Fluorophosphate glasses containing manganese |
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Authors: | T Djouama A Boutarfaia |
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Institution: | a Sciences Chimiques, Bat 10B, Campus Universitaire Beaulieu, University of Rennes 1, F-35042 Rennes, France b Laboratoire Chimie Appliquée, Université M. Khider, BP 145, RP 07000 Biskra, Algérie |
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Abstract: | New fluorophosphate glasses based on MnF2, NaPO3 and MFn (M=Zn2+, Sr2+, Mg2+, Ba2+, Li+, Na+ and K+) have been synthesised and characterized. Large vitreous areas were observed. Samples of 4 mm in thickness have been obtained. These glasses are easy to prepare and stable in ambient air. Depending on the composition and the nature of the M cation, glass transition temperature, Tg, lies between 230 and 314 °C, crystallisation temperature, Tx is between 320 and 475 °C. These glasses are pink coloured, and infrared transmission extends up to 4.5 μm with extrinsic OH− absorption band at 3200 cm−1 and other bands around 2200 and 1600 cm−1 that relate to PO4 tetrahedron vibration. Other physical properties including density, microhardness, Young modulus, thermal expansion and refractive index were investigated and correlated to composition. |
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Keywords: | A Glasses C Differential scanning calorimetry D Mechanical properties D Optical properties D Thermal expansion |
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