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http://dx.doi.org/10.4191/kcers.2013.50.6.423

Fabrication and Mechanical Properties of High-strength Porous Supports for High Temperature Oxygen Transport Membrane  

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)
Publication Information
Journal of the Korean Ceramic Society / v.50, no.6, 2013 , pp. 423-428 More about this Journal
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
Microporous YSZ; Mechanical property; Porosity; Acid etching;
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Times Cited By KSCI : 1  (Citation Analysis)
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