Broadband dielectric and conductivity spectroscopy of inhomogeneous and composite conductors

Petzelt, J.; Nuzhnyy, D.; Bovtun, V.; Savinov, M.; Kempa, M.; Rychetský, I.

doi:10.1002/pssa.201329288

Cited by 52 publications

(30 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to inverse Swiss‐cheese model, when conducting fillers disperse in insulating matrix, the conduction process is dominated by inter‐particle tunneling. The dielectric constant and loss increase with increasing filler content and an abrupt raise is found near percolation threshold . This can be understood by the minicapacitor model.…”

Section: Resultsmentioning

confidence: 84%

Enhanced dielectric properties of polyvinylidene fluoride with addition of SnO₂ nanoparticles

Liu

Wang

Zhu

2016

Physica Rapid Research Ltrs

View full text Add to dashboard Cite

In this letter, SnO2/polyvinylidene fluoride (PVDF) nanocomposites with outstanding dielectric properties were fabricated. The SEM and TEM images showed that SnO2 nanoparticles with size of 5–7 nm dispersed homogeneously in polymer matrix. The significantly improved dielectric constant was well explained by percolation theory. The nanocompo‐ sites can retain a certain value of breakdown field. The maximum energy density of SnO2/PVDF nanocomposites was 5.4 J/cm3, two times that of the pure polyvinylidene fluoride. These findings suggest that SnO2/PVDF nanocomposites are suitable candidates for energy storage applications. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)

show abstract

Section: Resultsmentioning

confidence: 84%

Enhanced dielectric properties of polyvinylidene fluoride with addition of SnO₂ nanoparticles

Liu

Wang

Zhu

2016

Physica Rapid Research Ltrs

View full text Add to dashboard Cite

show abstract

“…Generally, dielectric and conductivity spectra of the opalbased nanocomposites are similar to that of conductor-dielectric composites with the concentration of a conductive phase above (sample 324), near or below (samples 216, 328 and 323) the percolation threshold (for instance, see [26], [27]). Experimental dielectric and AC conductivity spectra usually reveal broadband dispersions and can be fitted with a set of Cole-Cole relaxations and Drude conductivity.…”

Section: Spectra Of Dielectric Permittivity Of Rare-earth Nanocommentioning

confidence: 93%

“…The quasi-optical THz measurements were completed with complex permittivity calculations based on the Maxwell's equations. More details and references on the used method are in [7], [18], [26], [27].…”

Section: Spectra Of Dielectric Permittivity Of Rare-earth Nanocommentioning

confidence: 99%

High-Frequency Dielectric Properties of Nanocomposite and Ceramic Titanates

Ринкевич

Кузнецов

Перов

et al. 2015

IEEE Trans. Nanotechnology

Self Cite

View full text Add to dashboard Cite

A set of ferroelectric and related titanate ceramics and nanocomposites were prepared and their dielectric and electromagnetic properties were studied in a broad frequency range, including microwave, millimeter-wave and THz frequencies. Dielectric and conductivity spectra of the opal-matrix nanocomposites were typical for conductor-dielectric composites and could be described by Cole-Cole relaxations and Drude conductivity. The highest values of microwave dielectric permittivity, losses and conductivity were observed in the composite with Pr 2 Ti 2 O 7 nanoparticles. Absorption properties of ceramic and some composite titanates were measured and estimated in the microwave range. Some of the studied compositions were found to be interesting for development of microwave absorbing or shielding materials.Index Terms-Electromagnetic waveguide, opal matrix, transmission and reflection coefficients, microwave conductivity, dielectric spectra.

show abstract

“…Specific characterizations such as Electron Paramagnetic Resonance and the broadband dielectric spectroscopy (in the high-frequency range up to the infra-red) will be highlighted. Both techniques are particularly well suited to probe defect structure and interfaces in inhomogeneous materials exhibiting different bulk and grain boundary properties as well as in nanostructured ceramics with components of different dielectric properties [12][13][14]. Finally, illustrations of the core-shell approach to design multiferroic nanocomposites will be presented.…”

Section: Methodsmentioning

confidence: 99%

Specific core-shell approaches and related properties in nanostructured ferroelectric ceramics

et al. 2018

View full text Add to dashboard Cite

Interfaces are a major issue when designing ferroelectric nanostructured materials with tailored properties. In a context of integration and multifunctionality in the field of electronics, several strategies have been developed to control the microstructure and defect chemistry of interfaces that strongly impact the macroscopic properties. The suitability of the core-shell approaches that allow a subtle tuning of interface phenomena at different scales has been widely demonstrated. We focus here on the flexibility of the core-shell approach devoted to the processing of nanostructured ferroelectric composites. Our strategy relies on the use of advanced synthesis processes to design ferroelectric grains coated with shells of different nature, morphology and crystallinity. Typical examples will be reviewed with a specific attention on their impact on both microstructure and dielectric properties. Our approach, based also on the use of fast sintering technique, provides a guidance to design 3D bulk nanostructured ferroelectrics while controlling and/or exploiting size, interface and defects chemistry. The contribution of specific spectroscopies to probe interfacial chemistry and defects is underlined. The high density of interfaces in core-shell materials is obviously an advantage to target additional functionality such as magneto-electric coupling. This is illustrated in 3D composites and one dimensional nanostructures that coaxially combine electric and magnetic materials. The core-shell approach described here could be transferred to a much broader range of materials covering many functionalities provided a deeper understanding of the interfaces at the atomic scale is achieved and a further development of low temperature processing is reached.

show abstract

Broadband dielectric and conductivity spectroscopy of inhomogeneous and composite conductors

Cited by 52 publications

References 44 publications

Enhanced dielectric properties of polyvinylidene fluoride with addition of SnO₂ nanoparticles

Enhanced dielectric properties of polyvinylidene fluoride with addition of SnO₂ nanoparticles

High-Frequency Dielectric Properties of Nanocomposite and Ceramic Titanates

Specific core-shell approaches and related properties in nanostructured ferroelectric ceramics

Contact Info

Product

Resources

About

Broadband dielectric and conductivity spectroscopy of inhomogeneous and composite conductors

Cited by 52 publications

References 44 publications

Enhanced dielectric properties of polyvinylidene fluoride with addition of SnO2 nanoparticles

Enhanced dielectric properties of polyvinylidene fluoride with addition of SnO2 nanoparticles

High-Frequency Dielectric Properties of Nanocomposite and Ceramic Titanates

Specific core-shell approaches and related properties in nanostructured ferroelectric ceramics

Contact Info

Product

Resources

About

Enhanced dielectric properties of polyvinylidene fluoride with addition of SnO₂ nanoparticles

Enhanced dielectric properties of polyvinylidene fluoride with addition of SnO₂ nanoparticles