Mécanisme de diffusion des ions argent dans les macrocristaux de bromure d’argent

Abstract

Measurements of diffusion coefficients and conductivity at room temperature have been made on three different macrocrystals of pure silver bromide by the radioactive tracer and sectioning method.
The values of the correlation factors obtained by comparison of the observed diffusion coefficients with those calculated from the conductivity show that interstitialcy migration seems to be predominant at room temperature in large crystals of pure AgBr.
An avarage value of D = 2.7 × 10^-12 cm²/sec and a correlation factor of about 0.60 have been found on three different samples of AgBr crystals showing that the observed diffusion mechanism does not seem to be very structure sensitive at room temperature.