Carbon Black-Polyethylene복합재료의 Percolation Threshold 전후 저항율에 미치는 온도의 영향 = Effect of the Temperature on Resistivity of Carbon Black-Polyethylene Composites Below and Above Percolation Threshold

다국어 초록 (Multilingual Abstract)

Temperature dependency of resistivity of the carbon black-polyethylene composites below and above percolation threshold is studied based on the electrical conduction mechanism. Temperature coefficient of resistance of the composites below percolation threshold changed from minus to plus, increasing volume fraction of carbon black; this trend decreased with increasing volume fraction of carbon black. The temperature dependence of resistivity of the composites below percolation threshold can be explained with a tunneling conduction model by incorporating the effect of thermal expansion of the composites into a tunneling gap. Temperature coefficient of resistance of the composites above percolation threshold was positive and its absolute value increased with increasing volume fraction of carbon black. By assuming that the electrical conduction through percolating paths is a thermally activated process and by incorporating the effect of thermal expansion into the volume fraction of carbon black, the temperature dependency of the resistivity above percolation threshold has been well explained without violating the universal law of conductivity. The apparent activation energy is estimated to be 0.14 eV.

참고문헌 (Reference)

1 S. Nakamura, 136 : 5163-, 1997

2 P. Sheng, 21 : 2180-, 1980

3 S. G. Shin, 7 (7): 605-, 2002

4 S. Nakamura, 119 : 1335-, 1997

5 A. L. Efros, 76 : 475-, 1976

6 D. Staufer, Tayler & Francis 1972

7 S. Nakamura, 117 : 371-, 1995

8 S. Nakamura, 1999

9 S. Nakamura, 118 : 280-, 1996

10 송유진, "전해액 조성에 따른 구리박막의 전기적 특성 변화에 대한 연구" 한국재료학회 19 (19): 344-348, 2009

11 홍현선, "고온수전해용 Ni/YSZ와 Cu/YSZ 환원극의 미세구조 및 전기전도도 비교" 한국재료학회 18 (18): 384-388, 2008

12 C. Ishida, "Handbook of Electronic Materials" Asakura shoden 769-, 2006

13 Soon-Gi Shin, "Fracture Detection in Concrete by Glass Fiber Cloth Reinforced Plastics" 대한금속·재료학회 12 (12): 137-140, 2006