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Hopping current and charge storage in crystal polymer electret

OU Yang-yi ,XU Fu-dong,et.al.  
In this paper,the formulas of hopping current in polymer and polymer electret are derived.By these formulas,a theoritical discharge equation of polymer electret can be derived.The step size of hopping electrons,caculated from the isothermal decay data of electrets,are about 10 -8 m.The average size of crystal line regions in polymers are also in the order of10 -8 m.This supports the above equa-tions experimentally.All the facts and points in this paper surpport the suggestion of that firmly stored charges are almost trapped in the bands of crystalline rigions of electret.[
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