Abstract
In the paper, the results of investigations of temperature and frequency dependences of dielectric permeability and dielectric loss of compositions LDPE + xvol%Bi2Te3 are stated. The investigations were carried out at frequency 10 – 105 Hz and temperature 20°C - 150°C intervals, respectively. It was revealed that increase of percentage of the filler Bi2Te3 in the matrix, reduces to increase of dielectric permeability and dielectric loss of composites LDPE + xvol%Bi2Te3 in connection with the change reducing to Maxwell-Wagner’s volume polarization and emergence of comparative strong inner field in semiconductor clusters.
Highlights
Creation of composite materials is one of the basic directions in development of new prospective materials
Composition samples were obtained by mechanical mixing of powder Bi2Te3 with powder of lower density polyethylene (LDPE) in a porcelain motor
Dielectric permeability and dielectric loss of LDPE + xvol%Bi2Te3 were measured in the range of 296 - 520 K at linear growth of temperature with velocity 2.5 degree/min and in frequency range 1 by the technique described in the paper [6]
Summary
Creation of composite materials is one of the basic directions in development of new prospective materials. The filler particles play the role of a structuration, and the boundary layer of a polymer with filler has a special saturation structure. These are trapping cites with different values of energy of activation where the electrons are stabilized and as a result, electroactive properties of polymers are improved. It was revealed that with use of a filler of threefold compounds as AIII BIII C2VI based on polyethylene, one can obtain a new class of electret materials with record time of life [6]. We give the results of investigations of dielectric properties of composite materials based on lower density polyethylene (LDPE) filled with semiconductor compound Bi2Te3
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