Network structure of tellurite phosphate glasses: Optical absorption and infrared spectra

1993 ◽  
Vol 73 (1) ◽  
pp. 71-74 ◽  
Author(s):  
A. Abdel‐Kader ◽  
R. El‐Mallawany ◽  
M. M. ElKholy
Keyword(s):  
Optical Absorption ◽  
Infrared Spectra ◽  
Network Structure ◽  
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

Optical absorption of cerium phosphate glasses

1985 ◽  
Vol 4 (4) ◽  
pp. 399-402 ◽  
Author(s):  
Ravishankar Harani ◽  
C. A. Hogarth
Keyword(s):  
Optical Absorption ◽  
Phosphate Glasses ◽  
Cerium Phosphate

Effect of Fe2O3 Contents on the Ions Release from Phosphate-Based Glass

2016 ◽  
Vol 840 ◽  
pp. 29-33
Author(s):  
Mohd Al Amin Muhamad Nor ◽  
Siti Hafizah Mohamad
Keyword(s):  
Weight Loss ◽  
Network Structure ◽  
Glass Structure ◽  
Static Condition ◽  
Phosphate Glasses ◽  
Sem Image ◽  
Melting Technique ◽  
Before And After ◽  
Dark Green ◽  
The Relationship

Currently, phosphate-based glasses have been extensively studied for their special characteristic of being soluble in aqueous medium and capable of releasing ions. This paper presents the relationship between the solubility properties and ion released of phosphate glasses having a composition of 6Al2O3-15K2O-14Na2O-(20-x)CaO-xFe2O3-45P2O5, where x = 2, 4, 6 and 8 wt.%. Clear and free bubbles of dark green glasses were obtained from the used of conventional melting technique at 1300 oC. The ion released and weight loss studies were determined from the immersion of the glass samples in deionised water for about 16 weeks under static condition. IR spectra revealed the formation of phosphate units such as metaphosphate and orthophosphate unit around 1097 cm-1 and 1107 cm-1 with the presence of Fe2O3 in the glass system. SEM image of the phosphate glass structure before and after immersion seems to be associated with the solubility of these glasses. From the study, the concentration of Na+ and K+ release decreased when more Fe2O3 contents were added to the system. Fe2O3 stabilize the network structure via the formation of P-O-Fe bond which more hydration resistant towards water penetrating molecules.

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