Solubility and diffusivity of hydrogen in Li2O

The solubility and the diffusivity of hydrogen and deuterium in sintered Li2O pellets were measured by a thermodynamical technique such as equilibrium-quenching and the hot-extraction method. The hydrogen solubility was found to obey Sieverts' law. The diffusion coefficient and its activation energy for hydrogen (deuterium) in Li2O at the temperature region from 500 to 8000C were similar to those for tritium in neutron irradiated Li2O. These hydrogen behaviors seem to be different from those in the lower temperature region where LiOH can stably exist. (orig.)