Hydrogen Atmosphere Effect on Vaporization of Li_2TiO_3 by means of High Temperature Mass Spectrometry

摘要

The atmosphere controlled high temperature mass spectrometer has provided the vapor pressure data for a promising tritium breeding material, Li_2TiO_3, under condition of low-pressure hydrogen atmosphere. The observed vaporization behavior of Li_2TiO_3 under hydrogen addition is presented here. It was pointed out that hydrogen addition may cause formation of non-stoichiometric composition phase. For elucidating its possible non-stoichiometric character, the composition of Li_2TiO_3 has been investigated mainly by means of thermo-gravimetry. The results revealed that Li_2TiO_3 has doubly non-stoichiometric composition, Li_(2-x)TiO_(3-y).