| abstract |
NANOCRISTALINE ALPHA ALUMINUM ALXIDE SINTERIZED BODIES, THEIR PRODUCTION METHODS, AS WELL AS THEIR USE. The present invention relates to a sintered ceramic body of Î ”-AI-2-O-3-based with a content of 95-100 wt.% Of Al-2-O-3 ~, a density of Relative sintering of <97% of theoretical density and a Vicker HV ~ 0.2 ~ hardness of 17.5 GPa, whose crystallite structure has an average primary crystal size of AI ~ 2 ~ O ~ 3 ~ crystals. <100 min. The object of the invention is also a process for producing a sintered body with an average primary crystal size of <100 mn, wherein, starting from the basic aluminum chloride, a <244> -AI ~ 2 is initially produced. The ~ 3 ~ nanocrystalline, which is then transformed to a sintered body with an average primary crystallite size of <100 mn. |