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Sugai, Hiroyuki
Solid State Ionics, 177(39-40), p.3507 - 3512, 2007/01
The diffusion coefficient and its activation energy (116.3 11.7 kJ/mol) of tritium in an intermetallic compound -LiAl are determined at temperatures from 700 to 848 K. Though the present result for the diffusion coefficient is almost the same as that reported previously, the present result for the activation energy turns out nearly twice of that (64.9 3.8 kJ/mol). The present result for the activation energy is consistent with the systematics that an increase of lithium concentration in Al-Li systems increases the activation energy, but the previous result is not. Furthermore, a consideration of the crystal structure and defect structure suggests that tritium diffuses and is impeded by the attractive interaction with lithium atom at lithium sublattices.
Sugai, Hiroyuki
Solid State Ionics, 177(39-40), p.3507 - 3512, 2007/01
Times Cited Count:3 Percentile:17.87(Chemistry, Physical)The diffusion coefficients and its activation energy (103.79.5 kJ/mol) for tritium in intermetallic compound -LiAl are determined at temperatures from 699 to 886 K. Though the present result for the diffusion coefficient is almost the same as that reported earlier, the activation energy turns out nearly twice of that (64.93.8 kJ/mol) reported earlier. On the basis of the crystal structure and defect structure, the large activation energy of this study suggest that tritium diffuses interstitially and is impeded by an attractive interaction with lithium atoms in lithium sublattices.
Otobe, Haruyoshi; Nakamura, Akio; Yamashita, Toshiyuki; Minato, Kazuo
Journal of Physics and Chemistry of Solids, 66(2-4), p.329 - 334, 2005/02
Times Cited Count:23 Percentile:65.92(Chemistry, Multidisciplinary)Pyrochlore-type (P-type) zirconias have been attracting significant research interest as disposable forms of high-level radioactive waste. In this work, we have clarified the oxygen potentials (g(O)) vs. oxygen nonstoichiometry (x) and temperature relations of P-type CeZrO by the emf method and determined the lattice parameters (a0) with respect to x by XRD method.
Fujino, Takeo*; Sato, Nobuaki*; Yamada, Kota*; Okazaki, Manabu*; Fukuda, Kosaku; Serizawa, Hiroyuki; Shiratori, Tetsuo*
Journal of Nuclear Materials, 289(3), p.270 - 280, 2001/03
Times Cited Count:2 Percentile:19.66(Materials Science, Multidisciplinary)no abstracts in English
Nakamura, Akio; J. B. Wagner Jr.*
Proceedings of the Zirconia '86 Tokyo II, p.171 - 192, 1989/00
no abstracts in English
Katsuta, Hiroji; ;
Journal of Nuclear Materials, 115(2-3), p.206 - 210, 1983/00
Times Cited Count:25 Percentile:89.63(Materials Science, Multidisciplinary)no abstracts in English