Indian Journal of Pure and Applied Physics

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The Experimental Investigation of Kinetics of Glass Transition of ZBLAN Glass by Using Differential Scanning Calorimetry


Affiliations
1 Condensed matter physics laboratory, Applied Physics Department, Faculty of Tech. & Engg., The M. S. University of Vadodara-390 001, India
2 Polymer Membrane Research laboratory, Applied Physics Department, Faculty of Tech. & Engg., The M. S. University of Vadodara-390 001, India
 

A ZBLAN glass is a heavy metal fluoride (HMF) glass that possesses high thermal stability and excellent property as a transmitting material. The current study examines the thermal properties of ZBLAN glass utilizing Differential scanning calorimetry (DSC) at various heating rates. The temperature of glass transition, Tg, is observed to vary with heating rate, indicating its kinetic nature. Through the use of Kissinger's and Augis- Bennett's methodologies and the heating rate dependency of Tg, the activation energy (E) has been determined. These methodologies have also been used to obtain the fragility index (m), which can be used to evaluate the glass forming ability (GFA) of the system. The fragility index found is greater than 16, indicating that the ZBLAN glass is "fragile."

Keywords

Kinetics of Glass Transition, ZBLAN Glass, Activation Energy, Fragility Index.
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  • The Experimental Investigation of Kinetics of Glass Transition of ZBLAN Glass by Using Differential Scanning Calorimetry

Abstract Views: 116  |  PDF Views: 102

Authors

Margi K. Patel
Condensed matter physics laboratory, Applied Physics Department, Faculty of Tech. & Engg., The M. S. University of Vadodara-390 001, India
Naveen K. Acharya
Polymer Membrane Research laboratory, Applied Physics Department, Faculty of Tech. & Engg., The M. S. University of Vadodara-390 001, India
Arun Pratap
Condensed matter physics laboratory, Applied Physics Department, Faculty of Tech. & Engg., The M. S. University of Vadodara-390 001, India

Abstract


A ZBLAN glass is a heavy metal fluoride (HMF) glass that possesses high thermal stability and excellent property as a transmitting material. The current study examines the thermal properties of ZBLAN glass utilizing Differential scanning calorimetry (DSC) at various heating rates. The temperature of glass transition, Tg, is observed to vary with heating rate, indicating its kinetic nature. Through the use of Kissinger's and Augis- Bennett's methodologies and the heating rate dependency of Tg, the activation energy (E) has been determined. These methodologies have also been used to obtain the fragility index (m), which can be used to evaluate the glass forming ability (GFA) of the system. The fragility index found is greater than 16, indicating that the ZBLAN glass is "fragile."

Keywords


Kinetics of Glass Transition, ZBLAN Glass, Activation Energy, Fragility Index.

References