95results about "Inorganic insulators" patented technology

The invention discloses a rat-proof and termite-proof flame-retardant medium-voltage cable and a preparation method thereof, and belongs to the technical field of cables. The cable is composed of a conductor, a conductor shielding layer, an insulating layer, a metal shielding layer and a protective sleeve which are sequentially arranged from inside to outside. Linear low-density polyethylene is taken as a raw material of the protective sleeve material, and polyethylene molecular chains are mutually connected through irradiation crosslinking to form a three-dimensional network structure, so that the cable is endowed with excellent mechanical strength and excellent comprehensive performance; by modifying the nano silicon nitride, the agglomeration phenomenon is obviously reduced, the mechanical strength and wear resistance of the cable are enhanced, and the rat-proof and termite-proof effects of the cable are improved; the prepared multi-effect flame retardant contains multiple functional groups, can significantly enhance the flame retardance, mechanical strength and rat-proof and termite-proof effects of the cable, and has long and stable performance. Therefore, the prepared cable is high in mechanical strength and good in wear resistance, has stable and efficient flame retardance and rat-proof and termite-proof effects, and has important application value in the technical field of cables.

The invention discloses a temperature-resistant and wear-resistant three-layer insulated wire and a preparation method thereof, and relates to the technical field of cables. The preparation method comprises the following steps: extruding the inner layer material on the surface of the conductor material to form the inner insulating layer, extruding the modified silicone rubber on the surface of the inner insulating layer to form the middle layer, extruding the outer layer material on the surface of the middle layer to form the outer insulating layer, and curing to obtain the high-temperature-resistant flame-retardant cable material. Wherein the inner-layer material is prepared from low-density polyethylene, an antioxidant 1010, insulating particles, a voltage stabilizer and the like; the modified silicone rubber is prepared from silicone rubber, a boron nitride compound, modified magnesium oxide and the like; the outer-layer material is prepared from the inner-layer material and a boron nitride compound. Due to the introduction of the components such as the insulating particles, the voltage stabilizer and the boron nitride compound, the high voltage resistance, the aging resistance, the wear resistance and the temperature resistance of the crosslinked polyethylene insulated power cable are effectively improved. Therefore, the method has a wide application prospect.

The invention relates to the technical field of metal wires, in particular to a low-voltage aluminum wire and a preparation method thereof, the sectional area of the wire is 35 square millimeters, the wire comprises an aluminum alloy conductor and an insulating layer, the aluminum alloy conductor comprises the following chemical components: 0.7-0.9% of magnesium, 0.4-0.6% of silicon, 0.15-0.25% of copper, 0.08-0.12% of zirconium, 0.05-0.09% of scandium, 0.03-0.07% of silver, 0.01-0.03% of erbium, 0.02-0.04% of vanadium and the balance of aluminum, and the microstructure of the aluminum alloy conductor is in gradient distribution. The center is ultra-fine grains, a transition region contains a nano precipitated phase, the surface layer is of a high-density dislocation and nano precipitated phase synergistic reinforcement structure, the insulating layer is of a double-layer composite structure, the inner layer is a crosslinked polyethylene modified layer, the outer layer is an ethylene-tetrafluoroethylene copolymer modified layer, the electric conductivity is improved to 58% IACS or above, and the tensile strength is improved to 280 MPa or above.

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 configured to have a solar energy absorptivity of less than 0.5 at a wavelength of less than 2.5 microns at an operating temperature in the range of 60 DEG C to 250 DEG C, and a radiation emissivity of greater than 0.5 at a wavelength in the range of 2.5 microns to 15 microns. The coating may have an erosion resistance that is at least 5% higher than that of aluminum or aluminum alloys.

The invention discloses a preparation method of a distributed power generation variable frequency driving cable, and belongs to the technical field of power cables. The prepared cable is composed of a cable core, a filling material, a metal shielding layer, an aluminum-plastic composite layer and an outer sheath layer. Wherein the outer sheath layer is prepared from the following raw materials in parts by weight: 70-90 parts of polypropylene resin, 22-30 parts of ethylene-vinyl acetate copolymer, 15-25 parts of modified magnesium hydroxide and 4-6 parts of lubricant. Polypropylene is used as a matrix, so that the cable is endowed with excellent mechanical property and electrical insulation property; wherein the ethylene-vinyl acetate copolymer can enhance the anti-aging performance of the cable; wherein the modified magnesium hydroxide has good compatibility with a polypropylene matrix, can greatly enhance the flame retardance, smoke suppression, aging resistance and rat-proof performance of the cable, and is stable in performance; therefore, the prepared cable is good in mechanical property, has stable and efficient flame retardance, smoke suppression, aging resistance and rat-proof performance, and has important application value in the technical field of power cables.

The invention discloses basalt flake insulation paper, a preparation method thereof and an insulation wrapping tape for cables, and belongs to the technical field of insulation paper for cables, and the basalt flake insulation paper comprises the following components in parts by weight: 5-15 parts of basalt flakes, 1-3 parts of a thickening agent, 10-30 parts of basalt chopped fibers, 5-20 parts of basalt powder and 200-500 parts of water. According to the invention, basalt scales are adopted as a raw material, and a thickening agent and the like are added to adjust the viscosity and the stability of the basalt scale slurry; the basalt chopped fibers and the basalt powder are added to fill gaps among the basalt flake stacks, so that the tensile strength of the basalt flake flame-retardant and high-temperature-resistant insulation paper is improved; all the components act together to obtain the basalt flake flame-retardant high-temperature-resistant insulation paper. When the insulating wrapping tape for the cable is prepared, the technical problem that an existing insulating wrapping tape for the cable is poor in working performance in a high-temperature environment can be effectively solved.

The invention discloses a polyimide enameled wire and a preparation method thereof, the polyimide enameled wire comprises a wire and a polyimide paint layer arranged on the wire, and the polyimide paint layer is formed by heating and curing a polyamide acid solution containing BeO particles and AlN powder. BeO and AlN in a specific ratio are used as inorganic additives, so that the heat conductivity of the enameled wire is remarkably improved, the heat dissipation performance of the enameled wire is improved, and performance reduction caused by overheating is prevented; the high breakdown voltage of BeO and the good electrical insulating property of AlN are combined, so that the enameled wire is ensured to have stable electrical insulating property in a high-voltage environment; the thermal expansion coefficients of AlN and BeO are close to those of polyimide, so that the stress concentration during temperature change is reduced and the coating is prevented from cracking or peeling due to the common use of AlN and BeO; due to the high heat resistance of BeO and AlN, the enameled wire can stably work in an extremely high-temperature environment, thermal degradation is avoided, and the service life is prolonged. The obtained enameled wire has obvious advantages in the aspects of heat conductivity, electrical insulating property, mechanical property, heat resistance and the like.

The invention relates to a fire-resistant insulating inorganic fiber sleeve, and belongs to the technical field of glass fiber sleeves, and the fire-resistant insulating inorganic fiber sleeve comprises the following steps: dip-coating a layer of fluorinated modified graphene oxide on the surface of a pretreated fiber sleeve to form an insulating coating; coating a layer of silicon polymer on the surface of the insulating coating to form a middle layer; coating a layer of flame-retardant reinforcing material on the surface of the middle layer to form a fire-resistant coating, so as to form a fire-resistant insulating inorganic fiber sleeve consisting of the pretreated fiber sleeve, the insulating coating, the middle layer and the fire-resistant coating; according to the technical scheme, the phosphorus-containing compound is combined with the hydroxyethyl methylacrylate to obtain the flame-retardant compound; the flame-retardant compound is combined with vinyl-containing silsesquioxane, and a flame-retardant reinforced material is obtained; the fluorinated modified graphene oxide is prepared by grafting and modifying the graphene oxide through the fluorine-containing compound, so that the fire resistance, the insulating property, the thermal stability and the mechanical property of the inorganic fiber sleeve are improved on the whole, and the comprehensive performance of the inorganic fiber sleeve is relatively good.

The invention relates to the technical field of rail transit cables, in particular to a preparation method of a bending-resistant sensor cable for a high-speed motor train unit. The preparation method comprises the steps of conductor three-layer twisting and annealing, insulating layer gradient extrusion and plasma treatment, filling, twice wrapping, double-layer shielding, double-layer sheath co-extrusion and irradiation crosslinking post-treatment. The structure of the bending-resistant sensor cable sequentially comprises a high-elasticity fiber rope filler, a copper alloy conductor with a TPEE insulating layer, a thin flame-retardant cloth wrapping layer, an elastic silica gel inner shielding layer, a tinned copper wire and fiber filament outer shielding layer, a thin non-woven fabric wrapping layer and a cross-linked polyurethane double-layer sheath from inside to outside. The bending resistance of the cable exceeds 500,000 times, the cable works stably at the temperature of-50 DEG C to 125 DEG C, the service life is prolonged by 2-3 times, and the cable is suitable for the harsh environment of the high-speed motor train unit.

A laminated structure includes a substrate having a first surface and a second surface provided continuously with the first surface, a first insulating film on the first surface and the second surface, and a second insulating film on the first insulating film and on a corner portion formed at a boundary between the first surface and the second surface, wherein a difference between a thermal expansion coefficient of the substrate and a thermal expansion coefficient of the second insulating film is smaller than the difference between the thermal expansion coefficient of the substrate and the thermal expansion coefficient of the first insulating film.

The invention provides a synchronous crosslinking type flame-retardant cable composite material and a preparation method thereof, and belongs to the technical field of cable materials. Partial discharge is inhibited through high dielectric constant and polarization performance of transition metal zirconium phosphate, a carbonized layer is generated at high temperature, and the flame retardant property is improved; the modified fiber combines high orientation of liquid crystal macromolecules and excellent mechanical and flame retardant properties of polyether-ether-ketone, and forms a block copolymer through dynamic grafting, so that the toughness, fatigue life and thermal stability of the material are enhanced; the silane-metal complex precursor improves the moisture resistance, flame retardance and heat insulation performance of the material through the water sealing effect of a silicon-oxygen network and a micro-ceramic layer generated at high temperature; all the components show a remarkable synergistic effect in the aspects of flame retardance, electrical performance and mechanical performance, multiple flame-retardant barriers are formed, the electrical performance of the material is stabilized, and the overall mechanical performance and interface stability of the composite material are remarkably enhanced.

The invention relates to a heat-conducting intelligent insulating material with nonlinear volt-ampere characteristics, a preparation method and application thereof, and belongs to the technical field of insulating materials. The intelligent insulating material comprises a polymer matrix and a SiC nanofiber felt in the polymer matrix, the volume fraction of the SiC nanofiber felt is 0.5%-2% of that of the polymer matrix, and the SiC nanofiber felt is formed by stacking and assembling SiC nanofibers which are approximately in the same direction; the SiC nanofibers are arranged in parallel or vertically in the polymer matrix. According to the scheme provided by the invention, the heat conduction path of the intelligent insulating material can be optimized, the high heat conduction and nonlinear volt-ampere characteristics of the material are considered, the problem of low heat dissipation efficiency of the packaging material is solved, and the composite material is endowed with low-field-insulation and high-field-conduction electric field self-adaptive regulation and control capability through the nonlinear volt-ampere characteristics; and the problem of aging breakdown when the composite material is faced with an electric field distortion phenomenon is relieved.

The invention discloses a manufacturing method of a mining high-temperature-resistant enameled wire and a product thereof. The manufacturing method comprises the following steps: carrying out gradient annealing treatment on a metal conductor; under the protection of inert gas, dipping the metal conductor in the insulating paint; coating the insulating paint on the surface of the metal conductor through a multi-time coating and baking process; continuously coating a protective layer on the surface of the metal conductor; and continuously carrying out pulse electromagnetic field treatment to finally obtain the required mining high-temperature-resistant enameled wire. Through synergistic interaction of polyimide, the nano boron nitride-aluminum oxide composite filler, the phosphorus-containing flame retardant and the hexagonal boron nitride sheet layer, the high temperature resistance, the heat resistance, the insulativity and the mechanical strength of the enameled wire are remarkably improved, the protective layer is designed outside the insulating layer, the corrosion resistance, the explosion-proof performance and the mechanical performance of the enameled wire are remarkably improved, and the service life of the enameled wire is prolonged. And the device is suitable for high-corrosion, high-humidity and explosive environments of mines, and meets the reliable operation requirements of mine motors under extreme working conditions.

The application discloses a kind of temperature-resistant wear-resistant three-layer insulated wire and preparation method thereof, it is related to cable technical field.The preparation method of the application is: the surface of conductor material is extruded and packed inner layer material to form inner insulation layer, then the surface of inner insulation layer is extruded and packed modified silicone rubber to form middle layer, then the surface of middle layer is extruded and packed outer layer material to form outer insulation layer, and high-temperature-resistant flame-retardant cable material is obtained after curing.In which, inner layer material is made of low-density polyethylene, antioxidant 1010, insulation particle, voltage stabilizer and the like;Modified silicone rubber is made of silicone rubber, boron nitride compound, modified magnesium oxide and the like;Outer layer material is made of inner layer material, boron nitride compound.The introduction of insulation particle, voltage stabilizer, boron nitride compound and the like components effectively improves the high-voltage resistance, aging resistance, wear resistance and temperature resistance of crosslinked polyethylene insulated power cable wire.Therefore, the application has wide application prospect.

A laminated structure is provided with: a substrate having a first surface and a second surface provided so as to be connected to the first surface; a first insulating film provided on the first surface and the second surface; and a second insulating film provided on the first insulating film and at a corner formed at a boundary between the first surface and the second surface, a difference between a thermal expansion coefficient of the base material and a thermal expansion coefficient of the second insulating film being smaller than a difference between a thermal expansion coefficient of the base material and a thermal expansion coefficient of the first insulating film. A method for manufacturing a laminated structure includes: a step for using a substrate having a first surface and a second surface provided so as to be connected to the first surface; a step of forming a first insulating film on the first surface and the second surface; and a step of forming a second insulating film by melting a powder of an organic material and spraying the powder on the first insulating films and the gaps between the first insulating films.

The present invention relates to a method for regulating stress in a SiO2 layer based on a silicon-containing polymer, and belongs to the technical field of silicon-containing polymers. In the method of the present invention, a boron-containing compound is used to modify the silicon-containing polymer. The modified silicon-containing polymer can avoid common defects such as pores and micro-phase separation during thermal annealing, thereby increasing the density of the dielectric layer, reducing the stress of the SiO2 layer, and improving its electrical performance and reliability. The process of the present invention is simple and easy to scale up. The method of the present invention can freely regulate the stress of the SiO2 layer over a wide range. The SiO2 layer prepared in the present invention can provide higher performance in microelectronic devices and has good application prospects.

The invention discloses a modification method of hexagonal boron nitride and silane modified boron nitride, and relates to the technical field of boron nitride. The modification method comprises the following steps: sintering hexagonal boron nitride, and removing boron oxide to obtain modified boron nitride powder; the preparation method comprises the following steps: mixing a silicon source with anhydride, adding tetrabutyl titanate for reaction, and reacting the obtained supramolecular polysiloxane with methoxypolyethylene glycol to obtain hyperbranched polysiloxane; and mixing the modified boron nitride powder and hyperbranched polysiloxane, and adding a pH regulator to hydrolyze the hyperbranched polysiloxane on the boron nitride to obtain the silane modified boron nitride. According to the modification method, the silicon oxide layer is formed on the surface of the boron nitride, so that the performance of the boron nitride in the radiation refrigeration material is greatly enhanced, application is facilitated, and high refrigeration is realized; oxygen-containing sites introduced by the silicon oxide layer can form strong interaction with polymer molecular chains, so that uniform dispersion in a polymer matrix is enhanced, and the overall performance of the composite material is improved.

A laminated structure includes a substrate having a first surface and a second surface provided continuously with the first surface, a first insulating film on the first surface and the second surface, and a second insulating film on the first insulating film and on a corner portion formed at a boundary between the first surface and the second surface, wherein a difference between a thermal expansion coefficient of the substrate and a thermal expansion coefficient of the second insulating film is smaller than the difference between the thermal expansion coefficient of the substrate and the thermal expansion coefficient of the first insulating film. A manufacturing method for a laminated structure includes using a substrate having a first surface and a second surface provided continuously with the first surface, forming a first insulating film on the first surface and the second surface, and forming a second insulating film by melting and spraying an organic material on the first insulating film and in a gap of the first insulating film.

An antenna module is provided. The antenna module comprises a dielectric on which is disposed one or more antenna elements configured to transmit and / or receive a radiofrequency signal; a communication circuit for processing the radiofrequency signal; an interconnect member that is electrically connected with the communication circuit and the antenna elements, wherein the interconnect member optionally contains a substrate on which a metal coating is disposed; and optionally, a shield member covering the communication circuit that contains a substrate on which a metal coating is disposed. The dielectric, the substrate of the interconnect member, and / or the substrate of the shield member contain a polymer composition comprising silicate fibers distributed within a polymer matrix that includes a thermotropic liquid crystalline polymer.

The invention discloses a manufacturing method of a high-frequency dielectric material and a semiconductor packaging substrate, and the high-frequency dielectric material comprises inorganic filler, bonding resin, film-forming resin, a curing agent and an accelerant. The high-frequency dielectric material provided by the technical scheme of the invention has a coefficient of thermal expansion (CTE) as low as 30 ppm / DEG C or below, a glass transition temperature (Tg) as high as 160 DEG C or above, a dielectric constant (Dk) between 3.0 and 3.3 at a specific high frequency and an extremely low dielectric loss (Df) between 0.0015 and 0.0025.

The invention relates to the technical field of multi-core cables, and particularly discloses a light, high-flexibility and bending-resistant multi-core data transmission cable for rail transit and a preparation method of the light, high-flexibility and bending-resistant multi-core data transmission cable. The multi-core data transmission cable for rail transit comprises a cable core, an insulating layer and a sheath layer, the insulating layer comprises the following raw materials in parts by weight: 30-40 parts of linear low-density polyethylene, 7-16 parts of an acrylic monomer, 3-6 parts of pre-oxidized fibers, 2-5 parts of boron nitride nanosheets, 1-2 parts of a coupling agent, 10-15 parts of a compatilizer, 3-5 parts of a crosslinking aid and 0.5-1.5 parts of a lubricant; the sheath layer comprises the following raw materials in parts by weight: 20-30 parts of polyvinyl chloride, 20-30 parts of maleic anhydride grafted polyvinyl chloride, 10-15 parts of a compatilizer, 7-10 parts of succinic anhydride, 5-6 parts of lignin, 1-2 parts of a coupling agent, 2-6 parts of a lubricant, 0.5-2 parts of a high-temperature-resistant oxidant and 5-10 parts of a cross-linking aid. The multi-core data transmission cable has high flexibility and good bending resistance, and meets the lightweight requirement of the rail transit multi-core cable.

To provide titanium oxide particles and a method for producing the same, the titanium oxide particles having a high anatase content, reduced coarse particles, and superior uniformity and dispersibility.SOLUTION: A method for producing titanium oxide particles is provided, comprising: a reaction step in which a raw material gas (G1), containing titanium tetrachloride and an inert gas, and an oxidizing gas (G2), containing at least one of oxygen gas and water vapor as well as an inert gas, are introduced into a reaction tube to generate a reaction gas; and a cooling step in which the reaction gas is cooled by introducing a cooling gas, thereby yielding titanium oxide particles, in which the ratio FG1T / FG1, which is the flow rate (FG1T) of titanium tetrachloride in G1 to the flow rate (FG1) of G1 in the reaction step, is 0.4 or more and less than 1.0, and the ratio of a TiO2 mass (kg) after introduction of the cooling gas in the cooling step to a total gas volume (m3), (TiO2 mass) / (total gas volume), is more than 0 and 0.21 kg / m3 or less.SELECTED DRAWING: Figure 1

The utility model provides an insulating covering film and a composite component, the insulating covering film is excellent in insulating property and heat resistance, does not need winding operation like a ceramic tape, does not generate the problems of uneven winding, gaps or stripping, and can easily cope with a conductive base material with a complex shape. The insulating film (1) is obtained by dispersing at least an inorganic material (20) in a first base material (10) containing silicone. In addition, a material of the first base material (10) or a material of a second base material having a component different from that of the first base material (10) may be impregnated. The insulating film (1) is formed, for example, by dip coating.

A dielectric material and a method of forming the same. A dielectric material is provided comprising a film comprising a layer of a two-dimensional (2D) material wherein the film has a dielectric constant ([kappa]) < = 3.0. A method of forming the dielectric material is also provided.

The invention discloses a direct current bushing with a fluorinated electron barrier layer and an insulation enhancement method thereof. A high-voltage guide rod structure comprises a power transmission side guide rod and a valve side guide rod, an amorphous fluorinated layer is arranged on the surface of the power transmission side guide rod; and a microcrystal fluorinated layer is arranged on the surface of the valve side guide rod. Wherein the power transmission side guide rod is heated and then subjected to a surface fluorination reaction under three-stage dynamic pressure regulation and control; and the valve side guide rod performs surface fluorination reaction by adopting two-stage temperature control and three-stage progressive pressure regulation and control. Fluorine atoms are introduced to the surface of the high-voltage guide rod to fluorinate the high-voltage guide rod, the surface valence band structure is changed, the electron work function is improved to inhibit electron field emission, and the surface flashover risk of a sleeve is reduced, so that the dielectric strength of a direct-current power transmission gas insulation system is improved.

A high voltage electrical component for an electric vehicle is provided. The component comprises a polymer composition that includes a polymer matrix containing a liquid crystalline polymer. The composition exhibits a comparative tracking index of about 125 volts or more as determined in accordance with IEC 60112:2003 at a thickness of 3 millimeters. Further, the composition defines an orange surface that is characterized by a L* value of from about 55 to about 75, an a* value of from about 18 to about 38, and a b* value of from about 22 to about 42, wherein L*, a*, and b* are calculated using CIELAB units according to ASTM D2244-16.

An encapsulated nanoribbon having a nanotube of a dielectric material, wherein the nanotube has a diameter and a first length, and a nanoribbon at least partially encapsulated within the nanotube, the nanoribbon including a transition metal dichalcogenide and having a width and a second length, the second length being coextensive with the first length, and the width being no greater than the diameter. Also disclosed are methods of making the encapsulated nanoribbon.

The application discloses a special cable suitable for high-torque robots. The cable comprises a conductor, an insulating layer, a shielding layer and a sheath layer, the insulating layer is located outside the conductor, the shielding layer is located outside the insulating layer, and the sheath layer is located outside the shielding layer. The raw material of the sheath layer comprises the following components: 40-50 parts of linear low-density polyethylene, 30-40 parts of methyl vinyl silicone rubber, 1-2 parts of a crosslinking agent, 15-25 parts of modified silicon dioxide, 0.5-1 part of an antioxidant and 1-2 parts of a lubricant. The anti-torsion, wear resistance and flame resistance of the cable are improved by optimizing the material formula of the sheath layer, so that the cable can adapt to the frequent movement and complex working conditions of high-torque robots.

A hybrid compound for insulating a substrate is formed by dispersing functionalized inorganic nanomaterials in a non-toxic reagent at a controlled pH using volatile bases to form an aqueous dispersion. The aqueous dispersion is then stirred to form the hybrid compound. The compound is then applied to a substrate and dried to from an insulating layer. The insulating layer protects the substrate from temperatures exceeding 1200 degrees Fahrenheit.

The invention discloses a nano aluminum-plastic soft alloy insulating material, which belongs to the technical field of cable materials, and effectively improves the temperature resistance and scratch resistance of electric wires through a special formula and a special manufacturing process, the temperature resistance grade of the electric wires can reach 150 DEG C, and the scratch resistance is improved from 30 times of ordinary materials to more than 100 times. The electric wire produced by using the material disclosed by the invention is used for a battery, a motor temperature sensing wire, a motor control wire and a motor power supply transmission wire on a new energy automobile, and the physical temperature resistance and the mechanical wear resistance of the electric wire are greatly improved.