| Pore ceramics have excellent chemical stability, mechanical properties, oxidation resistance at high temperature and thermal shock resistance, which are used as biomaterials, catalyst carrier materials, filtering materials and heat exchanger materials. The alumina ceramic becomes the preferred material among the numerous porous ceramics because of its lower preparation cost.The porous alumina ceramic which has definite porosity and flexural strength had been prepared by alumina powders as aggregate, starch as pore-forming material, clay as bonding, and forming by stem pressing as well as sintering at 1200～1400℃. The microstructures of porous alumina ceramic were analyzed by scanning electron microscope and X-ray diffraction, and its properties were measured.The effects of amount of pore-forming material and bonding, and sintering temperature on the porosity and flexural strength of porous alumina ceramic were analyzed by orthogonal experiment. The primary and secondary sequence which affects the porosity of pore alumina ceramic is sintering temperature, amount of pore-forming material and bonding, and that which affects the flexural strength of pore alumina ceramic is amount of pore-forming material, sintering temperature and amount of bonding. The optimization precept of porous alumina ceramic preparation is determinated as that the amount of pore-forming material is 10%, amount of bonding is 10%, and sintering temperature is 1300℃.At the same time, the effect of amount of additive on the properties of porous alumina ceramic was studied.The porous alumina ceramic which was prepared in this paper has higher porosity and condign flexural strength. And the processing parameters of porous alumina ceramic preparation which were studied in this paper aim at the industrialized production. Thus, the research results of this paper will provide a reference and foundation for the processing parameters determination of industrialized production of porous alumina ceramic.
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