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A preliminary study on mechanical-electrical behavior of graphite powder-filled high-density polyethylene composites

โœ 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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โœฆ 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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โœ Yihu Song; Yi Pan; Qiang Zheng; Xiao-Su Yi ๐Ÿ“‚ Article ๐Ÿ“… 2000 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 204 KB ๐Ÿ‘ 2 views

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