Results 201 to 210 of about 11,127,655 (242)
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Modeling of Non-Isothermal Crystallization Kinetics of Isotactic Polypropylene
Polymer, 2001Isothermal and non-isothermal melt crystallization kinetics of isotactic polypropylene (iPP) were investigated via differential scanning calorimetry (DSC). Isothermal melt crystallization kinetics were analyzed using the Avrami equation. An Avrami exponent close to three was obtained for iPP, which implies growth of three-dimensional spherulitic ...
Yousef Mubarak +2 more
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Kinetics of non-isothermal crystallization
Polymer, 1971Abstract Non-isothermal kinetics of the process of nucleation and its growth are derived by extending Avrami's equation. Kinetic analysis of the thermoanalytical data of the process is also described and applied to DSC curves of crystallization obtained by cooling poly(ethylene terephthalate) at constant rates.
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Non-isothermal crystallization kinetics of FeZrB amorphous alloy
Thermochimica Acta, 2011Abstract The non-isothermal crystallization kinetics of amorphous Fe 78 Zr 7 B 15 alloy is investigated to shed light on the crystallization mechanism. The crystallization of amorphous Fe 78 Zr 7 B 15 alloy exhibits two distinct steps. The apparent activation energy of the first ( E a 1 ) and second step crystallization ( E a 2 ) are determined
L.H. Kong +4 more
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A study of the non-isothermal crystallization kinetic of Zn10Se90 glass
Applied Physics A, 2015The glass transition and the crystallization kinetics of Zn10Se90 glass by differential thermal analysis (DTA) technique under non-isothermal conduction were studied. The effective activation energies of the glass transition and the crystallization have been evaluated on the basses of the Kissinger and Matusita et al. approximations. Kinetic parameters
M. A. Abdel-Rahim +4 more
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Non-isothermal crystallization kinetics for CaO–Fe2O3 system
Journal of Thermal Analysis and Calorimetry, 2015The CaO–Fe2O3 system is the most significant liquid phase for fluxed sinter. However, the crystallization kinetics of CaO·Fe2O3 (CF), which directly contributes to the physical and metallurgical properties of sinter, is rarely reported. In this study, the crystallization kinetics of CaO·Fe2O3 system was analyzed using the mean of non-isothermal ...
Chengyi Ding +3 more
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Kinetics of non-isothermal crystallization in FeNiPC(Nb) alloys
Thermochimica Acta, 2020Abstract The effects of minor Nb addition on the crystallization mechanism for a FeNiPC(Nb) amorphous alloy were studied via investigating its non-isothermal crystallization kinetics. With minor Nb addition, the thermal stability of the alloy increases as evidenced by the enlargement of the supercooled liquid region.
S.S. Jiang, L. Zhu, H. Zheng, Y.G. Wang
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Kinetics of non‐isothermal sorption in molecular sieve crystals
AIChE Journal, 1980AbstractA mathematical model is developed to describe non‐isothermal sorption kinetics and used to interpret experimental uptake curves for CO2 in 4A zeolite and for CO2 and in C5H12 in 5A zeolite. The model assumes that the dominant mass transfer resistance is intracrystalline diffusion while the major resistance to heat transfer is the external heat ...
Douglas M. Ruthven +2 more
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The non-isothermal crystallization kinetics and mechanism of FeGaGeBCu alloy
Journal of Non-Crystalline Solids, 2022Abstract In this paper, Fe76Ga5Ge5B13Cu1 ribbon was prepared by melt spinning method and its thermal stability and non-isothermal crystallization kinetics were analyzed. It is found that the primary crystallization phase is α-Fe(Ga,Ge), following by the precipitation of Fe-B compounds.
Lu Guo +4 more
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Non-isothermal crystallization kinetics of kaolin modified polyester
Journal of Wuhan University of Technology-Mater. Sci. Ed., 2011Fiber-class modified kaolin and PET have been blended in the twin-screw and granulated to chips containing 4 wt% of kaolin. Non-isothermal crystallization process of kaolin modified polyester was investigated using a differential scanning calorimetry (DSC), and the addition of kaolin enhances either the melting temperature (Tm) or the crystallization ...
Ruixin Zhang, Mingbo Gu, Guoqiang Chen
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Crystallization kinetics of SrBi2B2O7 glasses by non-isothermal methods
Journal of Thermal Analysis and Calorimetry, 2009Transparent glasses of SrBi2B2O7 (SBBO) were fabricated via the conventional melt-quenching technique. The amorphous and the glassy nature of the as-quenched samples were, respectively, confirmed by X-ray powder diffraction (XRD) and differential scanning calorimetry (DSC).
Majhi, Koushik, Varma, KBR
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