湿式成形プロセス最適設計のための新たなスラリー評価法(第1報) : 遠心圧密挙動の時間依存性

概要

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For the purpose of characterizing concentrated slurry suspension applied in fine ceramics shaping process, an evaluation technique has been developed which measures time changes in balancing moment stemming from the centrifugal consolidation of particles. The dispersing system of alumina slurry has been controlled by adjusting the concentration of dispersant as well as the solids content. It is shown that the transient behavior of concentrated slurry in centrifugal field essentially consists of a consolidation and deformation process of network structure immediately formed after particle sedimentation is started. The mechanical strength of the network structure depends on the dispersing system of prepared slurry It is also demonstrated that the consolidation process of the network structures can be expressed by strain parameter, e=e_∞{1-exp(-t/τ)}, which contains two characteristic values:the final equilibrium strain, e_∞ and the delay time, τ.
1998-05-01