Preparation of colourless phosphate glass by stabilising higher Fe[II] in microwave heating

• DOI: 10.1038/s41598-018-24287-1
• Publication Date: 2018-04-12T13:40:05Z
• Authors: Ashis K. Mandal; B. Mandal; Kavya Illath; T. G. Ajithkumar; A. Halder; P. K. Sinha; Ranjan Sen
• Keywords: Microwave heating; Phosphate glass

Iron impurity in raw material remains a major challenge producing colourless glass. In this investigation, we report microwave (MW) heating capable of altering Fe-redox ratio (Fe2+/∑Fe) enabling preparation phosphate The effect Sn concentration retention Fe[II] glass melted MW was compared with conventional glasses. Colourimetric study developing Fe2+-ferrozine colour complex reveals ≥0.49 required to obtain heating, addition 1 wt.% metal powder can impart the desired whereas 1.9 is heating. correlation equation found be different and Thus, exploiting redox changes optical properties tailored. Preservation higher also confirmed by XPS TGA. 31P MAS NMR spectra suggest that transition from cross linked ultra linear polymer metaphosphate network incorporation prepared adopting irradiation. 27A1 relative content Al6+ obtained Energy consumption analysis revels 3.4 kWh while 14 melting using resistance Further, completed within 2 h unlike ~5 needed conventional. plays significant role improving make energy time saving.