Change in the short range order in the Al-transition metal hydroxides mixed system by mechanical stressing

S. Sekino, Tetsuhiko Isobe, M. Senna, T. Shinohara, F. Wagatsuma, K. Sumiyama, K. Suzuki

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationMaterials Science Forum
PublisherTrans Tech Publ
Volume343
Publication statusPublished - 2000
EventISMANAM-99: The International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials - Dresden, Ger
Duration: 1999 Aug 301999 Sep 3

Other

OtherISMANAM-99: The International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials
CityDresden, Ger
Period99/8/3099/9/3

Fingerprint

Hydroxides
Transition metals
Nuclear magnetic resonance
Redox reactions
SQUIDs
Point contacts
Magnetic susceptibility
Oxides
Cations
Positive ions
Electric fields
Oxidation

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Sekino, S., Isobe, T., Senna, M., Shinohara, T., Wagatsuma, F., Sumiyama, K., & Suzuki, K. (2000). Change in the short range order in the Al-transition metal hydroxides mixed system by mechanical stressing. In Materials Science Forum (Vol. 343). Trans Tech Publ.

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. Vol. 343 Trans Tech Publ, 2000.

Research output: Chapter in Book/Report/Conference proceedingChapter

Sekino, S, Isobe, T, Senna, M, Shinohara, T, Wagatsuma, F, Sumiyama, K & Suzuki, K 2000, Change in the short range order in the Al-transition metal hydroxides mixed system by mechanical stressing. in Materials Science Forum. vol. 343, Trans Tech Publ, ISMANAM-99: The International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials, Dresden, Ger, 99/8/30.
Sekino S, Isobe T, Senna M, Shinohara T, Wagatsuma F, Sumiyama K et al. Change in the short range order in the Al-transition metal hydroxides mixed system by mechanical stressing. In Materials Science Forum. Vol. 343. Trans Tech Publ. 2000
Sekino, S. ; Isobe, Tetsuhiko ; Senna, M. ; Shinohara, T. ; Wagatsuma, F. ; Sumiyama, K. ; Suzuki, K. / Change in the short range order in the Al-transition metal hydroxides mixed system by mechanical stressing. Materials Science Forum. Vol. 343 Trans Tech Publ, 2000.
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