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Studies on some alkali-phosphate glasses containing antimony and iron oxides
Faculty
Science
Year:
2004
Type of Publication:
Article
Pages:
729-734
Authors:
Gabr, M, Mostafa, AG, Yahya, GA, Ali, KA, Gomma, NS, Eissa, NA
DOI:
10.1016/j.ssc.2004.03.029
Journal:
SOLID STATE COMMUNICATIONS PERGAMON-ELSEVIER SCIENCE LTD
Volume:
131
Research Area:
Physics
ISSN
ISI:000223669800013
Keywords :
phosphate glasses, glass structure, antimony and iron dopants impurities, Mossbauer spectroscopy
Abstract:
The effect of heat treatment on the Fe2+/Fe3+ ratio in some alkali phosphate glasses containing antimony and iron oxides has been investigated. Differential thermal analysis, Mossbauer spectroscopy, magnetic susceptibility and density measurements as well as the molar volume calculations were used in this study. The obtained data indicate that all glasses show approximately unchangeable stability. It is found, from the area under the Mossbauer absorption spectra that ferrous transformed gradually to ferric ions and the transformation rate constant was found to be 48 min(-1). The elapsed time was found to be 160 min. This transformation represents a first-order solid state reaction. The molar magnetic susceptibility measurements confirm the above results. (C) 2004 Elsevier Ltd. All rights reserved.
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