Chemical Composition of Alumina Powders prepared by different routes

Component Sol-Gel Pyrolysis Controlled Precipitation Gibbsite (Bayer)
Al2O3 99.93 99.9 99.73 99.52
SiO2 335 365 1250 300
Fe2O3 65 160 840 270
Na2O 110 195 210 4000
K2O 30 110 100 60
Mn2O3 10 15 10 15
TiO2 40 50 30 45
CaO 20 25 150 60
MgO 40 70 10 35
CuO 25 25 10 15


Note : all impurities in ppm

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