Results 211 to 220 of about 11,127,655 (242)

Non-isothermal kinetic equations applied to crystallization of glasses

Thermochimica Acta, 1993
Abstract Three of the most important equations for evaluating the activation energy of a chemical reaction are discussed in the present paper: a modification of the Kissinger equation, a graphic method and a derivative method. They are based on thermal analysis measurements under non-isothermal conditions.
BARBIERI, Luisa, LEONELLI, Cristina, MANFREDINI, Tiziano, ROMAGNOLI, Marcello, PELLACANI, Gian Carlo, SILIGARDI, Cristina   +5 more
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Non-isothermal crystallization kinetics of waxy crude oil

Petroleum Science and Technology, 2018
The crystallization behavior of Shengli waxy crude oil from the sol state to gel state was studied by the microscopic observation and DSC curve.
Bingfan Li, Gang Liu, Shuyi Ren, Lei Chen, Houxing Teng, Xingguo Lu, Junjie Gao   +6 more
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Non-isothermal crystallization kinetics of Zr52Cu18Ni14Al10Ti6 metallic glass

Journal of Thermal Analysis and Calorimetry, 2015
In the present work, the thermal analysis of the bulk metallic glass with composition Zr52Cu18Ni14Al10Ti6 has been done by differential scanning calorimetry (DSC) through non-isothermal method. DSC curves indicate a two-step crystallization process at all four heating rates, i.e., 5, 10, 15, and 20 °C min−1.
Sonal R. Prajapati, Supriya Kasyap, Ashmi T. Patel, Arun Pratap   +3 more
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Kinetics of Non‐isothermal Overall Crystallization in Polymer Melts

Crystal Research and Technology, 1991
AbstractA simple formalism describing the non‐isothermal crystallization kinetics in cooling runs at small undercoolings is suggested. A general mathematical method for analyzing processes of non‐isothermal phase formation, accounting for the proper temperature course of the nucleation rate and of the linear growth velocity is developed.
A. Dobreva, I. Gutzow
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Non-isothermal crystallization kinetics of Zr41.2Ti13.8Cu12.5Ni10Be22.5 amorphous alloy

Thermochimica Acta, 2014
Abstract The thermodynamics and kinetics of Zr 41.2 Ti 13.8 Cu 12.5 Ni 10 Be 22.5 amorphous alloy under non-isothermal condition were evaluated using differential scanning calorimetry (DSC). The first and third exothermic events at the heating rates of 5 K/min and 10 K/min split into two peaks.
Sirui Cheng, Chunju Wang, Mingzhen Ma, Debin Shan, Bin Guo   +4 more
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Non-isothermal crystallization kinetics of GeTe4 infrared glass

Journal of Thermal Analysis and Calorimetry, 2015
Non-isothermal crystallization kinetics of the GeTe4 chalcogenide glass was studied in dependence on particle size. Complexity of the obtained DSC data was treated by means of the Fraser–Suzuki deconvolution, and the particular crystallization sub-processes were identified and described in terms of the JMA(2) and AC kinetic models.
Roman Svoboda, Daniela Brandová, Jiří Málek   +2 more
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Non-isothermal crystallization kinetics of iPP/sPP blends

Thermochimica Acta, 2009
Abstract Non-isothermal crystallization and subsequent melting behaviour of iPP/sPP blends of various compositions were investigated by differential scanning calorimetry (DSC). Results revealed that sPP crystallizes at a slower rate than iPP. This effect is attenuated when the cooling rate is increased up to 20 °C/min and 25 °C/min.
Louis Garnier, Sophie Duquesne, Serge Bourbigot, René Delobel   +3 more
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Evaluation of crystallization kinetics of glasses by non-isothermal analysis

Journal of Materials Science, 2001
Based on Johnson-Mehl-Avrami transition equation, this paper proposes a new non-isothermal method for evaluating the crystallization kinetics of glasses. An equation relating the kinetic parameters of the crystallization activation energy, E, and the frequency factor, v, to the inflection-point temperature, Tf, and the heating rate, β, of differential ...
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Non-isothermal crystallization kinetics of La2CaB10O19 from glass

Journal of Non-Crystalline Solids, 2011
Abstract The non-isothermal crystallization kinetics of La2CaB10O19 (LCB) from a La2O3–CaO–B2O3 glass was studied. Differential thermal analysis methods were performed on three glass powders to obtain the kinetic parameters of LCB crystallization mechanism.
I. Dyamant, E. Korin, J. Hormadaly
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Kinetics of non-isothermal crystallization of some fluorozirconate glasses

Thermochimica Acta, 1985
Abstract The non-isothermal crystallization kinetics of ZrF4BaF2 and ZrF4BaF2NaFAlF3 glasses was studied on the basis of the method for determining the activation energy for crystal growth from DSC curves of various heating rates. It was found that the rate of crystal growth in ZrF4BaF2 glasses was shown to be controlled by viscosity of glasses ...
Kazumasa Matusita, Kiyotaka Miura, Takayuki Komatsu   +2 more
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