A dipolar silicone dielectric elastomer and its composite with barium titanate nanoparticles

Liu, Chunping; Liu, Ling; Yang, Dan; Zhang, Liqun

doi:10.1007/s10854-020-03690-3

Cited by 6 publications

(6 citation statements)

References 45 publications

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“…In particular, the highest permittivity values over the whole spectral range were observed for samples with filler loads of 60%. The increase in permittivity values due to BTO inclusions can be attributed to the increase in dipole content and therefore the overall polarization of the sample [32,38]. This behavior is consistent with previous reports on other BTO/polymer composites in the GHz range [33][34][35][36][37][42][43][44][45].…”

Section: Dielectric Constant Measurementssupporting

confidence: 91%

“…Given all the above, in this study, polymer-ceramic composites were produced from a simple mechanical mixture of the two components. In particular, we mixed commercially available silicone caulk, a widely used polymer with a low dielectric constant, with barium titanate (BTO) powder, a well-known ceramic with a high dielectric constant, which has been widely used in many studies to improve dielectric properties [14,[32][33][34][35][36][37][38][39][40][41][42][43][44][45]. The mechanical mixing was performed manually until a fair homogeneity was achieved.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric Behavior of Stretchable Silicone Rubber–Barium Titanate Composites

Drymiskianaki,

Katsara,

Manousaki

et al. 2024

Crystals

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In this study, elastomer composites, including silicone rubber and barium titanate, were fabricated by mechanical mixing, a low-cost, fast, and easy technique to produce highly dielectric materials. The resulting composites were investigated in terms of their dielectric and mechanical properties in terms of filler percentage in the mixture. Dielectric permittivity measurements were taken using the microwave regime, and uniaxial tensile tests were carried out for the study of the materials’ mechanical properties, while combined experiments were also carried out to investigate potential correlations between them. The experimental results show that barium titanate inclusions in silicone matrix significantly improve the dielectric constant while reducing the mechanical properties of composites. In addition, combined experiments show that the composites exhibit a nearly stable dielectric profile under mechanical deformations. Consequently, mechanically mixed barium titanate–silicone elastomer composites could potentially become a cost-effective alternative in the extensive market for insulating materials and flexible electronics.

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Section: Dielectric Constant Measurementssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Dielectric Behavior of Stretchable Silicone Rubber–Barium Titanate Composites

Drymiskianaki,

Katsara,

Manousaki

et al. 2024

Crystals

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“…A considerable amount of energy is lost due to the restriction of alignments by other dipole effects. Moreover, ionic, electronic, and dipolar losses are present in all samples at low frequencies resulting in a substantial loss in that range [104,105]. At higher frequencies, tanδ E has extremely tiny values, indicating that the dipoles having tiny effective masses (e.g., ferroelectric, electrons domains) assist the majority of the dielectric constant rather than Defects in charge (i.e., oxygen vacancies) having significant effective masses [106].…”

Section: Frequency-dependent Dielectric Constant Measurementmentioning

confidence: 92%

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Mahmud

Ahamed

Khan

2022

Mater. Res. Express

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In this research, structural, magnetic, electrical, and optical properties of Al3+ substituted Ba0.6Sr0.4Ti1-xAlxO3 ceramics (where x = 0.00 to 0.20) have been investigated and discussed. The ceramic samples have been successfully synthesized by the conventional solid-state reaction method. The crystallinity of the prepared samples has been confirmed by X-ray peak broadening techniques such as the Williamson Hall (W-H) plot technique and the Scherrer method. The lattice constant "a", showing a significant drop as Al concentration increases, varies from 3.9420A to 3.9210A. The FTIR spectrum revealed a prominent peak between 435 cm−1 to 540 cm−1, without showing any secondary phase. Raman spectroscopic analysis showed that the prepared samples are in cubic phase with no phase transition. The shifting of a dominating peak in Raman at 580 cm-1 is due to the development of AlTi defects. VSM analysis at room temperature showed the ferromagnetic characteristics of all the samples. The highest value of the anisotropic constant (Ka~39.933 emu/cm3) has been seen at x=0.10. The real component of initial permeability is almost constant for the frequency range of about 75 MHz, and above this frequency range, it quickly reduces. At the high-frequency range, the prepared samples show an excellent relative quality factor due to the low dielectric loss, notably when x = 0.05. The prepared perovskites exhibited minimum eddy current loss characteristics due to the increment of AC resistivity at x=0.20. UV–visible spectroscopy shows a significant change in the energy bandgap from 3.23 eV to 3.04 eV with the doping concentrations.

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“…PVP@PANI fillers were prepared by surface physical modification, as reported by Liu et al [ 30 ]. A total of 5 g of PANI was dissolved in 50 mL of ethanol provided by Qingdao Eurasia Chemical Technology Development Co., Ltd (Qingdao, China) and ultrasonicated for 1 h, then 0.25 g of PVP was dissolved in 40 mL of ethanol and ultrasonicated for 1 h. The PVP-ethanol solution was mixed with PANI-ethanol solution.…”

Section: Methodsmentioning

confidence: 99%

High-Dielectric PVP@PANI/PDMS Composites Fabricated via an Electric Field-Assisted Approach

et al. 2022

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Polymer-based composite films with multiple properties, such as low dielectric loss tangent, high dielectric constant, and low cost are promising materials in the area of electronics and electric industries. In this study, flexible dielectric films were fabricated via an electric field-assisted method. Polyaniline (PANI) was modified by polyvinylpyrrolidone (PVP) to form a core–shell structure to serve as functional particles and silicone rubber polydimethylsiloxane (PDMS) served as the matrix. The dielectric constant of the composites prepared under electric fields was improved by the micro-structures formed by external electric fields. With the addition of 2.5 wt% PVP@PANI, the dielectric constant could be significantly enhanced, up to 23; the dielectric loss tangent is only 1, which is lower than that of the aligned PANI samples. This new processing technology provides important insights for aligning fillers in polymer matrix to form composites with enhanced dielectric properties.

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A dipolar silicone dielectric elastomer and its composite with barium titanate nanoparticles

Cited by 6 publications

References 45 publications

Dielectric Behavior of Stretchable Silicone Rubber–Barium Titanate Composites

Dielectric Behavior of Stretchable Silicone Rubber–Barium Titanate Composites

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

High-Dielectric PVP@PANI/PDMS Composites Fabricated via an Electric Field-Assisted Approach

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A dipolar silicone dielectric elastomer and its composite with barium titanate nanoparticles

Cited by 6 publications

References 45 publications

Dielectric Behavior of Stretchable Silicone Rubber–Barium Titanate Composites

Dielectric Behavior of Stretchable Silicone Rubber–Barium Titanate Composites

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba0.6Sr0.4Ti1-xAlxO3 ceramics via Sr and Al Co-doping engineering

High-Dielectric PVP@PANI/PDMS Composites Fabricated via an Electric Field-Assisted Approach

Contact Info

Product

Resources

About

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering