Intermediate crystallization kinetics in Germanium-Tellurides

Chen, Yimin; Pan, Hongbo; Mu, Sen; Wang, Guoxiang; Wang, Guoxiang; Shen, Xiang; Wang, Jun-Qiang; Dai, Shixun; Xu, Tao

doi:10.1016/j.actamat.2018.10.051

Cited by 21 publications

(6 citation statements)

References 46 publications

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“…We can conclude that all the values of η ∞ are converged into the standard value of 1 × 10 –2.93 Pa s reported by Zheng et al The value of U max is maximum for Te and minimum for Se with the difference of ∼2 to 3 orders of magnitude in each other. The lower U max is, the larger reduced temperature T max / T m is, which follows the normal rule concluded by Orava et al Moreover, the relation between U max and T rg is in agreement with the empirical rule suggested by Chen et al The relation between fragility m and decoupling coefficient ξ for the chalcogens was displayed in Figure . It is evident that the present results are roughly in line with the relation reported by Ediger et al, ξ ≈ 1.1–0.005 m , as shown the red line in Figure .…”

Section: Disscussionsupporting

confidence: 86%

New Methods Versus Old Questions: Crystallization Kinetics of S, Se, and Te

Chen

Wang²,

Shen³

et al. 2019

Crystal Growth & Design

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Using conventional differential scanning calorimetry (DSC) and Flash DSC, we revisited the old question of crystallization kinetics of chalcogens. Together with the appropriate viscosity models and Stokes− Einstein relation, the quantitative results of crystallization kinetics in chalcogenide supercooled liquids were revealed. It showed that the fragilities of S, Se, Te are 126, 67.5, 60, and the maximum crystal growth rates are 9.7 × 10 −3 , 1.3 × 10 −6 , and 0.47 m s −1 at 0.91, 0.94, and 0.86 T m , respectively. Such results not only benefit to understand the fundamental science but also help to design new chalcogenide compositions for applications.

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Section: Disscussionsupporting

confidence: 86%

New Methods Versus Old Questions: Crystallization Kinetics of S, Se, and Te

Chen

Wang²,

Shen³

et al. 2019

Crystal Growth & Design

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“…They also have the similar T rg ( T g / T m ) about 0.61. This is in line with the relation between U max and T rg that we have been reported before …”

Section: Resultssupporting

confidence: 93%

“…This is in line with the relation between U max and T rg that we have been reported before. 29 To make it clear to show the differences in the crystal growth rate of GGS and GGS-Au glasses, the logarithmic plots of U are presented in Figure 6B. Two crossovers at 1100 and 761 K can be detected clearly, indicating the differences in temperature-dependent U between pure-and Au-doped GGS.…”

Section: Chen Et Almentioning

confidence: 99%

Quantitative estimation of crystallization kinetics in GeGaS and Au‐doped GeGaS glass‐ceramics

Chen

Yang

et al. 2019

J Am Ceram Soc

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Ge26.7Ga8S65.3 (GGS) and 0.1% Au‐doped Ge26.7Ga8S65.3 (GGS‐Au) glasses were prepared and annealed at a temperature that is 20 K higher than their respective glass transition temperature in order to create chalcogenide glass‐ceramics. X‐ray diffraction results showed that, thermal annealing can induce large amount of the crystal growth in the pure glass but this can be significantly suppressed by Au doping in the glass, which is in agreement with the previous results. We further employed various calorimetric methods, together with Mauro‐Yue‐Ellison‐Gupta‐Allan viscosity model, to investigate their crystallization kinetics. The crystal growth rate at annealing temperature of 723 K was quantitatively deduced to be 2.5 × 10−8 μm/s in Au‐doped GGS, which is about 20 times slower than that in the pure GGS with a growth rate of 4.7 × 10−7 μm/s.

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“…They are also used to immobilize nuclear waste, in hard disc substrates and as precursors of glass‐ceramics used for ballistic protection . Furthermore, in recent years, an impressive number of chalcogenide, organic, and metallic glasses have been developed, which have unusual, interesting properties …”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7][8] Furthermore, in recent years, an impressive number of chalcogenide, organic, and metallic glasses have been developed, which have unusual, interesting properties. [9][10][11][12][13][14] The vast number of applications of vitreous materials is due to the possibility of continuously adjusting their compositions to achieve optimum performance. Glasses are nonequilibrium, noncrystalline substances that spontaneously relax toward the supercooled liquid state, 15 with no constraint of satisfying crystal chemistry (stoichiometry) requirements.…”

Section: Introductionmentioning

confidence: 99%

Viscosity and liquidus‐based predictor of glass‐forming ability of oxide glasses

et al. 2019

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Glass‐forming ability (GFA) is a measure of the easiness to vitrify a given substance. Theoretically, it is possible to make a glass from any liquid provided it is quenched from its liquidus temperature with a cooling rate above a critical value Rc to avoid crystallization. However, measuring GFA is a laborious and time‐consuming task. Moreover, predicting the GFA of substances that have never been vitrified is of greater interest. Here, we propose and evaluate a new parameter that can predict the glass forming ability of oxide mixtures. We derived a mother parameter, GFA = 1/Rc ∝ [U(Tmax) × TL]−1, where U(Tmax) is the maximum crystal growth rate, and TL is the liquidus temperature, which strongly correlates with the experimental critical cooling rates of oxide glass‐formers. A simplified version derived from the mother parameter—which does not need (scarce) crystal growth rate data and only relies on viscosity η and TL, GFA ∝ [η(TL)/TL2]—also correlates well with the Rc of several oxide compositions. This new GFA parameter, dubbed Jezica, works when heterogeneous nucleation prevails. It corroborates the widespread concept that substances having high viscosity at TL, and a low TL can be easily vitrified, and provides a powerful tool for the quest and design of novel glasses.

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Intermediate crystallization kinetics in Germanium-Tellurides

Cited by 21 publications

References 46 publications

New Methods Versus Old Questions: Crystallization Kinetics of S, Se, and Te

New Methods Versus Old Questions: Crystallization Kinetics of S, Se, and Te

Quantitative estimation of crystallization kinetics in GeGaS and Au‐doped GeGaS glass‐ceramics

Viscosity and liquidus‐based predictor of glass‐forming ability of oxide glasses

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