Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Fabrication and Mechanical Properties of High-strength Porous Supports for High Temperature Oxygen Transport Membrane

고온 산소분리막용 고강도 다공성 지지체 제조 및 기계적 특성 연구

  • Park, Geum Sook (Graduate School of Green Energy Technology, Chungnam National University) ;
  • Seong, Young-Hoon (Energy Materials and Convergence Research Department, Korea Institute of Energy Research) ;
  • Yu, Ji Haeng (Energy Materials and Convergence Research Department, Korea Institute of Energy Research) ;
  • Woo, Sang Kuk (Energy Materials and Convergence Research Department, Korea Institute of Energy Research) ;
  • Han, Moon Hee (Graduate School of Green Energy Technology, Chungnam National University)
  • 박금숙 (충남대학교 녹색에너지기술전문대학원) ;
  • 성영훈 (한국에너지기술연구원 에너지융합소재연구단) ;
  • 유지행 (한국에너지기술연구원 에너지융합소재연구단) ;
  • 우상국 (한국에너지기술연구원 에너지융합소재연구단) ;
  • 한문희 (충남대학교 녹색에너지기술전문대학원)
  • Received : 2013.10.02
  • Accepted : 2013.10.10
  • Published : 2013.11.30
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Abstract

Porous YSZ ceramics are fabricated using 3 mol% yittria-stabilized zirconia (3YSZ) and NiO with different particlesizes (0.6 and 7 ${\mu}m$). Nickel oxide (NiO) is added to the YSZ powder as a pore former with different amounts(40, 50, and 60 vol%) and at different sintering temperatures (1350 and $1400^{\circ}C$) are applied in order to evaluate the temperature effects on the pore and mechanical properties. Heat treatment is conducted after sintering at $700^{\circ}C$ in $H_2$ for the NiO reduction process; then, Ni is removed using a $HNO_3$ etchant solution. According to the NiO contentand sintering temperatures, 41-67% porous YSZ ceramic is obtained and the flexural strength increases, while the porosity decreases with an increasing sintering temperature. The optimum flexural strength ($136.5{\pm}13.4MPa$) and porosity (47%) for oxygen transport porous YSZ membrane can be obtained with 40 vol% of 7 ${\mu}m$ NiO particle at a sintering temperature of $1350^{\circ}C$.

Keywords

References

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