Preparation of bauxite ceramic microsphere

Abstract

Ceramic microspheres were prepared by using Chinese bauxite as raw materials through the centrifugal spray drying method. The control technology of microsphere size, degree of sphericity was researched. The ceramic microspheres were sintered by a double sintering process. The microstructure and composition of ceramic microsphere were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray energy spectroscopy. The results show that the degree of sphericity of the ceramic microsphere was good and the particle size was 10–100 μm. The XRD analysis reveals that the main crystalline phase of the ceramic microsphere was α-Al₂O₃ and mullite (3Al₂O₃·2SiO₂). The product can be used as reinforced material for composite material, especially for antiskid and hard wearing aluminum alloy coating.

Keywords

ceramic microsphere / chinese bauxite / microstructure

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