Enhanced Dielectric Properties and Low Percolation Threshold of Ternary PVDF/BT/rGO Nanocomposites

2015 ◽  
Vol 4 (4) ◽  
pp. 314-323 ◽  
Author(s):  
Guanyao Wang ◽  
Zhiwei Hu ◽  
Xingyi Huang ◽  
Pingkai Jiang
Keyword(s):  
Dielectric Properties ◽  
Percolation Threshold

scholarly journals Broadband Dielectric Properties of Fe2O3·H2O Nanorods/Epoxy Resin Composites

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Darya Meisak ◽  
Jan Macutkevic ◽  
Dzmitry Bychanok ◽  
Algirdas Selskis ◽  
Juras Banys ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Percolation Threshold ◽  
Epoxy Resin ◽  
Polymer Matrix ◽  
Finite Conductivity ◽  
Resin Composites ◽  
Electrical Percolation ◽  
Electrical Percolation Threshold ◽  
Percolation Network ◽  
Properties Of Composites

A series of polymer composites based on epoxy resin with a 5–40 vol.% concentration of goethite (Fe2O3·H2O) nanorods was produced. The electrical percolation threshold in these composites was determined as 30 vol.% of nanorods. The dielectric properties of the composites both below and above the percolation threshold were studied in a wide temperature (200 K–450 K) and frequency (from Hz to THz) ranges. The dielectric properties of composites below the percolation threshold are mainly determined by the relaxation in a pure polymer matrix. The electrical properties of composites above the percolation threshold are determined by the percolation network, which is formed by the goethite nanorods inside the polymer matrix. Due to the finite conductivity of the epoxy resin, the electrical conductivity at high temperatures occurs in the composites both above and below the percolation threshold.

scholarly journals Tuning the dielectric properties of metallic-nanoparticle/elastomer composites by strain

Nanoscale ◽  
2015 ◽  
Vol 7 (10) ◽  
pp. 4566-4571 ◽  
Author(s):  
Patrick Gaiser ◽  
Jonas Binz ◽  
Bruno Gompf ◽  
Audrey Berrier ◽  
Martin Dressel
Keyword(s):  
Dielectric Properties ◽  
Percolation Threshold ◽  
Large Range ◽  
Ag Nanoparticle ◽  
Metallic Nanoparticle ◽  
Elastomer Composites

The dielectric properties of a Ag-nanoparticle/elastomer composite are tuned by strain over a very large range. It is shown, that the percolation threshold can be crossed from the metallic into the insulating region.

scholarly journals Core–shell structured Ag@C nanocables for flexible ferroelectric polymer nanodielectric materials with low percolation threshold and excellent dielectric properties

RSC Advances ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Zhihui Chen ◽  
Hengfeng Li ◽  
Guangyou Xie ◽  
Ke Yang
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Percolation Threshold ◽  
Nanocomposite Materials ◽  
Core Shell ◽  
Ferroelectric Polymer

Flexible Ag@C-NC/PVDF nanocomposite materials with low percolation threshold and dielectric constant of 295 at 1 kHz.

Dielectric Properties of Pd/Y8Z Composites

1999 ◽  
Vol 575 ◽  
Author(s):  
Mark G.H.M. Hendriks ◽  
Henk Verwei ◽  
Manon P. Timmerman
Keyword(s):  
Dielectric Properties ◽  
Percolation Threshold ◽  
Double Layer ◽  
Low Temperatures ◽  
Room Temperature ◽  
Electronic Conductivity ◽  
Impedance Measurements ◽  
High Frequencies ◽  
A Value ◽  
Double Layer Capacity

ABSTRACTImpedance measurements are performed on Pd/Y8Z composites. At 500 'C a 2- 108 times enhancement of the permittivity of the composite at a Pd composition near the percolation threshold for electronic conductivity relative to Y8Z at room temperature is obtained. At high frequencies, the enhancement decreases to a value comparable to geometric capacity of the composite as the double-layer capacity diminishes. At relatively low temperatures the capacity of Y8Z, due to ionic polarisability, increases with temperature.

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