In-Situ Observation of Surface Hydroxyl Group on Lithium Ceramics at High Temperature by Infrared Absorption Spectroscopy

Masaki Taniguchi; Satoru Tanaka; Yoshio Nose; Victor Grishmanov

doi:dx.doi.org/10.13182/FST95-A30587

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In-Situ Observation of Surface Hydroxyl Group on Lithium Ceramics at High Temperature by Infrared Absorption Spectroscopy

Masaki Taniguchi, Satoru Tanaka, Yoshio Nose, Victor Grishmanov

Fusion Science and Technology / Volume 28 / Number 3P2 / October 1995 / Pages 1284-1289

Tritium Properties and Interaction with Material / Proceedings of the Fifth Topical Meeting on Tritium Technology In Fission, Fusion, and Isotopic Applications Belgirate, Italy May 28-June 3, 1995 / dx.doi.org/10.13182/FST95-A30587

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Hydroxyl groups on the surface of Li₂O were studied by using a diffuse reflectance method with Fourier transform infrared spectroscopy at high temperature up to 833K under controlled D₂O or D₂ partial pressure. Multiple peaks due to the stretching vibration of 0-D were observed at 2748, 2717, 2660, 2620, 2540, 2520, 2490cm⁻¹ showing a different behavior with temperature or atmosphere. When D₂ was added to the sweep gas, peak intensity of 2660 and 2620cm₋₁ decreased. This result indicates that the surface nature is influenced by oxygen potential. Assignment of observed peaks to the surface nature was also discussed.