Ha, Jung-Soo
(School of Advanced Materials Engineering, Andong National University)
,
Lim, Byong-Gu
(Head Office & Factory, CoorsTek Asia Inc.)
,
Doh, Geum-Hyun
(Department of Forest Products Technology, Korea Forest Research Institute)
,
Kang, In-Aeh
(Department of Forest Products Technology, Korea Forest Research Institute)
,
Kim, Chang-Sam
(Battery Research Center, KIST)
Porous SiC samples were prepared with three types of wood (poplar, pine, big cone pine) by simply embedding the wood charcoal in a powder mixture of Si and $SiO_2$ at 1600 and $1700^{\circ}C$. The basic engineering properties such as density, porosity, pore size and distributio...
Porous SiC samples were prepared with three types of wood (poplar, pine, big cone pine) by simply embedding the wood charcoal in a powder mixture of Si and $SiO_2$ at 1600 and $1700^{\circ}C$. The basic engineering properties such as density, porosity, pore size and distribution, and strength were characterized. The samples showed full conversion to mostly $\beta$-SiC with good retention of the cellular structure of the original wood. More rigid SiC struts were developed for $1700^{\circ}C$. They showed similar bulk density ($0.5{\sim}0.6\;g/cm^3$) and porosity (81~84%) irrespective of the type of wood. The poplar sample showed three pore sizes (1, 8, $60\;{\mu}m$) with a main size of $60\;{\mu}m$. The pine sample showed a single pore size ($20\;{\mu}m$). The big cone pine sample showed two pore sizes (10, $80\;{\mu}m$) with a main size of $10\;{\mu}m$. The bend strength was 2.5 MPa for poplar, 5.7 MPa for pine, 2.8 MPa for big cone pine, indicating higher strength with pine.
Porous SiC samples were prepared with three types of wood (poplar, pine, big cone pine) by simply embedding the wood charcoal in a powder mixture of Si and $SiO_2$ at 1600 and $1700^{\circ}C$. The basic engineering properties such as density, porosity, pore size and distribution, and strength were characterized. The samples showed full conversion to mostly $\beta$-SiC with good retention of the cellular structure of the original wood. More rigid SiC struts were developed for $1700^{\circ}C$. They showed similar bulk density ($0.5{\sim}0.6\;g/cm^3$) and porosity (81~84%) irrespective of the type of wood. The poplar sample showed three pore sizes (1, 8, $60\;{\mu}m$) with a main size of $60\;{\mu}m$. The pine sample showed a single pore size ($20\;{\mu}m$). The big cone pine sample showed two pore sizes (10, $80\;{\mu}m$) with a main size of $10\;{\mu}m$. The bend strength was 2.5 MPa for poplar, 5.7 MPa for pine, 2.8 MPa for big cone pine, indicating higher strength with pine.
* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.
제안 방법
For the carbon templates and SiC samples, the phase and microstructure were examined using an X-ray diffractometer (XRD; RINT 2000, Rigaku Co., Japan) and a scanning electron microscope (SEM; JSM 6300, JEOL, Japan). The density and porosity were measured by the Archimedes method.
이론/모형
, Japan) and a scanning electron microscope (SEM; JSM 6300, JEOL, Japan). The density and porosity were measured by the Archimedes method. A mercury porosimeter (Pascal 140+440, Thermo Finnigan, Italy) was employed to investigate the pore size along with its distribution.
참고문헌 (15)
K. Ishizaki, S. Komarneni, and M. Nanko, Porous Materials: Process technology and applications, pp. 181, Kluwer Academic Publishers, Dordrecht/Boston/London, 1998.
Y-W. Kim and C.B. Park, “Processing of Microcellular Preceramics using Carbon Dioxide,” Comp. Sci. Tech., 63 2371-77 (2003).
L. Esposito, D. Sciti, A. Piancastelli, and A. Bellosi, “Microstructure and Properties of Porous b-SiC Templated from Soft Woods,” J. Eur. Ceram. Soc., 24 533-40 (2004).
J-M. Qian, J-P. Wang, G-J. Qiao, and Z-H. Jin, “Preparation of Porous SiC Ceramic with a Woodlike Microstructure by Sol-Gel and Carbothermal Reduction Processing,” J. Eur. Ceram. Soc., 24 3251-59 (2004).
J-M. Qian, J-P. Wang, and Z-H. Jin, “Preparation and Properties of Porous Microcellular SiC Ceramics by Reactive Infiltration of Si Vapor into Carbonized Basswood,” Mater. Chem. Phys., 82 648-53 (2003).
E. Vogli, J. Mukerji, C. Hoffman. R. Kladny, H. Sieber, and P. Greil, “Conversion of Oak to Cellular Silicon Carbide Ceramic by Gas-Phase Reaction with Silicon Monoxide,” J. Am. Ceram. Soc., 84 1236-40 (2001).
T. Ota, M. Imaeda, H. Takase, M. Kobayashi, N. Kinoshita, T. Hirashita, H. Miyazaki, and Y. Hikichi, “Porous Titania Ceramic Prepared by Mimicking Silicified Wood,” J. Am. Ceram. Soc., 83 1521-23 (2000).
T. Ota, M. Takahashi, T. Hibi, M. Ozawa, S. Suzuki, and Y. Hikichi, “Biomimetic Process for Producing SiC Wood,” J. Am. Ceram. Soc., 78 3409-11 (1995).
S-H. Chae, Y-W. Kim, I-H. Song, H-D. Kim, J. S. Bae, S-M. Na, and S-I. Kim, “Low Temperature Processing and Properties of Porous Frit-Bonded SiC Ceramics(in Korean),” J. Kor. Ceram. Soc., 46 [5] 488-92 (2009).
G-S. Cho, G-M. Kim, and S-W. Park, “Fabrication of Porous Reaction Bonded Silicon Carbide with Multi-Layered Pore Structures(in Korean),” J. Kor. Ceram. Soc., 46 [5] 534-39 (2009).
M-K. Shin, I-S. Han, D-W. Seo, S. Kim, S-K. Woo, S-W. Lee, and Y-W. Kim, “Fabrication and Properties of the SiC Candle Filter by Vacuum Extrusion and Ramming Process(in Korean),” J. Kor. Ceram. Soc., 46 [6] 662-67 (2009).
J-S. Ha, B.G. Lim, G-H. Doh, and I-A. Kang, “Fabrication of Porous Cellular SiC Ceramics from Wood by Embedding in Si/ $SiO_2$ Powder Mixture,” Key Eng. Mat., 336-38 1113-16 (2007).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.