Hostname: page-component-7c8c6479df-94d59 Total loading time: 0 Render date: 2024-03-28T13:18:11.101Z Has data issue: false hasContentIssue false

Preparation of Spherical Titania Particles from Inorganic Precursor by Homogeneous Precipitation

Published online by Cambridge University Press:  21 February 2011

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
Get access

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
Copyright
Copyright © Materials Research Society 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Barringer, E.A. and Bowen, H.K., J. Am. Ceram. Soc., 65, C199 (1982).Google Scholar
2. Ikemoto, T., Uematsu, K., Mizutani, N. and Kato, M., Yogyo-Kyokai-Shi, 93, 261 (1985).Google Scholar
3. Diaz-Gugm-es, M.I., Carreno, T. Gonzalez and Serna, C.J., J. Mat. Sci. Lett., 7, 671 (1988).Google Scholar
4. Edelson, L.H. and Glaeser, A.M., J. Am. Ceram. Soc., 71, 225 (1988); 71, C-198 (1988).Google Scholar
5. Matijevic, E., Pure & Appl. Chem., 50, 1193 (1978).Google Scholar
6. Matijevic, E., Budnik, M. and Meites, L., J. Colloid Interface Sci., 61, 302 (1977).Google Scholar