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Effect of the addition of Fe2O3 and heat treatment duration on the magnetic susceptibility of V2O5-P2O5-B2O3 glass system

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Abstract

The effect of the addition of Fe2O3 and heat treatment duration on the magnetic susceptibility of vanadium borophosphate glass were studied. The magnetic susceptibility of glass samples was found to increase with increasing Fe2O3 content, which may be explained by the formation of the FeO6 group and the change of Fe2+ to Fe3+ which has higher paramagnetic properties. No detectable changes in the magnetic susceptibility with heat treatment for the samples containing 0.0, 0.5 and 1.0 mol% Fe2O3 was observed. The magnetic susceptibility for the heat treated samples containing 2.5, 5.0 and 7.5 mol% Fe2O3 decreases sharply with increasing duration of heat treatment up to 6 h and then remains almost constant. The sharp decrease in magnetic susceptibility of 2.5 mol% Fe2O3 is attributed to the increase in the number of ferrous ions. The sharp decrease for samples containing 5.0 and 7.5 mol% Fe2O3 is attributed to the increase in the number of Fe3+ in tetrahedral co-ordination. The rate of crystallization owing to the heat treatment was calculated and was found to increase with increasing iron oxide content. The geometry of crystallization was found to be in three-, two-and one-dimension(s) for samples containing 2.5, 5.0 and 7.5 mol% Fe2O3, respectively.

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Authors and Affiliations

  1. Physics Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt

    I. Kashif, H. Farouk, S. A. Aly, A. M. Sanad & M. H. El-Kottamy

  2. Physics and Chemistry Department, Faculty of Education, Kafr El-Sheikh, Tanta University, Tanta, Cairo, Egypt

    E. E. Assem

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  1. I. Kashif
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  2. H. Farouk
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  3. S. A. Aly
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  4. A. M. Sanad
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  5. M. H. El-Kottamy
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  6. E. E. Assem
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Kashif, I., Farouk, H., Aly, S.A. et al. Effect of the addition of Fe2O3 and heat treatment duration on the magnetic susceptibility of V2O5-P2O5-B2O3 glass system. J Mater Sci: Mater Electron 3, 144–146 (1992). https://doi.org/10.1007/BF00695510

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  • DOI: https://doi.org/10.1007/BF00695510

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