EMF Measurements on the Thermocell Ag(T1)/AgI/Ag(T2)
Year: 1975
Type: article
Abstract: Thermal emf measurements have been carried out on AgI using reversible silver electrodes be-tween 75° and 300 °C. A sharp change in the magnitude of the thermoelectric power (Θ) has been observed at 146 °C corresponding to the β to a phase transition. The results may be represented by the equations β-AgI: θ =- [(0.351 ±0.032) (103/T)+0.203 ± 0.083]mV/K, 70-146 °C, a-AgI: θ =- [(0.052 ± 0.011) (103/T)+0.531 ± 0.031]mV/K, 146-300 °C. From these the heats of transport of the Ag+ interstitials and ions respectively in the two phases have been calculated to be (0.351-h/2), h being the heat of formation of a Frenkel defect pair in β-AgI, and 0.052 eV, whereas the activation energies for conduction are 0.38 and 0.051 eV respectively. These results are compared with those of previous authors.
Source: Zeitschrift für Naturforschung A
Authors: K. Shahi, S. Chandra
Institution: Deen Dayal Upadhyaya Gorakhpur University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,712
OpenAlex ID: W2134007746