Conduction enhancement in solid silver bromide by heterogeneous doping with montmorillonite

The ionic conductivity of AgBr-montmorillonite composites from 0.9 to 30 vo lume percent in montmorillonite was studied in the range from 20 to 410 deg reesC. A remarkable increase in the conductivity at low temperatures is fou nd. At 20 degreesC a maximum value about 45 times higher than that of pure AgBr is reached at 2.6 v/o. A noticeable effect of humidity is also found. The results are qualitatively explained on the basis of the model proposed by Maier for heterogeneous doping of solid electrolytes. (C) 2001 Elsevier Science B.V. All rights reserved.