Please use this identifier to cite or link to this item:
|Title:||Thermal, electrical and XPS studies of Ag2O · TeO2 · P2O5 glasses|
|Authors:||Chowdari, B.V.R. |
Pramoda Kumari, P.
|Citation:||Chowdari, B.V.R., Pramoda Kumari, P. (1996-04). Thermal, electrical and XPS studies of Ag2O · TeO2 · P2O5 glasses. Journal of Non-Crystalline Solids 197 (1) : 31-40. ScholarBank@NUS Repository. https://doi.org/10.1016/0022-3093(95)00548-X|
|Abstract:||A series of silver ion conducting glasses have been synthesized by progressive replacement of P2O5 by TeO2 in the 0.50 Ag2O · 0.50[xTeO2 · (1 - x)P2O5] system. A wide glass-forming region extending from x = 0 to x = 0.9 was found. The glass of composition corresponding to x = 0.4 was found to have the highest Tg = 196.7 ± 0.1°C. The ionic conductivity was found to increase by about two orders of magnitude with increase in TeO2 content. While σ25°C = (1.93 ± 0.43) × 10-6 S cm-1, the electronic conductivity was found to be (3.11 ± 0.14) × 10-10 S cm-1 for the composition 0.50Ag2O · 0.30TeO2 · 0.20P2O5. X-ray photoelectron spectroscopy studies of these glasses reveal information about the structural modifications leading to the creation of bridging oxygens and non-bridging oxygens. The detailed analysis of the Te 3d XPS spectrum of the binary and ternary systems shows the existence of different Te-based structural units like TeO4, TeO3 -, TeO2- 3 and Ag-Te bond. The results from the ternary system suggest the unique role played by P2O5 in the conversion of TeO4 units leading to the creation of Ag-Te bond and TeO2- 3 units.|
|Source Title:||Journal of Non-Crystalline Solids|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 14, 2019
WEB OF SCIENCETM
checked on Jan 29, 2019
checked on Dec 14, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.