Cordierite-based glass-ceramics processed by slip casting

In this research work, cordierite-based glass ceramics were prepared by sli p casting from slurries with different solids loading. The amount of disper sant imposed different influence on the rheological behaviour of the cordie rite-glass suspensions at different solids loading. A shear thinning behavi our was observed in the lower solids loaded suspensions (50 wt.%) with diff erent amounts of dis persant within the whole range of sheer rate. As the s olids loading increased (60, 70 wt.%,). the rheological behaviour of the su spensions gradually changed to shear thickening at higher shear rates. An o ptimal amount of dispersant for the cordierite-glass suspensions was found, which could lead to green bodies with homogeneous microstructures and to t he smallest pore diameters. The sintered bodies prepared by slip casting ex hibit higher density and microstructural homogeneity than those obtained by dry pressing. (C) 2001 Elsevier Science Ltd. All rights reserved.