Physical aspects of 0-3 dielectric composites

Zhang, Lin; Bass, Patrick; Cheng, Z.-Y.

doi:10.1142/s2010135x15500125

Cited by 30 publications

(16 citation statements)

References 81 publications

(95 reference statements)

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“…The mechanical flexibility of composites is difficult to maintain when the filler loading is high. To realize high dielectric constants, researchers attempted to assemble fillers of lower loading in a preferred orientation to enable the electric field to penetrate easily . Computer modeling demonstrated the favorable relationship between the dielectric constant and the filler orientation, as shown in Figure a .…”

Section: Nanodielectric Materials Explorationmentioning

confidence: 99%

Review of Polymer‐Based Nanodielectric Exploration and Film Scale‐Up for Advanced Capacitors

Tan

2019

Adv Funct Materials

316

166

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The uprising demands for electrical power and electrification requires advanced dielectric functionalities including high capacitance density, high energy density, high current handling capability, high voltage, high temperature, high thermal conductivity, light weight, and environmental reliability. Nanodielectric engineering emerges and attracts extensive efforts from many countries as a result. Unlike prior reviews focusing on lab scale nanocomposite study, this review focuses on recent innovations in polymerbased nanodielectric design on a large scale and their film scale-up efforts for advanced capacitors. The unconventional polymer-nanofiller engineering and their process in the last two decades are discussed. The nanofunctionalized polymers on a molecular level for high dielectric constants and high dielectric strength are briefly described. The challenge associated with film scale-up and retention of nanodielectric properties are then pointed out to be crucial toward a transfer of dielectric and capacitor technology. Several important attempts at scaling up dielectric films and capacitors recently supported by the US government and industry are reviewed. An alternative strategic approach to achieving high performance polymer films is introduced by leveraging 2D surface coating on commercially mature large-scale polymer films. Future pathways for high quality scalable dielectric films exhibiting desirable dielectric properties and feasibility for capacitor manufacturing are suggested.to develop a more compact pulse-forming network for a pulsed high power microwave (HPM), a laser source, aircraft ignition systems, and high-power electrical systems. [1] The US NAVY strove to develop an all-electric warship for advancing its future combat capability (lethality and survivability). This warship required high-power weapons such as electromagnetic railguns for obtaining pin-point accuracy at a very long range electromagnetic launch systems for rapid aircraft and missile deployment and higher-power radar and sonar systems for "seeing" farther through both air and water. The US Army funded the development of the high-energy-density biaxially oriented polypropylene (BOPP) capacitor and the high-temperature polyetherimide dielectric for ground vehicles to realize better serviceability, higher power, and lower mass of the equipment that ground troops carry. [2,3] Although the energy density has been improved up to 3 J cm −3 via metallization control, the performance, and lifetime of BOPP capacitors degrade rapidly with increasing temperature (the ripple current handing capability decreases as the temperature increases from 85 to 105 °C).Improvements in the fault resistance and the reliability of dielectric materials will enable capacitors to withstand higher electrical current and heat without being excessively derated under extreme stress conditions. A large gap remains between the technology availability and the desired properties, such as combined high temperature and energy density and a low dissipation factor. Fa...

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Section: Nanodielectric Materials Explorationmentioning

confidence: 99%

Review of Polymer‐Based Nanodielectric Exploration and Film Scale‐Up for Advanced Capacitors

Tan

2019

Adv Funct Materials

316

166

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“…[6] To obtain better dielectric results, many researchers have doped barium titanate with different elements such as lanthanum, yttrium, nickel, iron, and manganese. [21] To enhance the dielectric properties, ceramic materials can be introduced into the polymers. It is well known that Mn 2+ ion acts as a B-site acceptor in barium titanate lattice.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, organic materials such as polymers are flexible and are easily processable at low temperature but having low dielectric constant value. [21] To enhance the dielectric properties, ceramic materials can be introduced into the polymers. However, to obtain very high dielectric constant of polymer-ceramic composite, a large volume fraction of ceramic materials are required, but it may cause bad mechanical strength of the resultant composite.…”

Section: Introductionmentioning

confidence: 99%

A study of dielectric behavior of manganese doped barium titanate–polyimide composites

Kumari

Ghosh

2017

Adv Polym Technol

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In this work, a series of BaTi 1−x Mn x O 3 -polyimide films were prepared by simple solution casting method. For the preparation of composite films firstly, manganese doped barium titanate, BaTi 1−x Mn x O 3 (where x = 0.00, 0.01, 0.03, 0.05) was synthesized by sol-gel process. The effect of Mn doping on its structural and dielectric properties was nicely explained. The highest dielectric constant value of 7,104 was obtained for BaTi 0.99 Mn 0.01 O 3 (BTMn) nanoparticles with low dielectric loss value 2.44. It was observed that Mn-doping concentration on barium titanate influences its crystal structure. Improved dielectric properties were reported for nanocomposite thin films containing BaTi 0.99 Mn 0.01 O 3 and polyimide (PI). A series of five homogeneous nanocomposite films were successfully prepared and were characterized thoroughly. The dielectric properties were studied as a function of frequency and loading percentage of BTMn in PI. The dielectric constant of the BTMn/PI nanocomposite films increased from 3.23 to 8.63 with the increase in loading percentage of ceramic from 0 to 5 wt%, respectively. The nanocomposite films were flexible with good mechanical properties and the flexibility decreased with increase in loading percentage of BTMn. The films showed high thermal stability in nitrogen atmosphere up to 571°C with 10% weight loss and also exhibited high glass transition temperature up to 337°C. K E Y W O R D S dielectric properties, inorganic materials, mechanical properties, polyimides, thermal properties How to cite this article: Kumari A, Dasgupta Ghosh B. A study of dielectric behavior of manganese doped barium titanate-polyimide composites. Adv Polym

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“…The interfacial polarization is kind of Maxwell‐Wagner polarization/effect. To further understand interfacial polarization, a parallel plate model consisting of two different materials (Figure ) can be used . For a single layer of dielectrics having a simple Debye response under a step voltage at t = 0, the current (

j_{D} (t)

) through the dielectric can be written as:…”

Section: Resultsmentioning

confidence: 99%

Low‐frequency dielectric dispersion in polymer‐derived amorphous silicon carbonitride ceramics

Cao

Zhu

et al. 2018

J Am Ceram Soc

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The dielectric response of polymer‐derived amorphous silicon carbonitride (PDC‐SiCN) material was studied over a wide frequency range from 1 mHz to 10 MHz. Aside from presenting a relaxation process over 105 to 0.03 Hz frequency range, the material showed a strong low‐frequency dielectric dispersion (LFDD), which resulted in extremely high permittivities (up to 105) at frequencies lower than 0.03 Hz. It is identified that this LFDD resulted from relaxation process was not induced by conductivity. Therefore, PDC‐SiCN material showed two relaxation processes. Based on its microstructure, two polarization mechanisms were proposed for PDC‐SiCN: a mechanism based on polarons generated by unpaired electrons present in the material and an interfacial polarization mechanism as a result of different properties of SiCxN4−x matrix and free‐carbon clusters. Interfacial polarization process was simulated based on a parallel plate model involving two different materials. The result indicated that the relaxation time of an interfacial polarization can be distributed over a broad time range in the material.

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Physical aspects of 0-3 dielectric composites

Cited by 30 publications

References 81 publications

Review of Polymer‐Based Nanodielectric Exploration and Film Scale‐Up for Advanced Capacitors

Review of Polymer‐Based Nanodielectric Exploration and Film Scale‐Up for Advanced Capacitors

A study of dielectric behavior of manganese doped barium titanate–polyimide composites

Low‐frequency dielectric dispersion in polymer‐derived amorphous silicon carbonitride ceramics

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