| 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 |
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| ABSTRACT |
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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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