Electrical and Thermal Properties of Carbon-Coated Porous Ceramic Fiber Composites
| Periodical | Materials Science Forum (Volumes 486 - 487) |
|---|---|
| Main Theme | Eco-Materials Processing & Design VI |
| Edited by | Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee |
| Pages | 370-373 |
| DOI | 10.4028/www.scientific.net/MSF.486-487.370 |
| Citation | Jun Suh Yu et al., 2005, Materials Science Forum, 486-487, 370 |
| Online since | June, 2005 |
| Authors | Jun Suh Yu, Sung Park, Jae Chun Lee, In Sup Hahn, Sang Kuk Woo |
| Keywords | Carbon, Ceramic Fiber, Chemical Vapor Deposition (CVD), Coating, Conductivity, Electrical, Porous, Thermal |
| Price | US$ 28,- |
Porous ceramic fiber composites were coated with pyrolytic carbon by the decomposition of propane in a nitrogen atmosphere at 900℃. The amount of carbon coating was varied through adjusting deposition time to tailor the electrical conductivity of the carbon-coated composites. The electrical and thermal conductivity of the composites were measured at room temperature using a two-point method and a hot-wire method, respectively. Up to 7 wt% pyrolytic carbon, the electrical conductivity σ is linearly increased to 0.02 S/cm and well fitted by the effective conductivity according to the parallel rule of a mixture σ eff = Σ Χ i ·σ i with a conductivity of pyrolytic carbon σ c= 20 S/cm .The thermal conductivity of the uncoated and coated composites is in the range 0.065-0.075 W/mK and little affected by carbon coating presumably owing to the small amount of coated carbon in this work.
