Glass samples were prepared by heating at 723K, and quenching into liquid N. Polycrystalline samples were made by slowly cooling the melt to room temperature. The conductivity of pulverized samples, which were pressed together with a mixture of Ag and electrolyte, was measured at temperatures of between 300 and 365K at 1kHz. It was found that the ionic conductivities of the glasses were always higher than those of the crystalline material. The activation energies were also slightly higher (table 236). Measurements which were performed on annealed glassy samples indicated that the conductivity decreased with increasing annealing time, and reached a constant value which was almost the same as that of polycrystalline samples.

K.Hariharan, R.Kaushik: Journal of Materials Science, 1987, 22[9], 3335-41

 

 

 

Table 236

Ionic Conductivity of Glassy and Polycrystalline AgI-Ag2O-V2O5

 

Ag2O (mol%)

V2O5 (mol%)

Sample

σ305K (S/cm)

Q (eV)

18.75

6.25

crystal

1.34 x 10-4

0.33

18.75

6.25

glass

2.14 x 10-4

0.29

21.88

7.29

crystal

3.07 x 10-4

0.23

21.88

7.29

glass

2.30 x 10-3

0.29

25.00

8.33

crystal

1.05 x 10-3

0.17

25.00

8.33

glass

5.30 x 10-3

0.27

28.13

9.38

crystal

6.26 x 10-4

0.20

28.13

9.38

glass

2.53 x 10-3

0.30

31.25

10.42

crystal

1.79 x 10-4

0.25

31.25

10.42

glass

2.18 x 10-3

0.26

37.50

12.50

crystal

1.19 x 10-5

0.27

37.50

12.50

glass

1.90 x 10-3

0.27

43.75

14.58

crystal

4.18 x 10-6

0.35

43.75

14.58

glass

1.45 x 10-3

0.32

50.00

16.67

crystal

4.91 x 10-6

0.35

50.00

16.67

glass

7.90 x 10-4

0.29