| Solvothermal Synthesis of α-Al2O3 from Boehmite with Seeding Technique |
| Hye Youn Jo, Min-Gyeong Park, Seung-Ho Lee, Dae Sung Kim, Young Kwan Lee1, Hyung Mi Lim |
Eco-composite Materials Team, Korea Institute of Ceramic Engineering & Technology (KICET)
1School of chemical Engineering, Sungkyunkwan University |
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| ABSTRACT |
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${alpha}-Al_2O_3$ was synthesized by solvothermal synthesis using ${alpha}-Al_2O_3$ seed, precursor of fine boehmite (Al(OOH)) or gibbsite ($Al(OH)_3$), and 1, 4-butanediol solvent. The seed content and precursor type were selected as variables in order to synthesize ${alpha}-Al_2O_3$. The formation time of ${alpha}-Al_2O_3$ was reduced and the size of the particles was decreased with addition of the seed. When the seed content was increased, the size of the synthesized ${alpha}-Al_2O_3$ was reduced. Morphologies of the as-synthesized ${alpha}-Al_2O_3$ with ${alpha}-Al_2O_3$ seed were polyhedron-shaped, while the shape was plate-like or polyhedral without the seed, depending on the additives or the average particle size of the boehmite precursor. The aggregation of as-synthesized ${alpha}-Al_2O_3$ from boehmite was smaller than that from gibbsite. As-synthesized ${alpha}-Al_2O_3$, with 140 nm size, was obtained by using the seed and boehmite precursor. |
| Key words:
Solvothermal synthesis, ${\alpha}-Al_2O_3$, Seeding technique, Crystal growth |
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