Limits...
Manufacture of electrical and magnetic graded and anisotropic materials for novel manipulations of microwaves.

Grant PS, Castles F, Lei Q, Wang Y, Janurudin JM, Isakov D, Speller S, Dancer C, Grovenor CR - Philos Trans A Math Phys Eng Sci (2015)

Bottom Line: While aspects of ST theory have been confirmed using these structures, they are often disadvantaged by narrowband operation, high losses and difficulties in implementation.A key aim is to highlight the limitations and possibilities of various manufacturing approaches, to constrain designs to those that may be achievable.The article focuses on polymer-based nano- and microcomposites in which interactions with microwaves are achieved by loading the polymers with high-permittivity and high-permeability particles, and manufacturing approaches based on spray deposition, extrusion, casting and additive manufacture.

View Article: PubMed Central - PubMed

Affiliation: Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK patrick.grant@materials.ox.ac.uk.

ABSTRACT
Spatial transformations (ST) provide a design framework to generate a required spatial distribution of electrical and magnetic properties of materials to effect manipulations of electromagnetic waves. To obtain the electromagnetic properties required by these designs, the most common materials approach has involved periodic arrays of metal-containing subwavelength elements. While aspects of ST theory have been confirmed using these structures, they are often disadvantaged by narrowband operation, high losses and difficulties in implementation. An all-dielectric approach involves weaker interactions with applied fields, but may offer more flexibility for practical implementation. This paper investigates manufacturing approaches to produce composite materials that may be conveniently arranged spatially, according to ST-based designs. A key aim is to highlight the limitations and possibilities of various manufacturing approaches, to constrain designs to those that may be achievable. The article focuses on polymer-based nano- and microcomposites in which interactions with microwaves are achieved by loading the polymers with high-permittivity and high-permeability particles, and manufacturing approaches based on spray deposition, extrusion, casting and additive manufacture.

No MeSH data available.


Related in: MedlinePlus

Lattice structure produced by FDM additive manufacture using ABS polymer with 10 vol% NiZn ferrite filament.
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RSTA20140353F10: Lattice structure produced by FDM additive manufacture using ABS polymer with 10 vol% NiZn ferrite filament.

Mentions: Figure 10 shows the same diamond-like lattice structure as in figure 9b but now realized by additive manufacture in an ABS+10 vol% NiZn ferrite composite, which provided a real permeability of approximately 2 up to 100 MHz for 25 vol% ferrite, and of approximately 1.3 up to 1 GHz for 10 vol% ferrite when printed in bulk.Figure 10.


Manufacture of electrical and magnetic graded and anisotropic materials for novel manipulations of microwaves.

Grant PS, Castles F, Lei Q, Wang Y, Janurudin JM, Isakov D, Speller S, Dancer C, Grovenor CR - Philos Trans A Math Phys Eng Sci (2015)

Lattice structure produced by FDM additive manufacture using ABS polymer with 10 vol% NiZn ferrite filament.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4528831&req=5

RSTA20140353F10: Lattice structure produced by FDM additive manufacture using ABS polymer with 10 vol% NiZn ferrite filament.
Mentions: Figure 10 shows the same diamond-like lattice structure as in figure 9b but now realized by additive manufacture in an ABS+10 vol% NiZn ferrite composite, which provided a real permeability of approximately 2 up to 100 MHz for 25 vol% ferrite, and of approximately 1.3 up to 1 GHz for 10 vol% ferrite when printed in bulk.Figure 10.

Bottom Line: While aspects of ST theory have been confirmed using these structures, they are often disadvantaged by narrowband operation, high losses and difficulties in implementation.A key aim is to highlight the limitations and possibilities of various manufacturing approaches, to constrain designs to those that may be achievable.The article focuses on polymer-based nano- and microcomposites in which interactions with microwaves are achieved by loading the polymers with high-permittivity and high-permeability particles, and manufacturing approaches based on spray deposition, extrusion, casting and additive manufacture.

View Article: PubMed Central - PubMed

Affiliation: Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK patrick.grant@materials.ox.ac.uk.

ABSTRACT
Spatial transformations (ST) provide a design framework to generate a required spatial distribution of electrical and magnetic properties of materials to effect manipulations of electromagnetic waves. To obtain the electromagnetic properties required by these designs, the most common materials approach has involved periodic arrays of metal-containing subwavelength elements. While aspects of ST theory have been confirmed using these structures, they are often disadvantaged by narrowband operation, high losses and difficulties in implementation. An all-dielectric approach involves weaker interactions with applied fields, but may offer more flexibility for practical implementation. This paper investigates manufacturing approaches to produce composite materials that may be conveniently arranged spatially, according to ST-based designs. A key aim is to highlight the limitations and possibilities of various manufacturing approaches, to constrain designs to those that may be achievable. The article focuses on polymer-based nano- and microcomposites in which interactions with microwaves are achieved by loading the polymers with high-permittivity and high-permeability particles, and manufacturing approaches based on spray deposition, extrusion, casting and additive manufacture.

No MeSH data available.


Related in: MedlinePlus