Enthalpy recovery during structural relaxation of Se96In4 chalcogenide glass

Imran, Mousa M.A.; Bhandari, Deepika; Saxena, N. S.

doi:10.1016/s0921-4526(00)00543-3

Cited by 55 publications

(22 citation statements)

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“…This implies that both methods can be used for successful calculation of the glass transition activation energy. As known, the glass activation energy E a is the amount of energy that is absorbed by a group of atoms in the glassy region so that a jump from one metastable state to another is possible [11]. Among all investigated glasses no significant change in the E a value was found for the glasses with up to 3 at.% of Ag.…”

Section: Glass Transition Activation Energymentioning

confidence: 90%

Kinetic Analysis of Thermal Processes in Ag-As-S-Se System Based on DSC Measurements

et al. 2016

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Thermal properties of glasses from the system Agx(As40S30Se30)100−x for x = 0, 0.5, 1, 3, and 5 at.% were investigated by differential scanning calorimetry. The DSC curves were obtained under non-isothermal conditions which allowed determination of the glass transition temperature Tg (onset temperature), crystallization temperature Tp (corresponding to the crystallization peak maximum), melting temperature Tm, crystallization enthalpy Hc, and melting enthalpy Hm. The DSC curves obtained at the same heating rate were analyzed in order to study the variation of glass transition temperature with Ag concentration. Observed Tg shift toward higher values, with increase in the heating rate, is in agreement with the Lasocka equation. Samples with 3 at.% and 5 at.% Ag were further thermally treated at different heating rates with the aim of analyzing kinetic processes of crystallization. The Moynihan and Kissinger models were used to calculate the activation energy of glass transition and activation energy of crystallization. For the samples that showed the crystallization processes an assessment of the thermal stability was done based on different criteria.

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Section: Glass Transition Activation Energymentioning

confidence: 90%

Kinetic Analysis of Thermal Processes in Ag-As-S-Se System Based on DSC Measurements

et al. 2016

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“…This local minima configuration occurs at particular composition of alloy which refers as a most stable glass (Imran et al, 2001). The activations energies of chalcogenide glasses at the critical temperatures can be interpreted in these words: the glass transition activation energy (E g ), onset crystallization activation energy (E c ) and peak crystallization activation energy (E p ) are the amount of energies which absorbed by a group of atoms for a jump from one metastable state to another state (Imran et al, 2001, Agarwal et al, 1991. Plots of GFA parameter with indium atomic percentage at 5, 10, 15 and 20 K/min heating rates…”

Section: Activation Energymentioning

confidence: 99%

Crystallization Kinetics of Chalcogenide Glasses

Singh¹

2012

Crystallization - Science and Technology

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“…It means atoms possess− ing minimum activation energy and having a higher proba− bility to jump into a metastable state of lower internal energy [89]. Thus, the activation energy of the glasses is the amount of energy which was absorbed by a group of atoms for a jump from one metastable state to another state [89,90]. Usually activations' energies of the glasses descri− bed at the glass transition, onset crystallization and peak crystallization critical temperatures.…”

Section: Activation Energy Of Crystallizationmentioning

confidence: 99%

Recent advancement in metal containing multicomponent chalcogenide glasses

Singh

2012

Opto-Electronics Review

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Amorphous semiconductors or chalcogenide glasses are the key materials in modern optoelectronics to make comfortable life of our society. Understanding of physical properties (like microstructure, thermal, optical, electrical) of these materials is important for their different uses. Predominant study of physical properties of the metal containing multicomponent chalcogenide glasses have attracted much attention, due to their interesting variable features and wide range of structural network modifications. Structural modifications in these materials are usually described with respect to the values of structural units (or average coordination number). In significance to this, the present work demonstrates the chronological development in the field of chalcogenide glasses along with scanning electron microscopy (SEM) morphologies. Optical, electrical and thermal correlative properties of recent developed Se93−xZn2Te5Inx (0 ≤ x ≤ 10) metallic multicomponent chalcogenide glasses are discussed. Variation in SEM morphology, refractive index (n), extinction coefficient (K), optical energy band gap (Eg), electrical conductivity (σav), crystallization activation energy (Ec) and glass forming ability (GFA) with structural units of Se-Zn-Te-In glasses have been demonstrated in this study. Subjected materials thermal, optical and electrical parameters have been achieved higher and lower in a respective manner at the threshold structural unit value 〈r〉.

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Enthalpy recovery during structural relaxation of Se96In4 chalcogenide glass

Cited by 55 publications

References 20 publications

Kinetic Analysis of Thermal Processes in Ag-As-S-Se System Based on DSC Measurements

Kinetic Analysis of Thermal Processes in Ag-As-S-Se System Based on DSC Measurements

Crystallization Kinetics of Chalcogenide Glasses

Recent advancement in metal containing multicomponent chalcogenide glasses

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