Abstract
The Cux(Ge30Se70)100−x (0 ≤ x ≤ 12 at.%) chalcogenide alloys have been synthesized by the conventional melt quenching technique. The physical properties such as the mean coordination number, density, molar volume, compactness, overall bond energy, and cohesive energy were estimated for the Cu doped Ge-Se glassy alloys. The chemical bond approach (CBA) was used to predict the type and proportion of the formed bonds in the studied glasses. Subsequently, several structural and physical properties have been estimated. The results show that the studied glasses are rigidly connected, having an average coordination number increase from 2.6 to 2.77. The density and glass compactness show an increase with the Cu content, whereas the main atomic volume decreases. The cohesive energy and the heat of atomization show a similar behavior trend with the enhancement of Cu % in the Ge-Se binary glasses. The optical band gap was estimated theoretically compared with the previously published experimental values for the Cux(Ge30Se70)100−x (0 ≤ x ≤ 12 at.%) thin films. The covalency parameter >91% for the studied glasses so that the compositions may be used as a stable glass former. Furthermore, the mechanical properties as the elastic bulk modulus, Poisson’s ratio, Young’s modulus, micro-hardness, and Debye temperature were investigated as a function of the Cu content.
Highlights
The chalcogenide glasses based on chalcogen elements like sulfur, selenium, and tellurium in the multicomponent system are promising materials in various applications like thermal imaging, optical storage, xerography, optical fibers, and biosensing, etc
Knowing the sample weight in the air (Wair) and the toluene (Wtol), ρ of the studied glasses can be obtained from the equation [31,32]: ρ
Stated that the rigidity of glass might be inferred by knowing the coordination number (CN)
Summary
The chalcogenide glasses based on chalcogen elements like sulfur, selenium, and tellurium in the multicomponent system are promising materials in various applications like thermal imaging, optical storage, xerography, optical fibers, and biosensing, etc. Chalcogenide glasses are seeking more interest in the field of modern science and technology since their physical properties are interesting [1,2,3,4]. These glasses transparency is extended from the mid to far-infrared region [5,6]. The present study’s main aim is to investigate the influence of Cu addition into the Cux(Ge30Se70)100− x (0 ≤ x ≤ 12 at.%) system on the physical parameters like mean coordination number, density, molar volume, compactness etc. The uncertainty in vL and vT is ± 10 m/s
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