The capillary reservoir technique was used to study the self-diffusion of 82Br in LiBr-KBr melts (table 21). The activation energy for the tracer diffusion of 82Br in eutectic mixtures, at temperatures ranging from 360 to 760C, was equal to 6.2kcal/mol.
M.Chemla, P.Lantelme, O.P.Mehta: Journal de Chimie Physique et de Physicochimie Biologique, 1969, October, 136-43
Table 21
Tracer Diffusion of 82Br in KBr-LiBr Melts
LiBr (%) | Temperature (C) | D (cm2/s) |
4 | 750 | 5.62 x 10-5 |
24.5 | 659 | 4.44 x 10-5 |
24.5 | 736 | 4.93 x 10-5 |
24.5 | 759 | 5.87 x 10-5 |
36 | 555 | 2.74 x 10-5 |
36 | 557 | 2.75 x 10-5 |
51.5 | 363 | 9.99 x 10-6 |
51.5 | 401 | 1.28 x 10-5 |
51.5 | 456 | 1.80 x 10-5 |
51.5 | 507 | 2.40 x 10-5 |
51.5 | 554 | 3.11 x 10-5 |
51.5 | 655 | 4.47 x 10-5 |
51.5 | 761 | 6.31 x 10-5 |
76 | 535 | 2.46 x 10-5 |
76 | 643 | 3.57 x 10-5 |
76 | 747 | 5.50 x 10-5 |
99 | 571 | 3.24 x 10-5 |
99 | 669 | 3.80 x 10-5 |
99 | 750 | 5.00 x 10-5 |