Preparation of TiO2 Ultrafine Powder in Terms of SCFD Technique

Abstract

Abstract: Titanium dioxide ultrafine powders were prepard by sol-gel and supercritical fluid drying(SCFD) methods from cheap inorganic salts as raw materials. The ultrafine powders were characterized in terms of XRD, DTA-TG and TEM techniques. The dependence of particle size onsolution PH value, concentration, ageing time and SCFD condition was also investigated. It wasfound that the ultrafine powders so obtained eXhibit small crystallite sizes of 3-6urn, better thermal stability and less weight loss.

Key words: supercritical fluid drying, nanometer material, TiO₂, gasgel

CLC Number:

TF123

ZHANG Jing-Chang,CAO Wei-Liang,YU Ding-Xin,SHI Jin-Hua,DOU Zheng-Chang. Preparation of TiO₂ Ultrafine Powder in Terms of SCFD Technique[J]. Journal of Inorganic Materials.

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Preparation of TiO₂ Ultrafine Powder in Terms of SCFD Technique

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