scholarly journals IRON PHOSPHATE GLASSES: AN ALTERNATIVE FOR VITRIFYING CERTAIN NUCLEAR WASTES

2004 ◽  
Author(s):  
Delbert E Day ◽  
Chandra S Ray ◽  
Cheol-Woon Kim
Keyword(s):  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Nuclear Wastes ◽  
Iron Phosphate Glasses

scholarly journals Iron Phosphate Glasses: An Alternative for Vitrifying Certain Nuclear Wastes

2002 ◽  
Author(s):  
Day, Delbert, E. ◽  
Chandra S Ray ◽  
Cheol-Woon Kim ◽  
Wenhai Huang ◽  
Robert D Leerssen ◽  
...  
Keyword(s):  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Nuclear Wastes ◽  
Iron Phosphate Glasses

scholarly journals IRON PHOSPHATE GLASSES: AN ALTERNATIVE FOR VITRIFYING CERTAIN NUCLEAR WASTES

2003 ◽  
Author(s):  
Delbert E Day ◽  
Chandra S Ray ◽  
Cheol-Woon Kim ◽  
Dongmei Zhu
Keyword(s):  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Nuclear Wastes ◽  
Iron Phosphate Glasses

Speciation of sulphate ions in sodium alumino(iron)phosphate glasses

2019 ◽  
Vol 512 ◽  
pp. 81-89 ◽  
Author(s):  
S.V. Stefanovsky ◽  
O.I. Stefanovsky ◽  
I.L. Prusakov ◽  
M.I. Kadyko ◽  
A.A. Averin ◽  
...  
Keyword(s):  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Iron Phosphate Glasses

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

MRS Advances ◽  
2016 ◽  
Vol 1 (63-64) ◽  
pp. 4227-4232 ◽  
Author(s):  
S.V. Stefanovsky ◽  
O.I. Stefanovsky ◽  
M.I Kadyko ◽  
V.A. Zhachkin ◽  
L.D. Bogomolova
Keyword(s):  
Room Temperature ◽  
Structural Evolution ◽  
Iron Phosphate ◽  
Esr Spectra ◽  
Phosphate Glasses ◽  
Water Molecules ◽  
Oxygen Hole ◽  
Bending Modes ◽  
Iron Phosphate Glasses ◽  
Hole Centers

ABSTRACTGlasses of the series (mol.%) 40 Na2O, (20-x) Al2O3, x Fe2O3, 40 P2O5 were irradiated with 8 MeV electrons to doses equivalent of 0.1, 0.5, and 1.0 MGy and characterized by FTIR spectroscopy and ESR at room temperature. FTIR spectra of all the glasses consist of strong bands due to O-P-O stretching modes in (PO4)3- and (P2O7)4- units at 1000-1200 cm-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. The wavenumber range lower 800 cm-1 has some contribution due to stretching modes in MO4 and MO6 (M = Al, Fe) units. Moreover the bands at 3300-3700 cm-1 and 1550-1650 cm-1 due to stretching and bending modes in both absorbed and structurally bound H2O molecules were present. As irradiation dose increases the bands due to stretching and bending modes in water molecules and M-O-H bonds become stronger and are split. No essential changes with increasing dose were observed within the spectral range of stretching modes of the O-P-O and P-O-P bonds. Irradiation yields phosphorus-oxygen hole centers - PO42- (D5) and PO42- (D6), and PO32- ion-radicals (D2) observable in ESR spectra of low-Fe glasses. At x>5 their responses are overlapped with strong broad line due to Fe(III). On the whole, with the increase in iron content the glass structural evolution decrease.

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