Porous Alumina Ceramic Prepared by HEMA-TBA Gelcasting System

【Author】

XIE Yu-Zhou;PENG Chao-Qun;WANG Xiao-Feng;WANG Ri-Chu;LUO Feng

【Institution】

School of Materials Science and Engineering, Central South University;School of Materials Science and Engineering, Central South University;School of Materials Science and Engineering, Central South University;School of Materials Science and Engineering, Central South University;Shangrao Dinxin Metal Chem. Co., Ltd

【Abstract】

Porous alumina ceramics with high porosity and high strength were successfully fabricated by HEMA-TBA gelcasting system. Fabrication processes of slurries and ceramic were studied, effects of solid loading and dispersant content on viscosity and stability of slurries, effects of drying and monomer content on green bodies, and effects of solid loading and sintering temperature on sintered bodies were investigated. The results show that optimum addition of citric acid of 2 wt% decreases the viscosity and increases the stability of slurry. The viscosity and stability of the slurries increase with the increase of the solid loading of slurries. Green bodies with low solid loading can be dried with relatively small shrinkage less than 10% and its drying time is also relatively shorter than water based gelcasting system. The amount of monomer has great influence on green body and the strength of green body achieves high value at monomer content of 25%. By choosing the solid loading of slurries and sintering temperatures, ceramic microstructures and the porosity ranging in 40%–65% can be effectively controlled, and the strength of porous ceramics changes in the range of 5.7–91.2 MPa.

【Keywords】

porous ceramic;gelcasting;slurry;rheological properties

References

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Total: 31 articles

  • [1] ZHOU Li-Zhong,WANG Chang-An,LIU Wei-Yuan,HUANG Yong(Department of Materials Science and Engineering,State Key Laboratory of New Ceramics and Fine Processing,Tsinghua University,Beijing 100084,China), Fabrication of Low Density High Strength Porous Mullite Ceramics by Tert-butyl Alcohol-based Gelcasting Process, Journal of Inorganic Materials,
  • [2] LI yan-gang,WANG zhi-yi(College Materials Sicence and Engneering,Qingdao University Science & Technology,Qingdao 266042), Influences of Different Drying Methods on the Dehydration Process of Alumina Green Body Fabricated by Gel-Casting, Shandong Ceramics,
  • [3] WANG Xiao-feng,WANG Ri-chu,PENG Chao-qun,LI Ting-ting,LIU Bing(School of Materials Science and Engineering,Central South University,Changsha 410083,China), Effect of process conditions on strength of BeO green body prepared by gelcasting, Journal of Functional Materials,
  • [4] JIN Xiao1,CAI Kai2,LIU Wei1,DONG Yingge1,HU Shengliang1,YANG Jinlong2(1.Center for Advanced Ceramics,School of Materials Science and Engineering,North University of China,Taiyuan 030051; 2.State Key Lab of New Ceramics and Fine Processing,Department of Materials Science and Engineering, Tsinghua University,Beijing 100084,China), Effects of Monomer Content on Internal Stresses During Solidification Process and Properties of Green Bodies by Gelcasting, Journal of the Chinese Ceramic Society,

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