Comparison of theoretical predictions and experimental values of the dielectric constant of epoxy/BaTiO3 composite embedded capacitor films

Cho, Sung-Dong; Lee, Sang-Yong; Hyun, Jin-Gul; Paik, Kyung‐Wook

doi:10.1007/s10854-005-6454-3

Cited by 92 publications

(83 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dielectric measurements were performed on a type-1296 dielectric interface connected to an SI-1255 HF frequency response analyzer from Solarton analytical (UK). All the measurements were performed in the frequency range of 1-10 6 Hz under room temperature. The dielectric strength of the samples was measured using a ball-rod electrode arrangement according to GB/T1408.1-99, with the alternative current of 50 kV and 50 Hz.…”

Section: Measurementsmentioning

confidence: 99%

“…[3][4][5] The advantages of such composites include a predictable dielectric constant, a low loss factor, and an easy fabrication. 6 However, the K-value requirements (i.e., K < 100) for the composites could not be satisfied due to the low bulk dielectric constant of the polymer matrix (<10), as well as the high ceramic loadings (>50 vol %) deteriorating the mechanical properties of the resulting composites. However, when using a percolation theory for the conductor-insulator composites, the observation of a dramatic increase in the K value close to the percolation threshold has attracted great interest.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Expanded graphite–epoxy composites with high dielectric constant

Xie

Chen

et al. 2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

Composites of an expanded graphite/diglycidyl ether of bisphenol A (DGEBA) were prepared by a simple melt blending method, and their dielectric and mechanical properties were investigated. During observations of fractured surfaces of the composites, the graphite sheets were seen to be homogeneously dispersed in the epoxy matrix. Moreover, the composites presented an enhanced dielectric constant ($ 180) and a low loss factor ($ 0.05) at 50 Hz, suggesting their potential suitability for embedded dielectric applications. The enhanced dielectric constant can be explained by the percolation theory and the relatively low loss factor was attributed to strong interfacial interactions between the polymer molecules and the AOH/ACOOH groups of the expanded graphite, which constrained the orientational polarization of the polarons. Furthermore, dynamic mechanical analysis of the composites showed a restricted macromolecular relaxation and improved mechanical properties.

show abstract

Section: Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Expanded graphite–epoxy composites with high dielectric constant

Xie

Chen

et al. 2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Modified RotherLichtenecker model, 18) which is based on the RotherLichtenecker equation, 19) one representation of logarithmic law of mixing for a chaotic or statistical mixture, is demonstrated as:…”

Section: Dielectric Constant Loss Tangent Of Dopamine@bczt/pvdf Compmentioning

confidence: 99%

[Retracted Article] Performance of Ba0.95Ca0.05Zr0.15Ti0.85O3/PVDF composite flexible films

Wang

Peng

2014

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

Calcium barium zirconate titanate (Ba 0.95 Ca 0.05 Zr 0.15 Ti 0.85 O 3 , BCZT) ceramic particles were obtained by conventional ceramic processing method. BCZT powders were modified by dopamine through chemical coating method. The composite films based on dopamine@BCZT and polyvinylidene fluoride were fabricated by solution casting method. The microstructure and morphology were characterized by X-ray diffraction, high-resolution transmission electron microscopy, and field emission scanning electron microscope. The impedance analyzer and dielectric withstand voltage test were used to test the dielectric constant, loss tangent, and breakdown strength. TEM results displayed that dopamine was coated on the surface of BCZT particles uniformly with an average thickness of 20 nm. SEM results revealed that the ceramic particles were dispersed homogeneously in the matrix. The dielectric constant increased with the increasing of BCZT contents, while the loss tangent remained constant in the frequency range of 10 3 to 10 5 Hz.

show abstract

“…Several theoretical 50 models are available to predict the dielectric properties of composite systems, and their validity tested by curve fitting to experimental data [11,17,18,19,20,21]. It is worth noting that conclusions are rarely drawn on which model is superior to another in giving better fitting to this experimental data.…”

mentioning

confidence: 99%

“…This is a useful procedure because the dielectric constant of nanometer sized ceramic particles is expected to deviate significantly from that measured in bulk ceramics due to the three dimensional clamping effect in bulk ceramics [1]. For 60 instance, from data fitting using the Lichtenecker [22] and Jayasundere & Smith [20] equations dielectric constant values an order of magnitude lower have been reported at 100 kHz for barium titanate particles (282 for 0.25 µm particles) than for bulk ceramics (∼2000) [17]. In our work, the Lichtenecker equation was used to fit the measured dielectric constants of PFA/BT nanocomposite 65 films at 10 kHz and 15 GHz to allow us to estimate the dielectric constant of the nanometer sized barium titanate particles.…”

mentioning

confidence: 99%

Preparation, microstructure and microwave dielectric properties of sprayed PFA/barium titanate composite films

Qin

Dancer

Grovenor

et al. 2016

Composites Science and Technology

View full text Add to dashboard Cite

Frequency dependence of the dielectric properties of polymer-ferroelectric composites at different bands of microwave frequencies was investigated in this work.Perfluoroalkoxy (PFA) / barium titanate (BaTiO 3 ) nanocomposite films were prepared by spray deposition. The spraying process was scaled up to fabricate large area (max. 160 mm x 160 mm) uniform composite sheets out of which a controlled bonding process was introduced to form composite blocks.The microstructure of the composite films was examined by SEM with a microtome sample preparation method to evaluate the effectiveness of the spraying process at producing uniform particle distributions. The dielectric properties of the composite films with various BaTiO 3 loadings were characterised by an Impedance Analyzer at frequencies between 10 Hz and 1 MHz and Vector Network Analyzer at 12 -18 GHz respectively. The Lichtenecker mixing rule was incorporated to fit the measured dielectric constant data, which gives estimates of dielectric constant of the BaTiO 3 nanometer sized particles to be 895 and 571 at 10 kHz and 15 GHz respectively. In comparison, the composite effective dielectric constant was approximately reduced by 25% at 10 kHz than that at 15 GHz.

show abstract

Comparison of theoretical predictions and experimental values of the dielectric constant of epoxy/BaTiO3 composite embedded capacitor films

Cited by 92 publications

References 11 publications

Expanded graphite–epoxy composites with high dielectric constant

Expanded graphite–epoxy composites with high dielectric constant

[Retracted Article] Performance of Ba<sub>0.95</sub>Ca<sub>0.05</sub>Zr<sub>0.15</sub>Ti<sub>0.85</sub>O<sub>3</sub>/PVDF composite flexible films

Preparation, microstructure and microwave dielectric properties of sprayed PFA/barium titanate composite films

Contact Info

Product

Resources

About