A capacitor is provided. The capacitor includes a first electrode layer and a second electrode layer; and a first dielectric layer and a second dielectric layer, wherein the first dielectric layer and the second dielectric layer are disposed between the first electrode layer and the second electrode layer. The first dielectric layer includes a first dielectric powder and a first organic resin, and the second dielectric layer includes a second dielectric powder and a second organic resin. In particular, the weight ratio of the first dielectric powder to the first organic resin is greater than the weight ratio of the second dielectric powder to the second organic resin.

A manufacturing method for manufacturing a dielectric layer included in a reflective electromagnetic wave absorber, the method including the steps of: preparing a resin composition containing at least one dielectric compound and a resin component, and having a relative permittivity higher than 10.0 at a frequency of 3.7 GHz or 90 GHz; and forming a dielectric layer made from this resin composition and having a thickness of 20 to 7000 m. A resin composition according to the present disclosure is used to form a dielectric layer included in a reflective electromagnetic wave absorber, the resin composition containing at least one dielectric compound and a resin component, and having a relative permittivity higher than 10.0 at a frequency of 3.7 GHz or 90 GHz.

An apparatus includes a strength member including a core formed of a composite material, and an encapsulation layer disposed around the core. A conductor layer is disposed around the strength member. A coating is disposed on the conductor layer. The coating is formulated to have a solar absorptivity of less than 0.5 at a wavelength of less than 2.5 microns, and a radiative emissivity of greater than 0.5 at a wavelength in a range of 2.5 microns to 15 microns, at an operating temperature in a range of 60 degrees Celsius to 250 degrees Celsius. The coating may have an erosion resistance that is at least 5% greater than an erosion resistance of aluminum or aluminum alloys.

A dielectric composite includes: at least one first dielectric material represented by Chemical Formula 1, and at least one second dielectric material represented by Chemical Formula 2, wherein the first dielectric material has at least one first crystal structure and the second dielectric material has a second crystal structure that is different from the first crystal structure, and the first dielectric material and the second dielectric material are agglomerated with each other,
A.sup.11.sub.1-xA.sup.12.sub.xB.sup.1.sub.2O.sub.6Chemical Formula 1
A.sup.21.sub.2(1-y)A.sup.22.sub.2yB.sup.2.sub.2O.sub.7.Chemical Formula 2

The present disclosure relates to electrical machines. The teachings thereof may be embodied in a corona shielding system, especially for an electrical machine, e.g., a high-voltage machine, such as a generator for generation of electrical energy, an electric motor, or another piece of electrical equipment having a relatively high rated voltage, e.g., a transformer or a bushing or a cable. A corona shielding system may include: a polymeric matrix; and filler particles comprising mica surrounded by a layer of at least one ceramic metal oxide. The filler particles may be distributed throughout the polymeric matrix.

An electric cable for high-voltage applications is disclosed which comprises a core surrounded by an electrically insulating layer made of a composition based on a thermoplastic polymeric material charged with boron nitride powder in an amount up to 20 wt % with respect to the weight of the insulating composition, the boron nitride powder having a particle size distribution D50 up 0 to 15 m. Such a cable has improved thermal conductivity property as well as good dielectric resistance and workability in particular through extrusion processes.

A thermally conductive, electrical insulating nonwoven material is described that comprises 20 wt. %-50 wt. % organic components, wherein the organic components comprise wherein the organic components comprise organic drawn fibers, organic bi-component binder fibers, and a polymer latex binder comprising at least one of an acrylic latex, an acrylic copolymer latex, a nitrile latex, and a styrene latex; and 50 wt. %-80 wt. % inorganic components wherein the inorganic components comprise a blend of thermally conductive fillers and clay. The organic bi-component binder fibers have a polymeric core and a sheath layer surrounding the polymeric core wherein the sheath layer has a lower melting point than the core.

An electric cable for high-voltage applications is disclosed which comprises a core surrounded by an electrically insulating layer made of a composition based on a thermoplastic polymeric material charged with boron nitride powder in an amount up to 20 wt % with respect to the weight of the insulating composition, the boron nitride powder having a particle size distribution D50 up to 15 m. Such a cable has improved thermal conductivity property as well as good dielectric resistance and workability in particular through extrusion processes.

An electric wire includes: a conductor; and an insulator that covers the conductor. The insulator includes a resin material and a first filler. The insulator includes the first filler at a proportion of 10% by mass or more and 40% by mass or less. The first filler is a chemical substance produced from a biological material.

The present disclosure relates to insulation. Teachings thereof may be embodied in a solid insulation material, especially in tape form, the use thereof in a vacuum impregnation process and to an insulation system produced therewith, and also an electrical machine comprising the insulation system, especially for the medium- and high-voltage sector, namely for medium- and high-voltage machines, especially rotating electrical machines in the medium- and high-voltage sector, and to semifinished products for electrical switchgear. For example a solid insulation material with an anhydride-free impregnating agent may include: a carrier; a barrier material; a curing catalyst; and a tape adhesive. The curing catalyst and the tape adhesive are inert toward one another but react under the conditions of a vacuum impregnation process if combined with an anhydride-free impregnating agent having gelation times of 1 h to 15 h at impregnation temperature. The tape adhesive is free of oxirane groups and includes at least two free hydroxyl groups.