A study was made of the mixed monocrystals at temperature ranging from 150 to 650C. It was found that the plots of log[conductivity] versus reciprocal temperature exhibited 4 regions. The activation energies which were associated with the various regions were deduced as a function of composition (table 25), as was the conductivity (table 26).

G.S.Kumar, T.Bhimasankaram, G.Prasad: Crystal Research and Technology, 1993, 28[7], 1001-8

 

 

Table 25

Activation Energies for Ionic Conduction in KBrxI1-x Monocrystals

 

x

Temperature (C)

Q (eV)

0

150-250

0.73

0

250-315

1.12

0

315-496

1.14

0

496-630

1.51

0.3

150-250

0.63

0.3

250-315

1.09

0.3

315-496

1.13

0.3

496-630

1.42

0.8

150-250

0.79

0.8

250-315

1.13

0.8

315-496

1.53

0.8

496-630

1.54

0.875

150-250

0.80

0.875

250-315

1.11

0.875

315-496

1.46

0.875

496-630

1.58

1

150-250

0.82

1

250-315

1.16

1

315-496

1.65

1

496-630

1.87

 

 

 

Table 26

Ionic Conductivities of KBrxI1-x Monocrystals

as a Ratio of the Conductivity of KBr

 

x

Temperature (C)

Ratio

0

315

1.50

0

416

3.33

0

560

5.60

0

596

6.76

0.2

315

2.14

0.2

416

7.00

0.2

560

9.30

0.2

596

10.40

0.4

315

2.28

0.4

416

7.62

0.4

560

11.25

0.4

596

15.13

0.6

315

1.43

0.6

416

4.76

0.6

560

6.70

0.6

596

8.23

0.8

315

0.71

0.8

416

2.09

0.8

560

2.50

0.8

596

2.45