Abstract
The obtention of cordierite and cordierite–mullite ceramics by slip casting is studied. Aqueous slips with solids contents up to 65 wt% were used. The effect of the deflocculant content and the mixing time on the rheological behavior was studied, showing always a shear thickening behavior, which can be deletereous for demolding and handling. The rheological behavior became Newtonian by reducing the solid content up to 60 wt% and adding a plasticizer. This led to higher green densities (near 63% th). Different firing cycles were tested to improve the sintered density, reaching values between 96·5 and 97·5% th. In all cases, both the green and the sintered densities were significantly higher than those obtained by axial pressing.
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