Szczegóły publikacji
Opis bibliograficzny
Chemical diffusion in molybdenum disulphide / M. POTOCZEK, K. PRZYBYLSKI, M. RĘKAS // Journal of Physics and Chemistry of Solids ; ISSN 0022-3697. — 2007 — vol. 68 iss. 4, s. 564–569. — Bibliogr. s. 568–569, Abstr. — Publikacja dostępna online od: 2007-02-02
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 32949 |
|---|---|
| Data dodania do BaDAP | 2007-05-18 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.jpcs.2007.01.029 |
| Rok publikacji | 2007 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Physics and Chemistry of Solids |
Abstract
Ceramic molybdenum disulphide (MoS2) was equilibrated at an ambient sulphur vapour partial pressure p(S-2) 10 Pa < P(S-2) < 1000 Pa. After the step change of p(S-2) to a new value, the equilibration kinetics was monitored by measuring electrical conductivity. The application of the solution of Fick's second law (with the initial condition: no concentration gradient in specimen and the boundary condition: surface concentration constant) to the kinetic data gave the chemical diffusion coefficient. The chemical diffusion coefficient, D-chem determined at 1273 K, was D-chem, = (3.20 +/- 0.32)* 10(-7) cm(2) s(-1) and was found to be independent of sulphur vapour partial pressure. The usefulness of transient electrical conductivity method for determining real values of diffusion data was discussed in terms of defect structure of the studied material. (c) 2007 Elsevier Ltd. All rights reserved.