Self-Diffusion of Lithium in Molten LiBeF_3
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The self-diffusion coefficients of lithium in molten LiBeF_3 have been measured with the capillary reservoir technique using ^6Li as a tracer. The self-diffusion coefficients D were calculated from the concentration profiles of ^6Li in a capillary obtained by an ion micro mass analyser. The result can be described with the Arrhenius equation, D=1.12×10^<-2>exp(-9310±3000/RT), where D is expressed in cm^2/sec, R in cal/mol-deg and T in degree Kelvin. The self-diffusion coefficients of lithium in molten LiBeF_3 are smaller than those in molten Li_2BeF_4. On the other hand, the activation energies are quite similar in molten Li_2BeF_4 and LiBeF_3. These results suggest that lithium ion diffuses through narrow space between the complex anions keeping electrical neutrality.
- Transactions of JWRI
Transactions of JWRI 7 (1), 1-3, 1978-06