Conductivity, and conductivity relaxation, of glasses in this system, with LiF contents ranging from 10 to 60mol% (table 214), were investigated at frequencies of 10Hz to 2MHz and temperatures of between 300K and the glass transition temperature. The conductivity went through a minimum, and the activation energy a maximum, at 20mol%LiF. This was attributed to a crossover from F--dominated to Li--dominated conductivity. The glass decoupling index also exhibited a minimum at 20mol%LiF. The conductivity relaxation parameter instead went through a minimum at 30mol%LiF.

M.Sural, A.Ghosh: Journal of Physics - Condensed Matter, 1998, 10[47], 10577-86

 

 

Table 214

Conduction Parameters for ZrF4-BaF2-YF3-LiF Glasses

 

BaF2 (mol%)

YF3 (mol%)

LiF (mol%)

σo (S/cm)

Q (eV)

σ200C (S/cm)

30

10

10

1.2 x 103

0.78

2.54 x 10-6

20

10

20

1.6 x 103

0.85

1.32 x 10-6

20

10

30

7.1 x 103

0.83

6.84 x 10-6

15

10

40

6.2 x 103

0.70

2.45 x 10-5

15

10

50

3.4 x 103

0.70

9.57 x 10-5

10

10

60

1.6 x 103

0.59

3.16 x 10-4