2005 Volume 113 Issue 1319 Pages 491-494
Al2O3 slurries with low viscosity and thixotropic properties which is suitable for slip casting were prepared within a short period of time by adopting wet jet milling process. The viscosity of wet jet milled slurry was about 6 mPa•s and remained unchanged for long time, while the viscosity of ball milled slurry rapidly increased with time and reached a maximum value. The FWHM of (113) XRD peak was the same before and after milling indicating no change in crystal structure by the process of milling. Particle size distribution of wet jet milled slurry corresponded to that of the ball milled slurry. However, wet jet milled slurry had low re-flocculation properties and high packing density (more than 60%) than ball milled slurry. We also found that the Al2O3 particles after ball milling yielded many hydroxy groups on the surface as compared with the raw materials and wet jet milled particles.
