| 탄화규소 불투명화재와 세라믹섬유가 Fumed 실리카 단열재의 열전도도에 미치는 영향 |
| 권영필, 권혁천, 박성, 이재춘 |
| 명지대학교 신소재공학과 |
| Effect of Ceramic Fibers and SiC Opacifiers on Thermal Conductivities of Fumed Silica-Based Thermal Insulation Media |
| Young-Pil Kwon, Hyuk-Chon Kwon, Sung Park, Jae-Chun Lee |
| Department of Materials Science and Engineering, Myongji University |
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| ABSTRACT |
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The thermal conductivities of nano-sized fumed silica-based insulation media were investigated by varying a mean particle size of the silicon carbide opacifiers and ceramic fiber content. Opacifying effect of ceramic fiber and silicon carbide powders was discussed in terms of their content and the mean particle size of them. As the fiber contents increased from 10 wt% to 30 wt% in a material, its thermal conductivity at temperatures of about $620^{circ}C$ decreased from 0.171 $Wm^{-1}K^{-1}$ to 0.121 $Wm^{-1}K^{-1}$. Meanwhile, the thermal conductivity at temperatures of about $625^{circ}C$ decreased from 0.128 $Wm^{-1}K^{-1}$ to 0.092 $Wm^{-l}K^{-1}$ as the mean SiC particle size decreased from $31{mu}m$ to $10{mu}m$. |
| Key words:
Fumed silica, Insulation, Thermal Conductivity, Ceramic Fiber, Silicon Carbide Opacifier |
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