The crystallization of anatase and the conversion to bronze-type TiO2 under hydrothermal conditions

H. Nishizawa, Yuriko Aoki

研究成果: ジャーナルへの寄稿記事

20 引用 (Scopus)

抄録

When the anatase form of TiO2 was heated at a constant rate of 6°C/min to 450°C it crystallized from hydrated amorphous TiO2 gel at 170°C in pure water or at <150°C in NaOH solutions. The uptake of Na+ ions into crystallized anatase affected the reactions subsequent to this initial crystallization while only anatase crystals continued to grow with increasing temperature in pure water. Immediately after the nearly amorphous second stage at 325°C, conversion from colloidal anatase particles to square sheet-shaped bronze-type TiO2 crystals began at 350°C and was complete at 425°C in 0.5 M NaOH. This conversion was considered to proceed via crystallographic shear rather than via dissolution and precipitation since this also happened with thermal treatment to 700°C in air.

元の言語英語
ページ(範囲)158-165
ページ数8
ジャーナルJournal of Solid State Chemistry
56
発行部数2
DOI
出版物ステータス出版済み - 1 1 1985
外部発表Yes

Fingerprint

Bronze
bronzes
Crystallization
anatase
Titanium dioxide
crystallization
Crystals
Water
water
crystals
dissolving
Dissolution
Gels
Heat treatment
gels
Ions
shear
titanium dioxide
air
Air

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

これを引用

The crystallization of anatase and the conversion to bronze-type TiO2 under hydrothermal conditions. / Nishizawa, H.; Aoki, Yuriko.

:: Journal of Solid State Chemistry, 巻 56, 番号 2, 01.01.1985, p. 158-165.

研究成果: ジャーナルへの寄稿記事

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