Journal ArticleDOI
Determination of Diffusion Coefficients
B. Serin,R. T. Ellickson +1 more
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In this article, the diffusion equations derived from Fick's law were applied to experimental data in the literature on the diffusion of oxygen in copper and on reaction rates for chemical reactions in the solid phase.Abstract:
Diffusion equations derived from Fick's law are discussed and applied to experimental data in the literature on the diffusion of oxygen in copper and on reaction rates for chemical reactions in the solid phase. Previous limitations on the applicability of the formulae are removed by the use of a simple graphical method so that the theory can be applied to data to which it was previously inapplicable. It is pointed out that the exact solution to Fick's law obtained is equivalent to the parabolic law in the early stages of the diffusion process. The activation energy for the diffusion of oxygen in copper is found to be 50.5 kcal. per g‐atom.read more
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Thermal decomposition of inclusion compounds on the base of the metal–organic framework [Zn 4 (dmf)(ur) 2 (ndc) 4 ]
Vladimir A. Logvinenko,Vladimir A. Logvinenko,Sergey A. Sapchenko,Sergey A. Sapchenko,Vladimir P. Fedin,Vladimir P. Fedin +5 more
TL;DR: In this article, the kinetic stability of two inclusion compounds on the base of a new metal-organic framework (MOF) was studied, and it was shown that the inclusion compound with benzene is more stable than the compound with toluene.
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Effects of Additives on Solid State Reaction. III. Effects of Halide Additives on the Formation of MgFe2O4
TL;DR: In this article, the promoting effects of halide additives on the formation of MgFe2O4 have been studied on the basis of both kinetic and thermoanalytical data.
Journal ArticleDOI
A Study on CO2 Diffusion Coefficient in n-decane Saturated Porous Media by MRI☆
Ying Teng,Yu Liu,Yongchen Song,Lanlan Jiang,Yuechao Zhao,Xinhuan Zhou,Hongfei Zheng,Junlin Chen +7 more
TL;DR: In this paper, an in-depth analysis on the related parameters which affect the diffusion process of CO 2 in n-decanesaturated porous media was conducted, and the results showed that the diffusion coefficient increased as the pressure increased, also the diffusion coefficients were influenced by parameters including porethroatstructure, diameter of glass sands and so on.
Journal ArticleDOI
The sintering of activated CaO
TL;DR: The sintering of CaO has been investigated from oxides of different "activity" resulting from the decomposition of CaCO3 at 1000 c or Ca(OH)2 between 600 and 1000 c as discussed by the authors.
Journal ArticleDOI
Kinetic model applicable to synthesis of (Cu0·25 N0·25 Zn0·5 )Fe2O4 ferrite
TL;DR: In this article, the effect of synthesis temperature on the ferrite formation rate was determined by means of high temperature X-ray diffractometry (HT-XRD), based on the hypothesis that diffusion through the product layer is the rate controlling process step.