Fabrication of stable Al2O3 slurries and dense green bodies using soft-energy milling process

✍ Scribed by Y. Hotta; K. Tsunekawa; T. Shirai; K. Sato; M. Yasuoka; K. Watari

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 812 KB
• Volume: 29
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/j.jeurceramsoc.2008.07.013

✦ Synopsis

Wet-jet milling and planetary homogenizing processes as soft-energy milling methods were employed as a novel method to prepare stable Al 2 O 3 slurries. The viscosity of slurries prepared from the soft-energy milling was constant and stable for long time, as compared to ball-milled slurries. Though Al 2 O 3 particles surface after ball milling yielded more hydroxyl groups, Al 2 O 3 particles surface after the soft-energy milling was similar state to raw particles surface. Relative density of the green bodies prepared from the wet-milled slurries was about 67% and was independent on the slurry solid content. On the other hand, the relative density of the green bodies prepared from the ball-milled slurries increased with increasing solid content. Linear shrinkage of the sintered bodies prepared from the soft-energy milled slurries was independent of the slurry solid content, whereas that of the sintered bodies prepared from the ball-milled slurries increased with decreasing solid content.