浸渍法制备堇青石质多孔陶瓷

摘要/Abstract

摘要： 以攀西地区高岭土为主要原料,添加少量氧化铝和氧化镁,采用有机泡沫浸渍法制备堇青石多孔陶瓷,研究有机泡沫预处理时间及浆料固含量对堇青石多孔陶瓷显微结构及物理性能的影响。结果表明:在m(高岭土) ∶m(Al₂O₃) ∶m(MgO)=66 ∶21 ∶13、1 250 ℃保温0.5 h条件下,制得的堇青石多孔陶瓷孔径为1.0～1.2 mm,显气孔率为75.42%～96.27%,抗压强度为0.23～1.78 MPa,透水系数为18.58～25.86 cm·s^-1;当浆料固含量为40%(质量分数)时,对有机泡沫预处理(NaOH溶液浸泡)6 h,在1 250 ℃保温0.5 h制得的堇青石多孔陶瓷透水系数及显气孔率分别为20.45 cm·s^-1和90.73%。

关键词: 堇青石, 多孔陶瓷, 浸渍法, 透水系数, 抗压强度

Abstract: Cordierite porous ceramics were prepared by organic foam impregnation method using kaolin from Panxi region as main raw material and adding a small amount of alumina and magnesium oxide, to study the effects of organic foam pretreatment time and slurry solid content on the microstructure and physical properties of cordierite porous ceramics. The results show that when m(kaolin) ∶m(Al₂O₃) ∶m(MgO)=66 ∶21 ∶13, the sintering temperature is 1 250 ℃ and the holding time is 0.5 h, the pore size of cordierite porous ceramics is 1.0~1.2 mm, the apparent porosity is 75.42%~96.27%, the compressive strength is 0.23~1.78 MPa, and the permeability coefficient is 18.58~25.86 cm·s^-1. When the mass fraction of slurry solid content is 40%, the water permeability and apparent porosity of cordierite porous ceramics produced by pretreatment of organic foam (NaOH solution soaking) for 6 h, and heat preservation at 1 250 ℃ for 0.5 h are 20.45 cm·s^-1 and 90.73%, respectively.

Key words: cordierite, porous ceramics, impregnation method, water permeability coefficient, compressive strength

中图分类号:

TQ175

陈冬丽. 浸渍法制备堇青石质多孔陶瓷[J]. 硅酸盐通报, 2024, 43(3): 1070-1077.

CHEN Dongli. Preparation of Cordierite Based Porous Ceramics byImpregnation Method[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(3): 1070-1077.

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