噴霧乾燥法により作製された顆粒体ならびに成形体特性に及ぼすスラリー調製条件の影響

抄録

In this paper, the effect of slurry preparation conditions on the characteristics of silicon nitride granules prepared by a spray drying process was investigated. The slurry flocculation structure was changed by adjusting the pH value and adding a dispersant, respectively. A single granule was characterized by its porosity, measured with a mercury porosimeter, as well as by its tensile strength measured by a microcompressive testing machine.
As a result, a new method to characterize the relationship between slurry preparation conditions and the characteristics of the granules was proposed. From the analysis by this method, it was found that the tensile strength of the granules changed becoming larger with the adhesive force between primary particles than with the contact number of primary particles.
Furthermore, the characteristics of the granules were correlated with the microstructure of green compacts.