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Thermal Conductivity and Microstructure Properties of Porous SiC Ceramic Derived from Silicon Carbide Powder
School of Science, China University of Geosciences, Beijing, China
School of Science, China University of Geosciences, Beijing, China
National Laboratory of Mineral Materials, China University of Geosciences, Beijing, China
National Laboratory of Mineral Materials, China University of Geosciences, Beijing, China
School of Materials Science and Technology, China University of Geosciences, Beijing, China
- 1 School of Science, China University of Geosciences, Beijing, China
- 2 School of Science, China University of Geosciences, Beijing, China
- 3 National Laboratory of Mineral Materials, China University of Geosciences, Beijing, China
- 4 National Laboratory of Mineral Materials, China University of Geosciences, Beijing, China
- 5 School of Materials Science and Technology, China University of Geosciences, Beijing, China
New Journal of Glass and Ceramics·Volume 03 (2013)·Pages 43–47·Published 29 January 2013·DOI10.4236/njgc.2013.31007
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Abstract
Porous SiC ceramic were prepared with silicon carbide powder as the aggregate, silicone resin as the binder and pore agent by the process of mixing, iso-static pressure molding, and calcination. The mechanical properties and microstructures of the samples were characterized with a universal testing machine, X-ray diffraction, scanning electron microscope, and mercury injection. Two main factors, molding pressures and silicone resin mass ratio were studied in the experiments. The thermal conductivity of the samples was tested. The compressive strength was up to 19.4 MPa, and the porosities up to 30%. The thermal conductivities, mainly influenced by porosities, increased from 0.68 W . m - 1. K - 1 to 1.03 W . m - 1. K - 1 with the porosity decreasing from 41.96% to 31.30%.
KeywordsPorous CeramicMicrostructureThermal ConductivitySiC
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