The diffusivity of Ag in glass samples (table 187) was studied by using tracer and sectioning techniques. It was found that the activation energy for diffusion decreased with increasing AgI concentration. At concentrations of between 12 and 40mol%AgI, it was essentially the same as that for conduction. At higher AgI concentrations, the activation energy for diffusion became larger than that for conduction.

J.G.Vlasov, E.A.Bychkov, A.V.Legin, M.M.Daved: Elektrokhimiya, 1991, 27[11], 1432-9 (Soviet Electrochemistry, 1991, 27[11], 1266-73)

 

Table 187

Diffusion Parameters for AgI-PbS-As2S3 Glasses

 

AgI (mol%)

Do (cm2/s)

Q (eV)

12

1.91 x 10-15

0.76

30

1.29 x 10-12

0.59

35

4.27 x 10-11

0.50

40

1.26 x 10-10

0.49

50

5.01 x 10-9

0.43

53.6

3.98 x 10-9

0.36

60

2.82 x 10-8

0.31

64

3.09 x 10-8

0.34