Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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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))
  • Received : 2015.06.25
  • Accepted : 2015.07.14
  • Published : 2015.07.31
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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

References

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