Stability of Diffusion Profiles in quasi‐binary Solid Solutions (Ag, Na)Cl

Schimschal‐Thölke, S.; Schmalzried, H.; Martin, Manfred

doi:10.1002/bbpc.19950990103

Cited by 6 publications

(6 citation statements)

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“…With these experimental results, we may formulate the fol- Cross-section of the interdiffusion zone between AgCl (bright) and NaCl (dark) in an electric field (T = 523 K, t = 14 h, electric field = 720 V/mm, bottom: anode, top: cathode). The micrograph was taken in a scanning electron microscope [40].…”

Section: Discussionmentioning

confidence: 99%

“…In the solid solution, (Ag 1-x Na x )Cl, σ decreases exponentially with the composition x [39]. Experiments were performed in the same way as before with an electrochemical cell +/Ag/AgCl/NaCl/Ag/- [40]. However, in contrast to the previous experiment, we have now a combination of two effects, interdiffusion of Ag + and Na + , and drift in the externally applied electric potential gradient.…”

Section: Instability Of Diffusion Fronts In Electric Fieldsmentioning

confidence: 99%

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Materials in thermodynamic potential gradients

Martin

2003

The Journal of Chemical Thermodynamics

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In materials that are exposed to thermodynamic potential gradients (i.e., gradients of chemical potentials, electrical potential, temperature, or pressure), transport processes of the mobile components occur. These transport processes and the coupling between different processes are not only of fundamental interest, but are also the origin of degradation processes, such as kinetic demixing and decomposition and changes in the morphology of the material, all of which are of great practical relevance. Two classes of materials will be considered: semi-and ion-conducting oxides and ion-conducting halides. In oxides, kinetic demixing of the cations in a multicomponent oxide and kinetic decomposition of the oxide under the influence of an applied thermodynamic potential gradient will be considered for homovalent oxide solid solutions and for heterovalently doped oxides. In ion-conducting halides, the morphological stability of solid/solid interfaces, which are driven by an external electrical potential gradient, is studied. Monte Carlo simulations show that the morphological stability of the interface is determined by the difference in the ionic conductivities of the two crystals.

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Section: Discussionmentioning

confidence: 99%

Section: Instability Of Diffusion Fronts In Electric Fieldsmentioning

confidence: 99%

Materials in thermodynamic potential gradients

Martin

2003

The Journal of Chemical Thermodynamics

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“…A different experiment is related to the shift of an interface between two (virtually) immiscible ionic crystals the matter fluxes of which are driven by an electric field [38] (see Fig. 14).…”

Section: Morphological Questionsmentioning

confidence: 99%

“…the AgCllKCl phase boundary in the electric field-driven transport coupfe[38]. The optical micrograph shows AgC1-dendrites grown into KCl (T=290°C, t=42 h)…”

mentioning

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Chemical kinetics of phase boundaries in solids

Schmalzried

Janek

1998

Ber Bunsenges Phys Chem

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The kinetics of solid/solid interfaces is of major importance for the course of heterogeneous reactions in the solid state. Solid/solid interfaces are normally sources of elastic stress and thus may interact with outer surfaces. In addition, they can offer high diffusivity paths and thus represent two‐dimensional reaction media. Essential kinetic situations are defined and basic formal considerations are summarized. Corresponding experimental examples are presented in order to illustrate kinetic phenomena at static and moving boundaries. This includes questions of exchange fluxes, boundary‐controlled solid state reactions, morphology, nonlinear phenomena and reactions in boundaries.

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“…2003 IUPAC, Pure and Applied Chemistry 75, 889-903Materials in thermodynamic potential gradients 901 Cross-section of the interdiffusion zone between AgCl (bright) and NaCl (dark) in an electric field (T = 523 K, t = 14 h, electric field = 720 V/mm, bottom: anode, top: cathode). The micrograph was taken in a scanning electron microscope[40].…”

mentioning

confidence: 99%

Materials in thermodynamic potential gradients

Martin

2003

Pure and Applied Chemistry

Self Cite

View full text Add to dashboard Cite

In materials that are exposed to thermodynamic potential gradients (i.e., gradients of chemical potentials, electrical potential, temperature, or pressure), transport processes of the mobile components occur. These transport processes and the coupling between different processes are not only of fundamental interest, but are also the origin of degradation processes, such as kinetic demixing and decomposition and changes in the morphology of the material, all of which are of great practical relevance.Two classes of materials will be considered: semi-and ion-conducting oxides and ion-conducting halides. In oxides, kinetic demixing of the cations in a multicomponent oxide and kinetic decomposition of the oxide under the influence of an applied thermodynamic potential gradient will be considered for homovalent oxide solid solutions and for heterovalently doped oxides. In ion-conducting halides, the morphological stability of solid/solid interfaces, which are driven by an external electrical potential gradient, is studied. Monte Carlo simulations show that the morphological stability of the interface is determined by the difference in the ionic conductivities of the two crystals.

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Stability of Diffusion Profiles in quasi‐binary Solid Solutions (Ag, Na)Cl

Cited by 6 publications

References 6 publications

Materials in thermodynamic potential gradients

Materials in thermodynamic potential gradients

Chemical kinetics of phase boundaries in solids

Materials in thermodynamic potential gradients

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