CobaltMaghrebV1, France, Analysis, bibRecord, 000490

Magnesium impurity diffusion in Co1− x O single crystals

Identifieur interne : 000490 ( France/Analysis ); précédent : 000489; suivant : 000491

Magnesium impurity diffusion in Co1− x O single crystals

Auteurs : H. Boussetta ; C. Monty [France]

Source :

Journal of Physics and Chemistry of Solids [ 0022-3697 ] ; 1988.

RBID : ISTEX:D15163A587FACFC02562C482CBE89AF501F99A49

Descripteurs français

Pascal (Inist)
- Autodiffusion, Cobalt Oxyde, Coefficient diffusion, Composition non stoechiométrique, Composé minéral, Défaut ponctuel, Energie activation, Etude expérimentale, Haute température, Hétérodiffusion, Impureté, Lacune, Magnésium, Monocristal, Métal transition Composé, Oxygène, Pression partielle, Profil diffusion, Température.
Wicri :
- topic : Composé minéral, Magnésium, Oxygène.

English descriptors

KwdEn :
- Activation energy, Cobalt Oxides, Diffusion coefficient, Diffusion profile, Experimental study, High temperature, Impurity, Impurity diffusion, Magnesium, Non stoichiometric composition, Oxygen, Partial pressure, Point defect, Self diffusion, Single crystal, Temperature, Transition metal Compounds, Vacancy.

Abstract

The diffusion coefficients for magnesium were measured in Co1−xO single crystals as a function of temperature and oxygen partial pressures in the ranges 1000–1600°C and 10−8−0.21 atm. The results are well represented by the relations Dmg∗(cm2S−1=(1.4±0.5)10−2fxp− 1.95±0.03(eV) kTpO2=0.21atm and T=1000−1600°cDmg∗(cm2S−L)=(4.0±0.4)10−3exp− 2.07±0.03(ev) kTp2=10−5atm and T=1060−1455°Clog D mg∗(cm2S−1)=3.5 10−3(logPO2)2+0.22log pO2−8.4T=1200°C and pO2=10−8−0.21 atm These results show that the influence of the oxygen partial pressure is smaller on Mg impurity diffusion than on Co self-diffusion. This effect has been interpreted as the evidence of a preferential attractive interaction between VCo and Mg impurities.

Url:

https://api.istex.fr/document/D15163A587FACFC02562C482CBE89AF501F99A49/fulltext/pdf

DOI: 10.1016/0022-3697(88)90094-7

Affiliations:

Links to Exploration step

ISTEX:D15163A587FACFC02562C482CBE89AF501F99A49

Le document en format XML

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<term>High temperature</term>
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<term>Impurity diffusion</term>
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<term>Oxygen</term>
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<term>Défaut ponctuel</term>
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<term>Etude expérimentale</term>
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<front><div type="abstract" xml:lang="en">The diffusion coefficients for magnesium were measured in Co1−xO single crystals as a function of temperature and oxygen partial pressures in the ranges 1000–1600°C and 10−8−0.21 atm. The results are well represented by the relations Dmg∗(cm2S−1=(1.4±0.5)10−2fxp− 1.95±0.03(eV) kTpO2=0.21atm and T=1000−1600°cDmg∗(cm2S−L)=(4.0±0.4)10−3exp− 2.07±0.03(ev) kTp2=10−5atm and T=1060−1455°Clog D mg∗(cm2S−1)=3.5 10−3(logPO2)2+0.22log pO2−8.4T=1200°C and pO2=10−8−0.21 atm These results show that the influence of the oxygen partial pressure is smaller on Mg impurity diffusion than on Co self-diffusion. This effect has been interpreted as the evidence of a preferential attractive interaction between VCo and Mg impurities.</div>
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Serveur d'exploration sur le cobalt au Maghreb

Magnesium impurity diffusion in Co1− x O single crystals

Magnesium impurity diffusion in Co1− x O single crystals

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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