CuO-Camphene 슬러리의 동결건조에 의한 Cu 다공체 제조
Fabrication of Porous Cu by Freeze-Drying Method of CuO-Camphene Slurry
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초록
In order to fabricate the porous metal with controlled pore characteristics, unique processing by using metal oxide powder as the source and camphene as the sublimable material is introduced. CuO powder was selected as the source for the formation of Cu metal via hydrogen reduction. Camphene-based CuO slurry, prepared by milling at 47℃ with a small amount of dispersant, was frozen at -25℃. Pores were generated subsequently by sublimation of the camphene. The green body was hydrogen-reduced at 200℃ for 30 min, and sintered at 500-700℃ for 1 h. Microstructural analysis revealed that the sintered Cu showed aligned large pore channels parallel to the camphene growth direction, and fine pores are formed around the large pore. Also, it showed that the pore size was controllable by the slurry concentration.
Abstract
In order to fabricate the porous metal with controlled pore characteristics, unique processing by using metal oxide powder as the source and camphene as the sublimable material is introduced. CuO powder was selected as the source for the formation of Cu metal via hydrogen reduction. Camphene-based CuO slurry, prepared by milling at 47℃ with a small amount of dispersant, was frozen at -25℃. Pores were generated subsequently by sublimation of the camphene. The green body was hydrogen-reduced at 200℃ for 30 min, and sintered at 500-700℃ for 1 h. Microstructural analysis revealed that the sintered Cu showed aligned large pore channels parallel to the camphene growth direction, and fine pores are formed around the large pore. Also, it showed that the pore size was controllable by the slurry concentration.
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