PRODUCTION OF TRANSPARENT YTTRIUM/ALUMINUM/GARNET SINTERED BODY BY DRY MIXING METHOD

摘要

PROBLEM TO BE SOLVED: To inexpensively produce a YAG sintered body having transparency, which can be used as various optical materials. ;SOLUTION: The YAG sintered body is obtained by mixing Y2O3 powder containing sulfur in an amount of 0.03-10 wt.% (as S based on the weight of Y2O3) and having an average particle size of primary particles of 0.01-0.4 μm and Al2O3 powder having an average particle size of primary particles of 0.01-1.5 μm in such a ratio that the Y2O3 powder and Al2O3 powder forms yttrium/ aluminum/garnet, then compacting the mixture and sintering the obtained green body at 1,600-1,850°C under such an atmosphere that the total partial pressure of the gaseous components which can not be diffused within the yttrium/ aluminum/garnet is not more than 0.5 atom so that the residual amount of sulfur to be not more than 0.02 wt.% (as S based on the weight of Y3Al5O12) after sintering.;COPYRIGHT: (C)2000,JPO