Effect of P2O5 and MnO2 on crystallization of magnetic glass ceramics

This work pointed out the effect of adding P2O5 and/or MnO2 on the crystallization behavior of magnetic glass ceramic in the system Fe2O3·ZnO·CaO·SiO2·B2O3. The differential thermal analysis of the quenched samples revealed decrease in the thermal effects by adding P2O5 and/or MnO2 to the base sampl...

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Bibliographic Details
Published in:Journal of advanced research 2014-09, Vol.5 (5), p.543-550
Main Authors: Abdel-Hameed, Salwa A.M., Marzouk, Mohamed A., Farag, Mohamed M.
Format: Article
Language:English
Subjects:
Glass ceramics
Magnetic properties
Magnetite
Original
X-ray method
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Summary:This work pointed out the effect of adding P2O5 and/or MnO2 on the crystallization behavior of magnetic glass ceramic in the system Fe2O3·ZnO·CaO·SiO2·B2O3. The differential thermal analysis of the quenched samples revealed decrease in the thermal effects by adding P2O5 and/or MnO2 to the base sample. The X-ray diffraction patterns show the development of nanometric magnetite crystals in a glassy matrix. Heat treatment at 800°C for 2h, under reducing atmosphere, caused an increase in the amount of the crystallized magnetite with the appearance of minor hematite and Ca2SiO4. The transmission electron microscope revealed a crystallite size in the range 10–30nm. Magnetic hysteresis cycles were analyzed with a maximum applied field of 25kOe at room temperature. The prepared magnetic glass ceramics are expected to be useful for localized treatment of cancer.
ISSN:2090-1232
2090-1224
DOI:10.1016/j.jare.2013.07.001