| 학회 | 한국재료학회 |
| 학술대회 | 2011년 가을 (10/27 ~ 10/29, 신라대학교) |
| 권호 | 17권 2호 |
| 발표분야 | C. Energy and the Environment Technology(에너지 및 환경재료) |
| 제목 | Temperature Dependence of Dielectric Properties for the Carbon Particle-Filled PMC below the Pt(Percolation Threshold) |
| 초록 | Temperature dependence of dielectric properties of the carbon particle-filled PMC(polyethylene matrix composites) below the percolation threshold is studied based on the EMA (effect medium approximation) theory. Although literature on the calculation based on the EMA theory by changing the parameters is vast, an overall discussion taking into account the EMA theory is required in order to explain the dielectric properties of the composites, the temperature dependence of them, for example. Changes of dielectric properties and the temperature dependence of them in the composites made of carbon particle and polyethylene below the Pt (percolation threshold) for the volume fraction of carbon black have been discussed based on the EMA theory. The composites is satisfied with the universal law of conductivity above Pt whereas it gives the critical exponent of s=1 for dielectric constant below Pt. The rate of the decrement of both % changes of dielectric constant and dielectric loss factor for temperature becomes larger with more the volume fraction below Pt. By incorporating the effect of thermal expansion into the EMA theory, the temperature dependence of dielectric properties is successfully explained. Acknowledgement; This work has been supported by SYOHWA Co. Ltd., Tokyo(Japan). |
| 저자 | 신순기 |
| 소속 | 강원대 |
| 키워드 | composites; EMA theory; electrical properties; electrical conductivity |
