Abstract
This chapter discusses the various methods of green body synthesis from ceramic powders in suspension, paste, and dry powder form. With respect to suspension processing, this chapter discusses particle filtration in slip casting, drain casting, and filter pressing. With respect to paste processing, the momentum balance has been used to determine the velocity profile in the molding operations of tape casting, extrusion, and injection molding. With dry pressing, a force balance and the Coulomb yield criterion have been used to establish when compaction will occur. The concern with all these methods has been the uniformity of packing density, particle segregation, and particle alignment. The characterization of the resulting green body has been discussed with respect to experimental methods that can be used to determine its uniformity. The uniformity of powder packing density, particle size distribution, bulk chemistry, particle alignment, and binder distribution are necessary if the green body is to survive the subsequent processing steps of drying, binder burnout, and finally sintering.
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