3D printed anisotropic dielectric composite with meta-material features

Isakov, Dmitry; Qin, Lei; Castles, Flynn; Stevens, Christopher J.; Grovenor, C.R.M.; Grant, Patrick S.

doi:10.1016/j.matdes.2015.12.176

Cited by 141 publications

(92 citation statements)

References 51 publications

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“…This is confirmed by simulation and experiment shown in Fig. 3, which considers the gap sitting on the interface between two materials (blue and green) with distinctly different relative dielectric permittivities ε 1 = 2.6 and ε 2 = 7.2 respectively (typical values of permittivity for 3D-printed dielectrics 6 ) with the electric field between the faces of the gap initially perpendicular to interface between the two materials. Figure 3a shows the simulated change for SRR 4 in the transmission signal S 21 as the ring is then rotated through 90°.…”

Section: Resultssupporting

confidence: 69%

“…Recent progress in manufacturing techniques, including additive manufacturing and 3D printing, allows the fabrication of composite dielectric materials for novel electromagnetic applications with spatially-varying dielectric and/or magnetic properties 4–6 . These intentionally heterogeneous composite materials allow for unusual manipulation of microwaves such as flat lenses, highly directional antennas, cloaks, etc.…”

Section: Introductionmentioning

confidence: 99%

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A Split Ring Resonator Dielectric Probe for Near-Field Dielectric Imaging

Isakov

Stevens

Castles

et al. 2017

Sci Rep

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A single split-ring resonator (SRR) probe for 2D surface mapping and imaging of relative dielectric permittivity for the characterisation of composite materials has been developed. The imaging principle, the analysis and the sensitivity of the SRR surface dielectric probe data is described. The surface dielectric properties of composite materials in the frequency range 1–3 GHz have been measured based on the magnetic resonance frequency of the transmission loss of the SRR dielectric probe when in contact with the surface. The SRR probe performance was analysed analytically and using full-wave simulation, and predictions showed close agreement with experiment for composite materials with spatially varying dielectric permittivity manufactured by 3D printing. The spatial and permittivity resolution of the SRR dielectric probe were controlled by the geometrical parameters of the SRR which provided flexibility to tune the SRR probe. The best accuracy of the dielectric permittivity measurements was within 5%.

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Section: Resultssupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

A Split Ring Resonator Dielectric Probe for Near-Field Dielectric Imaging

Isakov

Stevens

Castles

et al. 2017

Sci Rep

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“…The permittivity increased from 2.57 to 8.72 by incorporating 70 wt% of BaTio 3 . ABS with 30 vol% of bariumstrontium-titanate (Ba 0.6 4Sr 0.36 TiO 3 ) increased permittivity of ABS from 2.65 to 6.7 [21]. The ceramic microfillers increase the permittivity of polymers, but they require high weight/volume percentage of filler.…”

Section: Resultsmentioning

confidence: 99%

Achieving improved dielectric, mechanical, and thermal properties of additive manufactured parts via filament modification using OMMT-based nanocomposite

Francis

Jain

2017

Prog Addit Manuf

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Additive manufacturing (AM) is as an emerging technique which can fabricate any complex shapes and is currently being used to directly manufacture end-use products. However, further progress in AM greatly relies on the advancements in materials that can be processed by this technique. Polymer nanocomposites are known for their superior properties compared to pristine polymer. Organically modified montmorillonite (OMMT) is a versatile nanoparticle which has the potential to significantly alter various polymer properties. The present work discusses about utilizing OMMT-based polymer nanocomposite for AM via fused deposition modeling (FDM). The acrylonitrile butadiene styrene (ABS) filament was modified by coating it with OMMT/ABS nanocomposite solution and further exposed to microwave irradiation before AM process. A fused network of nanocomposite coating with core polymer was developed over the entire part during AM. Dielectric properties of FDM parts were altered because of the presence of OMMT nanoparticles, as their ionic nature provided addition polarization mechanism. A significant improvement in thermal behavior, tensile modulus, and hardness was also observed. The presented approach provides an efficient way to improve the desired properties of FDM parts.

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“…With the progress in dielectric materials research, [68][69][70][71] other types of dielectric materials may be exploited with a high permittivity at microwaves or even higher frequencies. For example, composite materials, aqueous solutions, and organic solvents are the most possible candidates, due to the fact that they are easier to shape and fabricate.…”

Section: Outlook and Conclusionmentioning

confidence: 99%

All-dielectric metamaterial frequency selective surface

Wang

et al. 2017

J. Adv. Dielect.

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Frequency selective surface (FSS) has been extensively studied due to its potential applications in radomes, antenna reflectors, high-impedance surfaces and absorbers. Recently, a new principle of designing FSS has been proposed and mainly studied in two levels. In the level of materials, dielectric materials instead of metallic patterns are capable of achieving more functional performance in FSS design. Moreover, FSSs made of dielectric materials can be used in different extreme environments, depending on their electrical, thermal or mechanical properties. In the level of design principle, the theory of metamaterial can be used to design FSS in a convenient and concise way. In this review paper, we provide a brief summary about the recent progress in all-dielectric metamaterial frequency selective surface (ADM-FSS). The basic principle of designing ADM-FSS is summarized. As significant tools, Mie theory and dielectric resonator (DR) theory are given which illustrate clearly how they are used in the FSS design. Then, several design cases including dielectric particle-based ADM-FSS and dielectric network-based ADM-FSS are introduced and reviewed. After a discussion of these two types of ADM-FSSs, we reviewed the existing fabrication techniques that are used in building the experiment samples. Finally, issues and challenges regarding the rapid fabrication techniques and further development aspects are discussed.

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3D printed anisotropic dielectric composite with meta-material features

Cited by 141 publications

References 51 publications

A Split Ring Resonator Dielectric Probe for Near-Field Dielectric Imaging

A Split Ring Resonator Dielectric Probe for Near-Field Dielectric Imaging

Achieving improved dielectric, mechanical, and thermal properties of additive manufactured parts via filament modification using OMMT-based nanocomposite

All-dielectric metamaterial frequency selective surface

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