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Short-range order analysis and some physical properties of InxSe1-x glasses

Identifieur interne : 001566 ( Main/Repository ); précédent : 001565; suivant : 001567

Short-range order analysis and some physical properties of InxSe1-x glasses

Auteurs : RBID : Pascal:12-0185587

Descripteurs français

Pascal (Inist)
- Ordre courte distance, Diffraction RX, Fonction distribution radiale, Distance interatomique, Longueur liaison, Calorimétrie différentielle balayage, Cristallisation, Transition vitreuse, Energie activation, Formation verre, Structure verre, Composition chimique, Séléniure d'indium, Verre chalcogénure.

English descriptors

KwdEn :
- Activation energy, Bond lengths, Chalcogenide glasses, Chemical composition, Crystallization, Differential scanning calorimetry, Glass formation, Glass structure, Glass transition, Indium selenides, Interatomic distances, Radial distribution function, Short-range order, XRD.

Abstract

Bulk In_xSe_1-x (with x=5-25 at%) glasses were prepared using the melt-quench technique. Short range order(SRO) was examined by the X-ray diffraction using Cu(k_α) radiation in the wave vector interval 0.28 ≤ k ≤ 6.5 A^0-1.The SRO parameters have been obtained from the radial distribution function. The inter-atomic distance obtained from the first and second peak are r₁=0.263 and r₂=0.460 nm, which is equivalent In-Se and Se-Se bond length. The fundamental structural unit for the studied glasses is In₂Se₃ pyramid. Using the differential scanning calorimetry (DSC), the crystallization mechanism of In_xSe_1-x chalcogenide glass has been studied. The glass transition activation energy (Eg) is 289 ± 0.3 kj/ mol.There is a correlation amongst the glass forming ability, bond strength and the number of lone pair electrons. The utility of the Gibbs-Di Marzio relation was achieved by estimating T_g theoretically.

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<term>Differential scanning calorimetry</term>
<term>Glass formation</term>
<term>Glass structure</term>
<term>Glass transition</term>
<term>Indium selenides</term>
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<front><div type="abstract" xml:lang="en">Bulk In<sub>x</sub>
Se<sub>1-x</sub>
 (with x=5-25 at%) glasses were prepared using the melt-quench technique. Short range order(SRO) was examined by the X-ray diffraction using Cu(k<sub>α</sub>
) radiation in the wave vector interval 0.28 ≤ k ≤ 6.5 A<sup>0-1</sup>
.The SRO parameters have been obtained from the radial distribution function. The inter-atomic distance obtained from the first and second peak are r<sub>1</sub>
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=0.460 nm, which is equivalent In-Se and Se-Se bond length. The fundamental structural unit for the studied glasses is In<sub>2</sub>
Se<sub>3</sub>
 pyramid. Using the differential scanning calorimetry (DSC), the crystallization mechanism of In<sub>x</sub>
Se<sub>1-x</sub>
 chalcogenide glass has been studied. The glass transition activation energy (Eg) is 289 ± 0.3 kj/ mol.There is a correlation amongst the glass forming ability, bond strength and the number of lone pair electrons. The utility of the Gibbs-Di Marzio relation was achieved by estimating T<sub>g</sub>
 theoretically.</div>
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=0.460 nm, which is equivalent In-Se and Se-Se bond length. The fundamental structural unit for the studied glasses is In<sub>2</sub>
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 chalcogenide glass has been studied. The glass transition activation energy (Eg) is 289 ± 0.3 kj/ mol.There is a correlation amongst the glass forming ability, bond strength and the number of lone pair electrons. The utility of the Gibbs-Di Marzio relation was achieved by estimating T<sub>g</sub>
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Short-range order analysis and some physical properties of InxSe1-x glasses

Short-range order analysis and some physical properties of InxSe1-x glasses

Descripteurs français

English descriptors

Abstract

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Links to Exploration step

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Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri