Ch. Schilling et al., PLASTIC SHAPING OF AQUEOUS ALUMINA SUSPENSIONS WITH SUCROSE AND MALTODEXTRIN ADDITIVES, Journal of environmental polymer degradation, 3(3), 1995, pp. 153-160
Traditional methods for the shape-forming of engineering ceramics enta
il plastic deformation of powder slurries containing hazardous organic
liquids as suspending media. Replacing these organic with aqueous med
ia requires the development of environmentally benign, water-soluble a
dditives which serve as plasticizers and binders. Fundamental studies
were performed with aqueous suspensions of colloidal alpha-Al2O3 to ev
aluate the role of sucrose and maltodextrin on viscosity, sedimentatio
n, and filtration characteristics, plastic flow behavior of filter cak
es, and sinterability. Maltodextrin systems exhibited superior results
, including filtration to high packing densities and clay-like plastic
ity with minimal cracking.