关键词: 过滤材料;氧化铝纤维;玻璃粉;烧成温度

Abstract: Filtering ceramic for high temperature exhaust gas was prepared by the half dry pressing molding using alumina fiber and glass powder as raw material and activated carbon as pore-forming agent.The effects of the glass powder content, pore-forming agent content and sintering temperature on the filtration resistance, bending strength and apparent porosity were studied.The raw material formula was optimized and optimum firing temperature was selected.The optimal formula is determined as 70wt% alumina fiber and 30wt% glass powder with addition of 25% pore-forming agent and 8wt% carboxymethyl cellulose.The suitable firing temperature is 1100 ℃.The porous ceramic filter prepared by optimum parameters exhibits the flexural strength of 8.9 MPa, filtration resistance of 95 Pa and apparent porosity rate of 59%.

Key words: filter material;alumina fiber;glass powder;firing temperature