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Structural Studies on Silver Aluminophosphate Glasses and Glass Ceramics
Current Issue
Volume 5, 2018
Issue 2 (April)
Pages: 37-42   |   Vol. 5, No. 2, April 2018   |   Follow on         
Paper in PDF Downloads: 20   Since Jul. 25, 2018 Views: 1113   Since Jul. 25, 2018
Authors
[1]
Gomaa El-Damrawi, Glass Research Group, Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt.
[2]
Abdelmajed Hassan, Glass Research Group, Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt.
[3]
Ahamed Shahboub, Glass Research Group, Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt.
Abstract
Structure of glasses containing (0-20) mol% Al2O3–(20-40) mol%Ag2O-60 mol%P2O5 have been investigated via the analysis of 27Al, 31P MAS- NMR and FTIR spectroscopy. The structural changes within the complicated ternary phosphate glasses were correlated with that of a simple binary silver phosphate. Results show that aluminum acts primary as intermediate ions while silver acts as strong modifier. The number of NBO on average in the structure of silver alminophosphate (SAP) glasses decreases with increasing Al content. The aluminum ions in the structure of SAP glasses exist in both Al (6) and Al (4) coordinations. The fraction of Al (6) increases with increasing Al2O3 concentration. Al (6) fraction is more than Al (4) in high aluminum containing glass which contains 20 mol Al2O3.
Keywords
NMR Studies, Role of Silver Oxide, Phosphate Glasses, Glass Ceramics
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