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- W2012904103 abstract "Abstract Spherical particles of mixed silica/titania composition were prepared by hydrolysis of aerosols consisting of titanium (IV) ethoxide and silicon (IV) chloride. Vapor of the latter was absorbed into preformed droplets of the alkoxide, the size of which could be controlled by changing the temperature and the flow rate of the carrier gas through the apparatus containing the two reagents. These droplets were then exposed to water vapor. The resulting amorphous mixed silica/titania particle were of a narrow size distribution, easily dispersed in water, with an isoelectric point at pH 7.1 ± 0.1. Heating at high temperature resulted in crystallization. ESCA measurements indicated an enrichment of titanium atoms on the surface, while atomic absorption analysis showed higher silicon concentration in the bulk phase. Light scattering data gave refractive index between that of SiO 2 and TiO 2 . BET surface areas suggested that the original colloidal particles were porous." @default.
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- W2012904103 date "1987-01-01" @default.
- W2012904103 modified "2023-09-23" @default.
- W2012904103 title "Preparation of uniform colloidal dispersions by chemical reactions in aerosols IV. Mixed silica/titania particles" @default.
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- W2012904103 doi "https://doi.org/10.1016/0166-6622(87)80137-3" @default.
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