中文摘要：

以高岭土、滑石和氧化铝为主要原料采用生料一次烧成工艺制备低膨胀堇青石蜂窝陶瓷。研究了不同粒径丙烯酸发泡树脂成孔剂对试样的气孔结构、热膨胀系数、吸水率和抗压强度的影响，并利用x射线衍射仪、扫描电镜分析了试样的物相组成和断面形貌。研究结果表明：调整成孔剂的粒径能够控制气孔分布和形态，随着成孔剂粒径变大，大气孔量增多，小气孔量减少，气孔总容量逐渐增大，而堇青石蜂窝陶瓷的相组成不变；当孔容由0．13cm^3／g增至0．27cm^3／g时，热膨胀系数从1．46×10^-6/℃降低到0．67×10^-6／℃，随着孔容继续增到0．33cm^3／g，热膨胀系数升高到1．33×10^-6／℃，吸水率逐渐增大而抗压强度降低。

英文摘要：

Low thermal expansion eordierite honeycombs were prepared by one step sintering technique, using kaolin, talcum and α-Al2O3 micro-powders as main starting materials. Effects of particle size of foamed acrylic resin beads as the pore-former on the coefficient of thermal expansion （CTE）, water absorption and compressive strength of the prepared cordierite honeycombs were studied. The phase composition and cross-sectional morphology of the cordierite honeycombs were analyzed by X-ray diffraction （XRD） and scanning electron microscope （SEM）, respectively. The results show that the distribution and structure of pores can be controlled by adjusting the size of foamed acrylic resin beads. The big pore quantity increases and the small pore quantity reduces with the increase of the size of the pore-former, while the total pore volume increases gradually. The addition of the pore-former shows no obvious influence on the phase composition of the prepared honeycombs. The CTE decreases from 1.46 ×10^-6/℃ to 0.67× 10^-6/℃ when the pore volume increases from 0.13 cm3/g to 0.27 cm3/g, and then the CTE increases to 1.33 × 10^-6/℃ with further increase of the pore volume to 0.33 cm3/g. The water absorption increases gradually with the increase of the pore volume, while the compressive strength decreases.