Tetragonal site of transition metal ions doped sodium phosphate glasses

2002 ◽  
Vol 337 (1-2) ◽  
pp. 272-276 ◽  
Author(s):  
R.V.S.S.N. Ravikumar ◽  
V. Rajagopal Reddy ◽  
A.V. Chandrasekhar ◽  
B.J. Reddy ◽  
Y.P. Reddy ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Sodium Phosphate ◽  
Transition Metal Ions ◽  
Phosphate Glasses

scholarly journals OPTICAL ABSORPTION AND EPR STUDY OF TRANSITION METAL IONS DOPED PHOSPHATE GLASSES

1996 ◽  
Vol 6 (0) ◽  
pp. 241-244 ◽  
Author(s):  
MOHAMED HAOUARI ◽  
HAFEDH BEN OUADA ◽  
HASSEN MAAREF ◽  
HUBERT HOMMEL ◽  
ANDRE PIERRE LEGRAND
Keyword(s):  
Transition Metal ◽  
Optical Absorption ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Phosphate Glasses

Effect of Transition-Metal Ions (Ni2+, Cu2+ and Co2+) on the Electric and Dielectric Properties of Zinc Sodium Phosphate

2019 ◽  
Vol 45 (6) ◽  
pp. 503-512 ◽  
Author(s):  
C. Kalai ◽  
M. Kharroubi ◽  
L. Gacem ◽  
S. Balme ◽  
A. Belbel ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Transition Metal ◽  
Metal Ions ◽  
Sodium Phosphate ◽  
Transition Metal Ions

HREM Study of electron-induced surface radiation damage in ReO3

1991 ◽  
Vol 49 ◽  
pp. 636-637
Author(s):  
R. Ai ◽  
H.-J. Fan ◽  
L. D. Marks
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Oxides ◽  
Electron Irradiation ◽  
Transition Metal Oxides ◽  
Carbon Film ◽  
Transition Metal Ions ◽  
Surface Radiation ◽  
Valence Transition ◽  
Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

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