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Influence of variation (V2O5/P2O5) ratio on the local structure of iron in V2O5–BaO–Fe2O3–P2O5 glasses

Published online by Cambridge University Press:  01 October 2004

F. Abdel-Wahab ,
G.A. Yahya ,
Karam A. Ali ,
S.M. Salem  and
A.G. Mostafa
F. Abdel-Wahab
Affiliation:
Physics Department, Faculty of Science, South Valley University, Aswan, Egypt
G.A. Yahya
Affiliation:
Physics Department, Faculty of Science, South Valley University, Aswan, Egypt
Karam A. Ali
Affiliation:
Physics Department, Faculty of Science, South Valley University, Aswan, Egypt
S.M. Salem
Affiliation:
Physics Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
A.G. Mostafa
Affiliation:
Physics Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
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Abstract

The influence of the variation in (V2O5/ P2O5) ratio on the local structure of iron in V2O5–BaO–Fe2O3–P2O5 glass system was investigated. Infrared analysis and Mössbauer spectroscopy were used for this propose. Infrared spectroscopic analysis showed that vanadium cations act mainly as network former (NWF) while iron ions occupy both NWF and network modifier (NWM) positions. On the other hand, Mössbauer spectra indicated that, at the lowest V2O5 content, about 29% of iron ions take their positions in the glass matrix as NWF and about 71% of iron ions enter the matrix as network modifier NWM. At the highest value of V2O5 content the iron ions that enter the glass as NWF decrease to about 15%, and the iron ions which enter the glass as NWM increase to about 85%. The density and molar volume measurements also indicate the changes in the structure of these glasses.

Keywords

AmorphousMössbauer effectInfrared (IR) spectroscopy
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 10 , October 2004 , pp. 2849 - 2852
Copyright
Copyright © Materials Research Society 2004

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References

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