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J. Korean Ceram. Soc. > Volume 50(6); 2013 > Article
Journal of the Korean Ceramic Society 2013;50(6): 423.
doi: https://doi.org/10.4191/kcers.2013.50.6.423
고온 산소분리막용 고강도 다공성 지지체 제조 및 기계적 특성 연구
박금숙, 성영훈1, 유지행1, 우상국1, 한문희
충남대학교 녹색에너지기술전문대학원
1한국에너지기술연구원 에너지융합소재연구단
Fabrication and Mechanical Properties of High-strength Porous Supports for High Temperature Oxygen Transport Membrane
Geum Sook Park, Young-Hoon Seong1, Ji Haeng Yu1, Sang Kuk Woo1, Moon Hee Han
Graduate School of Green Energy Technology, Chungnam National University
1Energy Materials and Convergence Research Department, Korea Institute of Energy Research
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 $1350^{circ}C$.
Key words: Microporous YSZ, Mechanical property, Porosity, Acid etching
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