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진공 압출성형 및 래밍성형 공정에 의한 탄화규소 캔들 필터 제조 및 특성
신명관,한인섭,서두원,김세영,우상국,이승원,김영욱,Shin, Myung-Kwan,Han, In-Sub,Seo, Doo-Won,Kim, Se-Young,Woo, Sang-Kuk,Lee, Seoung-Won,Kim, Young-Wook 한국세라믹학회 2009 한국세라믹학회지 Vol.46 No.6
Porous SiC candle filter preforms were fabricated by extrusion and ramming process. To fabricate SiC candle filter preform, commercially available 85 ${\mu}m\;{\alpha}-$-SiC powder and 44 ${\mu}m$ mullite, CaC$O_3$ powder were used as the starting materials. The candle type preforms were fabricated by vacuum extrusion and ramming process, and sintered at $1400{^{\circ}C}$ 2 h in air atmosphere. The effect of forming method on porosity, density, strength (flexural and compressive strength) and microstructure was investigated. Also, corrosion test of the sintered candle filter specimens as forming method was performed at $600{^{\circ}C}$ in IGCC syngas atmosphere. The sintered SiC filter which was formed by ramming process has more higher density and exhibit higher strength than extruded filter. Its maximum density and 3-point bending strength were 2.00 g/$cm^3$ and 45 MPa, respectively.