Abstract
The effect of irradiation on ion conductivity of lithium oxide (Li 2O) was studied using oxygen ion (120 MeV) irradiation. The conductivity at 489 K decreased with the oxygen ion fluence, while that at 443 K increased. From the thermal recovery behavior of conductivity, the measured decrease at 489 K due to the irradiation was attributed to the F + centers. On the other hand, the measured increase of conductivity at 443 K during the irradiation was considered to arise from unspecified defects which enhanced the conductivity. Also, a preliminary optical absorption study of lithium aluminate (γ-LiAlO 2) irradiated by oxygen ions was done. No prominent absorption band due to the irradiation was observed for the specimens irradiated to 1.4 × 10 21 and 6.6 × 10 19 ions/m 2 by oxygen ions with energies of 1 and 120 MeV, respectively. The energy of the fundamental optical absorption edge (band gap energy) for γ-LiAlO 2 was found to be about 4.8 eV.
Published Version
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