The electric self-heating behavior of graphite-powder-filled high-density polyethylene is studied. Two equations are proposed to describe the electric-field dependence of the self-heating temperature and resistance dependence of the critical field. Based on Ohmic and non-Ohmic approximations and the
A preliminary study on mechanical-electrical behavior of graphite powder-filled high-density polyethylene composites
โ Scribed by Xiao-Su Yi; Yi-Hiu Song; Qiang Zheng
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 157 KB
- Volume
- 77
- Category
- Article
- ISSN
- 0021-8995
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โฆ Synopsis
Mechanical and electrical responses of graphite powder (GP)-filled highdensity polyethylene composites to a uniaxial compression-decompression cycle were studied. Above a compression loading level, a large positive-pressure coefficient effect of resistance was observed, for which a slide mechanism of GP in the matrix is believed to be responsible. In a step-wise compressive loading and loading-holding experiment, the critical compression level was also found, at which the resistance response changed from a time-independent one to a time-dependent, creep-like one. The current-voltage behavior of the composites showed that the GP contact was non-ohmic, regardless of GP contents and pressure levels.
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