Mandal, Ashis Kumar and Sinha, Prasanta Kumar and Das, Dipankar and Guha, Chandan and Sen, Ranjan (2015) Higher Fe2+/total Fe ratio in iron doped phosphate glass melted by microwave heating. Materials Research Bulletin, 63. pp. 141-146. ISSN 0025-5408

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Iron doped phosphate glasses containing P2O5-MgO-ZnO-B2O3-Al2O3 were melted using conventional resistance heating and microwave heating in air and under reducing atmosphere. All the glasses were characterised by UV-Vis-NIR spectroscopy, Mossbauer spectroscopy, thermogravimetric analysis and wet colorimetry analysis. Mossbauer spectroscopy revealed presence of iron predominantly in the ferrous oxidation state on two different sites in all the glasses. The intensity of the ferrous absorption peaks in UV-Vis-NIR spectrum was found to be more in glasses prepared using microwave radiation compared to the glasses prepared in a resistance heating furnace. Thermogravimetric analysis showed increasing weight gain on heating under oxygen atmosphere for glass corroborating higher ratio of FeO/(FeO + Fe2O3) in glass melted by direct microwave heating. Wet chemical analysis also substantiated the finding of higher ratio Fe+2/Sigma Fe in microwave melted glasses. It was found that iron redox ratio was highest in the glasses prepared in a microwave furnace under reducing atmosphere. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type: Article
Subjects: Glass
Divisions: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 31 Dec 2015 06:47
Last Modified: 31 Dec 2015 06:47

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