287results about How to "Does not affect conductivity" patented technology

The invention relates to an electric heating textile based on a carbon nano tubular membrane. The electric heating textile based on the carbon nano tubular membrane comprises a heating layer, textile protection layers and bonding layers, wherein the upper and lower surfaces of the heating layer are stuck with the textile protection layers by the bonding layers; and the heating layer is the carbon nano tubular membrane. The electric heating textile has the characteristics of stability of heating, uniform temperature, safety, comfort, lightness, portability and the like.

The invention relates to a preparation method of high-conductivity aluminum alloy and belongs to the field of nonferrous metal materials. The preparation method comprises the following steps of: preparing an aluminum ingot comprising the following alloy elements in percentage by weight: 4.5 to 13.5 percent of Si (silicon), 0.1 to 1.5 percent of Mg (magnesium) and not more than 0.1 percent of impurity elements, smelting the aluminum ingot in a furnace, adding 0.1 to 0.3 percent of zirconium which serves as additive for the alloying treatment, uniformly mixing, then adding 0.1 to 1.35 percent of rare-earth element for degeneration, purifying, degassing and deslagging, and covering the surface of aluminum liquid with a solid covering agent; casting to prepare the aluminum alloy conductor material; and carrying out the first-stage aging treatment and the second-stage aging treatment on the aluminum alloy conductor material, discharging and cooling with air. The manufactured aluminum-silicon alloy can meet the requirements on the aluminum alloy material conductivity and the mechanical property; and moreover, the preparation process is simple, the cost is low, and the mass production is easy to realize.

The invention discloses a nanowire cold cathode electron source array with a self-aligned focusing structure and a manufacturing method thereof. The electron source array structure comprises a substrate, a bottom cathode electrode strip, a bottom gate electrode strip, an insulating layer configured to cover the above electrode strips, an annular top gate electrode, a top cathode electrode, a focusing electrode, and a circular nanowire cold cathode array. The bottom cathode electrode strip and the bottom gate electrode strip are arranged on the substrate and are positioned in parallel with each other. The annular top gate electrode, the top cathode electrode and the focusing electrode are manufactured above the insulating layer and are connected with the bottom corresponding electrode strips through etching through holes in the insulating layer. The circular nanowire cold cathode array is manufactured on the top cathode electrode. The invention further discloses a manufacturing method of the nanowire cold cathode electron source array. According to the technical scheme of the invention, the nanowire cold cathode electron source array is provided with the self-aligned focusing structure, so that the row-by-row addressing function can be realized. The manufacturing method is simple, and the prepared nanowire cold cathode electron source array is good in capability of regulating and controlling electron emission and focusing electron beams. Therefore, the nanowire cold cathode electron source array and the manufacturing method thereof have an important application prospect in the aspect of flat plate X-ray sources.

The invention discloses a preparation method for an orderly heterogeneous nano-wire assembling body. The preparation method comprises the following steps of: first, tellurium nano-wires are prepared by a hydrothermal method; then, obtaining a tellurium nano-wire assembling body by an LB assembling method; and finally, generating a tellurium-aurum heterogeneous nano-wire assembling body by taking the tellurium nano-wire assembling body as a template and reacting with a chloroauric acid solution. By the orderly heterogeneous nano-wire flexible conductive film, the flexible conductive film can be obtained by taking polyethylene terephthalate (PET) as a substrate. Compared with the prior art, the method provided by the invention is simple in steps, has the characteristics of economy and rapidness, and is applicable to the macroscopic preparation of a plurality of nano-wire material assembling bodies.

The invention discloses a lithium ion cathode material with high security and a lithium ion battery employing the same. The lithium ion cathode material with high security comprises primary particles of a lithium ion metal oxide and a PTC high-molecular polymer having good conductivity. Secondary ions uniformly doped by the lithium ion metal oxide and the PTC high-molecular polymer by pretreatment of the lithium ion metal oxide and the PTC high-molecular polymer. The PTC high-molecular polymer of the lithium ion cathode material with high security is uniformly distributed in the positive electrode lithium ion metal oxide, has no influence on the conductivity of the positive electrode at a normal temperature. However, when the temperature of the battery raises to 80 DEG C or higher, the size of the doped PTC high-molecular polymer expands to cut off connection between the positive electrode particles, and at the same time, self-resistance of the doped PTC high-molecular polymer increases rapidly to cut off current, so that the security of the lithium ion battery can be effectively guaranteed.

The invention relates to a vibration-damping and noise-reducing jacket for a railway steel rail, belonging to the field of vibration-damping and noise-reducing technology in rail traffic. The vibration-damping and noise-reducing jacket is characterized by comprising a band groove expanding layer, an inverted T-shaped restricting layer and a damping layer, wherein the band groove expanding layer is symmetrically coated on the steel rail bottom and the rail waist along the central line of the steel rail; the inverted T-shaped restricting layer is arranged outside the band groove expanding layer; and the damping layer is bonded between the band groove expanding layer and the restricting layer. The vibration-damping and noise-reducing jacket has the advantages of inhibiting wheel rail vibration and noise radiation from sound source and obviously reducing vibration and noise. The vibration-damping and noise-reducing jacket is simple to manufacture and convenient for field assembly and disassembly without influencing the primary function of steel rail, and is suitable for the areas with requirements on noise of railway, subway and urban light rail in urban district.

The invention relates to a far-infrared carbon fiber composite heating film, which comprises an upper base layer, a lower base layer, a carbon fiber composite heating layer, an upper insulated flame-retardant and heat-resistant waterproof layer and a lower insulated flame-retardant and heat-resistant waterproof layer, wherein the carbon fiber composite heating layer is located between the upper base layer and the lower base layer; and the upper insulated flame-retardant and heat-resistant waterproof layer and the lower insulated flame-retardant and heat-resistant waterproof layer coat the outer sides of the upper base layer and the lower base layer, wherein the far-infrared carbon fiber composite heating film is preferably carbon fiber cloth or carbon fiber composite paper. The far-infrared carbon fiber composite heating film is simple in structure, has good flexibility and can be freely cut and folded; the flexibility is not affected in a low-temperature condition; the load resistance deviation does not exceed 8% after a single side is folded for 1,000 times at a speed of 30times / min; the security and the stability are significantly improved; the service life is long; and furthermore, the far-infrared carbon fiber composite heating film has high external insulativity, high-temperature resistance, open fire resistance and waterproofness, the internal conductivity and the heating property are good and the security is high.

The invention provides a bipolar plate for a high-temperature fuel cell, and a manufacturing method thereof. In the prior art, the fuel cell stack bipolar plate needs to meet the circulation requirements of fuels, oxidants and cooling mediums. According to the bipolar plate, based on the problem in the prior art, the circumferential surface of a cathode plate is coated with an adhesive material through a screen printing technology and positioning design in a scraping coating manner, wherein the adhesive material meets fuel cell working environment requirements; the cathode plate is precisely aligned to an anode plate through a positioning groove, and standing curing is performed to obtain a bipolar plate; the bipolar plate comprises an anode plate, a cooling channel and a cathode plate, wherein both sides of the cathode plate are respectively provided with a flowing channel, the single surface of the anode plate is provided with a flowing channel, and the cathode plate surface with thecooling medium flowing channel is adhered to the anode plate surface with no flowing channel to form the bipolar plate, and the cooling medium flowing channel is formed between the two plates, such that the cooling medium flowing channel is additionally arranged without the increasing of the thickness; and the adhesive liquid distribution and the thickness can be precisely controlled through thescreen printing technology, such that the two plates can be integrally adhered within a certain adhesive liquid thickness range while the conductivity of the bipolar plate is not affected.

The invention is suitable for the technical field of displays, and provides a chip on film (COF) substrate, which comprises a substrate, a protective layer and a metal film protective layer, wherein a welding wire is arranged on the surface of the substrate; the protective layer is arranged in the preset position of the welding wire; the metal film protective layer is arranged on the part, uncoated with the protective layer, of the welding wire. The active metal film protective layer is plated on the welding wire partially exposed in the air on the COF substrate, conduction is not affected, the time of copper corrosion is delayed, and the speed of copper corrosion is slowed. By applying the COF substrate and the manufacturing method thereof and the display panel, disclosed by the invention, the fracture risk of the welding wire on the COF substrate due to corrosion is effectively reduced, thus the using time of a product is increased, and the service life of the product is prolonged.

The invention provides coating for a copper-plating-free welding wire and application thereof and belongs to the field of copper-plating-free welding wires. The coating comprises the following raw materials of, by weight, 30-40 parts of acrylic resin emulsion, 5-10 parts of grapheme, 10-20 parts of nano titanium dioxide, 2-5 parts of calcium stearate, 2-3 parts of a dispersing agent, 1-2 parts of a wetting agent, 1-2 parts of a defoaming agent and 25-40 parts of water. According to the coating for the copper-plating-free welding wire, a coated layer can be formed on the surface of the welding wire, and according to the prepared welding wire, abrasion of an existing copper-plating-free welding wire to a current contact nozzle can be greatly reduced, and the wire feeding performance of the welding wire in the using process can be improved. A uniform and thickness-controllable protective film can be formed on the surface of the copper-plating-free welding wire, the surface of the welding wire is smooth, and the problems of unsmooth wire feeding, harsh electric arc sound, splashing, lots of air holes and the like are prevented.

The invention discloses a preparation method of negative electrode plate of a nickel-metal hydride battery. The preparation method comprises: (1) mixing nano metal hydride alloy, carbon nanotubes and nanographite with a particle size of 5 to 100 nm, and an active substance mixture with a particle size of 5 to 35nm according to a mass ratio of 3:1:1 to 3:0.5:0.5 to obtain a mixture, and preparing a slurry from the mixture, polytetrafluoroethylene (emulsion), and distilled water, wherein polytetrafluoroethylene (emulsion) and distilled water respectively account for 1.5% to 3% and 15% to 30% the mass of the mixture of nano metal hydride alloy, carbon nanotubes and nanographite; and (2) coating the slurry prepared in step (1) on a negative current collector, oven-drying, pressing by a roll crusher, so that the active substance slurry forms an electrode active substance coating on the current collector, cutting, and ultrasonic or laser welding 1 to 5 negative electrode lugs at the reserved blank positions of the current collector. The battery provided by the invention has the advantages of high cycling capacity, long service life and storage life, good large-current discharge effect, and high safety performance.

The invention discloses conductive glue, a preparation method thereof and a circuit board. The conductive glue comprises a resin base body as well as conductive particles mixed in the resin base body, wherein the conductive particles comprise first conductive particles which are tin powder particles. The conductive glue disclosed by the invention substitutes noble metals by tin powder, so that the production cost is reduced on the premise of not affecting the conductive performances. Meanwhile, tin powder is added to substitute noble metals to effectively improve weldability of a printed circuit, so that the conductive glue is more suitable for welding production.