Micro‐hardness and gamma‐ray attenuation properties of lead iron phosphate glasses

2021 ◽  
Author(s):  
M. S. Al-Buriahi ◽  
Canel Eke ◽  
Sultan Alomairy ◽  
Chalermpon Mutuwong ◽  
Noureddine Sfina
Keyword(s):  
Gamma Ray ◽  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Micro Hardness ◽  
Gamma Ray Attenuation ◽  
Iron Phosphate Glasses

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

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

Thermally stimulated polarization and dc conduction in iron phosphate glasses

1993 ◽  
Vol 162 (3) ◽  
pp. 275-286 ◽  
Author(s):  
A. Moguš-Milanković ◽  
Delbert E. Day
Keyword(s):  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Iron Phosphate Glasses

Effects of alkaline-earth metal oxides on structure and properties of iron phosphate glasses

2016 ◽  
Vol 434 ◽  
pp. 108-114 ◽  
Author(s):  
Sheng Li ◽  
Hongting Liu ◽  
Fengnian Wu ◽  
Ziyuan Chang ◽  
Yunlong Yue
Keyword(s):  
Metal Oxides ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Alkaline Earth Metal ◽  
Structure And Properties ◽  
Alkaline Earth Metal Oxides ◽  
Iron Phosphate Glasses

scholarly journals Thermal properties of Na2O–P2O5–Fe2O3 polyphosphate glasses

2020 ◽  
Vol 142 (1) ◽  
pp. 203-209 ◽  
Author(s):  
Paweł Goj ◽  
Małgorzata Ciecińska ◽  
Magdalena Szumera ◽  
Paweł Stoch
Keyword(s):  
Thermal Properties ◽  
Phosphate Glass ◽  
Transformation Temperature ◽  
Glass Network ◽  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Continuous Change ◽  
Glass Transformation ◽  
Immobilization Techniques ◽  
Iron Phosphate Glasses

Abstract Iron phosphate glasses are materials that can have many applications like durable matrixes in waste immobilization techniques, biomaterials, optoelectronic devices, etc. Their possible usage is related to their glass network and thermal properties. The influence of Na2O content on thermal properties and crystallization ability of iron phosphate glass of base composition 30 Fe2O3–70 P2O5 mol% were studied. Increasing the content of Na2O causes a decrease in transformation temperature and increase in ΔCp. Characteristic temperatures, thermal stability and crystallizing phases were determined. Increasing content of sodium causes depolarization of iron phosphate glass network which causes a continuous change in ΔCp and glass transformation temperature. Discontinuous change in some glass properties suggests structure rebuilding about 30 mol% of Na2O.

Sign in / Sign up

Export Citation Format

Share Document