Covalent bond approach to the glass-transition temperature of chalcogenide glasses

Tichý, L.; Tichá, H.

doi:10.1016/0022-3093(95)00202-2

Cited by 306 publications

(220 citation statements)

References 17 publications

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“…Crystallization can only occur above T g and so T g can serve as the lower limit for T c . Indeed research has been devoted to the prediction of T g in chalcogenide glasses [11][12][13][14] and recently T g was predicted for the whole ternary Sb-Te-Ge ternary composition range. 11 T g is then estimated as…”

Section: A Influence Of Gementioning

confidence: 99%

On the crystallization of thin films composed of Sb3.6Te with Ge for rewritable data storage

Kooi

Hosson

2004

Journal of Applied Physics

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This article addresses the crystallization of amorphous Sb 3.6 Te films ͑40 nm thick͒ and 5 at. % Ge containing Sb 3.6 Te films ͑10, 20, and 40 nm thick͒ as studied with transmission electron microcopy using in situ annealing. These materials exhibit growth-dominated crystallization, in contrast to the usual Ge 2 Sb 2 Te 5 that shows nucleation-dominated crystallization. Particularly the crystal-growth velocity in these systems has been measured as a function of temperature from which the activation energy for growth can be derived. The strong effect of the 5 at. % Ge addition on the total crystallization behavior is revealed by the following four phenomena: Ge increases the crystallization temperature ͑from 95 to 150°C͒, increases the activation energy for growth ͑from 1.58 to 2.37 eV͒, increases the nucleation rate and decreases the growth anisotropy. The crystallites have a special transrotational structure and a mechanism responsible for the development of this special structure is delineated.

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Section: A Influence Of Gementioning

confidence: 99%

On the crystallization of thin films composed of Sb3.6Te with Ge for rewritable data storage

Kooi

Hosson

2004

Journal of Applied Physics

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“…The parameter r, which determines the deviation of stoichiometry and is expressed by the ratio of the covalent bonding possibilities of chalcogen atoms to that of non-chalcogen atoms, was calculated using the following relation [16,17]: …”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Characterization of quaternary chalcogenide As-Ge-Te-Si thin films

Amer¹

2011

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. Investigated in this paper is the effect of replacement of Te by Si on the optical gap and some other physical operation parameters of quaternary chalcogenide (where x = 0, 5, 10, 12 and 20 at.%) thin films. Thin films with the thickness 100-200 nm of were prepared using thermal evaporation of bulk samples. Increasing Si content was found to affect the average heat of atomization, average coordination number, number of constraints and cohesive energy of the alloys. Optical absorption is due to allowed non-direct transition, and the energy gap increases with increasing Si content. The chemical bond approach has been applied successfully to interpret the increase in the optical gap with increasing silicon content.

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“…The glass is quickly formed under the great cooling rate. Thus, in a first approximation, the transformation is assumed to proceed at a well-defined temperature, the glass-transition temperature, T g [17]; this is one of the most important characterization parameters of the glassy state [18]. T g is a function of viscosity; T g decreases with decreasing viscosity [15].…”

Section: Relation Between the Phase Composition Of The Raw Materials mentioning

confidence: 99%

Synthesis of steel slag ceramics: chemical composition and crystalline phases of raw materials

Zhao

Wei

Bai

et al. 2015

Int J Miner Metall Mater

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Two types of porcelain tiles with steel slag as the main raw material (steel slag ceramics) were synthesized based on the CaO-Al 2 O 3 -SiO 2 and CaO-MgO-SiO 2 systems, and their bending strengths up to 53.47 MPa and 99.84 MPa, respectively, were obtained. The presence of anorthite, α-quartz, magnetite, and pyroxene crystals (augite and diopside) in the steel slag ceramics were very different from the composition of traditional ceramics. X-ray diffraction (XRD) and electron probe X-ray microanalysis (EPMA) results illustrated that the addition of steel slag reduced the temperature of extensive liquid generation and further decreased the firing temperature. The considerable contents of glass-modifying oxide liquids with rather low viscosities at high temperature in the steel slag ceramic adobes promoted element diffusion and crystallization. The results of this study demonstrated a new approach for extensive and effective recycling of steel slag.

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Covalent bond approach to the glass-transition temperature of chalcogenide glasses

Cited by 306 publications

References 17 publications

On the crystallization of thin films composed of Sb3.6Te with Ge for rewritable data storage

On the crystallization of thin films composed of Sb3.6Te with Ge for rewritable data storage

Characterization of quaternary chalcogenide As-Ge-Te-Si thin films

Synthesis of steel slag ceramics: chemical composition and crystalline phases of raw materials

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