Provided are an insulation coating composition for an oriented electrical steel sheet, an oriented electrical steel sheet having an insulation coating formed on the surface thereof by using the same, and a manufacturing method thereof, and specifically, it is possible to provide an insulation coating composition for an oriented electrical steel sheet, including 0.1 to 7 wt % of hollow nanoparticles, 0.1 to 5 wt % of ceramic nanofibers, 0.1 to 5 wt % of mesoporous nanoparticles, 30 to 60 wt % of colloidal silica nanoparticles, and 30 to 60 wt % of phosphate, and to provide an oriented electrical steel sheet including an insulation coating produced by the composition on the surface of the oriented electrical steel sheet, including 0.005 to 0.05 wt % of any one element selected from boron (B), vanadium (V), or a combination thereof, 2.6 to 4.3 wt % of silicon (Si), 0.020 to 0.040 wt % of aluminum (Al), 0.01 to 0.20 wt % of manganese (Mn), in which the balance is composed of Fe and other inevitable impurities, and a manufacturing method thereof.

Provided are an insulation coating composition for an oriented electrical steel sheet, an oriented electrical steel sheet having an insulation coating formed on the surface thereof by using the same, and a manufacturing method thereof, and specifically, it is possible to provide an insulation coating composition for an oriented electrical steel sheet, including 0.1 to 7 wt % of hollow nanoparticles, 0.1 to 5 wt % of ceramic nanofibers, 0.1 to 5 wt % of mesoporous nanoparticles, 30 to 60 wt % of colloidal silica nanoparticles, and 30 to 60 wt % of phosphate, and to provide an oriented electrical steel sheet including an insulation coating produced by the composition on the surface of the oriented electrical steel sheet, including 0.005 to 0.05 wt % of any one element selected from boron (B), vanadium (V), or a combination thereof, 2.6 to 4.3 wt % of silicon (Si), 0.020 to 0.040 wt % of aluminum (Al), 0.01 to 0.20 wt % of manganese (Mn), in which the balance is composed of Fe and other inevitable impurities, and a manufacturing method thereof.

Disclosed is a composition for a silica-based insulation layer including hydrogenated polysilazane or hydrogenated polysiloxzane, wherein a concentration of a cyclic compound having a weight average molecular weight of less than 400 is less than or equal to 1,200 ppm. The composition for a silica-based insulation layer may reduce a thickness distribution during formation of a silica-based insulation layer, and thereby film defects after chemical mechanical polishing (CMP) during a semiconductor manufacturing process may be reduced.

Disclosed is a composition for a silica-based insulation layer including hydrogenated polysilazane or hydrogenated polysiloxzane, wherein a concentration of a cyclic compound having a weight average molecular weight of less than 400 is less than or equal to 1,200 ppm. The composition for a silica-based insulation layer may reduce a thickness distribution during formation of a silica-based insulation layer, and thereby film defects after chemical mechanical polishing (CMP) during a semiconductor manufacturing process may be reduced.

The present invention is directed to a composition for the dielectric layer, which composition comprises a mixture of conductive filler material wherein said mixture consists of carbon nanotubes and graphite, and the dielectric layer formed comprises 0.01% to 7% by weight of carbon nanotubes and 0.1% to 20% by weight of graphite. The composition of the present invention may form a dielectric layer which has the desired electrical resistivity. In addition, the dielectric layer is expected to show better barrier properties, less moisture and temperature dependence and improved anisotropic properties.

The present invention is directed to a composition for the dielectric layer, which composition comprises a mixture of conductive filler material wherein said mixture consists of carbon nanotubes and graphite, and the dielectric layer formed comprises 0.01% to 7% by weight of carbon nanotubes and 0.1% to 20% by weight of graphite. The composition of the present invention may form a dielectric layer which has the desired electrical resistivity. In addition, the dielectric layer is expected to show better barrier properties, less moisture and temperature dependence and improved anisotropic properties.

A copper-coated steel wire includes a core wire made of a steel, and a coating layer made of copper or a copper alloy and covering an outer peripheral surface of the core wire. In a cross section perpendicular to a longitudinal direction of the core wire, the core wire includes a plurality of oxide regions composed of an oxide of an element contained in the steel constituting the core wire, the oxide regions including the outer peripheral surface of the core wire and being disposed apart from each other in a circumferential direction of the core wire.

A medium voltage electric cable is disclosed the cable comprising: a conductor; an inner semi-conductive layer arranged in a radially outer position with respect to the conductor; an insulating layer arranged in a radially outer position with respect to the inner semi-conductive layer and directly contacting the inner semi-conductive layer; an outer semi-conductive layer arranged in a radially outer position with respect to the insulating layer and directly contacting the insulating layer; a wire metal screen arranged in a radially outer position with respect to the outer semi-conductive layer; a filler layer arranged in a radially outer position with respect to the wire metal screen and interpenetrating within the wire metal screen, the filler layer being made from an extruded elastomeric low smoke zero halogen (LSOH) composition comprising a polyethylene homopolymer and/or copolymer having a density lower than 0.93 g/cm.sup.3 and a metal hydroxide; and an outer sheath arranged in a radially outer position with respect to the filler layer and directly contacting the filler layer, the outer sheath being made from a low smoke zero halogen (LSOH) composition comprising a polymer mixture of an EVA polymer and polyethylene homopolymer and/or copolymer having a density lower than 0.93 g/cm.sup.3, the polymer mixture being charged with a metal hydroxide and a phyllosilicate clay.

Magnet wire with corona resistant enamel insulation may include a conductor, and at least one layer of polymeric enamel insulation may be formed around the conductor. The polymeric enamel insulation may include a filler dispersed in a base polyamideimide material. The filler may include between 20 percent and 80 percent by weight of silica dioxide and between 20 and 80 percent by weight of titanium dioxide. Additionally, the polymeric enamel insulation may have a thermal index of at least 230° C. and a thermal index that is at least twice that of the base polymeric material.

A coaxial cable system includes an electric conductor to conduct electric power in a gas turbine engine. The system also includes a dielectric tape helically wound to contiguously surround the electric conductor and a flexible conduit disposed to surround and contiguously contact the dielectric tape. A dielectric liquid may be impregnated within the dielectric tape, and a flexible protective cover may concentrically disposed to surround the flexible conduit.