Preparation and dielectric properties of CaCu3Ti4O12–polyethersulfone composites

Wang, Fajun; Zhou, Dongxiang; Hu, Yunxiang

doi:10.1002/pssa.200925159

Cited by 24 publications

(16 citation statements)

References 24 publications

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“…This dielectric constant is much higher than that of other ceramic-polymer composites. Subsequently, a great deal of research has occurred regarding the development of polymer-based composites using CCTO as filler [16][17][18][19][20][21][22][23][24]. From an application point of view, thin film of a dielectric composite is highly desirable.…”

Section: Introductionmentioning

confidence: 99%

Dielectric characteristics of CaCu3Ti4O12/P(VDF-TrFE) nanocomposites

Zhang

Shan

et al. 2012

Appl. Phys. A

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Composite thin film is highly desirable for the dielectric applications. In order to develop composite thin film, a nanocomposite, in which nanosized CaCu 3 Ti 4 O 12 (CCTO) particles are used as filler and P(VDF-TrFE) 55/45 mol% copolymer is used as polymer matrix, is investigated. The contents of CCTO in the nanocomposites range from 0% to 50 vol%. The dielectric property of these nanocomposites was characterized at frequencies ranging from 100 Hz to 1 MHz and at temperatures ranging from 200 K to 370 K. A dielectric constant of 62 with a loss of 0.05 was obtained in nanocomposite with 50 vol% CCTO at room temperature at 1 kHz. At the phase transition temperature (∼340 K) of the copolymer, a dielectric constant of 150 with a loss less than 0.1 was obtained in this nanocomposite. It is found that the dielectric loss of the nanocomposites is dominated by the polymer which has a relaxation process. Comparing to composites made using microsized CCTO, the nanocomposites exhibit a much lower dielectric loss and a lower dielectric constant. This indicates that the nanosized CCTO particles have a lower dielectric constant than the microsized CCTO particles.

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Section: Introductionmentioning

confidence: 99%

Dielectric characteristics of CaCu3Ti4O12/P(VDF-TrFE) nanocomposites

Zhang

Shan

et al. 2012

Appl. Phys. A

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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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“…Studies of solid-state CCTO dispersed in other kinds of polymers [22][23][24][25] also give e eff values in the 30-80 range. The loss tangent values (tan d) generally ranged from 0.05 to 0.20 at 100 Hz; the values increased significantly with field frequency for PVDF and P(VDFTrFE), but decreased for epoxy [22], polyethersulfone [24], and polyimide [25].…”

Section: Introductionmentioning

confidence: 96%

“…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]. One of the first studies [19] reports e eff values reaching 610 (at 100 Hz, 25°C) for hotpressed multilayers of 50 vol% solid-state CCTO dispersed in P(VDF-TrFE) copolymer.…”

Section: Introductionmentioning

confidence: 99%

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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Preparation and dielectric properties of CaCu₃Ti₄O₁₂–polyethersulfone composites

Cited by 24 publications

References 24 publications

Dielectric characteristics of CaCu3Ti4O12/P(VDF-TrFE) nanocomposites

Dielectric characteristics of CaCu3Ti4O12/P(VDF-TrFE) nanocomposites

Physical aspects of 0-3 dielectric composites

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

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