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Preparation of Spherical Titania Particles from Inorganic Precursor by Homogeneous Precipitation

Published online by Cambridge University Press:  21 February 2011

A. Kato ,
Y. Takeshita  and
Y. Katatae
A. Kato
Affiliation:
Kyushu University, Faculty of Engineering, Fukuoka, 812, Japan
Y. Takeshita
Affiliation:
Kyushu University, Faculty of Engineering, Fukuoka, 812, Japan
Y. Katatae
Affiliation:
Kyushu University, Faculty of Engineering, Fukuoka, 812, Japan
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Abstract

Spherical titania particles can be prepared in a short time period from an aqueous solution of TiOSO4 by homogeneous precipitation using urea at 70–90°C. Although the hydrolysis of TiOSO4 continues to a considerable extent even in the absence of urea, the presence of urea is essential for the formation of spherical particles. The average particle size produced was l–4μm and changed mainly with the concentration of TiOSO4. As-synthesized powders are amorphous hydrates of titania containing sulfate group and crystallize by calcination into anatase(>500°C) and rutile(>900°C). In calcination, the particles shrink, but hold their original spherical shapes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 155: Symposium L – Processing Science of Advanced Ceramics , 1989 , 13
Copyright
Copyright © Materials Research Society 1989

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References

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