Electrical Conductivity and Dielectric Permittivity of γ-Irradiated Nanocomposites Based on Ultrahigh-Molecular-Weight Polyethylene Filled with α-SiO2

被引：11
作者：
Ismaiilova R.S. [1 ]
Magerramov A.M. [1 ]
Kuliev M.M. [1 ]
Akhundova G.A. [2 ]
机构：
[1] Institute of Radiation Problems, Azerbaijan National Academy of Sciences, Baku
[2] Azerbaijan State Marine Academy, Baku
来源：
Surface Engineering and Applied Electrochemistry | 2018年 / 54卷 / 01期
关键词：
dielectric losses; dielectric permittivity; electrical conductivity; frequency; UHMWPE + α-SiO[!sub]2[!/sub] composite; ultrahigh-molecular-weight polyethylene (UHMWPE); γ irradiation;
D O I：
10.3103/S1068375518010076
中图分类号：
学科分类号：
摘要：
UHMWPE/SiO2 composites were obtained from a homogeneous mixture of ultrahigh-molecular- weight polyethylene (UHMWPE) and silicon dioxide (α-SiO2) by hot pressing. The temperature dependence (20–170°C) of their conductivities σdс prior to and after γ irradiation (D = 200 kGy), the effect of absorbed dose on the σdс value (dose dependence), the behavior of the function logσdc = f(T) under heating–cooling conditions, and the frequency dependences (25–106 Hz) of the real (ε') and imaginary (ε'') parts of the complex dielectric constant were studied. The logσdc = f(T) dependence was shown to have in both cases a complex pattern: “breaks” due to phase transitions were observed. With an increase in the concentration of α-SiO2, the ε' and ε'' (tanδ) values in the matrix increased and the frequency dependences of these values corresponded to an exponential rule. © 2018, Allerton Press, Inc.
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页码：6 / 11
页数：5
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