Research on manufacturing high alumina porous ceramic sheets for kiln lining materials


  • Nguyen Thanh Dong School of Chemical Engineering, Hanoi University of Science and Technology, 01 Dai Co Viet, Hai Ba Trung, Ha Noi, Viet Nam
  • Mai Van Vo School of Chemical Engineering, Hanoi University of Science and Technology, 01 Dai Co Viet, Hai Ba Trung, Ha Noi, Viet Nam



porous ceramic, kiln lining, high alumina, high temperature, combustible additive


High alumina porous  ceramic sheets with  Al2O3 content  ≥  95 wt.%  have many excellent thermal properties such as high thermal resistance, good insulation and low shrinkage. Thus, they arevery suited for a kiln working at high temperature. Using combustibleadditive to create porous structure for materials is a method which has a lot of benefits such as being simple and  easy  to  adjust  pore  content.  This  study  has  designed  a  raw  meal  of  92.5 wt.% alumina powder and 7.5 wt.% kaolin (A mixture), selected sawdust (B) as a combustible additive with a volume ratio ofA/B = 55/45. The sample after pre-sintering at 1300oC has a volumetricdensityof  1.22 g/cm3,  shrinkage  of 1.36 %,  andacertain  level  of sintering.  This  resultsin  a  certain mechanical  strength with cold compressive  strength of 10.05 MPa,  which  is  convenient  for transport  as  well  as  sawing,  cutting  and  assembling  into  the  kiln  lining.  After  the  secondary heating at 1650oC, itsshrinkage increased slightly by approximately 1 %, volumetric density is 1.29 g/cm3, porosity is 55.49 % and cold compressive strength is 10.58 MPa. Theresult shows that  it  is  feasible  to  fabricate  a  large  size of  high  aluminaporous  ceramic sheets for  high temperature kiln lining materials.


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How to Cite

N. T. Dong and M. V. Vo, “Research on manufacturing high alumina porous ceramic sheets for kiln lining materials”, Vietnam J. Sci. Technol., vol. 59, no. 6A, pp. 176–184, Mar. 2022.



International Symposium on Materials Science and Engineering - ISMSE