-1(νs), and bending modes in the PO4 units. Thewavenumber range lower 800 cm-1 has some contribution due tostretching modes in MO4 and MO6 (M = Al, Fe)units. Moreover the bands at 3300-3700 cm-1 and 1550-1650cm-1 due to stretching and bending modes in both absorbed andstructurally bound H2O molecules were present. As irradiation doseincreases the bands due to stretching and bending modes in water molecules andM-O-H bonds become stronger and are split. No essential changes with increasingdose were observed within the spectral range of stretching modes of the O-P-Oand P-O-P bonds. Irradiation yields phosphorus-oxygen hole centers -PO4 2- (D 5) andPO4 2- (D 6), andPO3 2- ion-radicals (D 2)observable in ESR spectra of low-Fe glasses. At x>5 their responses areoverlapped with strong broad line due to Fe(III). On the whole, with theincrease in iron content the glass structural evolution decrease.

Keywords

radiation effectwaste managementinfrared spectroscopy

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Type
Articles
Information
MRS Advances , Volume 1 , Issue 63-64: Scientific Basis for Nuclear Waste Management XXXIX , 2016 , pp. 4227 - 4232
Copyright
Copyright © Materials Research Society 2017 

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References

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