Thermal Analysis of Se-based Chalcogenide Glass

Structural, thermal and optical studies of Eu3+ ion doped Ge22As20Se58 glass

“…From the obtained DSC curves, the observed two glass transition temperatures essentially indicated that the Ge 22 As 20 Se 58 glass has two molecular structures as the Se network is highly reticulated by the trivalent As (As 2 Se 3 ) and tetravalent Ge (GeSe 4 ) structure, which can be corroborated with their Raman spectra as well [19,20]. Accordingly, the glass transition takes place at Tg in the case of pristine Ge 22 As 20 Se 58 glass (figure 5(a)), while it is greatly affected in the case of Eu-doped Ge 22 As 20 Se 58 glass (figure 5(b)) due to its established amorphous nature.…”

“…Accordingly, the glass transition takes place at Tg in the case of pristine Ge 22 As 20 Se 58 glass (figure 5(a)), while it is greatly affected in the case of Eu-doped Ge 22 As 20 Se 58 glass (figure 5(b)) due to its established amorphous nature. This signifies that when this glass is heated above this Tg, the material will become vicious and will not show any further crystallization tendency, and therefore, it becomes suitable for molding optics under moderate pressure [19]. For instance, figure 6 shows some of the sophisticated infrared optics including aspheric and asphero-diffractive lenses, which can be directly inserted into a thermal imaging system such as an infrared camera.…”