The capillary reservoir technique was used to study the self-diffusion of 22Na in LiBr-KBr melts (table 20). The activation energy for the tracer diffusion of 22Na in eutectic mixtures, at temperatures ranging from 360 to 760C, was equal to 5.3kcal/mol. Diffusion and Transport in Molten Alkali Halides. M.Chemla, P.Lantelme, O.P.Mehta: Journal de Chimie Physique et de Physicochimie Biologique, 1969, October, 136-43

 

Table 20

Tracer Diffusion of 22Na in KBr-LiBr Melts

 

LiBr (%)

Temperature (C)

D (cm2/s)

4

750

6.55 x 10-5

51.5

363

1.72 x 10-5

51.5

401

2.42 x 10-5

51.5

456

2.75 x 10-5

51.5

507

3.83 x 10-5

51.5

548

4.25 x 10-5

51.5

642

5.85 x 10-5

51.5

761

8.70 x 10-5

76

496

4.40 x 10-5

99

566

6.81 x 10-5