In the present study, the novel granulation method, spray fluidized bed granulation method was used to produce the granules. Subsequently compacts of the granules were produced through a series of process of dry compaction and sintering under atmospheric pressure. The effects of the properties of granules on compacts and sintered compacts were investigated.
First, the granules with target size and good flowability could be produced by using the granulator. The granules were found to have spherical shapes and smooth surfaces. Second, compaction of the granules with sharp size distribution and good flowability showed low fluctuation in flexural strength. Third, granules with low strength were useful for the production of sintered compacts with highly density and flexural strength.
In addition to granulation, the granulator has ability to perform the coating of the granules. For pharmaceutical materials, coating of granules and subsequent compaction was performed. The results showed coating operation enhanced the strength of compacts. For ceramic materials, similar achievement is expected.