Slip casting of cordierite and cordierite-mullite materials

CAMERUCCI, M.A.; CAVALIERI, A.L; MORENO, R

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

ELSEVIER SCI LTD

Año: 1998 vol. 18 p. 2149 - 2157

0955-2219

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 60wt% 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. # 1998 Elsevier Science Limited. All rights reserved.