高純度ムライトの泥漿鋳込成形とその焼結体の特性(第2報) -真空ろ過成形と焼結体の機械的特性- Slip Casting of Mullite and Properties of Sintered Body(Part2)-Vacuum Pressure Assisted Slip Casting and Mechanical Properties of Sintered Body-
Slip casting of high purity mullite powder produced by coprecipitation method was studied to fabricate mullite ceramic parts with complicated shapes. The preparation conditions of well dispersed slurry (71mass% solids) was prepared by addition of deflocculant (0.2mass%), binder (0.3mass%) and defoamer (0.15mass%). Shaping of test pieces were used by the vaccum pressure assisted slip casting system with a porous polymer resin mold. The mechanical properties of the sintered body were investigated. High density mullite ceramics was obtained at 1650°C for 5hr. The sintered body of high purity mullite showed a flexural strength of about 290MPa and a Weibull modulus of 20.0 at room temperature.
粉体および粉末冶金 44(11), 1061-1064, 1997-11-15
Japan Society of Powder and Powder Metallurgy