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Dielectric characteristics of LDPE filled with micro- and nano-sized particles of SiO2 were studied in this paper. The dependence of the loss factor and dielectric constant of composites on frequency was investigated in a relatively wide frequency range, and the roles of the size and loading level of the filler are discussed. Compared with additive-free LDPE, incorporating nano-sized SiO2 can effectively...
The composite of nano-SiOx and low-density polyethylene is prepared with the double-solution method. Charging currents of the composite at same dc stress, as well as discharging currents, are recorded with Keithley 6517A. It is found that the curves of charging and discharging currents decrease with charging times. Transferring those charging and discharging currents from time domain into frequency...
The dielectric behavior of a composite system of low-density polyethylene filled with nano-Ag is investigated with time-domain method at the room temperature (293 K). It is shown that the charging vs. time of the composite is lower than that of the pure low-density, however, the depolarization of the composite is faster than that of the pure low-density polyethylene. It seems that nano-Ag/LDPE composite...
The composite of nano-SiOx and low-density polyethylene is prepared with the double-solution method. Charging currents of the composite at different dc stress, as well as discharging currents, are recorded with Keithley 6517A. It is found that the curves of charging and discharging currents increase with electrical field. Transferring those charging and discharging currents from time domain into frequency...
The composite of low-density polyethylene (LDPE)/nano SiO/sub x/ was prepared by the method of double-solution mixture, and its high field volt-ampere characteristic (HFVAC) was studied The HFVAC of the composite significantly differs to that of pure LDPE. More interesting is that, at the contents of 0.5%-3% of nano SiOx, the percolation phenomena exits in the HFVAC of the composite. At the same time,...
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