It was recalled that an extremely non-Arrhenius dependence of the conductivity was observed in optimized fast ion conducting glasses. Even when all of the chemical factors which governed the ionic conductivity had been optimized, the conductivity failed to reach the expected values of more than 0.1S/cm at 298K. A new series of glasses of the form, xAgI + (1-x)[0.525Ag2S + 0.475B2S3:SiS2], was studied here for the first time and was found to exhibit a non-Arrhenius conductivity whose extent increased with the AgI content (table 4). This behavior was believed to be a new feature of optimized fast ion conducting glasses, and would have to be overcome if the conductivity of such systems was to reach the desired levels.

J.Kines, S.W.Martin: Physical Review Letters, 1996, 76[1], 70-3

 

 

 

Table 4

Conductivity Parameters of (1-x)[0.525Ag2S + 0.475B2S3:SiS2]-xAgI Glasses

 

 

x

 

Activation Energy (eV)

 

Conductivity at 298K (S/cm)

 

 

0

 

0.33

 

0.0010

0.1

0.32

0.002

0.2

0.31

0.003

0.3

0.28

0.004

0.4

0.25

0.006