Water sorption kinetics in light-cured poly-HEMA and poly(HEMA-co-TEGDMA); determination of the self-diffusion coefficient by new iterative methods

2007 ◽  
Vol 106 (4) ◽  
pp. 2380-2390 ◽  
Author(s):  
Irini D. Sideridou ◽  
Georgios E. Papanastasiou
Keyword(s):  
Diffusion Coefficient ◽  
Iterative Methods ◽  
Water Sorption ◽  
Sorption Kinetics ◽  
The Self ◽  
Self Diffusion ◽  
Self Diffusion Coefficient

Determination of Diffusion Coefficient of Cation Vacancies in Nickel Oxide

1969 ◽  
Vol 24 (3) ◽  
pp. 441-443 ◽  
Author(s):  
Romano Morlotti
Keyword(s):  
Electrical Conductivity ◽  
Diffusion Coefficient ◽  
Nickel Oxide ◽  
Equilibrium Concentration ◽  
The Self ◽  
Self Diffusion ◽  
Partial Pressures ◽  
Self Diffusion Coefficient ◽  
Good Agreement

AbstractPolycrystalline NiO samples were equilibrated with different oxygen partial pressures from 10-3 to 1 Atm in the temperature range 750 °C -1000 °C. Transient electrical conductivity was measured until a new equilibrium was attained after changing the oxygen partial pressure. By the time dependence of the electrical conductivity in isothermal conditions the diffusion coefficient of nickel vacancies was determined. Using the pertinent value for the vacancies equilibrium concentration, the self-diffusion coefficient of nickel in nickel oxide was obtained in good agreement with literature data.

SELF-DIFFUSION OF RUBIDIUM AS INFLUENCED BY SOIL MOISTURE TENSION

1963 ◽  
Vol 43 (1) ◽  
pp. 44-51 ◽  
Author(s):  
A. S. Patil ◽  
K. M. King ◽  
M. H. Miller
Keyword(s):  
Diffusion Coefficient ◽  
Soil Moisture ◽  
Diffusion Coefficients ◽  
The Self ◽  
Self Diffusion ◽  
Steady State Method ◽  
Loam Soil ◽  
Time Periods ◽  
Self Diffusion Coefficient

A non steady-state method was used for the laboratory determination of the self-diffusion coefficient of rubidium in loam soil at soil moisture tensions of.16, 1.17, and 15 atmospheres. Soil volumes (half-cells) 1.0 centimeter long and 2.5 centimeters in diameter, containing rubidium labelled with Rb86, were placed in contact with similar but unlabelled half-cells. After varying time periods, the half-cells were separated and extracted with 1N NH4Ac, and the transfer of Rb86 determined.The diffusion followed the simple theory. The self-diffusion coefficients for rubidium at 25 °C. were as follows: 16 × 10−4 cm.2/hr. at 0.16 atm.; 4.9 × 10−4 cm.2/hr. at 1.17 atm.; 2.3 × 10−4 cm.2/hr. at 15 atm. In free solution, the self-diffusion coefficient is 7.2 × 10−2 cm.2/hr.

Determination of the self-diffusion coefficient of water in ferrierite by molecular dynamics

1988 ◽  
Vol 145 (3) ◽  
pp. 237-241 ◽  
Author(s):  
L. Leherte ◽  
G.C. Lie ◽  
K.N. Swamy ◽  
E. Clementi ◽  
E.G. Derouane ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Diffusion Coefficient ◽  
The Self ◽  
Self Diffusion ◽  
Self Diffusion Coefficient

Determination of the Self-Diffusion Coefficient of Ni2+in La2NiO4+δby the Solid State Reaction Method

2012 ◽  
Vol 159 (6) ◽  
pp. B702-B708 ◽  
Author(s):  
Nebojša Čebašek ◽  
Reidar Haugsrud ◽  
Jovan Milošević ◽  
Zuoan Li ◽  
Jens B. Smith ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
The Self ◽  
Reaction Method ◽  
Self Diffusion ◽  
Self Diffusion Coefficient
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