Abstract
Low-frequency dielectric spectroscopy was used to study polymer composites with a piezoelectric filler. In a wide frequency range (ν = 25 × 106 Hz) and temperature range (273-423 K), the dielectric characteristics (∊ and tg δ) and electrical conductivity (σ) of polymer composites with a piezoelectric filler were investigated. The dependences of ∊, tg δ, and σ on the concentration (up to 10 vol%) of filler, the frequency of the electric field, and temperature were studied. It was established that the introduction into high-density polyethylene of PKR-3M segnetopiezoelectric filler of the lead zirconate titanate family has a considerable effect on the given characteristics and changes the form of the dependences tg δ(ν), tg δ(T), ∊(T), and σ(T). The variance dependence σ(ν) satisfies the condition σ ∼ ns and exhibits two linear sections with parameters S ≈ 0.8 and S > 1.2 respectively.
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