Characterization and dielectric properties of modified Ba0.6Sr0.4TiO3/poly(vinylidene fluoride) composites with high dielectric tunability

Zhang, Qingqing; Gao, Feng; Hu, Guoxin; Zhang, Chaochao; Wang, Min; Qin, Mengjie; Wang, Li

doi:10.1016/j.compscitech.2015.08.013

Cited by 33 publications

(8 citation statements)

References 26 publications

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“…9 and Table 1. Compared with the previously reported data [16][17][18], the results show that the dielectric strengths of the nanocomposites are enhanced greatly which derived from increased blocking effects of the interfaces. In addition, the dielectric strength rapid decreases from 287.12 to 158.2 kV/mm with increasing the contents of BST nanoparticles.…”

Section: Energy Storage Density Of Bst/pvdf Nanocompositescontrasting

confidence: 69%

“…Moreover, it has been demonstrated that the disadvantage can be improved via advanced preparation technology of composites or modification of particle fillers. The results shown that these methods also can contribute to the enhancement of dielectric tunability [16–18]. However, the rise of dielectric strength of the composites is not particularly evident.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication, characterisation and dielectric properties of KH550 modified BST/PVDF nanocomposites with high dielectric strength

et al. 2016

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Ba 0.6 Sr 0.4 TiO 3 (BST)/poly(vinylidene fluoride) (PVDF) 0-3 nanocomposites with BST nanoparticle contents of 10-40 vol% were prepared by tape casting method. The BST nanoparticles with ∼60 nm crystal size and accurate atomic ratio were synthesised by sol-gel method. The effect of the BST nanoparticle contents on the microstructure and dielectric properties of BST/PVDF nanocomposites were investigated. The BST/PVDF nanocomposites system declares that feasibility of applying low contents nanoparticles to form a homogeneous distribution in polymer matrix, higher dense interface connectivity, thereby providing a significant improvement to the dielectric strength and energy storage density; meanwhile, the nanocomposites possess high dielectric tunability. In this study, the maximum dielectric strength ∼287.12 kV/mm and energy storage density ∼5.15 J/cm 3 were obtained in 10 vol% BST/PVDF nanocomposites, respectively. Moreover, the nanocomposite possesses high dielectric tunability ∼62.6% at 58 kV/mm, which proposed the nanocomposites suitable for tunable microwave devices, supercapacitors and energy storage device applications at high-voltage environment. 2 Experimental procedure 2.1 Materials The following materials are used to prepare the BST/PVDF nanocomposites. Acetic acid glacial (C 3 COOH, AR, ≥99.5%) and ethanol (C 2 H 6 O, AR, ≥99.7%) were purchased from Tianjin Fuyu Fine Chemical Co., Ltd. Sr acetate [Sr(C 2 H 3 O 2) 2 , AR, ≥99.0%], Ba acetate [(Ba(C 2 H 3 O 2) 2 , AR, ≥99.0%] and tetrabutyl titanate (Ti [OCH(CH 3) 2 ] 4 , chemically pure reagent (CP), ≥98.0%) were supplied by Sinopharm Chemical Reagent Co., Ltd. N, N-dimethyl formamide (DMF) (AR, ≥99.5%) was provided by Guangdong Guanghua Sci-Tech Co., Ltd. PVDF polymer was obtained from Shanghai 3F New Materials Co., Ltd. 2.2 Preparation of KH550 modified BST nano-powders The BST nano-powder were prepared by sol-gel method. Stoichiometric amount of Ba(C 2 H 3 O 2) 2 , Sr(C 2 H 3 O 2) 2 and Ti[OCH High Voltage

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Section: Energy Storage Density Of Bst/pvdf Nanocompositescontrasting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Fabrication, characterisation and dielectric properties of KH550 modified BST/PVDF nanocomposites with high dielectric strength

et al. 2016

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“…Recently, Ba 1−x Sr x TiO 3 (BST)/poly(vinylidene fluoride) (PVDF) composites have been widely studied because of their high dielectric constant, low dielectric loss, as well as the ease of processing and potential applications in dielectric capacitors and high power electric energy storage devices [1][2][3][4]. Li et al [1] reported that the relative permittivity of Ba 0.6 Sr 0.4 TiO 3 /@Ag/ PVDF nanocomposites could be significantly increased through functionalising the surface of Ba 0.6 Sr 0.4 TiO 3 nanoparticles via silver coating.…”

Section: Introductionmentioning

confidence: 99%

“…Additional, Ba 0.6 Sr 0.4 TiO 3 /PVDF composites showed dielectric tunability under a DC bias voltage. Zhang et al [3,5] prepared Ba 0.6 Sr 0.4 TiO 3 /PVDF composites with a high dielectric tunability (10.9% under a DC bias of 1.0 kV/mm) and energy density (5.28 J/cm 3 at 146 kV/mm). In our previous work, the dielectric tunability of Ba 0.6 Sr 0.4 TiO 3 /PVDF composites was systematically studied through establishing a dielectric tunability theoretical model [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and dielectric properties of sub‐micron hollow sphere (Ba _0.6 Sr _0.4 )TiO ₃ /PVDF composites

Guo

Zhang

Meng

et al. 2019

IET Nanodielectrics

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Hollow sphere (Ba 0.6 Sr 0.4)TiO 3 (HS-BST) powders with sub-micron size and different shell thickness were synthesised through template-assisted method. HS-BST/poly(vinylidene fluoride) (PVDF) composites were prepared using tape casting method. The effects of particle size and shell thickness of HS-BST on the microstructure, dielectric tunability, and energy storage properties of HS-BST/PVDF composites were investigated. Results showed that all HS-BST particles were uniformly dispersed in PVDF matrix without agglomeration. With decreasing the size of HS-BST particles, the dielectric constant and loss of HS-BST/PVDF composites decreased, while the breakdown strength initially decreased and then increased. In addition, the theoretical model of the dielectric tunability of inorganic/organic system related to the shape factor (n) of inorganic particles was used to simulate and n value of 0-dimensional spherical particles was estimated. For HS-BST/PVDF composite, the n in the model was 2-2.5, corresponding to HS-BST particles with a diameter ranging from 0.44 to 2.57 μm, and a shell thickness ranging from 40 to 500 nm.

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“…In recent years, conductive fillers have been added to polymer-based composites to develop high-performance dielectric polymers (high dielectric permittivity and low loss tangent), such as carbon nanotubes [14,15], graphite [16,17], metal particles [18,19], and conductive oxides [20,21,22]. Generally, higher dielectric permittivities can be achieved in composites by adding these particles, however, unexpected loss tangents are also found, especially under high temperature and frequency.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Method Charactering the Electromechanical Properties of Particle Reinforced Composite Based on Statistics

Chang

Wang

2018

Polymers

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A novel model for a network of polymer chains is proposed considering the distribution of polymer chains inside the composite in this work. Some factors that influence the distribution of polymer chains are quantitatively investigated, such as external surface geometry, internal filler, and local deformation. Furthermore, the Maxwell stress induced by an electric field is characterized by the statistics of local charge density, as the basic analyzing electromechanical properties of materials. In particular, taking the non-uniform distribution of polymer chains into account, the electromechanical properties of two materials—VHB 4910 and CaCu3Ti4O12-polydimethylsiloxane (CCTO-PDMS)—are investigated to validate the applicability of the proposed model. The comparison between simulation results and experimental results from existing literature shows that the model was successfully employed to predict the electromechanical properties of polymer composites.

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Characterization and dielectric properties of modified Ba0.6Sr0.4TiO3/poly(vinylidene fluoride) composites with high dielectric tunability

Cited by 33 publications

References 26 publications

Fabrication, characterisation and dielectric properties of KH550 modified BST/PVDF nanocomposites with high dielectric strength

Fabrication, characterisation and dielectric properties of KH550 modified BST/PVDF nanocomposites with high dielectric strength

Microstructure and dielectric properties of sub‐micron hollow sphere (Ba _0.6 Sr _0.4 )TiO ₃ /PVDF composites

A Numerical Method Charactering the Electromechanical Properties of Particle Reinforced Composite Based on Statistics

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Characterization and dielectric properties of modified Ba0.6Sr0.4TiO3/poly(vinylidene fluoride) composites with high dielectric tunability

Cited by 33 publications

References 26 publications

Fabrication, characterisation and dielectric properties of KH550 modified BST/PVDF nanocomposites with high dielectric strength

Fabrication, characterisation and dielectric properties of KH550 modified BST/PVDF nanocomposites with high dielectric strength

Microstructure and dielectric properties of sub‐micron hollow sphere (Ba 0.6 Sr 0.4 )TiO 3 /PVDF composites

A Numerical Method Charactering the Electromechanical Properties of Particle Reinforced Composite Based on Statistics

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Microstructure and dielectric properties of sub‐micron hollow sphere (Ba _0.6 Sr _0.4 )TiO ₃ /PVDF composites