Dielectric properties of epoxy resin–barium titanate composites at high frequency

Cheng, Kuo‐Chung; Lin, Chien‐Ming; Wang, Sea-Fue; Lin, Shun‐Tian; Yang, Chang‐Fa

doi:10.1016/j.matlet.2006.05.061

Cited by 85 publications

(46 citation statements)

References 14 publications

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“…The loss factor of all the tested composites is below 0.006, only an order of magnitude higher than that of the neat polymer. In the literature, 20 vol% of BaTiO 3 particles usually double the dielectric constant of pure polymer, which is similar to the effect of the lowest aspect ratio fiber in this work [4,5,20,21].…”

Section: Dielectric Sepctroscopy Of Compositessupporting

confidence: 82%

“…The dielectric constant increased from 3 to 6.5 for the composites filled with 20 vol% of the lowest aspect ratio fibers (AR=3). The relative dielectric constant increase over the neat polymer is comparable to that of composites filled with spherical or irregular BaTiO 3 particles reported in the literature [4][5][6]. Meanwhile, the high aspect ratio fiber (AR=15) leads to a significant increase in the composite relative dielectric constant to 12.…”

Section: Dielectric Sepctroscopy Of Compositessupporting

confidence: 71%

“…However, the ability of spherical particles to increase the dielectric constant is small at low volume fractions according to the rule of mixtures [3]. Higher volume fractions lead to increased dielectric constant, but also to a reduction in electrical breakdown strength and mechanical properties [4][5][6][7]. Composites with high aspect ratio (AR) fillers are predicted to exhibit higher dielectric constant at lower loading [3], thereby potentially maintaining the mechanical properties and dielectric breakdown strength [5].…”

Section: Introductionmentioning

confidence: 99%

“…Higher volume fractions lead to increased dielectric constant, but also to a reduction in electrical breakdown strength and mechanical properties [4][5][6][7]. Composites with high aspect ratio (AR) fillers are predicted to exhibit higher dielectric constant at lower loading [3], thereby potentially maintaining the mechanical properties and dielectric breakdown strength [5]. High aspect ratio fillers, however, have not been studied as extensively as their spherical counterparts because of challenges in manufacturing high aspect ratio ferroelectric fillers [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Effect of high aspect ratio filler on dielectric properties of polymer composites: a study on barium titanate fibers and graphene platelets

Wang

Nelson

Miao

et al. 2012

IEEE Trans. Dielect. Electr. Insul.

104

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High aspect ratio fillers are predicted to increase the dielectric constant of polymer composites more efficiently than spherical fillers according to the rule of mixtures. Using high aspect ratio fillers is a promising route for creating high dielectric constant, low loss materials at a low filler volume fraction, for use as capacitor and electric field grading materials. In this work, two high aspect ratio fillers were mixed into a polymer matrix, and the dielectric properties of composites were studied. Barium titanate fibers were synthesized by electrospinning a sol-gel, followed by a heat treatment to obtain a perovskite crystal structure. The heat treatment conditions were found to be crucial for obtaining tetragonal barium titanate fibers with high dielectric constant. Graphene platelets were prepared by a thermal shock method, which was found to result in a larger dielectric constant. A combination of barium titanate and graphene platelets yielded the highest dielectric constant when used in a polydimethyl siloxane matrix. The increase in dielectric loss over the pure matrix was small when the volume fraction was below the percolation threshold of graphene platelets. Electric flux density-electric field (D-E) measurements showed a linear dielectric constant in barium titanate filled composites and higher loss when graphene was added. The ac breakdown strength was reduced compared to the neat polymer and was affected by filler aspect ratio. The mechanisms that lead to the observed phenomena are discussed.

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Section: Dielectric Sepctroscopy Of Compositessupporting

confidence: 82%

Section: Dielectric Sepctroscopy Of Compositessupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of high aspect ratio filler on dielectric properties of polymer composites: a study on barium titanate fibers and graphene platelets

Wang

Nelson

Miao

et al. 2012

IEEE Trans. Dielect. Electr. Insul.

104

View full text Add to dashboard Cite

show abstract

“…value reaches to 31.4, being ~3.5 times higher than that of neat PVDF. Theoretically, the dielectric responses of ceramic-polymer systems can be described by the logarithmic mixing rule and Maxwell-Garnett approximation [6,10,11]. Logarithmic mixing rule simply relates the permittivity of a composite to a combined dielectric effect of its individual constituents, see Equation (1):…”

Section: Structural and Electrical Measurementsmentioning

confidence: 99%

Dielectric properties of binary polyvinylidene fluoride/barium titanate nanocomposites and their nanographite doped hybrids

Li¹,

Tjong²,

Li³

2011

Express Polym. Lett.

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Abstract. Binary polyvinylidene fluoride/barium titanate (PVDF/BaTiO 3 ) and its nanographite (GN) doped ternary nanocomposites were fabricated using a simple solution casting process followed by compression molding. The dielectric behavior of such hybrids over a wide frequency range was studied. Additions of GN with contents close to the percolation threshold were found to be very effective to enhance dielectric permittivity of the PVDF/BaTiO 3 nanocomposites. In this regard, the electrical behavior of ternary PVDF/BaTiO 3 /GN hybrids can be explained in terms of the percolation theory. Furthermore, both dielectric constant and electrical conductivity of hybrids were found to be strongly frequency and temperature dependent.

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Dielectric Properties of Elastomeric Modified Epoxies

Kumar

Kalyani

Dutt

2014

Micro‐ and Nanostructured Epoxy/Rubber Blends

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Dielectric properties of epoxy resin–barium titanate composites at high frequency

Cited by 85 publications

References 14 publications

Effect of high aspect ratio filler on dielectric properties of polymer composites: a study on barium titanate fibers and graphene platelets

Effect of high aspect ratio filler on dielectric properties of polymer composites: a study on barium titanate fibers and graphene platelets

Dielectric properties of binary polyvinylidene fluoride/barium titanate nanocomposites and their nanographite doped hybrids

Dielectric Properties of Elastomeric Modified Epoxies

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