Abstract
In order to obtain fine mullite powders by a simple and inexpensive process, alpha aluminum hydroxide (α-Al(OH) 3 ) was used as raw material, and heterogeneous nucleation-and-growth process was chosen for the preparation of powders. Composite coating particles consisting of α-Al(OH) 3 cores with outer amorphous silica shell were prepared by heterogeneous nucleation-and-growth process in the ethanol suspension containing ammonia, tetraethylorthosilicate (TEOS) and α-Al(OH) 3 . Fine mullite powders (average particle size 0.67 μm) were fabricated by calcined composite coating particles at 1500 °C for 2 h.
Original language | English |
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Pages (from-to) | 211-217 |
Number of pages | 7 |
Journal | Applied Surface Science |
Volume | 202 |
Issue number | 3-4 |
DOIs | |
State | Published - 30 Dec 2002 |
Keywords
- Composite coating particles
- Core-shell structures
- Fine mullite powders
- Heterogeneous nucleation-and-growth process
- Mullite stoichiometric ratio