Impedance characterization and microwave permittivity of multi-walled carbon nanotubes/BaTiO3/epoxy composites

被引：0

作者：

Ludmila L. Vovchenko

Oleg V. Lozitsky

Ludmila Y. Matzui

Viktor V. Oliynyk

Volodymyr V. Zagorodnii

Yurii S. Milovanov

Viktor V. Garashchenko

Yurii I. Prylutskyy

机构：

[1] Taras Shevchenko National University of Kyiv,Department of Physics

[2] Taras Shevchenko National University of Kyiv,Department of Radiophysics, Electronics, and Computer Systems

[3] Institute of High Technologies,Department of Biophysics and Medical Informatics

[4] Taras Shevchenko National University of Kyiv,undefined

[5] V. Bakul Institute for Superhard Materials,undefined

[6] National Academy of Science of Ukraine,undefined

[7] Taras Shevchenko National University of Kyiv,undefined

来源：

Applied Physics A | 2020年 / 126卷

关键词：

Polymer nanocomposites; Barium titanate; Carbon nanotubes; Conductivity; Dielectric permittivity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Polymer composite materials with mixed fillers are widely investigated due to potentially superior properties they provide compared to a composite with a single filler. In this work, the electrical properties of multi-walled carbon nanotubes (MWCNT)/BaTiO3/epoxy composites are investigated using impedance measurements, modeling with equivalent circuit model, determining of alternating current conductivity in the range 10 Hz–2 MHz, permittivity measurements at frequencies 1–67 GHz, and temperature dependencies (77–290 K) of direct current conductivity. Measurements were processed to define the influence of filler combination (carbon nanotubes and BaTiO3) on dielectric properties of the epoxy composites. Nyquist diagrams indicate that all investigated composites have extensive conductive clusters. Permittivity increases monotonically with carbon nanotubes content with a steeper increase of the real part at lower frequencies.

引用

共 224 条

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