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To improve the mean-life and reliability of power cables, we have investigated the volume resistivity and thermal properties demonstrated by changing the content of carbon black, an additive of the semiconductive shield for underground power transmission. Nine specimens were made of sheet form for measurement. Volume resistivity of the specimens was measured by a volume resistivity meter after 10 minutes in a preheated oven at temperatures of both 25$\pm$1[$^{\circ}C$] and 90$\pm$ 1[$^{\circ}C$]. As well, specific heat (Cp) and thermal conductivity were measured by Nano Flash Diffusivity and DSC (Differential Scanning Calorimetry). The ranges of measurement temperature were from 0[$^{\circ}C$] to 200[$^{\circ}C$], and heating temperature was 4[$^{\circ}C$/min]. From these experimental results, volume resistivity was high according to an increase of the content of carbon black. Specific heat was decreased, while thermal conductivity was increased according to a rise in the content of carbon black. Furthermore, both specific heat and thermal conductivity were increased by heating temperature because the volume of materials was expanded according to a rise in temperature.

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참고문헌 (14)

  1. Jae-hong Han, Sang-jun Kim, Oh-hyung Kwon, Hee-tae Kang, Kwang-suk Suh, 'The effect of impurities within semiconductive shield layer on the reliability of power cables', KIEE Transactions, Vol. 46, No. 1, pp. 19-27, 1997 
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  7. Conductive Carbon Black in Plastics, Technical Report S-39, Cabot Corporation 
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  9. J. Hjerrild, J. Holboll, M. Henriksen, S. Boggs, 'Effect of semicon-dielectric interface on conductivity and electric field distribution', Dielectrics and Electrical Insulation, IEEE Transactions on, Vol. 9, No. 4, pp. 596-693, Aug. 2002 
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  11. Soo-jin Park, Soo-wan Song, Jae-sub Shin, 'The PTC properties of HDPE base complex material filled with ozone treated carbon black', J. Korean Ind. Chem, Vol. 14, No. 8, pp. 1086-1091, Dec. 2003 
  12. Y.H Han, J. W Jung, T. H Kwon, H. S Song, K.S Koo, B.S Han and B.S Han, 'Development of Waterproof Jacket Materials for Power Cables', KIEE Inter. Trans. on EA, Vol. 3, No. 4, August, 2003 
  13. Soo-jin Park, Soo-wan Song, Min-gang Suh, Jae-rak Lee, 'Electrical properties of Nanostructured Carbon black-filled HDPE Composites: Effect on electron beam irradiation on PTC characteristics', Journal of The Korean Institute of Composite Materials, Vol. 16, No. 1, pp. 19-25, Feb. 2003 
  14. Sung-chun Kim et al, 'Polymer Engineering I', Hee Joong Dang, 1994, Chapter 1-14 

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