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Issue 15, 2012
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Tunable wave absorption properties of β-MnO2 nanorods and their application in dielectric composites

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Abstract

A new kind of β-MnO2 nanorod (NR)–poly(vinylidene fluoride) (PVDF) functional composite with a high dielectric constant can be prepared by addition of β-MnO2 NRs to PVDF. The microwave absorption properties of β-MnO2 NRs, which were synthesized by a simple hydrothermal method on a large scale at low temperature, have been investigated for their applications in dielectric composites. It is found that the absorbers filled with β-MnO2 NRs possess excellent microwave absorption properties, and the minimum reflection loss (RL) can be adjusted to different frequencies in the range 4–14 GHz by controlling the thickness of the β-MnO2 NR–PVDF composite. The composite has a significantly high dielectric constant and good thermal stability, with quite a low percolation threshold. The dielectric constant can reach as high as 862 when the concentration of β-MnO2 nanorod filler reaches 7 vol% at 102 Hz.

Graphical abstract: Tunable wave absorption properties of β-MnO2 nanorods and their application in dielectric composites

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Article information


Submitted
13 Jan 2012
Accepted
19 Apr 2012
First published
26 Apr 2012

RSC Adv., 2012,2, 6216-6221
Article type
Paper

Tunable wave absorption properties of β-MnO2 nanorods and their application in dielectric composites

G. Wang, L. Nie and S. Yu, RSC Adv., 2012, 2, 6216
DOI: 10.1039/C2RA20081C

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