Thermal decomposition study of GeSI2 and Ge2S3I2 glassy alloys

GeSI2 and Ge2S3I2 glasses are prepared by interaction of germanium(IV) iodide, germanium and sulfur in evacuated silica-glass ampoules at temperatures of 450°C and 550°C, respectively. Germanium(IV) sulfide and germanium(IV) iodide are determined by means of X-ray diffraction analysis and energy-dis...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2015-03, Vol.411, p.40-44
Main Authors: Velmuzhov, A.P., Sukhanov, M.V., Plekhovich, A.D., Suchkov, A.I., Shiryaev, V.S.
Format: Article
Language:English
Subjects:
Alloys
Ampoules
Chalcogenide glasses
Decomposition
Differential scanning calorimetry
Diffraction
Germanium sulfide-iodides
Glass
Iodides
Kinetics analysis
Sulfides
Thermal decomposition
X-rays
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Summary:GeSI2 and Ge2S3I2 glasses are prepared by interaction of germanium(IV) iodide, germanium and sulfur in evacuated silica-glass ampoules at temperatures of 450°C and 550°C, respectively. Germanium(IV) sulfide and germanium(IV) iodide are determined by means of X-ray diffraction analysis and energy-dispersive X-ray microanalysis as the main products of their decomposition. The kinetics of decomposition of these glasses under polythermal conditions is investigated in the temperature range of 50–850°C by means of thermogravimetric analysis and differential scanning calorimetry. The values of the activation energy of alloy decomposition, corresponding to the most intense period of acceleration, are 72.8±1.0kJ/mol for GeSI2 and 192±29kJ/mol for Ge2S3I2. •The GeSI2 and Ge2S3I2 glasses were prepared from GeI4, Ge and sulfur.•The products of thermal decomposition of GeSI2 and Ge2S3I2 were determined.•The kinetics of decomposition of these glasses was investigated.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2014.09.018