Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Fabrication and Thermophysical Properties of Al2O3-Based Multicomponent Composites by Sol-Gel Process

알루미나가 포함된 복합산화물의 제조와 열물성 특성평가

  • Lim, Saet-Byeol (Department of Chemistry/Institute of Basic Science, Sungshin Womens Univ.) ;
  • You, Hee-Jung (Department of Chemistry/Institute of Basic Science, Sungshin Womens Univ.) ;
  • Hong, Tae-Whan (Department of Material Science and Engineering/Research Center for Sustainable Eco-Devices and Materials (ReSEM), Chungju National Univ.) ;
  • Jung, Mie-Won (Department of Chemistry/Institute of Basic Science, Sungshin Womens Univ.)
  • 임샛별 (성신여자대학교 화학과/기초과학연구소) ;
  • 유희정 (성신여자대학교 화학과/기초과학연구소) ;
  • 홍태환 (충주대학교 신소재공학과/친환경에너지부품소재센터) ;
  • 정미원 (성신여자대학교 화학과/기초과학연구소)
  • Received : 2010.08.11
  • Accepted : 2010.08.31
  • Published : 2010.09.27
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Abstract

$Al_2O_3$ has received wide attention with established use as a catalyst and growing application in structural or functional ceramic materials. On the other hand, the boehmite (AlO(OH)) obtained by sol-gel process has exhibited a decrease in surface area during phase transformation due to a decline in surface active site at high temperature. In this work, $Al_2O_3$-CuO/ZnO (ACZ) and $Al_2O_3$-CuO/CeO (ACC) composite materials were synthesized with aluminum isopropoxide, copper (II) nitrate hemi (pentahydrate), and cerium (III) nitrate hexahydrate or zinc (II) nitrate hexahydrate. Moreover, the Span 80 as the template block copolymer was added to the ACZ/ACC composition to make nano size particles and to keep increasing the surface area. The ACZ/ACC synthesized powders were characterized by Thermogravimetry-Differential Thermal analysis (TG/DTA), X-ray Diffractometer (XRD), Field-Emmision Scanning Electron Microscope (FE-SEM), Bruner-Emmett-Teller (BET) surface analysis and thermal electrical conductivity (ZEM-2:M8/L). An enhancement of surface area with the addition to Span 80 surfactant was observed in the ACZ powders from 105 $m^2$/g to 142 $m^2$/g, and the ACC powders from 103 $m^2$/g to 140 $m^2$/g, respectively.

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References

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