首页|Effect of Zircon Addition on Properties of Corundum Porous Materials
Effect of Zircon Addition on Properties of Corundum Porous Materials
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This paper aims to improve the corrosion resistance of dispersive purging plugs.White fused corundum particles and fine powder,α-Al2O3 micropowder,Cr2O3 micropowder,Guangxi clay and zircon powder were used as the main raw materials.The mass ratio of white fused corundum particles and fine powder was fixed at 85:15,and 0,1％,2％,or 3％(by mass)of zircon fine powder was added to replace the same amount of white fused corundum fine powder.The corundum porous material was prepared by the particle stacking pore-forming method at 1 650 ℃ for 3 h.The effect of the zircon addition on the properties and microstructure of porous materials was investigated.The results show that:after adding zircon,the permeability of the porous material increases,the cold and hot strengths increase obviously,and the expansion rate after firing decreases.When the addition of zircon is 2％,the comprehensive performance of the specimen is optimal with the smallest linear change rate and the highest permeability.
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