Controlling Crystallinity during Processing of Nanocrystalline Titania | Zendy

Hague Douglas C. | Zendy; Mayo Merrilea J. | Zendy

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Controlling Crystallinity during Processing of Nanocrystalline Titania

Author(s) -

Hague Douglas C.,

Mayo Merrilea J.

Publication year - 1994

Publication title -

journal of the american ceramic society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.9

H-Index - 196

eISSN - 1551-2916

pISSN - 0002-7820

DOI - 10.1111/j.1151-2916.1994.tb07078.x

Subject(s) - crystallite , crystallinity , nanocrystalline material , calcination , amorphous solid , materials science , anatase , alkoxide , chemical engineering , thermal decomposition , decomposition , inorganic chemistry , mineralogy , chemistry , photocatalysis , metallurgy , nanotechnology , crystallography , composite material , catalysis , organic chemistry , engineering

The present study shows that an extremely high water: alkoxide ratio during the hydrolysis of titanium isopropoxide results in a partially crystalline precipitate (5‐nm anatase crystallites); however, when these crystallites are rinsed with ethanol, the precipitate becomes amorphous. The degree of crystallinity of the precipitate determines its subsequent thermal decomposition characteristics and, ultimately, the crystallite size of the calcined powder.

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