Structural and some physical properties of Sodium Boro-phosphate Glass Containing Mill Scale.

Document Type : Review Articles


1 Egyptian Metrological Authority, Cairo, Egypt

2 Phys. Dept., Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt

3 N.R.C., Egyptian Atomic Energy Authority, Cairo, Egypt


Sodium boro-phosphate glasses containing different amounts of mill scale (65% FeO and 35% Fe2O3) [an iron industry waste formed during the rolling process to produce steel plates] were prepared by the melt quenching technique. The structure and some physical properties of the prepared glasses were investigated using different tools. The amorphous phase of the prepared glass samples was confirmed from their X-ray diffraction. The experimental and empirical densities were found to increase, while the experimental and empirical molar volumes were found to decrease, as mill scale content was increased. By comparing both the experimental and empirical values of density and molar volume, the amorphous nature and short range order character of the studied glasses was confirmed. It was found also that all glass samples behave like semiconductor and both electronic and ionic conductivities were present in these glasses. The correlated barrier hopping model is the appropriate conduction mechanism. The conductivity was found to increase as mill scale content was increased from 10 to 25 mol% , then decreased at sample contains 30 mol% of mill scale, The IR analysis indicated that the iron cations occupy the glass network modifier positions, while the iron cations occupies the glass network former positions only in the sample containing 30 mol% of mill scale. It indicated also that phosphorous cations occupy mainly the tetrahedral coordination state. The volume, mass and molar magnetic susceptibility measurements exhibited gradual increase as mill scale content was increased in the sample composition and all the samples exhibit paramagnetic character.


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