New quaternary chalcogenide glasses with wide range IR transparency

Quaternary chalcogenide glasses based on sulphur and selenium Se80S18Tl2-xYbx (x = 0, 0.1, 0.2, 0.5 and 1) and Se(65)S(10)G(15+x)In(10-x) (x = 0 and 5) were synthesized using the melt-quench technique. Formation of quaternary chalcogenide glasses was confirmed by Powder x-ray diffraction studies. Our differential scanning calorimetric studies on these glasses also are in good agreement with powder x-ray diffraction results. Thermo Gravimetric studies reveal the good thermal stability of these glasses. The IR transparency of Se80S18Tl1.5Yb0.5 extends throughout the range 3-25 mu m and thus are good candidates for Infrared transmission applications.