Enhanced dielectric performance of amorphous calcium copper titanate/polyimide hybrid film

Chi, Qingguo; Sun, J.; Zhang, Changhai; Liu, Gang; Lin, Jiaqi; Wang, Yuning; Wang, Xuan; Liu, Qingquan

doi:10.1039/c3tc31757a

Cited by 127 publications

(71 citation statements)

References 27 publications

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“…Dang [24] utilized in situ polymerization to disperse CCTO powders into a polyimide matrix and obtained a composite film with a dielectric permittivity of 49 when the volume fraction was 40 vol % at 100 Hz. Chi [25] reported that a relatively high dielectric permittivity, low loss, and low conductivity were simultaneously achieved in nano-sized CCTO/PI films. Compared with the micro-sized CCTO/PI film with a 10 vol % concentration of micro-sized CCTO, the dielectric permittivity of the nano-sized CCTO/PI film with a 3 vol % concentration of nano-sized CCTO increased by 16%.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Dielectric Properties of PTFE-Based Composites Filled by Micron/Submicron-Blended CCTO

Xie

Liang

et al. 2017

Crystals

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This paper investigated a polymer-based composite by homogeneously embedding calcium copper titanate (CaCu 3 Ti 4 O 12 ; CCTO) fillers into a polytetrafluoroethylene matrix. We observed the composite filled by CCTO powder at different sizes. The particle size effects of the CCTO filling, including single-size particle filling and co-blending filling, on the microstructure and dielectric properties of the composite were discussed. The dielectric performance of the composite was investigated within the frequency range of 100 Hz to 1 MHz. Results showed that the composite filled by micron/submicron-blended CCTO particles had the highest dielectric constant (ε r = 25.6 at 100 Hz) and almost the same dielectric loss (tanδ = 0.1 at 100 Hz) as the composite filled by submicron CCTO particles at the same volume percentage content. We researched the theoretical reason of the high permittivity and low dielectric loss. We proved that it was effective in improving the dielectric property of the polymer-based composite by co-blending filling in this experiment.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Dielectric Properties of PTFE-Based Composites Filled by Micron/Submicron-Blended CCTO

Xie

Liang

et al. 2017

Crystals

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“…CCTO/PI composite film with a dielectric permittivity as high as 49 at 100 Hz was reported by Dang et al [13]. It was worth mentioning that Chi et al have reported the amorphous nano-CaCu 3 Ti 4 O 12 (a-CCTO)/PI with a 3 vol% concentration of a-CCTO for the first time, and indicated that a relatively high dielectric permittivity, low loss and low conductivity were simultaneously achieved in the a-CCTO/PI films [14]. Yang et al [15] used nanosized CCTO fillers to prepare CCTO/PVDF composites and found a very high permittivity (over 10 6 ) at the nanoscale at 100 Hz when the concentration of the CCTO fillers was 40 vol%, however, the dielectric loss of the composite films is very giant (about 50 at 100 Hz) due to the size effect of nano ceramic and interface polarization effect.…”

Section: Introductionmentioning

confidence: 81%

Investigation on dielectric properties of the polyimide- based composite films with high permittivity

Wang

Chi

Liu

et al. 2014

IEEE Trans. Dielect. Electr. Insul.

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CaCu 3 Ti 4 O 12 (CCTO) and Zr-doped CaCu 3 Ti 3.95 Zr 0.05 O 12 (CCTZO) particles with a giant dielectric permittivity were used as filler to prepare Polyimide (PI)-based composites, respectively. Dielectric properties of CCTO/PI and CCTZO/PI composite films have been investigated comparatively. It is found that the dielectric properties of two kinds of composite films with low concentration filler loading have independence on frequency and temperature, while the dielectric permittivity of two kinds of composite films increases remarkably with increasing concentration of filler loading(>20%) and temperature. The dielectric permittivity of CCTZO/PI composite film with a 40% filler loading reaches up to 70 at 10 Hz, which is higher than that (43) of CCTO/PI composite film with the same concentration filler loading. It is also found that the dielectric permittivity of CCTZO/PI composite film can reach about 260 at 150 ℃ when the concentration of CCTZO loading is 40 vol%. The conductive properties of two kinds of composite films increase with increasing frequency, temperature and concentration of filler loading. The study indicates that dielectric and conductive properties are closely related to the polarization between filler and PI matrix and semiconductive network supported by the percolation theory.

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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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Enhanced dielectric performance of amorphous calcium copper titanate/polyimide hybrid film

Cited by 127 publications

References 27 publications

Microstructure and Dielectric Properties of PTFE-Based Composites Filled by Micron/Submicron-Blended CCTO

Microstructure and Dielectric Properties of PTFE-Based Composites Filled by Micron/Submicron-Blended CCTO

Investigation on dielectric properties of the polyimide- based composite films with high permittivity

Physical aspects of 0-3 dielectric composites

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