Journal ArticleDOI
Studies of glass transition temperature and thermal diffusmty in As-Sb-Se glasses
K. Nandakumarand,Jacob Philip +1 more
Reads0
Chats0
TLDR
In this article, the photoacoustic technique has been used for the determination of the glass transition temperature T g and the thermal diffusivity α in several glasses belonging to the As-Sb-Se system.Abstract:
The photoacoustic (PA) technique has been used for the determination of the glass-transition temperature T g and the thermal diffusivity α in several glasses belonging th the As-Sb-Se system. The compositional dependence of T g and α are reported for AsxSb5Se95-x, AsxSb10Se90-x, AsxSb15Se85-x and AsxSb20Se80-x glasses. The results are discussed on the basis of a chemically ordered network model and a threshold for rigidity corresponding to an average coordination number of 2.4.read more
Citations
More filters
Journal ArticleDOI
Compositional dependence optical properties study of As40Se60 − xSbx thin films
TL;DR: The relationship between the structural and optical properties and compositional variation has been investigated in this paper, where the optical band gap E-o decreases while the width of localized states (Urbach energy) E-e increases.
Journal ArticleDOI
Composition dependence of optical band gap and thermal diffusivity of AsTeSe glasses
K. Nandakumar,Jacob Philip +1 more
TL;DR: In this paper, the composition dependence of the optical band gap, E0, and thermal diffusivity, α, of As Te Se glasses, prepared by the conventional melt-quenching technique, have been determined using photoacoustic technique which is based on the detection of the acoustic signal produced when a modulated light beam is incident on the sample.
Journal ArticleDOI
A comparative study on the glass-forming ability of some alloys in the Sb–As–Se system by differential scanning calorimetry
TL;DR: In this article, a kinetic parameter K r (T ) is added to the stability criteria, and the thermal stability of some ternary compounds of Sb x As 0.60−(2 x + y ) Se 0.40+x + y -type has been evaluated experimentally and correlated with the activation energies of crystallization.
Journal ArticleDOI
Characteristics of photoconductivity in As-Sb-Se glasses
TL;DR: In this article, the authors measured the photoconductivity in As Sb15Se85−x and Sb10Se90−x bulk glass systems using a COCN model and showed a clear change in slope corresponding to the stoichiometric composition in both the systems.
Journal ArticleDOI
Anomalous behaviour in the composition dependence of the photoacoustic properties of SiAsTe glasses
TL;DR: In this paper, the optical bandgap and thermal diffusivity of Si 10 As x Te 90−x (10 ≤ x ≤ 50) and Si 15 As x T 85− x (5 ≤ X ≤ 40) glasses have been measured using the photoacoustic technique.
References
More filters
Journal ArticleDOI
Topology of covalent non-crystalline solids I: Short-range order in chalcogenide alloys
TL;DR: In this article, an atomic model is introduced which for predominantly covalent forces constitutes the first microscopic realization of Kauzmann's description of the glass transition as an entropy (not enthalpy or volume) crisis.
Journal ArticleDOI
Continuous deformations in random networks
TL;DR: In this paper, the authors examine the differences between covalent random networks with high and low average coordination and make rigorous assumptions about the number of continuous deformations (i.e., zero frequency modes) allowed within the network.
Book
Photoacoustics and Photoacoustic Spectroscopy
TL;DR: The recognized leader in the modern development of the field presents both theory and applications as mentioned in this paper, and provides a comprehensive survey of applications, from spectroscopy and chemistry analysis to medical applications and thermal analysis.
Journal ArticleDOI
Constraint theory, vector percolation and glass formation
J.C. Phillips,Michael Thorpe +1 more
TL;DR: In this paper, the Phillips constraint theory of glass formation was applied to numerical simulations of vector percolation with nearest neighbor central forces, showing that the correct non-central vector threshold lies between the scalar and central vector thresholds.
Journal ArticleDOI
Calorimetric measurements on as-sb-se glasses
TL;DR: In this article, results of thermal analysis performed at different heating rates on eight glasses of the As-Sb-Se system, with compositions represented by (As, Sb) 40 Se 60 and As x Sb 15 Se 85 − x are reported and discussed.