Dielectric properties of BST/polymer composite

Hu, Tao; Juuti, Jari; Jantunen, Heli; Vilkman, Taisto

doi:10.1016/j.jeurceramsoc.2007.02.082

Cited by 128 publications

(72 citation statements)

References 22 publications

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“…The prediction and measurement of the dielectric properties of composites have been a challenging issue [19,[26][27][28]. Several quantitative rules of mixture models have been proposed to calculate the dielectric permittivity of heterogeneous two-component systems considering the dielectric properties of each component [29].…”

Section: Introductionmentioning

confidence: 99%

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Reboredo

Parra

Castro

2015

Mater. Res. Express

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On the basis of theoretical predictions and experimental results, an empirical method using upper bound equation of the rule of mixtures (ROM) is reported to predict the dielectric permittivity of barium titanate nanofibers. In addition, composites with low volume fraction of BaTiO 3 fiber layers embedded in epoxy resin were prepared and characterized. The relative permittivities of composites with perpendicular and parallel configurations, with respect to the electrodes, were calculated by means of the ROM model. The predicted permittivities matched precisely the obtained experimental values.

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Section: Introductionmentioning

confidence: 99%

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Reboredo

Parra

Castro

2015

Mater. Res. Express

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“…The necessity of developing high speed computers has led to the exploration of new materials which can expend the electrical and mechanical performance limits of the presently available technology [1][2][3][4]. In the microelectronics industry low permittivity and dissipation factor, good mechanical and thermal properties are required for intermetal dielectrics, especially in printed circuit board (PCB) industry [5].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and dielectric properties of epoxy/dicyclopentadiene bisphenol cyanate ester/glass fabric composites

Wang¹,

Liang²,

Yan³

et al. 2008

Express Polym. Lett.

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Abstract. The impact and flexural strengths of epoxy-dicyclopentadiene bisphenol cyanate ester (EP-DCPDCE) hybrid thermoset as well as the interlaminar shear strength (ILSS) and flexural strength of the composites consisting of the hybrid thermoset and glass fabric were studied. It is found that the addition of epoxy resin (EP-51) can improve the mechanical properties, particularly, the impact strength of DCPDCE matrix and the ILSS of glass fabric reinforced composites. The improvements of the mechanical properties were obvious when the content of EP-51 is from 15 to 30 wt%. The investigations of the interphase of composites by scanning electron microscope (SEM) and dynamic mechanical analysis (DMA) confirm the improvement of mechanical properties of the composites. However the addition of EP-51 has negative effects on the thermal and dielectric property of the composites.

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“…Such a solution is a compromise between the processing flexibility of a polymer and the desired ferroelectric properties of BST. The fabrication and material properties of many BST/polymer composites have been reported using various polymers such as silicon-rubber [25], epoxy resin [26], polymethylmethacrylate (PMMA) [27], polyphenylene sulfide (PPS) [28], and cyclic olefin copolymer (COC) [29]. In a previous work, we reported our progress in developing tunable BST/polymer composites to fabricate printed varactors for flexible, tunable Frequency Selective Surfaces (FSSs) [30].…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of Fully Printable Conformal Antennas With BST/Polymer Composite Based Phase Shifters

Haghzadeh¹,

Jaradat²,

Armiento³

et al. 2016

PIER C

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Abstract-A fully printable and conformal antenna array on a flexible substrate with a new LeftHanded Transmission Line (LHTL) phase shifter based on a tunable Barium Strontium Titanate (BST)/polymer composite is proposed and computationally studied for radiation pattern correction and beam steering applications. First, the subject 1 × 4 rectangular patch antenna array is configured as a curved conformal antenna, with both convex and concave bending profiles, and the effects of bending on the performance are analyzed. The maximum gain of the simulated array is reduced from the flat case level by 34.4% and 34.5% for convex and concave bending, respectively. A phase compensation technique utilizing the LHTL phase shifters with a coplanar design is used to improve the degraded radiation patterns of the conformal antennas. Simulations indicate that the gain of the bent antenna array can be improved by 63.8% and 68% for convex and concave bending, respectively. For the beam steering application, the proposed phase shifters with a microstrip design are used to steer the radiation beam of the antenna array, in planar configuration, to both negative and positive scan angles, thus realizing a phased array antenna.

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Dielectric properties of BST/polymer composite

Cited by 128 publications

References 22 publications

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Mechanical and dielectric properties of epoxy/dicyclopentadiene bisphenol cyanate ester/glass fabric composites

Design and Simulation of Fully Printable Conformal Antennas With BST/Polymer Composite Based Phase Shifters

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