Mesoporous alumina is usually used as adsorption material,catalyst carrier or separationmedia due to its high adsorption and good thermal stability.However,the nano-sized powder trends to aggregation except that its size is in sub-micron scale.The best choice is that the sub-micron alumina particles with mesoporous structure are prepared.In the present work,the mesoporous alumina spheres were prepared by micro emulsion method using aluminium isopropoxide as raw material and water/dimethylbenzene emulsion as reaction media.The obtained powder was characterized by XRD,TEM and BET.The results show that the particles are global.The particles size is in the range of 100 ～ 200 nm to several micrometers.The particle owns the worm-like structure with the pore size of 5 nm.The BET surface area of the mesoporous alumina is 81.8 m2/g.The obtained powder is suit to be used as the packing material in chromatograph.
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