Effect of coupling agents on the dielectric properties of CaCu3Ti4O12/PVDF composites

Yang, Cheng; Song, Hongsong; Liu, Dabo

doi:10.1016/j.compositesb.2013.02.006

Cited by 107 publications

(79 citation statements)

References 24 publications

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“…Several routes have been developed for sol-gel synthesis of CCTO [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47], leading to recent studies of polymer composites based on sol-gel CCTO [26][27][28][29][30]. Thomas et al [26] and Yang et al [27] both used an oxalate precursor route to sol-gel CCTO and prepared PVDF composites.…”

Section: Introductionmentioning

confidence: 97%

“…Yang et al [27] report e eff values up to 2.49 9 10 6 with tan d = 48 (40 vol% CCTO, 100 Hz, room temperature). The composites of Yang et al [28] are clearly not dielectric materials, but are more like semiconductors. Another group prepared sol-gel CCTO via a citrate precursor method and then PVDF composites, reporting e eff and tan d values comparable to those of Thomas et al [26].…”

Section: Introductionmentioning

confidence: 98%

“…Many recent studies [19][20][21][22][23][24][25][26][27][28][29][30] have explored CCTO-based polymer composites, hoping to take advantage of the facile processing methods and better mechanical properties afforded by polymer as well as CCTO's high e r values. Most published work employed CCTO prepared via solid-state synthesis methods [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dielectric properties and energy storage performance of CCTO/polycarbonate composites: influence of CCTO synthesis route

Islam

Chance

Loye

et al. 2014

J Sol-Gel Sci Technol

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This work explores the effect of CaCu 3 Ti 4 O 12 (CCTO) synthetic route on CCTO/polycarbonate (PC) composite microstructure, low-field dielectric properties (e eff and tan d), and high-field polarization behavior. CCTO was synthesized via the traditional solid-state route and a wet chemical sol-gel route. PXRD, FE-SEM and BET analysis results show that sol-gel CCTO particles are 20 times smaller and have 20 times more surface area per gram than solid-state CCTO particles. Solution-blended 20 vol% sol-gel CCTO/PC composites have up to 12 times higher e eff values than PC. Surprisingly, the permittivity enhancement due to the smaller sol-gel CCTO particles is not much more than that found using the larger solid-state CCTO particles. Sol-gel CCTO/PC composites show higher dielectric loss and specific conductivity than solidstate CCTO/PC composites, probably due to the presence of polyethylene glycol added as a dispersant in sol-gel CCTO synthesis. The CCTO introduces ferroelectric behavior to the composites, including significant remanent polarization, hysteresis, and energy dissipation. The stored and recovered energy densities in CCTO/PC are up to five times higher than PC at the same applied electric field, but the percentage energy loss reaches 70 %. CCTO/PC composites also have greatly reduced breakdown field strength compared to PC, so the composites' maximum stored energy density is much less than that of PC. Thus CCTO/ PC composites are promising for applications requiring high e eff values at low field strengths, but not as dielectrics for high density, pulse power energy storage.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dielectric properties and energy storage performance of CCTO/polycarbonate composites: influence of CCTO synthesis route

Islam

Chance

Loye

et al. 2014

J Sol-Gel Sci Technol

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“…[27][28][29] Composites using CCTO have been widely studied. [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] It should be mentioned that, in most of DDCs using nanosized ceramic fillers, the dielectric constant can only reach the value around 50 even for the composites with a volume fraction of filler up to 50 vol.%. 7 It is well known that the high filler content reduces the composite flexibility and results in weak mechanical properties, which can limit its applications.…”

Section: Dielectric-dielectric Compositesmentioning

confidence: 99%

Physical aspects of 0-3 dielectric composites

2015

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0-3 dielectric composites with high dielectric constants have received great interest for various technological applications. Great achievements have been made in the development of high performance of 0-3 composites, which can be classified into dielectricdielectric (DDCs) and conductor-dielectric composites (CDCs). However, predicting the dielectric properties of a composite is still a challenging problem of both theoretical and practical importance. Here, the physical aspects of 0-3 dielectric composites are reviewed. The limitation of current understanding and new developments in the physics of dielectric properties for dielectric composites are discussed. It is indicated that the current models cannot explain well the physical aspects for the dielectric properties of 0-3 dielectric composites. For the CDCs, experimental results show that there is a need to find new equations/models to predict the percolative behavior incorporating more parameters to describe the behavior of these materials. For the DDCs, it is indicated that the dielectric loss of each constituent has to be considered, and that it plays a critical role in the determination of the dielectric response of these types of composites. The differences in the loss of the constituents can result in a higher dielectric constant than both of the constituents combined, which breaks the Wiener limits.

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“…Kobayashi et al 13) obtained BaTiO 3 polymer composite films by polyvinylidene fluoride (PVDF) and siloxane-modified polyamideimide (SPAI) as host polymers respectively. It was discovered that the dielectric constant reached 31.8 for the 30 vol %-BaTiO 3 -PVDF film with the BaTiO 3 crystal size of 27.3 nm, that was four times larger than the dielectric constant of the PVDF film without BaTiO 3 14) obtained CCTO@Si69/PVDF composites through treating the surface of CCTO by the silane coupling agent bis[3-(triethoxy silyl) propyl] tetrasulfide (Si69), and discussed the interface effect on the dielectric properties of CCTO/PVDF composites. Lin et al 15) investigated the surface functionalization of BaTiO 3 nanoparticles by dopamine, so as to improve its compatibility with the polyvinylidene fluoride polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

[Retracted Article] Performance of Ba0.95Ca0.05Zr0.15Ti0.85O3/PVDF composite flexible films

Wang

Peng

2014

J. Ceram. Soc. Japan

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Calcium barium zirconate titanate (Ba 0.95 Ca 0.05 Zr 0.15 Ti 0.85 O 3 , BCZT) ceramic particles were obtained by conventional ceramic processing method. BCZT powders were modified by dopamine through chemical coating method. The composite films based on dopamine@BCZT and polyvinylidene fluoride were fabricated by solution casting method. The microstructure and morphology were characterized by X-ray diffraction, high-resolution transmission electron microscopy, and field emission scanning electron microscope. The impedance analyzer and dielectric withstand voltage test were used to test the dielectric constant, loss tangent, and breakdown strength. TEM results displayed that dopamine was coated on the surface of BCZT particles uniformly with an average thickness of 20 nm. SEM results revealed that the ceramic particles were dispersed homogeneously in the matrix. The dielectric constant increased with the increasing of BCZT contents, while the loss tangent remained constant in the frequency range of 10 3 to 10 5 Hz.

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Effect of coupling agents on the dielectric properties of CaCu3Ti4O12/PVDF composites

Cited by 107 publications

References 24 publications

Dielectric properties and energy storage performance of CCTO/polycarbonate composites: influence of CCTO synthesis route

Dielectric properties and energy storage performance of CCTO/polycarbonate composites: influence of CCTO synthesis route

Physical aspects of 0-3 dielectric composites

[Retracted Article] Performance of Ba<sub>0.95</sub>Ca<sub>0.05</sub>Zr<sub>0.15</sub>Ti<sub>0.85</sub>O<sub>3</sub>/PVDF composite flexible films

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