Slip Casting and Sintering of Y-PSZ (Part 1). Preparation Conditions of Slurry
Y‐PSZの泥しょう鋳込成形と焼結(第1報) 泥しょう調製条件の検討

Saburo Sano, Kenichi Koizumi, Takumi Banno, Yasuo Shibasaki, Kiichi Oda
1997 Journal of the Japan Society of Powder and Powder Metallurgy  
SYNOPSIS This study is concerned with the fabrication of engineering ceramics parts with complicated shape by using slip casting process. Preparation conditions of slurries for 3 kinds yttria partially stabilized zirconia (Y-PSZ) powders were examined by the measurement of zeta-potential and viscosity. As the powder characteristics, the isoelectric points of Y-PSZ powders were determined from zeta-potential measurement to be pH7.9 and 9.0 for powders produced by hydrolysis and pH5.3 for a
more » ... produced by neutralization coprecipitation. Welldispersed slurries were found for Y-PSZ powders by adding organic polymer deflocculant (polycarboxilic ammonium) to the zeta-potential of the powder becoming enough high at the negative side. When the adding amount of deflocculant was shorted and the zeta-potential was around OmV, the viscosity of the slurry becoming very high and can't use for slip casting. In a case of a Y-PSZ powder produced by hydrolysis, low viscosity slurry can be prepared without adding deflocculant since the zeta-potential is high enough at the positive side.
doi:10.2497/jjspm.44.876 fatcat:4k3ux7uh6vfajgakkxab7rwmoe