Synthesis of calcium copper titanate (CaCu3Ti4O12) nanowires with insulating SiO2 barrier for low loss high dielectric constant nanocomposites

Tang, Haixiong; Zhou, Zhi; Bowland, Christopher C.; Sodano, Henry A.

doi:10.1016/j.nanoen.2015.09.002

Cited by 132 publications

(62 citation statements)

References 36 publications

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“…To develop applications for CCTO, scholars aim to minimize the high dielectric loss [17][18][19]. Simultaneously, attempts have been made to explore the possibility of obtaining high dielectric permittivity composites for potential electronic components by embedding CCTO particles into polymer [20][21][22][23].…”

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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“…Additionally, the addition of CNTs changes the frequency dependence of the dielectric constant of the blends, showing significant frequency dependence; namely the dielectric constant decreases with increasing frequency. Such a trend means that the dipole mobility is not sufficiently mobile to be displaced as the frequency of the exposed electric field exceeds the relaxation frequency . The dielectric loss (Fig.…”

Section: Resultsmentioning

confidence: 99%

Constructing the core–shell structured island domain in polymer blends to achieve high dielectric constant and low loss

Yang

Zhang

et al. 2019

Polymer International

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Carbon nanotubes (CNTs) and barium titanate (BaTiO3) (BT) were simultaneously introduced into the immiscible blend poly(ethylene‐co‐vinyl acetate)/thermoplastic urethane (EVA/TPU), and the EVA/TPU/CNT/BT quaternary polymer composite blends with core–shell structured island TPU domain were successfully prepared, in which CNTs in the TPU domain act as the core and the BT spheres at the interface of the TPU and EVA act as the shell. A core–shell structured island can lead to the formation of micro‐capacitors and further accumulate electron storage owing to the incorporation of CNTs and BT; on the other hand, a BT shell can be assembled along the TPU spheres, reducing the possibility of formation of a conductive CNT network, resulting in suppressed dielectric loss. Therefore, CNTs and BT were tailor‐made into blend composites with a core–shell structured domain, which can achieve an increased dielectric constant by 176% and decreased low dielectric loss by 80% compared with the blend composites with only CNTs in the TPU domain. © 2019 Society of Chemical Industry

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“…Results of dielectric constants indicated gradual decrease when measured at higher frequencies. This can be attributed to dipole mobility reduction where the dipoles are not sufficiently mobile to displace at the same pace as the frequency of the applied electric field exceeds the relaxation frequency . Dielectric loss generally results at a high value when a relatively low frequency is applied (interfacial polarization) and at a low value when the frequency increases.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of bulk piezoelectric and dielectric BaTiO₃ ceramics using paste extrusion 3D printing technique

et al. 2018

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A simple and facile method was developed to fabricate functional bulk barium titanate (BaTiO3, BT) ceramics using the paste extrusion 3D printing technique. The BT ceramic is a lead‐free ferroelectric material widely used for various applications in sensors, energy storage, and harvesting. There are several traditional methods (eg, tape casting) to process bulk BT ceramics but they have disadvantages such as difficult handing without shape deformation, demolding, complex geometric shapes, expansive molds, etc. In this research, we utilized the paste extrusion 3D printing technique to overcome the traditional issues and developed printable ceramic suspensions containing BT ceramic powder, polyvinylidene fluoride (PVDF), N,N‐dimethylformamide (DMF) through simple mixing method and chemical formulation. This PVDF solution erformed multiple roles of binder, plasticizer, and dispersant for excellent manufacturability while providing high volume percent and density of the final bulk ceramic. Based on empirical data, it was found that the maximum binder ratio with good viscosity and retention for desired geometry is 1:8.8, while the maximum BT content is 35.45 vol% (77.01 wt%) in order to achieve maximum density of 3.93 g/cm3 (65.3%) for 3D printed BT ceramic. Among different sintering temperatures, it was observed that the sintered BT ceramic at 1400°C had highest grain growth and tetragonality which affected high performing piezoelectric and dielectric properties, 200 pC/N and 4730 at 103 Hz respectively. This paste extrusion 3D printing technique and simple synthesis method for ceramic suspensions are expected to enable rapid massive production, customization, design flexibility of the bulk piezoelectric and dielectric devices for next generation technology.

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Synthesis of calcium copper titanate (CaCu3Ti4O12) nanowires with insulating SiO2 barrier for low loss high dielectric constant nanocomposites

Cited by 132 publications

References 36 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

Constructing the core–shell structured island domain in polymer blends to achieve high dielectric constant and low loss

Fabrication of bulk piezoelectric and dielectric BaTiO₃ ceramics using paste extrusion 3D printing technique

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Synthesis of calcium copper titanate (CaCu3Ti4O12) nanowires with insulating SiO2 barrier for low loss high dielectric constant nanocomposites

Cited by 132 publications

References 36 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

Constructing the core–shell structured island domain in polymer blends to achieve high dielectric constant and low loss

Fabrication of bulk piezoelectric and dielectric BaTiO3 ceramics using paste extrusion 3D printing technique

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Fabrication of bulk piezoelectric and dielectric BaTiO₃ ceramics using paste extrusion 3D printing technique