scholarly journals Determining the Diffusion Coefficient of Lithium Insertion Cathodes from GITT measurements: Theoretical Analysis for low Temperatures

ChemPhysChem ◽  
2021 ◽  
Author(s):  
Thomas Schied ◽  
Alexander Nickol ◽  
Christian Heubner ◽  
Michael Schneider ◽  
Alexander Michaelis ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Theoretical Analysis ◽  
Low Temperatures ◽  
Lithium Insertion

SPIN DIFFUSION COEFFICIENT OF A1-PHASE OF SUPERFLUID 3He AT LOW TEMPERATURES

2009 ◽  
Vol 23 (12) ◽  
pp. 1603-1610 ◽  
Author(s):  
R. AFZALI ◽  
F. PASHAEE
Keyword(s):  
Diffusion Coefficient ◽  
Boltzmann Equation ◽  
Low Temperatures ◽  
Spin Diffusion ◽  
Superfluid 3He ◽  
Total Spin ◽  
Equation Approach ◽  
Fluid Component ◽  
Melting Pressure ◽  
Superfluid Component

The spin diffusion coefficient tensor of the A1-phase of superfluid 3 He at low temperatures and melting pressure is calculated using the Boltzmann equation approach and Pfitzner procedure. Then considering Bogoliubov-normal interaction, we show that the total spin diffusion is proportional to 1/T2, the spin diffusion coefficient of superfluid component [Formula: see text] is proportional to T-2, and the spin diffusion coefficient of super-fluid component [Formula: see text] is independent of temperature. Furthermore, it is seen that superfluid components play an important role in spin diffusion of the A1-phase.

Measuring the mutual gas diffusion coefficient at low temperatures

1970 ◽  
Vol 19 (5) ◽  
pp. 1451-1453 ◽  
Author(s):  
P. E. Suetin ◽  
A. E. Loiko ◽  
B. A. Kalinin ◽  
Yu. F. Gerasimov
Keyword(s):  
Diffusion Coefficient ◽  
Low Temperatures ◽  
Gas Diffusion

Combined effect of repeated loads and low temperatures on asphalt pavements

1994 ◽  
Vol 21 (4) ◽  
pp. 674-681 ◽  
Author(s):  
Yingwu Fang ◽  
Michel Sargious
Keyword(s):  
Theoretical Analysis ◽  
Asphalt Concrete ◽  
Low Temperatures ◽  
Laboratory Tests ◽  
Combined Effect ◽  
Asphalt Pavements ◽  
Recycled Asphalt ◽  
Concrete Mix ◽  
New Material ◽  
Vehicle Loads

This research was undertaken to study the combined effect of repeated vehicle loads and low temperatures on the design thickness for both recycled and virgin asphalt pavements. It included three parts of work: theoretical analysis, laboratory tests, and computation. In the theoretical analysis, the finite layer method was used instead of the conventional layered theory to obtain the relationship between vehicle loads and the mechanical parameters in the pavement layers. In the laboratory tests, the behaviour of a recycled asphalt concrete mix consisting of 42% reclaimed and 58% new material was compared with that of a virgin asphalt concrete mix of similar characteristics. Finally, a computer program FPAVE was developed to determine the pavement thicknesses directly and conveniently. These thicknesses were then plotted in the form of curves for comparing the two types of pavements as well as for comparison with the thickness at 22 °C. Key words: asphalt pavement, fatigue, pavement design, recycling, temperature.

Tracer Impurity Diffusion in Liquid Metals: Au in Ga

1974 ◽  
Vol 29 (6) ◽  
pp. 959-960 ◽  
Author(s):  
P.-E. Eriksson ◽  
S. J. Larsson
Keyword(s):  
Activation Energy ◽  
Diffusion Coefficient ◽  
Low Temperatures ◽  
Arrhenius Plot ◽  
Liquid Metals ◽  
Impurity Diffusion ◽  
Straight Line ◽  
Linear Plot

The diffusion coefficient of 198Au in liquid Ga has been measured between 35 and 460 °C. The results can be represented by a linear plot of D vs T or by an Arrhenius plot. The latter yields the parameters D0 = 4.9·10-4 cm2/s and Q = 2.65 kcal/mol. However, some distinct departures from the straight line characteristics, showing a considerably higher “activation energy” at the low temperatures, suggest the possibility that clusters composed of two or several atoms may partake in diffusion.

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