COMPLEX METAL OXIDE POWDER, YTTRIUM-ALUMINUM GARNET POWDER (VERSIONS), AND METHOD FOR PREPARING COMPLEX METAL OXIDE Russian patent published in 1999 - IPC

FIELD: inorganic compounds production. SUBSTANCE: complex metal oxide powder is provided having at least two metal elements and containing polyhedral particles, each having at least 6 planes and whose number-average particle size ranges from 0.1 to 500 mm and D₉₀/D₁₀ ratio is equal to 10 or less (D₁₀ and D₉₀ are particle sizes at 10 and 90% accumulation, respectively going from smallest size on summary particle-size curve). Also provided is yttrium-aluminum garnet powder containing polyhedral particles, each having at least 6 planes and whose number-average particle size ranges from 20 to 500 mm. These complex metal oxides contain less agglomerated particles and are characterized by narrow size distribution and uniformly shaped particles. EFFECT: improved homogeneity. 46 cl, 3 tbl, 21 ex