低ソ-ダアルミナの泥しょう鋳込成形-1-泥しょう調製条件の検討

概要

論文の詳細を見る
Slip casting of low soda alumina powder was studied to fabricate alumina engineering ceramic parts with a complicated shape. As the powder characteristics, the isoelectric point of low soda alumina powder was determined from zeta-potential measurement to be pH=9.1. The preparation conditions of well-dispersed slurries were found for the low soda alumina by using an organic polymer deflocculant (polycarboxylic ammonium) and a binder (D-sorbitol). An optimum amount of added deflocculant was 0.15wt%, because at this amount the slurry showed large negative zeta-potential and the lowest apparent viscosity. Green bodies were prepared from the slurry by vacuum filtration with a porous resin mold. High-density (3.92-3.94g/cm<SUP>3</SUP>) sintered bodies were obtained by sintering at 1650°C for 2h in air.
社団法人粉体粉末冶金協会の論文