Fabrication of Porous Alumina-based Ceramics with Hydraulic Inorganic Binder

概要

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A novel fabrication process for porous alumina-based ceramics (calcium hexaaluminate (CA6)) was developed using hydraulic inorganic binder (calcium dialuminate (CA2)) and water. The CA2 binder and water acted as agents for direct consolidation, and water also acted as a fugitive material to create open pores. The green bodies formed with the CA2 binder and water had low green densities and high compressive strength. The porosity of the sintered CA6 ceramics increased with the content of water in the starting mixture: porosities could be adjusted to 15.7-33.3% with the addition of 20-80 wt.% water. The results of evolved gas analysis-mass spectrometry measurements showed the emissions from the novel fabrication process of the porous CA6 ceramics to be environmentally safe.
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