Microscopic model of intergrain boundary junction
| Autor: | George Bokun, Antanas Feliksas Orliukas, Vyacheslav S. Vikhrenko, Tomas Šalkus |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Condensed matter physics
Chemistry chemical capacitance diffusion Boundary (topology) General Medicine Statistical mechanics impedance spectra intergrain boundaries microscopic model Ion Electrical resistivity and conductivity visual_art visual_art.visual_art_medium Particle Grain boundary Ceramic Diffusion (business) Engineering(all) |
| Zdroj: | Procedia Engineering, Amsterdam : Elsevier Science B.V., 2014, Vol. 98, p. 111-114 |
| ISSN: | 1877-7058 |
| Popis: | The statistical mechanics differential-difference equations for the ions concentration distribution that account for the diffusion, electrical conductivity and Poisson contributions are derived. They represent differential-difference analogues of the phenomenological continuity equations for the ions. Spatial inhomogeneities (grain interiors, grain boundaries, intergrain regions, etc.) can easily be taken into account by proper adjusting the system material parameters (diffusion coefficients or particle transition rates, electric conductivities, thermodynamic factors or chemical capacitances). The solution of the equations allows investigating impedance spectra of inhomogeneous systems, e. g. electro-conducting ceramics. The results can be used for interpretation of experimental impedance spectra and evaluation of the medium transport characteristics. A simple example of the intergrain boundary junction is considered. |
| Databáze: | OpenAIRE |
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