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Diffusion–evaporation method in studying self-diffusion in metal oxides and sulphides

Authors
Journal
Solid State Ionics
0167-2738
Publisher
Elsevier
Publication Date
Volume
129
Identifiers
DOI: 10.1016/s0167-2738(99)00316-1
Keywords
  • Diffusion
  • Metal Evaporation
  • Mn Self-Diffusion In Mn1+ Ys

Abstract

Abstract The diffusion–evaporation method, developed several years ago by Kofstad is shortly discussed with the background of experimental results obtained on the Mn–MnS system from evaporation kinetics and radioactive tracer experiments. Excellent agreement between self-diffusion coefficients of cations in Mn 1+ y S determined experimentally and those calculated from evaporation rate measurements clearly indicates that this novel fascinating method can successfully be utilized in studying the transport properties of transition metal oxides and sulphides in equilibrium with the metallic phase. A notable feature of this method is that diffusional transport is studied under carbon- (and hydrogen-) free conditions, while in conventional, much more difficult, tracer experiments CO–CO 2 or H 2−H 2O (H 2–H 2S) gas mixtures must be used in order to obtain such low oxidant activities.

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