scholarly journals A new high-temperature multinuclear-magnetic-resonance probe and the self-diffusion of light and heavy water in sub- and supercritical conditions

2005 ◽  
Vol 123 (16) ◽  
pp. 164506 ◽  
Author(s):  
Ken Yoshida ◽  
Chihiro Wakai ◽  
Nobuyuki Matubayasi ◽  
Masaru Nakahara
Keyword(s):  
High Temperature ◽  
Magnetic Resonance ◽  
Heavy Water ◽  
The Self ◽  
Supercritical Conditions ◽  
Self Diffusion ◽  
Multinuclear Magnetic Resonance

From the Mystery to the Understanding of the Self-Interstitials in Silicon

1980 ◽  
Vol 2 ◽  
Author(s):  
W. Frank ◽  
A. Seeger ◽  
U. Gösele
Keyword(s):  
High Temperature ◽  
The Self ◽  
Experimental Conditions ◽  
Group V ◽  
Group Iii ◽  
Enhanced Diffusion ◽  
Self Diffusion ◽  
Thermally Activated ◽  
Temperature Equilibrium ◽  
K Concentration

ABSTRACTOur present knowledge on self-interstitials in silicon and the rôle these defects play under widely different experimental conditions are surveyed. In particular, the following phenomena involving self-interstitials either in supersaturations or under high-temperature thermal-equilibrium conditions are considered: mobility-enhanced diffusion of self-interstitials below liquid-helium temperature, thermally activated diffusion of self-interstitials at inter-mediate temperatures (14O K to 600 K), concentration-enhanced diffusion of Group-III or Group-V elements in silicon at higher temperatures, and— as examples for high-temperature equilibrium phenomena — self-diffusion and diffusion of gold in silicon. This leads to the picture that the self-interstitials in silicon may occur in different electrical charge states and possess dumbbell configurations or are extended over several atomic volumes at intermediate or high temperatures, respectively.

High temperature oxidation of ion-plated CrN films

1994 ◽  
Vol 9 (1) ◽  
pp. 151-155 ◽  
Author(s):  
Hiroshi Ichimura ◽  
Atsuo Kawana
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Mass Gain ◽  
The Self ◽  
Temperature Oxidation ◽  
Outward Diffusion ◽  
Ion Plating ◽  
Self Diffusion ◽  
Steel Substrates ◽  
Self Diffusion Coefficient

The high-temperature oxidation of CrN films which were deposited onto stainless steel substrates using an arc ion plating apparatus was studied at temperatures ranging from 1023 to 1173 K for 0.6 to 480 ks in air. The oxidation rate obtained from mass gain as a function of time was found to fit well to a parabolic time dependence. Formed oxide layers were analyzed by XRD, SEM, and SAM. An activation energy of the oxidation of CrN was slightly lower than that of the self-diffusion coefficient of Cr ion in Cr2O3. It is concluded that the oxidation of CrN is controlled by the outward diffusion of Cr ions through the Cr2O3 layer formed on each CrN grain.

Diffusionskonstanten einiger organischer Flüssigkeiten

1970 ◽  
Vol 25 (5) ◽  
pp. 777-780 ◽  
Author(s):  
Gottfried J. Krüger ◽  
Rene Weiss
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Acetic Acid ◽  
Magnetic Resonance ◽  
Diffusion Coefficients ◽  
Spin Echo ◽  
The Self ◽  
Self Diffusion ◽  
Resonance Spin ◽  
Nuclear Magnetic

The self diffusion coefficients of acetone, ethanol, diethoxymethane, diethylether, diglycole-dimethylether, 1,2-dimethoxyethane, acetic acid, methyliodide, tetrahydrofuran, toluene, trimethylphosphite, and 1,3,5-trifluorobenzene have been measured in dependence on temperature using nuclear magnetic resonance spin echo techniques.

Seif Diffusion of Liquid 6Li and 7Li as Measured by Nuclear Magnetic Resonance

1971 ◽  
Vol 26 (1) ◽  
pp. 94-98 ◽  
Author(s):  
G. J. Krüger ◽  
W. Müller-Warmuth ◽  
A. Klemm
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Diffusion Coefficients ◽  
Spin Echo ◽  
Absolute Measurement ◽  
The Self ◽  
Square Root ◽  
Mass Ratio ◽  
Experimental Procedure ◽  
Self Diffusion

Abstract The self-diffusion coefficients of liquid 6Li and 7Li have been measured using NMR spin echo techniques with pulsed gradients. In the experimental procedure, and in the sample preparation, particular attention has been paid to a relative, rather than to an absolute measurement. At 190 °C, the ratio of the self-diffusion coefficients is found to be D6 (x6 = 1) / D7 (x7 = 1) = 1.09 ± 0.06, in agree­ment with the square root of the mass ratio (m7-m6)1/2 = 1.08. In an atomic mixture of 80% 6Li and 20% 7Li, D6 (x6 = 0.8)/D7 (x6 = 0.8) = 1.0 3 ± 0.08 has been obtained

Temperature Dependence of the Self-Diffusion of Supercooled Heavy Water to 244 K

2000 ◽  
Vol 104 (25) ◽  
pp. 5874-5876 ◽  
Author(s):  
William S. Price ◽  
Hiroyuki Ide ◽  
Yoji Arata ◽  
Olle Söderman
Keyword(s):  
Temperature Dependence ◽  
Heavy Water ◽  
The Self ◽  
Self Diffusion
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