263results about "Inorganic insulators" patented technology

A fabric including within its construction a first elongated electrical conductor crossed by a second elongated electrical conductor, the conductors being normally biased apart at a crossover point of said fibres with an air gap between them, whereby application of pressure in a direction substantially normal to a plane of the fabric causes the conductors to make contact. The fabric may be woven, knitted, non-woven or plaited. The fabric can be used as a pressure sensor, switch or other sensor.

A field grading material includes a field grading effective amount of a nanoparticle filler distributed in a polymeric matrix, and the nanoparticle filler is heterogeneously distributed in the polymeric matrix.

The invention relates to an irradiation crosslinking halogen-free high flame-retardant cable material and a preparation method thereof. The cable materials comprise the following compositions: 45-90 parts of basic resin, 10-55 parts of functional polyolefine resin, 45-125 parts of carbonate hydroxide flame retardant, 30-50 parts of charing agent, 30-50 parts of flame-retardant lubricant, 0.3-3 parts of methyl silicone rubber shell forming agent, 0.5-2 parts of silane surface modifier, 2-5 parts of crosslinking sensitizing agent, 0.2-2 parts of antioxidant, 1-4 parts of lubricant and 0.1-1.0 parts of initiator. The preparation method of the cable material comprises the following steps of: stirring the carbonate hydroxide flame retardant, the charing agent and the flame-retardant lubricant at a high speed for 2 min; and then adding the shell forming agent and continuously stirring at a high speed until the temperature rises to above 100 DEG C, coating the surface of the mixture with the shell forming agent; adding silane coupling agent and stirring for 5-8 min, and carrying out secondary surface treatment; adding initiator-alcohol solution, and discharging after mixing; extruding and pelletizing; finally drying and cooling to obtain the finished cable material product. The flame retardant performance of the product is obviously enhanced, and the product has good shell forming performance in conbustion without droplets.

The dielectric-forming composition according to the invention is characterized by consisting of: composite particles for dielectrics in which part or all of the surfaces of inorganic particles with permittivity of 30 or greater are coated with a conductive metal or a compound thereof, or a conductive organic compound or a conductive inorganic material; and (B) a resin component constituted of at least one of a polymerizable compound and a polymer. In addition, another dielectric-forming composition according to the invention is characterized by containing: ultrafine particle-resin composite particles composed of (J) inorganic ultra fine particles with the average particle size of 0.1 mum or smaller, and (B) a resin component constituted of at least one of a polymerizable compound and a polymer, wherein part or all of the surfaces of the inorganic ultrafine particles (J) are coated with the resin component (B), and the ultrafine particle-resin composite particles contain 20% by weight or more of the inorganic ultrafine particles (J); and inorganic particles with the average particle size of 0.1 to 2 mum and permittivity of 30 or greater, or inorganic composite particles in which a conductive metal or a compound thereof, or a conductive organic compound or a conductive inorganic material is deposited on the part or all of the surfaces of the inorganic particles.

The present invention relates to a passive layer including graphene for the attenuation of near-field electromagnetic waves and heat dissipation. The passive layer blocks electromagnetic waves radiated from an external electronic device or prevents electromagnetic waves generated in an electronic device from emitting to the outside. The passive layer is designed to reduce interference between transmission circuits of a device in the near-field region or influence such as malfunction caused by external electromagnetic waves. The present invention also relates to an electromagnetic device and a circuit board, each including the passive layer.

An aqueous, curable coating composition comprising a mixture of:(a) at least one water soluble alkali metal silicate; and(b) an effective amount of a water-soluble crosslinking agent comprising an alkali metal aluminophosphate, or an alkali metal aluminoborophosphate, or an ammonia aluminophosphate, or an ammonia aluminoborophosphate, or an alkali metal ammonia aluminophosphate, an alkali metal ammonia aluminoborophosphate, or a mixture of two or more of the foregoing phosphates.Preferably, the coating composition will not contain any visually discernable precipitate. The coating composition may be applied to a substrate such as a glass, a ceramic, concrete or a metal and thereafter cured by air drying or by heating to a temperature of up to about 240° C. (or higher, if desired).

Disclosed is an elastomer-conductive filler composite with improved dielectric properties. The composite includes conductive fillers and an ionic liquid dispersing the conductive fillers. The ionic liquid is used as a dispersant to effectively enhance the dispersion of the conductive fillers, achieving a high dielectric constant and a low dielectric loss of the composite without deteriorating the physical properties of the conductive fillers. The use of the ionic liquid can reduce the number of processing steps and the presence of the conductive fillers at a low concentration in the composite can minimize deterioration of the physical properties of the elastomer. Further disclosed is a method for producing the composite.

A cable comprising a semiconductive layer and an insulation layer with improved DC electrical properties is provided.

An improved radio frequency transparent utility meter cover for an automatic meter reading (AMR) system. The cover is manufactured from a strong and chemically inert polyolefin or polypropylene copolymer and includes a non-corroding lock to secure the cover to the meter box frame. The underside of the cover includes a plurality of ribs that lend strength and rigidity to the cover while increasing mounting points for meter unit interface devices.

An electrical conductor for transmission of electrical power, having a total cross-section equal to or above 10 mm² and comprising a plurality of stranded filamentary members, where at least one of the filamentary members is made from microalloyed copper or microalloyed aluminium having annealing temperatures higher than 250° C., and has the side surface thereof totally coated with a fluorinated polymer. The conductor has a better behavior relative to the skin effect and allows operation at high temperatures. Furthermore, if the electrical conductor is suspended, it has a smaller sag and prevents or reduces the accumulation of ice and/or snow.

Dielectric compositions that include compound of the formula [(M′)_1−x(A′)_x][(M″)_1−y−z,(B″)_y(C″)_z]O_3−δ(V_O)_δ and protonated dielectric compositions that include a protonated dielectric compound within the formula [(M′)_1−x(A′)_x](M″)_1−y−z(B″)_y(C″)_z]O_3−δ+h(V_o)_δ(H*)_2h are disclosed. Composite materials that employ one or more of these dielectric compounds together with an electrolyte also are disclosed. Composite material that employs one or more of these dielectric compounds together with an electrochemally active material also are disclosed.

In a film formation method of a semiconductor device including a plurality of silicon-based transistors or capacitors, there exist hydrogen at least in a part of the silicon surface in advance, and the film formation method removes the hydrogen by exposing the silicon surface to a first inert gas plasma. Thereafter a silicon compound layer is formed on the surface of the silicon gas by generating plasma while using a mixed gas of a second inert gas and one or more gaseous molecules, such that there is formed a silicon compound layer containing at least a pat of the elements constituting the gaseous molecules, on the surface of the silicon gas.

Resin compositions including one or more base resins and one or more high dielectric constant materials wherein the one or more high dielectric constant materials are present in the resin composition in an amount sufficient to impart the resin composition with a cured Dk that matches the Dk of the reinforcing material to which the resin composition is to be applied to within plus or minus (±) 15% as well as prepregs and laminates made using the resin compositions.

A nanotube-based insulator is provided having thermal insulating properties. The insulator can include a plurality of nanotube sheets stacked on top of one another. Each nanotube sheet can be defined by a plurality of carbon nanotubes. The plurality of carbon nanotubes can be configured so as to decrease normal-to-plane thermal conductivity while permitting in-plane thermal conductivity. A plurality of spacers can be situated between adjacent nanotube sheets so as to reduce interlayer contact between the nanotubes in each sheet. The plurality of spacers can be ceramic or alumina dots or provided by texturing the nanotube sheets.

The invention discloses a corrugated metallic sheath inorganic mineral insulated cable and a manufacturing method thereof. The cable consists of an inner cable core, an insulating layer winding the outside of the cable core, and an outermost metallic sheath; the cable core is formed by twisting a bundle of copper wires, the insulating layer is an inorganic mineral insulated tape, the metallic sheath is a copper corrugated tube, corrugation of the copper corrugated tube has upper peaks and lower valleys, the cable core, the insulating layer and the copper corrugated tube have the same length, and the surface of the copper corrugated tube is provided with a welding seam with the same length of the copper corrugated tub along the axial direction. As the cable takes a corrugated shape, the cable is easy to be bent and mounted in a laying field, which lowers the construction cost, can prevent a cable conductor and the insulating layer from being directly burnt by flame, prevents a phase and phase conductor from short circuit, and prevents elevators and fire fighting devices from being incapable of operating without power supply, thus obtaining precious time to facilitate persons to escape in time, and reduce property loss.

An electrical cable of the present invention comprises a plurality of spaced, parallel flat conductors. Each of the plurality of flat conductors was previously integral with each immediately adjacent flat conductor. A dielectric material is holds the conductors in the spaced, parallel relationship. The dielectric material can be a polymer film, a nonwoven, or other polymer materials such as PTFE, or expanded PTFE. The cable of the present invention is made by providing first and second webs of dielectric materials and a third sheet of conductive material. The first and second web materials are bonded to the third sheet of conductive material in a face-to-face layered relationship thereby forming a bonded laminate. The bonded laminate is then incrementally stretched to separate the sheet of conductive material in to spaced, parallel flat conductors.

The invention relates to an ultraviolet deep crosslinked halogen-free flame-retardant ethylene-propylene-diene monomer (EPDM) rubber cable material and a preparation method of an insulating or sheathing layer thereof. The method is characterized by comprising the following steps of: mixing and extruding to form the cable material by using EPDM rubber and graft modified EPDM rubber as base materials and compounding a metal hydroxide flame retardant, light initiating bodies of a cationic photoinitiator and a free radical photoinitiator and the like; and then performing molten on-line continuousultraviolet irradiation on a coated cable insulating or sheathing layer in ultraviolet irradiation cross-linking equipment provided with a thermal electronic excited medium-voltage mercury arc lamp or a microwave excited H-shaped, D-shaped or V-shaped electrodeless lamp serving as a specific light source to prepare the ultraviolet deep crosslinked halogen-free flame-retardant EPDM rubber cable insulating or sheathing layer. The technology has unique advantages that: the required cross-linking equipment is low in investment; the process is simple and high in production efficiency; the product has low cost and good quality; and the method is energy-saving and environment-friendly, and is widely used for manufacturing high-performance crosslinked flame-retardant rubber wire and cable products.