Mechanisms of Al and titania hydrogel complex formation via a mechanical route

Yuumi Kojima, Tetsuhiko Isobe, Mamoru Senna, Takeshi Shinohara, Sakai Ono, Kenji Sumiyama, Kenji Suzuki

研究成果: Article査読

10 被引用数 (Scopus)


The process of complex formation has been studied during milling a powder mixture of metallic Al and titania hydrogel, TiO2 · H2O. Solid state 27Al NMR and ESR are employed together with conventional x-ray diffractometry and thermal analyses. Al atoms partly changed from metallic to oxide state. 27Al NMR analyses indicate that two metallic Al states are allotted to distorted and undistorted lattices, while the other to AlOx units in the oxide state, where x is 4, 5, or 6. As detected by ESR, Ti4+ was partly reduced to Ti3+, suggesting a redox reaction during milling. A vigorous thermit reaction was detected during subsequent heating of the mixture after prolonged milling. These results indicate the formation of Al-O-Ti bonds during milling, leading to Al2TiO5 on subsequent heating.

ジャーナルJournal of Materials Research
出版ステータスPublished - 1996 5

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学


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