Preparation of Ultra-fine TiO2 Particles Using Micro-Mixing Precipitation Technology

Abstract

Abstract: A method of micro-mixing-precipitation technology was developed from membrane dispersion technology to prepare
ultra-fine TiO₂ particles. Titanic sulfate was selected as the dispersed phase, and ammonium acid carbonate as the continuous phase. The influences of
the reactant concentrations and two-phase flow rate were investigated. The crystal structure and crystal dimension of the particles were analyzed by
XRD, morphology, particle size and size distribution by TEM. The results showed that the spheric TiO₂ nano-particles with small size and narrow
size distribution could be prepared with the method. The crystal dimension and the particle size of the TiO₂ particles were increased with the
increasing of reactant concentrations at first, then decreased. They also were decreased with the increasing of the flow rate of Ti(SO₄)₂ solution,
but increased with the increasing of the flow rate of NH₄HCO₃ solution.

Key words: micro-mixing-precipitation, TiO₂, ultra-fine

CLC Number:

O643
TB383

CHEN Gui-Guang,LUO Guang-Sheng,YANG Xue-Rui,SUN Yi-Wen,WANG Jia-Ding. Preparation of Ultra-fine TiO₂ Particles Using Micro-Mixing Precipitation Technology[J]. Journal of Inorganic Materials.

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Preparation of Ultra-fine TiO₂ Particles Using Micro-Mixing Precipitation Technology

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