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Investigation of structural relaxation in IV - V -VI chalcogenide glasses for infrared applications

By:

Chahal, Shweta

Contributor(s):

Ramesh, K advised

Material type: Text

TextLanguage: en. Publication details: Bengaluru IISc 2022Description: xix, 160p. e- Thesis col. ill. ; 29.1 cm * 20.5 cm 5.744MbSubject(s):

DDC classification:

530 SHW

Online resources:

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Dissertation note: PhD; 2022; Physics Summary: Chalcogenide glasses are well known for their application in infrared transmission and sensing. These glasses are usually prepared by quenching the melt. The arrangement of atoms in the liquid state gets arrested into the solid state possessing high enthalpy in the structure and reaching a metastable state. Upon heating, these glasses undergo an endothermic reaction and exhibit a glass transition temperature (Tg) which is about 2/3 of the melting temperature. The viscosity of the glass decreases at Tg and the glass softens. This property is being exploited by glass technologists to mold the glass into a required shape according to the need of the application. Since glasses are kinetically arrested systems, they tend to relax with time to their most stable state in a thermodynamically non equilibrium state.

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Holdings
Item type	Current library	Call number	Status	Date due	Barcode
E-BOOKS	JRD Tata Memorial Library	530 SHW (Browse shelf(Opens below))	Available		ET00057

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PhD; 2022; Physics

Chalcogenide glasses are well known for their application in infrared transmission and sensing. These glasses are usually prepared by quenching the melt. The arrangement of atoms in the liquid state gets arrested into the solid state possessing high enthalpy in the structure and reaching a metastable state. Upon heating, these glasses undergo an endothermic reaction and exhibit a glass transition temperature (Tg) which is about 2/3 of the melting temperature. The viscosity of the glass decreases at Tg and the glass softens. This property is being exploited by glass technologists to mold the glass into a required shape according to the need of the application. Since glasses are kinetically arrested systems, they tend to relax with time to their most stable state in a thermodynamically non equilibrium state.

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