Lithium diffusion was measured in xLi2O-(1-x)B2O3 melts as a function of temperature and composition by high-temperature pulsed field gradient NMR. The 7Li self-diffusion coefficients were found to increase with increasing x when compared at the same temperature. It was of much interest that Ea in the molten xLi2O-(1-x)B2O3 system decreased monotonously with increasing Li2O content up to x = 0.4 and then increased at x = 0.45 and 0.5.

Self-diffusion Coefficient of Lithium in Molten xLi2O-(1-x)B2O3 System using High-Temperature PFG NMR. T.Ohkubo, M.Gobet, V.Sarou-Kanian, C.Bessada, M.Nozawa, Y.Iwadate: Chemical Physics Letters, 2012, 530, 61-3