scholarly journals AN ALTERNATIVE HOST MATRIX BASED ON IRON PHOSPHATE GLASSES FOR THE VITRIFICATION OF SPECIALIZED WASTE FORMS

2000 ◽  
Author(s):  
Delbert D Day
Keyword(s):  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Alternative Host ◽  
Host Matrix ◽  
Waste Forms ◽  
Iron Phosphate Glasses

Sodium–aluminum–iron phosphate glasses as legacy high level waste forms

2017 ◽  
Vol 94 ◽  
pp. 229-234 ◽  
Author(s):  
S.V. Stefanovsky ◽  
O.I. Stefanovsky ◽  
M.B. Remizov ◽  
P.V. Kozlov ◽  
E.A. Belanova ◽  
...  
Keyword(s):  
Iron Phosphate ◽  
Phosphate Glasses ◽  
High Level Waste ◽  
Waste Forms ◽  
Aluminum Iron ◽  
High Level ◽  
Iron Phosphate Glasses

Iron – Phosphate Glass (IPG) Waste Forms Produced using Induction Melter with Cold Crucible

2003 ◽  
Vol 807 ◽  
Author(s):  
A.S Aloy ◽  
R. A. Soshnikov ◽  
A. V. Trofimenko ◽  
D. Gombert ◽  
D. Day ◽  
...  
Keyword(s):  
Iron Phosphate ◽  
Major Elements ◽  
Phosphate Glasses ◽  
Cold Crucible ◽  
Borosilicate Glasses ◽  
X Ray Diffraction ◽  
High Sodium ◽  
Waste Forms ◽  
Waste Loading ◽  
Iron Phosphate Glasses

ABSTRACTA simulated sodium bearing waste (SBW), which represented a type of high sodium and sulfate waste, was successfully vitrified in iron phosphate glasses (IPG), at a maximum waste loading of 40 wt%, using a cold crucible induction melter (CCIM). Scanning electron microscopy (SEM) and X-ray diffraction (XRD) showed that all of the IPG waste forms did not contain sulfate salt segregation or crystalline phases. The calculated composition and the average analytical composition obtained by Electron Probe Microanalysis (EPMA) were in good agreement. The major elements were uniformly distributed throughout the samples. The chemical durability of the IPG waste forms containing 40wt% SBW was evaluated by the product consistency test (PCT) and met current DOE requirements. IPG waste forms were melted at a relatively low temperature and for short times compared to borosilicate glasses. These advantages, combined with those of a significantly higher waste loading and the feasibility for CCIM melting, offer a considerable savings in time, energy, and cost for vitrifying this high sodium and sulfate waste.

scholarly journals Atomic Structure of Sodium Iron Phosphate Glasses

2020 ◽  
Author(s):  
Bushra M. Al‐Hasni ◽  
Gavin Mountjoy ◽  
Emma Barney
Keyword(s):  
Atomic Structure ◽  
Iron Phosphate ◽  
Phosphate Glasses ◽  
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.

scholarly journals Formation of Reaction Layer and Dissolution Behavior of Alkali and Alkaline-Earth Iron Phosphate Glasses in Water

2020 ◽  
Vol 61 (9) ◽  
pp. 1842-1847
Author(s):  
Atsushi Ihira ◽  
Tatsuaki Sakamoto ◽  
Akira Saitoh ◽  
Hiromichi Takebe
Keyword(s):  
Reaction Layer ◽  
Alkaline Earth ◽  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Dissolution Behavior ◽  
Iron Phosphate Glasses

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

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