A conductor for power transportation comprises an elongated core constructed from a core material and an elongated conductive casing constructed from a conductive material. The elongated conductive casing is positioned around the elongated core and constructed from various layers of wires. Each layer of wires consists of a set of wires which are positioned next to each other, and at least a fraction of these wires being shaped in such a way that for the cross section of the wire. A circumscribed circle is filled only with between 50% and 90% of wire material. The cross section of the wire has a central portion filled with wire and a plurality of protrusions. The shape of these wires is such that the space taken up by these wires in the stack of wires in the layers is substantially cylindrical.

A conductor for power transportation comprises an elongated core constructed from a core material and an elongated conductive casing constructed from a conductive material. The elongated conductive casing is positioned around the elongated core and constructed from various layers of wires. Each layer of wires consists of a set of wires which are positioned next to each other, and at least a fraction of these wires being shaped in such a way that for the cross section of the wire. A circumscribed circle is filled only with between 50% and 90% of wire material. The cross section of the wire has a central portion filled with wire and a plurality of protrusions. The shape of these wires is such that the space taken up by these wires in the stack of wires in the layers is substantially cylindrical.

Aluminum alloy wires with improved electrical conductivity and improved ultimate tensile strength are disclosed. The aluminum alloys include magnesium, silicon, and copper and are formed without a solution heat treatment. The aluminum alloy wires are useful as conductors for overhead transmission lines. Methods of making the aluminum alloy wires are further disclosed.

Provided herein are composite materials and methods of making composite materials including carbon nanoscale fiber networks. The composite materials may include a stretched and doped carbon nanoscale fiber network and a capping layer. The methods of making the composite materials may include stretching a carbon nanoscale fiber network, contacting the nanoscale fiber network with a dopant, and disposing a capping layer on a surface of the carbon nanoscale fiber network.

Provided herein are composite materials and methods of making composite materials including carbon nanoscale fiber networks. The composite materials may include a stretched and doped carbon nanoscale fiber network and a capping layer. The methods of making the composite materials may include stretching a carbon nanoscale fiber network, contacting the nanoscale fiber network with a dopant, and disposing a capping layer on a surface of the carbon nanoscale fiber network.

The present disclosure provides a coated carbon nanotube electric wire that excels in visibility as well as weight reduction, abrasion resistance, and insulation reliability. A coated carbon nanotube electric wire includes a carbon nanotube wire made up of one or more carbon nanotube aggregates formed by a plurality of carbon nanotubes, and an insulating coating layer configured to coat the carbon nanotube wire, in which arithmetic mean roughness (Ra1) of an outer surface of the carbon nanotube wire in a circumferential direction is smaller than arithmetic mean roughness (Ra2) of an outer surface of the insulating coating layer in the circumferential direction.

The present disclosure provides a coated carbon nanotube electric wire that excels in visibility as well as weight reduction, abrasion resistance, and insulation reliability. A coated carbon nanotube electric wire includes a carbon nanotube wire made up of one or more carbon nanotube aggregates formed by a plurality of carbon nanotubes, and an insulating coating layer configured to coat the carbon nanotube wire, in which arithmetic mean roughness (Ra1) of an outer surface of the carbon nanotube wire in a circumferential direction is smaller than arithmetic mean roughness (Ra2) of an outer surface of the insulating coating layer in the circumferential direction.

Provided is a coated electric wire that has excellent electroconductivity comparable to a wire made of copper, aluminum, or the like and that exhibits excellent weight reduction and heat dissipation characteristics. A coated carbon nanotube electric wire includes: a carbon nanotube wire including one or more carbon nanotube aggregates configured of a plurality of carbon nanotubes; and an insulating coating layer coating the carbon nanotube wire, and a proportion of a sectional area of the insulating coating layer in a radial direction with respect to a sectional area of the carbon nanotube wire in the radial direction is equal to or greater than 0.001 and equal to or less than 1.5.

Provided is a coated electric wire that has excellent electroconductivity comparable to a wire made of copper, aluminum, or the like and that exhibits excellent weight reduction and heat dissipation characteristics. A coated carbon nanotube electric wire includes: a carbon nanotube wire including one or more carbon nanotube aggregates configured of a plurality of carbon nanotubes; and an insulating coating layer coating the carbon nanotube wire, and a proportion of a sectional area of the insulating coating layer in a radial direction with respect to a sectional area of the carbon nanotube wire in the radial direction is equal to or greater than 0.001 and equal to or less than 1.5.

The present disclosure relates to a carbon nanotube strand wire obtained by twisting a plurality of CNT wires of a plurality of bundled CNT aggregates configured of a plurality of CNTs together. A number of twists t1 of the CNT wires is equal to or greater than 0 and less than 2500 T/m, and a number of twists t2 of the CNT strand wire is greater than 0 and less than 2500 T/m.