Raman and DSC studies of fragility in tellurium-zinc oxide glass formers

Elissaios Stavrou; Sotiria Kripotou; Constantine Raptis; Sylvia Turrell; Karl Syassen

doi:10.1002/pssc.201000719

Raman and DSC studies of fragility in tellurium-zinc oxide glass formers

Elissaios Stavrou^*, Sotiria Kripotou, Constantine Raptis, Sylvia Turrell, Karl Syassen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Raman scattering and differential scanning calorimetry (DSC) measurements have been carried out in four mixed (TeO₂)_1-x(ZnO)_x (x = 0.1, 0.2, 0.3, 0.4) glasses at high temperatures (Raman and DSC through the glass transition) and high pressures (Raman) with the aim of determining the fragility of these glass forming oxides. Four different criteria, corresponding to four parameters, were applied to assess the fragility of the glasses. From the DSC studies, we have obtained the fragility parameter m which corresponds to the slopes of Arrhenius (lnQ vs. 1/T_g, were Q is the heating rate) plots, and the glass transition width ΔT_g. Also, from the low-frequency Raman scattering, and in particular the boson peak intensity of the glasses at T_g, we have estimated the fragility ratio r_R (T_g) = I_min/I_max whose value serves as another (empirical) fragility criterion. Finally, from high pressure Raman measurements on the glasses, we have estimated the Grüneisen parameter γ_T for each glass, which constitutes the fourth fragility parameter adopted in this work. Considering the four parameters ΔT_g, m, r (T_g) and γ_T and the generally accepted (empirical) fragility criteria, we conclude that the mixed tellurium-zinc oxides constitute strong-to-intermediate glass formers.

Original language	English
Pages (from-to)	3039-3042
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	8
Issue number	11-12
DOIs	https://doi.org/10.1002/pssc.201000719
State	Published - Nov 2011
Externally published	Yes

Keywords

Boson peak
Fragility
Glass transition
Tellurite glasses

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title = "Raman and DSC studies of fragility in tellurium-zinc oxide glass formers",

abstract = "Raman scattering and differential scanning calorimetry (DSC) measurements have been carried out in four mixed (TeO2)1-x(ZnO)x (x = 0.1, 0.2, 0.3, 0.4) glasses at high temperatures (Raman and DSC through the glass transition) and high pressures (Raman) with the aim of determining the fragility of these glass forming oxides. Four different criteria, corresponding to four parameters, were applied to assess the fragility of the glasses. From the DSC studies, we have obtained the fragility parameter m which corresponds to the slopes of Arrhenius (lnQ vs. 1/Tg, were Q is the heating rate) plots, and the glass transition width ΔTg. Also, from the low-frequency Raman scattering, and in particular the boson peak intensity of the glasses at Tg, we have estimated the fragility ratio rR (Tg) = Imin/Imax whose value serves as another (empirical) fragility criterion. Finally, from high pressure Raman measurements on the glasses, we have estimated the Gr{\"u}neisen parameter γT for each glass, which constitutes the fourth fragility parameter adopted in this work. Considering the four parameters ΔTg, m, r (Tg) and γT and the generally accepted (empirical) fragility criteria, we conclude that the mixed tellurium-zinc oxides constitute strong-to-intermediate glass formers.",

keywords = "Boson peak, Fragility, Glass transition, Tellurite glasses",

author = "Elissaios Stavrou and Sotiria Kripotou and Constantine Raptis and Sylvia Turrell and Karl Syassen",

year = "2011",

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T1 - Raman and DSC studies of fragility in tellurium-zinc oxide glass formers

AU - Stavrou, Elissaios

AU - Kripotou, Sotiria

AU - Raptis, Constantine

AU - Turrell, Sylvia

AU - Syassen, Karl

PY - 2011/11

Y1 - 2011/11

N2 - Raman scattering and differential scanning calorimetry (DSC) measurements have been carried out in four mixed (TeO2)1-x(ZnO)x (x = 0.1, 0.2, 0.3, 0.4) glasses at high temperatures (Raman and DSC through the glass transition) and high pressures (Raman) with the aim of determining the fragility of these glass forming oxides. Four different criteria, corresponding to four parameters, were applied to assess the fragility of the glasses. From the DSC studies, we have obtained the fragility parameter m which corresponds to the slopes of Arrhenius (lnQ vs. 1/Tg, were Q is the heating rate) plots, and the glass transition width ΔTg. Also, from the low-frequency Raman scattering, and in particular the boson peak intensity of the glasses at Tg, we have estimated the fragility ratio rR (Tg) = Imin/Imax whose value serves as another (empirical) fragility criterion. Finally, from high pressure Raman measurements on the glasses, we have estimated the Grüneisen parameter γT for each glass, which constitutes the fourth fragility parameter adopted in this work. Considering the four parameters ΔTg, m, r (Tg) and γT and the generally accepted (empirical) fragility criteria, we conclude that the mixed tellurium-zinc oxides constitute strong-to-intermediate glass formers.

AB - Raman scattering and differential scanning calorimetry (DSC) measurements have been carried out in four mixed (TeO2)1-x(ZnO)x (x = 0.1, 0.2, 0.3, 0.4) glasses at high temperatures (Raman and DSC through the glass transition) and high pressures (Raman) with the aim of determining the fragility of these glass forming oxides. Four different criteria, corresponding to four parameters, were applied to assess the fragility of the glasses. From the DSC studies, we have obtained the fragility parameter m which corresponds to the slopes of Arrhenius (lnQ vs. 1/Tg, were Q is the heating rate) plots, and the glass transition width ΔTg. Also, from the low-frequency Raman scattering, and in particular the boson peak intensity of the glasses at Tg, we have estimated the fragility ratio rR (Tg) = Imin/Imax whose value serves as another (empirical) fragility criterion. Finally, from high pressure Raman measurements on the glasses, we have estimated the Grüneisen parameter γT for each glass, which constitutes the fourth fragility parameter adopted in this work. Considering the four parameters ΔTg, m, r (Tg) and γT and the generally accepted (empirical) fragility criteria, we conclude that the mixed tellurium-zinc oxides constitute strong-to-intermediate glass formers.

KW - Boson peak

KW - Fragility

KW - Glass transition

KW - Tellurite glasses

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ER -

Raman and DSC studies of fragility in tellurium-zinc oxide glass formers

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Keywords

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