Estimation of kinetic parameters for the phase change memory materials by DSC measurements

Шерченков, А. А.; Kozyukhin, S. A.; Бабич, А. В.

doi:10.1007/s10973-014-3899-8

Cited by 21 publications

(13 citation statements)

References 26 publications

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“…Ratio of the resistivities of amorphous and crystalline states exceeds 10 4 (see Table 1), which is important for the reliable work of PCM. Determined onset crystallization temperature (Tx) adequately correlates with the temperature found earlier by differential scanning calorimetry [12]. Obtained results shows that Tx increases with moving along the quasi-binary line GeTe-Sb2Te3 from GST147 to GST124, and then to GST225, while the phase transition temperature range ΔTn decreases.…”

Section: Fig 2 -Dependencies Of Seebeck Coefficient On Annealing Temsupporting

confidence: 63%

Influence of the Composition on the Thermoelectric and Electro-physical Properties of Ge-Sb-Te Thin Films for Phase Change Memory Application

Lazarenko¹,

Шерченков²,

Kozyukhin³

et al. 2016

J. Nano- Electron. Phys.

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Influence of the composition variation along the quasi-binary line GeTe-Sb2Te3 on the thermoelectric and electro-physical properties of thin films was investigated. GST amorphous thin films have high Seebeck coefficients, which drops nearly on the order of magnitude after the crystallization. Temperature dependences of the resistivities were studied, and it was determined that crystallization temperature increases with moving along the quasi-binary line GeTe-Sb2Te3 from GeSb4Te7 to GeSb2Te4, and then to Ge2Sb2Te5, while the phase transition temperature range decreases. Current-voltage characteristics of amorphous thin films have three voltage ranges with different dependencies due to the different mechanisms of charge carrier transport.

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Section: Fig 2 -Dependencies Of Seebeck Coefficient On Annealing Temsupporting

confidence: 63%

Influence of the Composition on the Thermoelectric and Electro-physical Properties of Ge-Sb-Te Thin Films for Phase Change Memory Application

Lazarenko¹,

Шерченков²,

Kozyukhin³

et al. 2016

J. Nano- Electron. Phys.

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“…Summary of the kinetic parameters for brewer's spent grains and its hydrochars. The activation energy for BSG calculated using Coats-Redfern method and several different reaction mechanisms, The reaction mechanisms and their equations are adapted from[50,81,82].…”

mentioning

confidence: 99%

Pyrolysis Kinetics of Hydrochars Produced from Brewer’s Spent Grains

et al. 2019

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The current market situation shows that large quantities of the brewer’s spent grains (BSG)—the leftovers from the beer productions—are not fully utilized as cattle feed. The untapped BSG is a promising feedstock for cheap and environmentally friendly production of carbonaceous materials in thermochemical processes like hydrothermal carbonization (HTC) or pyrolysis. The use of a singular process results in the production of inappropriate material (HTC) or insufficient economic feasibility (pyrolysis), which hinders their application on a larger scale. The coupling of both processes can create synergies and allow the mentioned obstacles to be overcome. To investigate the possibility of coupling both processes, we analyzed the thermal degradation of raw BSG and BSG-derived hydrochars and assessed the solid material yield from the singular as well as the coupled processes. This publication reports the non-isothermal kinetic parameters of pyrolytic degradation of BSG and derived hydrochars produced in three different conditions (temperature-retention time). It also contains a summary of their pyrolytic char yield at four different temperatures. The obtained KAS (Kissinger–Akahira–Sunose) average activation energy was 285, 147, 170, and 188 kJ mol−1 for BSG, HTC-180-4, HTC-220-2, and HTC-220-4, respectively. The pyrochar yield for all hydrochar cases was significantly higher than for BSG, and it increased with the severity of the HTC’s conditions. The results reveal synergies resulting from coupling both processes, both in the yield and the reduction of the thermal load of the conversion process. According to these promising results, the coupling of both conversion processes can be beneficial. Nevertheless, drying and overall energy efficiency, as well as larger scale assessment, still need to be conducted to fully confirm the concept.

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“…The method involves a comparative analysis of dependencies

\ln \frac{g (α)}{T^{2}}

\frac{1}{italicRT}

, where

g (α)

is the integral form of the model (Table 3),

β = 3, 5, 10, and 20 \frac{° C}{\min}

[38].…”

Section: Resultsmentioning

confidence: 99%

“…T 2 on 1 RT , where g α ð Þ is the integral form of the model (Table 3), β ¼ 3, 5, 10, and 20 C min [38]. Table 4 shows the coefficient of determination R 2 for laser solders based on BSA 25 wt% and BSA 25 wt% and SWCNT 0.1 wt% at the heating rate β = 3 C min .…”

Section: Determination Of a Chemical Reaction Modelmentioning

confidence: 99%

Amendments of weld formation in human skin laser soldering

Ryabkin

Meglinski

Gerasimenko

2023

Journal of Biophotonics

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A computational modeling is employed for quantitative assessment of weld formation and area of tissue temperature necrosis during the human skin laser soldering. The evaluation is carried out depending on the components composition of using solders, including bovine serum albumin (BSA), indocyanine green (ICG), and carbon nanotubes (CNTs), as well as the angle of incidence of laser light and its pulse duration. The influence of CNT on the change of thermodynamic characteristics of albumin denaturation and the rate of formation of the laser weld is investigated. The obtained results suggest to limit the duration of laser light pulse by temperature relaxation time to minimize transfer of thermal energy to reduce the heating of human skin tissues. The developed model has a great potential for further optimization of laser soldering of biological tissues technology with greater efficiency in minimizing the weld area.

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Estimation of kinetic parameters for the phase change memory materials by DSC measurements

Cited by 21 publications

References 26 publications

Influence of the Composition on the Thermoelectric and Electro-physical Properties of Ge-Sb-Te Thin Films for Phase Change Memory Application

Influence of the Composition on the Thermoelectric and Electro-physical Properties of Ge-Sb-Te Thin Films for Phase Change Memory Application

Pyrolysis Kinetics of Hydrochars Produced from Brewer’s Spent Grains

Amendments of weld formation in human skin laser soldering

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