Abstract
Heterogeneous nucleation and growth was used to prepare composite particles with homogeneous component distribution. Composite particles consisting of α-Al2O3 cores with an outer amorphous homogeneous silica layer were prepared by heterogeneous nucleation and growth processing using an ethanol suspension containing ammonia, tetraethylorthosilicate, and α-Al2O3. Fine mullite powders of average particle size 0.53 μm were fabricated by calcinating the composite particles at 1500°C for 2 h.
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