The densities and ionic conductivities in this system were studied. It was found that the substitution of an alkali halide for an alkali oxide produced an open structure. The ionic conductivity, as well as the molar volume, increased as the halogen content was increased (table 123).

A.A.El-Mongy: Physica Status Solidi A, 1994, 144[1], 17-22

 

 

 

Table 123

Activation Energy for Ionic Conduction in the

SiO2-Na2O-NaCl System as a Function of Composition

 

Na2O (mol%)

NaCl (mol%)

E (eV)

25

0

0.85

22.5

2.5

0.83

20

5

0.82

17.5

7.5

0.79

15

10

0.77

12.5

12.5

0.75

10

15

0.73

7.5

17.5

0.72

5

20

0.69

2.5

22.5

0.68

0

25

0.68