Dopants in flame synthesis of titania
- Univ. of Cincinnati, OH (United States). Dept. of Chemical Engineering
The effect of dopants on the characteristics of titania particles made by oxidation of TiCl{sub 4} in a laminar diffusion flame reactor is presented. Introduction of dopant SiCl{sub 4} inhibits the transformation of anatase to rutile, due to the formation of interstitial solid solution of SiO{sub 2} and TiO{sub 2}. Silica decreases the sintering rate of titania and decreases the primary particle size, and, as a result, the specific surface area increases. Introduction of SnCl{sub 4} enhances the transformation of anatase to rutile, due to the similar crystalline structure of SnO{sub 2} and rutile titania. However, the presence of SnO{sub 2} does not affect the primary particle size or the specific surface area of titania particles. Introduction of AlCl{sub 3} enhances the transformation of anatase to rutile, due to the formation of excess oxygen vacancies as Al{sub 2}O{sub 3} and TiO{sub 2} form a substitutional solid solution.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 136496
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 11 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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