BaTiO3–polyethersulfone nanocomposites with high dielectric constant and excellent thermal stability

Wang, F.J.; Li, W.; Xue, Mingshan; Yao, Junping; Lu, Junjie

doi:10.1016/j.compositesb.2010.08.006

Cited by 47 publications

(22 citation statements)

References 19 publications

(20 reference statements)

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“…For example, dielectric constant of 20 wt % SrTiO 3 ‐filled PEEK composite was about 4.8 . Similarly approximate threefold increment is observed in case of BT‐filled PES composite at 20 vol % loading . In this study threefold improvements in value of dielectric constant is obtained at 18 vol % loading of BT in the PEK matrix.…”

Section: Resultssupporting

confidence: 74%

Thermomechanically stable dielectric composites based on poly(ether ketone) and BaTiO₃ with improved electromagnetic shielding properties in X‐band

Chauhan

Verma

Malik

et al. 2018

J of Applied Polymer Sci

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High‐performance barium titanate (BaTiO3) filled poly(ether ketone) (PEK) composites were prepared by melt compounding with an aim to investigate the effect of BaTiO3 on thermal, thermomechanical, dielectric, and electromagnetic interference shielding behavior of PEK. The content of BaTiO3 in the PEK matrix was varied from 0 to 18 vol %. Scanning electron microscopy studies shows that BaTiO3 particles were uniformly distributed in the PEK matrix up to 13 vol % loading followed by the formation of agglomerates at higher loading (18 vol %). Rockwell hardness increased up to 13 vol % loading followed by a decrease at 18 vol % loading. Dynamic mechanical analysis revealed that storage modulus increases with increase in BaTiO3 loading with a maximum value of 3192 MPa at 13 vol % compared to 2099 MPa for neat PEK. Dielectric constant of composites measured in the frequency range of 8.2–12.4 GHz increased approximately three times upon incorporation of 18 vol % of BaTiO3. This increment in dielectric constant is reflected in improved electromagnetic shielding properties as loading of dielectric filler (BaTiO3) increases. Total shielding effectiveness of −11 dB (∼92% attenuation) at loading of 18 vol % BaTiO3 justifies the use of these composites for suppression of EM radiations. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46413.

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Section: Resultssupporting

confidence: 74%

Thermomechanically stable dielectric composites based on poly(ether ketone) and BaTiO₃ with improved electromagnetic shielding properties in X‐band

Chauhan

Verma

Malik

et al. 2018

J of Applied Polymer Sci

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“…Up to now, many dielectric ceramics such as BaTiO 3 [3][4][5][6][7][8][9][10], BaSrTiO 3 [11], Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 [12] and CaCu 3 Ti 4 O 12 (CCTO) [13][14][15][16][17][18] have been used as fillers in polymer matrix due to the high dielectric permittivity. Na 0.5 Bi 0.5 Cu 3 Ti 4 O 12 (NBCTO), similar to CCTO, is a leadfree material with pseudo-perovskite structure and no piezoelectric effect, which also exhibits a colossal dielectric permittivity of about 10 4 and dielectric loss as low as 0.1 at room temperature [19,20].…”

Section: Introductionmentioning

confidence: 99%

Improved dielectric permittivity of NBCTO/epoxy composite films with low dielectric loss

Wang

2019

SN Appl. Sci.

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In this paper, NBCTO/epoxy composite films with different contents of NBCTO were prepared by solution mixing and casting method. The structure, morphology, thermostability and dielectric properties of the composite films were studied by X-ray diffraction, scanning electron microscopy, thermo-gravimetric analysis and broadband dielectric spectrometer. The composite film showed a homogeneous structure and better thermostability, and the dielectric permittivity was almost independent of the frequency range from 10 to 10 6 Hz at room temperature. The dielectric permittivity and dielectric loss of NBCTO/epoxy composite film increased with increasing in NBCTO content, and the dielectric permittivity was as high as 37.10 whereas the dielectric loss was only 0.019 at 1 kHz when the NBCTO volume fraction reached 50 vol%. Theoretical analysis indicated that the dielectric permittivity calculated by the EMT model was close to the experimental data. The results showed that NBCTO/epoxy composite might have potential applications in the electronic devices.

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“…On the other hand, polymers are flexible and easy to process but have very low dielectric permittivity ( ε < 5) . Therefore, high permittivity polymer matrix composites (high‐k PMCs) are widely studied due to the combined advantages of the ceramics and polymers .…”

Section: Introductionmentioning

confidence: 99%

High permittivity nanocomposites fabricated from electrospun polyimide/BaTiO₃ hybrid nanofibers

Ding

Jiang

et al. 2014

Polymer Composites

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High dielectric permittivity, good mechanical properties, and excellent thermal stability are highly desired for the dielectric materials used in the embedded capacitors and energy-storage devices. This study reports polyimide (PI)/barium titanate (BaTiO 3 ) nanocomposites fabricated from electrospun PI/BaTiO 3 hybrid nanofibers. The PI/BaTiO 3 nanocomposites were investigated using Fourier transform infrared spectroscopy, scanning electron microscope, transmission electron microscope, thermal gravimetric analysis, an electromechanical testing machine, a LCR meter and an electric breakdown strength tester. The results showed that BaTiO 3 fillers were uniformly dispersed up to 50 vol% in PI matrix. The dielectric permittivity of the composite (50 vol% BaTiO 3 ) was 29.66 with a dielectric loss of 0.009 at 1 kHz and room temperature. The dielectric permittivity showed a very small dependence on temperature (up to 150 C) and frequency (100 Hz-100 kHz). The nanocomposites also showed high thermal stability and good mechanical properties. The PI/BaTiO 3 nanocomposites will be a promising candidate for uses in embedded capacitors, especially in high temperature circumstance. POLYM. COMPOS., 37:794-801,

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BaTiO3–polyethersulfone nanocomposites with high dielectric constant and excellent thermal stability

Cited by 47 publications

References 19 publications

Thermomechanically stable dielectric composites based on poly(ether ketone) and BaTiO₃ with improved electromagnetic shielding properties in X‐band

Thermomechanically stable dielectric composites based on poly(ether ketone) and BaTiO₃ with improved electromagnetic shielding properties in X‐band

Improved dielectric permittivity of NBCTO/epoxy composite films with low dielectric loss

High permittivity nanocomposites fabricated from electrospun polyimide/BaTiO₃ hybrid nanofibers

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BaTiO3–polyethersulfone nanocomposites with high dielectric constant and excellent thermal stability

Cited by 47 publications

References 19 publications

Thermomechanically stable dielectric composites based on poly(ether ketone) and BaTiO3 with improved electromagnetic shielding properties in X‐band

Thermomechanically stable dielectric composites based on poly(ether ketone) and BaTiO3 with improved electromagnetic shielding properties in X‐band

Improved dielectric permittivity of NBCTO/epoxy composite films with low dielectric loss

High permittivity nanocomposites fabricated from electrospun polyimide/BaTiO3 hybrid nanofibers

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About

Thermomechanically stable dielectric composites based on poly(ether ketone) and BaTiO₃ with improved electromagnetic shielding properties in X‐band

Thermomechanically stable dielectric composites based on poly(ether ketone) and BaTiO₃ with improved electromagnetic shielding properties in X‐band

High permittivity nanocomposites fabricated from electrospun polyimide/BaTiO₃ hybrid nanofibers