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http://dx.doi.org/10.4191/kcers.2015.52.4.273

Solvothermal Synthesis of α-Al2O3 from Boehmite with Seeding Technique  

Jo, Hye Youn (Eco-composite Materials Team, Korea Institute of Ceramic Engineering & Technology (KICET))
Park, Min-Gyeong (Eco-composite Materials Team, Korea Institute of Ceramic Engineering & Technology (KICET))
Lee, Seung-Ho (Eco-composite Materials Team, Korea Institute of Ceramic Engineering & Technology (KICET))
Kim, Dae Sung (Eco-composite Materials Team, Korea Institute of Ceramic Engineering & Technology (KICET))
Lee, Young Kwan (School of chemical Engineering, Sungkyunkwan University)
Lim, Hyung Mi (Eco-composite Materials Team, Korea Institute of Ceramic Engineering & Technology (KICET))
Publication Information
Journal of the Korean Ceramic Society / v.52, no.4, 2015 , pp. 273-278 More about this Journal
Abstract
${\alpha}-Al_2O_3$ 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.
Keywords
Solvothermal synthesis; ${\alpha}-Al_2O_3$; Seeding technique; Crystal growth;
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