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Katsube, Daiki*; Ono, Shinya*; Inami, Eiichi*; Yoshigoe, Akitaka; Abe, Masayuki*
Vacuum and Surface Science, 65(11), p.526 - 530, 2022/11
The oxidation of oxygen vacancies at the surface of anatase TiO (001) was investigated by synchrotron radiation photoelectron spectroscopy and supersonic O beam (SSMB). The oxygen vacancies at the top surface and subsurface could be eliminated by the supply of hyperthermal oxygen molecules. Oxygen vacancies are present on the surface of anatase TiO(001) when it is untreated before transfer to a vacuum chamber. These vacancies, which are stable in the ambient condition, could also be effectively eliminated by using oxygen SSMB. This result is promising as a surface processing for various functional oxides.
Otobe, Haruyoshi; Nakamura, Akio; Yamashita, Toshiyuki; Minato, Kazuo
Journal of Nuclear Materials, 344(1-3), p.219 - 222, 2005/09
Times Cited Count:3 Percentile:24.17(Materials Science, Multidisciplinary)Actinides-bearing zirconias are prominent candidate materials for various nuclear applications: targets for actinide transmutation, inert material fuels, radioactive waste forms, etc. In this study, the oxygen potential (g(O)) behavior of fluorite-type (F-type) ZrPuO has been measured by EMF method using the zirconia oxygen sensor. It was found that the g(O) values of F-type ZrPuO were about 150 kJ/mol higher than those of F-type PuO at the same oxygen-nonstoichiometric (O/M) values. The g(O) values of F-type ZrPuO were 50 kJ/mol lower than those of pyrochlore ZrPuO at the same O/M values. These results suggest that the g(O) behavior depends on the cation and anion ordering/disordering, in addition to the cation composition ratio (Zr/Pu).
吉越 章隆
阿部 真之*; 勝部 大樹*; 大野 真也*
【課題】 効率的なN元素ドープTIO2の製造方法を提供する。 【解決手段】本発明に係るN元素ドープTIO2の製造方法は、ターゲットとなるTIO2を真空チャンバ内の所定位置に配置するステップと、真空チャンバを真空引きするステップと、ノズルを所定温度に加熱するステップと、ノズルを所定温度に維持しつつ、ノズルからNO分子の超音速分子線をターゲットに照射するステップとを備える。