抄録
The redox reaction between Al and Ni(OH)2 or Cu(OH)2 by milling was studied mainly by XRD, 27Al-NMR, 63Cu-NMR and SQUID. With the progress of milling, the crystallinity of Al and hydroxides were degraded, while new crystallized phases appeared. Oxidation of metallic Al was confirmed by 27Al-NMR spectra. A linear relationship with negative inclination was obtained between the Knight shift (27K) of 27Al-NMR and magnetic susceptibility (χ) for these milled products. This suggests that the electric field gradient of metallic Al nuclei be influenced by transition metal cations, accommodating in the surface oxide layer on metallic Al particles. From these observations, we conclude that redox reactions occur at the contact point between Al and transition metal hydroxides. Theoretical background of the reaction was also discussed.
| 元の言語 | English |
|---|---|
| ホスト出版物のタイトル | Materials Science Forum |
| 出版者 | Trans Tech Publ |
| 巻 | 343 |
| 出版物ステータス | Published - 2000 |
| イベント | ISMANAM-99: The International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials - Dresden, Ger 継続期間: 1999 8 30 → 1999 9 3 |
Other
| Other | ISMANAM-99: The International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials |
|---|---|
| 市 | Dresden, Ger |
| 期間 | 99/8/30 → 99/9/3 |
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ASJC Scopus subject areas
- Materials Science(all)
これを引用
Change in the short range order in the Al-transition metal hydroxides mixed system by mechanical stressing. / Sekino, S.; Isobe, Tetsuhiko; Senna, M.; Shinohara, T.; Wagatsuma, F.; Sumiyama, K.; Suzuki, K.
Materials Science Forum. 巻 343 Trans Tech Publ, 2000.研究成果: Chapter
}
TY - CHAP
T1 - Change in the short range order in the Al-transition metal hydroxides mixed system by mechanical stressing
AU - Sekino, S.
AU - Isobe, Tetsuhiko
AU - Senna, M.
AU - Shinohara, T.
AU - Wagatsuma, F.
AU - Sumiyama, K.
AU - Suzuki, K.
PY - 2000
Y1 - 2000
N2 - The redox reaction between Al and Ni(OH)2 or Cu(OH)2 by milling was studied mainly by XRD, 27Al-NMR, 63Cu-NMR and SQUID. With the progress of milling, the crystallinity of Al and hydroxides were degraded, while new crystallized phases appeared. Oxidation of metallic Al was confirmed by 27Al-NMR spectra. A linear relationship with negative inclination was obtained between the Knight shift (27K) of 27Al-NMR and magnetic susceptibility (χ) for these milled products. This suggests that the electric field gradient of metallic Al nuclei be influenced by transition metal cations, accommodating in the surface oxide layer on metallic Al particles. From these observations, we conclude that redox reactions occur at the contact point between Al and transition metal hydroxides. Theoretical background of the reaction was also discussed.
AB - The redox reaction between Al and Ni(OH)2 or Cu(OH)2 by milling was studied mainly by XRD, 27Al-NMR, 63Cu-NMR and SQUID. With the progress of milling, the crystallinity of Al and hydroxides were degraded, while new crystallized phases appeared. Oxidation of metallic Al was confirmed by 27Al-NMR spectra. A linear relationship with negative inclination was obtained between the Knight shift (27K) of 27Al-NMR and magnetic susceptibility (χ) for these milled products. This suggests that the electric field gradient of metallic Al nuclei be influenced by transition metal cations, accommodating in the surface oxide layer on metallic Al particles. From these observations, we conclude that redox reactions occur at the contact point between Al and transition metal hydroxides. Theoretical background of the reaction was also discussed.
UR - http://www.scopus.com/inward/record.url?scp=0033700642&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033700642&partnerID=8YFLogxK
M3 - Chapter
AN - SCOPUS:0033700642
VL - 343
BT - Materials Science Forum
PB - Trans Tech Publ
ER -