Estimation of hole conductivity of AgI through tarnishing studies of silver in iodine vapour at about room temperature

Bose, Saswata; Sircar, S. C.

doi:10.1007/bf00541084

Cited by 10 publications

(1 citation statement)

References 42 publications

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“…by differentiation of the above equation from the knowledge of pressure dependence of the rate constant. Similar procedures have been successfully used by Sircar et al (20) (21) for estimation of hole conductivity and ionic conductivity in AgI and Cul films, respectively, starting with the In these procedures the following points are important. The above equation consists of two terms.…”

Section: Effect Of Impressed Currentmentioning

confidence: 99%

Influence of Impressed D.C. Currents and Short-Circuiting on the Oxidation of Iron to Wüstite in CO–CO<SUB>2</SUB> Gas Mixtures at 973 to 1123 K

1985

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The present study reports the results of investigation on the effects of impressed d.c. current on the growth of FeO layer on iron. The atmosphere and the temperature range of study chosen were CO-CO2 gas mixtures and from 973 to 1123K. Except for the initial part, the kinetics of FeO layer growth under normal oxidation, under impressed current of both the polarities and under short-circuited condition followed the parabolic growth law. Under cathodic condition of the sample as well as under short-circuited condition, the rates were found to be more than that under normal oxidation condition. Decrease in oxidation rate was observed during the later part of oxidation, when the iron sample was made anodic. However, at lower temperatures, 973K and 1023K, the rates were found to be more than that under normal oxidation condition. The results have been qualitatively interpreted on the basis of expected changes in situations with regard to defect concentrations at the metal/oxide and oxide/gas interfaces as well as on the basis of changed transport coefficient of defects through the FeO layer. A thermogravimetric method was employed for following up the kinetics. A new method of field application was used.

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Section: Effect Of Impressed Currentmentioning

confidence: 99%

Influence of Impressed D.C. Currents and Short-Circuiting on the Oxidation of Iron to Wüstite in CO–CO<SUB>2</SUB> Gas Mixtures at 973 to 1123 K

1985

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Über das Wachstum von Iodidschichten auf Silber‐ und Kupferunterlagen durch simultane Kondensation und Reaktion

Pittermann

Weil

1980

Ber Bunsenges Phys Chem

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Die durch freie Verdampfung von Silber‐ und Kupferiodid erzeugten Dämpfe weisen erheblich höhere Iodanteile auf als die entsprechenden Gleichgewichtsdämpfe. Auf Silber‐ und Kupferunterlagen von Raumtemperatur wachsen in diesen Dämpfen Iodidschichten durch simultane Iodidkondensation und Reaktion der Unterlage mit Iod. Es werden Meßverfahren angegeben, mit denen die zeitlichen Verläufe und die Anteile beider Prozesse erfaßt werden können. Das Zeitgesetz des Schichtwachstums und die Abhängigkeit der kinetischen Parameter der Kondensation und Reaktion von den Aufdampfbedingungen zeigen, daß der Mechanismus eine unabhängige Überlagerung der beiden Einzelprozesse ist. Durch Vergleich der Stoffströme, die aus Gleichgewichtsdrücken berechnet werden, mit den aus den Kondensationsraten berechneten, können Verdampfungskoeffizienten abgeschätzt werden. Sie sind kleiner als 10−1.

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Interfacial Electrostatics and Electrodynamics in Disperse Systems

Leeuwen

Lyklema

1986

Modern Aspects of Electrochemistry

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Estimation of hole conductivity of AgI through tarnishing studies of silver in iodine vapour at about room temperature

Cited by 10 publications

References 42 publications

Influence of Impressed D.C. Currents and Short-Circuiting on the Oxidation of Iron to Wüstite in CO–CO<SUB>2</SUB> Gas Mixtures at 973 to 1123 K

Influence of Impressed D.C. Currents and Short-Circuiting on the Oxidation of Iron to Wüstite in CO–CO<SUB>2</SUB> Gas Mixtures at 973 to 1123 K

Über das Wachstum von Iodidschichten auf Silber‐ und Kupferunterlagen durch simultane Kondensation und Reaktion

Interfacial Electrostatics and Electrodynamics in Disperse Systems

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Estimation of hole conductivity of AgI through tarnishing studies of silver in iodine vapour at about room temperature

Cited by 10 publications

References 42 publications

Influence of Impressed D.C. Currents and Short-Circuiting on the Oxidation of Iron to W&uuml;stite in CO&ndash;CO<SUB>2</SUB> Gas Mixtures at 973 to 1123 K

Influence of Impressed D.C. Currents and Short-Circuiting on the Oxidation of Iron to W&uuml;stite in CO&ndash;CO<SUB>2</SUB> Gas Mixtures at 973 to 1123 K

Über das Wachstum von Iodidschichten auf Silber‐ und Kupferunterlagen durch simultane Kondensation und Reaktion

Interfacial Electrostatics and Electrodynamics in Disperse Systems

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Resources

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Influence of Impressed D.C. Currents and Short-Circuiting on the Oxidation of Iron to Wüstite in CO–CO<SUB>2</SUB> Gas Mixtures at 973 to 1123 K

Influence of Impressed D.C. Currents and Short-Circuiting on the Oxidation of Iron to Wüstite in CO–CO<SUB>2</SUB> Gas Mixtures at 973 to 1123 K