Abstract
Using a vibrating rod viscometer, the changes in dynamic viscosity and dynamic rigidity of clay slips during casting processes were determined at various deflocculation degrees with the following results.
The fluidity of the slip, and also the hardness of the pieces obtained by casting were found to be improved with the increasing degree of deflocculation α as long as it does not exceed a≅6 Na2O, 2SiO2/100g clay, while the extremely high concentration of the deflocculant brought the less fluid slip which produced by casting only the pieces having low hardness values.
