Structural study by Raman spectroscopy and 77Se NMR of GeSe4 and 80GeSe2–20Ga2Se3 glasses synthesized by mechanical milling

• Analysis of GeSe4 and 80GeSe2–20Ga2Se3 amorphous powders made by mechanical milling
• 77Se NMR in chalcogenide glasses obtained by mechanical milling
• Gallium enhances the amorphization process by mechano-synthesis.
• Increasing Se content in the glass skeleton by mechanical milling

Amorphous powders of GeSe4 and 80GeSe2–20Ga2Se3 compositions have been prepared by mechanical alloying of raw Germanium, Selenium and Gallium. The amorphization process and structural evolution of the powder during mechanical alloying have been studied by XRD, DSC, Raman spectroscopy and 77Se NMR. The role of Gallium in the amorphization process has been pointed out. Similar structures and thermal properties of amorphous powders and respective glasses synthesized by melt-quenching method have been observed.