کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1481896 1510499 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Direct and alternating current conduction mechanisms in unidirectional PZT fibres/epoxy resin composites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Direct and alternating current conduction mechanisms in unidirectional PZT fibres/epoxy resin composites
چکیده انگلیسی

The direct current (dc) and alternating current (ac) electrical conductivities of PZT fibres/epoxy resin composites with different PZT fibres content, have been investigated in the temperature range of 80–170 °C and frequency range of 0.1–105 Hz. The charge transport mechanisms and the influence of the fibres rate on electrical conductivity properties have been studied. It was found that: first the conductivity of the composites increases with increasing the fibres content, second dc conductivity of all samples is well described by Arrhenius behavior and third the ac conductivity follows the power law σac(ω,T)=A(T)ωs(ω,T)σac(ω,T)=A(T)ωs(ω,T) which is typical for charge transport by hopping process. The observed decreasing of the frequency exponent s with increasing temperature suggests that the correlated barrier-hopping model (CBH) is the dominant mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 356, Issues 11–17, 1 April 2010, Pages 680–683
نویسندگان
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