684 results about "Copper coil" patented technology

A HTS RF coil is disclosed having at least a factor of three improvement in the SNR over a comparable copper coil and at least a factor of six improvement in Q over a comparable copper coil. A commercially available HTS tape is formed into a loop. High-Q capacitors are soldered across the loop ends. The silver sheath covering the tape is removed through chemical etching. The coil is placed in a holder for mechanical support and protection and covered with a cover having through holes enabling the coolant to directly contact the HTS coil.

The invention discloses a method for growing large-area graphene on an insulating substrate. According to the method, a growing substrate is taken as an insulating material, a copper foil is taken as a catalyst and a carbon source, nitrogen and protective gas are taken as source gases, and the large-area graphene is grown on the insulating substrate by adopting a two-step (low-pressure growth and high-pressure growth) chemical vapor deposition method and using the short-range catalytic effect of the copper coil through face-to-face contact of the insulating substrate and the copper foil. The method disclosed by the invention is simple in operation of the whole process and low in cost; and the sample preparation is very high in repeatability and is less interfered by external world. The prepared single-layer graphene can be made into a large-area circuit device by using an exposure method without needing a complex transfer technology.

The invention discloses an anti-condensation metal radiant panel device and a manufacturing method thereof. The method comprises the following steps: performing super-hydrophobic treatment on a metal panel by adopting a super-hydrophobic surface manufacturing technology, so as to enable the surface of the metal panel to be in a super-hydrophobic state; then installing a capillary network or a copper coil pipe on a super-hydrophobic metal radiant panel; paving an aluminum foil in the middle so as to ensure that the capillary network or the copper coil pipe is in close contact with the super-hydrophobic metal radiant panel; installing a thermal insulating layer on the upper surface of the capillary network or the copper coil pipe; then covering the thermal insulating layer by use of a cover plate; performing fastening combined installation by use of a fastener, thereby forming the metal radiant panel with a radiation function, a cold supply function and a heat supply function. The radiant panel is capable of preserving the super-hydrophobic characteristic of a lower radiant surface after being put in the air for a long time, so that when the metal radiant panel is used in a radiant cold-supply air-conditioning system, a condensation phenomenon can not occur to the surface in any wet air; the anti-condensation metal radiant panel can be used for thoroughly solving the problem that condensation occurs easily when the radiant panel is used for radiation and cold supply.

This invention is a heat transferring stainless steel alloy foil coil and its production method. The coil is welded by stainless alloy foil straight pipe and bended pipe. The thickness of the straight pipe wall is 0.02mm-0.3mm, while the thickness of the bended pipe wall is 0.15-0.45mm. The production method includes: material prepare, bended pipe production, bended pipe or straight pipe end making and welding. This invention has reasonable structure and easy technique. The chlorine anion resistant capability of the said coil is higher than 100ppm and increases more than 50% times than that of the copper materials. The strength increases one time. The ductility is nearly the same as that of the copper materials. The heat power is higher than that of the existing heat transferring copper coil. All of its heat superconductivity is suitable for various kinds of condensers and evaporators. This invention can be used on various kinds of air conditioners and refrigerating equipments.

The invention provides a treatment copper foil, which is low in roughness and high in peeling strength with an insulating resin substrate. After an absorption treatment, an active processing liquid after being impregnated is low in deterioration rate of the peeling strength, less in penetration amount and excellent in etching property. The copper foil is characterized in that the surface of the copper foil is sequentially equipped with a roughening treatment layer, a chromate layer and a silane coupling agent layer. The ten-point average roughness Rz of the copper foil surface is 1.0 mu m to 2.7 mu m. When the surface of the copper coil with the area thereof 177 mu M2 is measured by purple laser of visible light with the wavelength thereof 408 nm, the average interval S of local peaks is below 0.0230 mm and S does not include 0.

The invention provides a random-direction dynamic vector uniform magnetic field generating device and a control system, and relates to the technical fields of magnetic field generation and control andrelated magnetism testing engineering. The device comprises three groups of orthogonally-placed Helmholtz coils, a non-magnetic structural component and a three-channel current source. The three groups of Helmholtz coils are respectively wound around the X-axis, Y-axis and Z-axis of a space coordinate system, wherein the X-axis, the Y-axis, and the Z-axis are taken as the axes. Each Helmholtz coil comprises two enamelled copper coils which are coaxially wound clockwise in series, wherein the axial spacing of the two enamelled copper coils of the same group is the same as the radius of the enamelled copper coils. A uniform magnetic field in any direction and with adjustable size and variable timing sequence can be generated in the space near the geometric center of the device, thereby effectively solving a problem of the urgent need for uniformity, time-varying, directionality and high precision of the magnetic field.

The invention relates to a production method of a 304 stainless steel and a pure-copper cold compound coiled material. The production method comprises the following process steps of: (1) preparing raw materials: carrying out surface oil-removing and decontaminating treatment on 304 coldly-rolling stainless steel and a pure-copper coiled material; (2) carrying out compound rolling: conveying the 304 coldly-rolling stainless steel and a copper metal material into a compound rolling machine to carry out synchronous room-temperature continuous compound rolling; (3) dispreading and annealing: carrying out the dispreading and annealing on a rolled stainless steel copper compound coiled material on an alloy layer; (4) flattening the stainless steel copper compound coiled material which is dispread and annealed; (5) carrying out bending and strengthening treatment on the flattened stainless steel copper compound coiled material; and (6) carrying out cutlengthing and splitting on the stainless steel copper compound coiled material to form a 304 stainless steel and copper cold compound material. The production method disclosed by the invention has a simple manufacturing process and low production cost; and the corrosion resistance of the steel-copper compound coiled material is strong and no rusts are formed on the end surfaced of the steel-copper compound coiled material, so that the requirements of a plurality of indoor and outdoor decorative materials are met.

The invention discloses a large-scale production method for a chemical vapor deposition (CVD) graphene film. By the adoption of a CVD technology, first, heat treatment is performed on metal substrates under a vacuum state, inert gas and carbon source gas are injected, the carbon source gas is subjected to catalytic pyrolysis on the surfaces of the metal substrates at high temperature, then graphene grows, large-scale growth is achieved by the adoption of the mode that the multiple layers of metal substrates are overlaid, and every two adjacent layers of metal substrates are separated through a separation layer. Through arranging the separation layers, adhesion between the metal substrates is prevented, in addition, deposition of high-quality graphene on each layer of copper coil is not affected, the multiple layers of metal substrates used for graphene growth can be installed on one basal plate, in this way, the capacity which is a hundred times that of a traditional CVD method is achieved through the same reaction furnace, and large-scale production is achieved.

The invention discloses a membrane electrode based on a spiral carbon nanofiber bundle and a preparation method thereof, belonging to the technical field of lithium ion batteries. The membrane electrode comprises a copper coil current collector and the spiral carbon nanofiber bundle growing on the surface of the copper coil current collector, wherein the spiral carbon nanofiber bundle is formed by spirally winding a plurality of carbon nanofibers, and a graphite layer of the carbon nanofibers is vertical to the axial direction of the carbon nanofibers. The preparation method of the membrane electrode comprises the following steps: loading a nickel-based catalyst on the surface of a copper coil; and then growing the spiral carbon nanofiber bundle on the surface of the copper coil by adopting a chemical vapor deposition method. The membrane electrode and the preparation method provided by the invention have the advantages that the unique structure of the membrane electrode enables the membrane electrode to have higher reversible specific capacity, good electrochemical cycle stability and higher multiplying power performance; and the preparation technology is simple, convenient to operate, and easy to implement large-scale industrial production.

The invention relates to a printing technology for high-resistance carbon film layer. The problem to be solved is that the provided technology can effectively realize resistance control on a high-resistance carbon film lamination, further to improve production efficiency and reduce production cost. The technical proposal is that the production technology for the high-precision whole-resistance carbon film laminated plate includes a production technology for a carbon film surface adhering plate in which a carbon film resistor is printed during printing process for the carbon film lamination. The printing process of the carbon film resistor is performed by following steps in sequence: firstly, determining proportion of the conductive carbon ink; and secondly, printing the conductive carbon ink on copper coil contact points at two ends of a resistor on the circuit board to form a carbon film resistor. The geometric shape of the carbon film resistor is determined by the following relationship: resistance of the carbon film resistor is equal to resistance of the formula of the carbon ink multiplied by length of the carbon film resistor and then divided by width of the carbon film resistor, in which the resistance of the carbon film resistor is determined by thickness of the carbon film resistor and the proportion of the conductive carbon ink, and width of the carbon film resistor is determined by thickness of the printed film.

The present invention provides a copper foil for printed circuit boards and a method for manufacturing the same, the copper foil has high visibility of penetrating an insulating base material, and it is possible to avoid inleakage and peeling in a process of manufacturing the printed circuit board. The copper coil for the printed circuit board is characterized in that the copper coil is used for forming a conductor distribution picture of the printed circuit board and is pasted to the surface of the insulating base material, and has a cobalt-nickel alloy plating layer in which a chroma (based on Japanese Industrial Standard JIS Z 8729) c *= (a*2 + b*2) 1/2 of the surface of the copper coil is less than 6 optically detected by spacing the insulating base material.

The invention discloses a negative electrode pole piece made of a graphene hollow sphere loaded tin disulfide composite material and used for a lithium-ion battery. The negative electrode pole piece comprises a current collection body layer (1), an active material layer (2) and a coating layer (3), wherein the active material layer (2) coats one face or two faces of the current collection body layer (1) and the coating layer (3) coats the surface of the active material layer (2); the current collection body layer (1) is a copper coil material; the active material layer (2) is composed of the graphene hollow sphere loaded tin disulfide composite material (4), a conducting agent (5) and a binding agent (6); and the coating layer (3) is a graphene oxide thin film. A composite negative electrode can be used for effectively buffering volume expansion of tin disulfide in a charging/discharging process; and meanwhile, the problems that lithium sulfide is irreversible in the charging/discharging process and lithium polysulfide is dissolved into electrolyte to cause a shuttle effect and the like can also be solved, and the capacity performing and circulating properties of the battery are greatly improved.

A method for cleaning internal surface of a copper coil includes the following steps of pouring appropriate cleaning agents into an entry end of the copper coil, then stuffing three to five cleaning balls into the entry end, pouring cleaning agent into the same entry end, then stuffing three to five cleaning balls, and then blowing in compressed purified air under a pressure ranging from 3 to 6 Mpa and an air flow of 10 to 11 M3/min until the cleaning balls are blown off from the exit end of the copper coil. According to the color of the last cleaning ball, whether the internal surface of the copper coil is cleaned up can be judged. If the last cleaning ball keeps the original color, the internal surface of the copper coil is cleaned up. Then nitrogen can be pumped into the copper coil and an annealing treatment in an annealing stove can be operated; after then a turbidity test can be operated through sampling from the copper coil. According to this method, the compressed purified air is used as the cleaning power source. The compressed purified air is low in cost, convenient to obtain and safe to use. The cleaning cost can be decreased by 50 percent, the pollution to environment can be reduced, and the compressed purified air can also be used as power source for other materials of coils.

The invention provides an omnidirectional piezoelectricity electromagnetic composite wave energy acquiring device, and belongs to the field of energy collecting device designing and manufacturing. A spherical housing is divided into an upper shell and a lower shell, wherein threads which are in mutual cooperation are formed in the openings of the upper shell and the lower shell; the top surface ofthe inner part of the upper shell is a plane, and is provided with four threaded holes; the upper parts of a left spherical hinging seat and a right spherical hinging seat are slabs and are providedwith a pair of screw hole structure, and the lower parts of the left spherical hinging seat and the right spherical hinging seat are provided with a semispherical cavity; the upper part of a pendulumswinging rod is a spherical body, and the lower part of the pendulum swinging rod adopts a round cake shaped structure; a circular permanent magnet is embedded on the lower surface of the round cake shaped structure; the spherical body at the upper part is fixed to the top surface in the upper shell through the clearance fit of the two combined semispherical cavities in the lower parts of the leftspherical hinging seat and the right spherical hinging seat; a part of which the height is one third of that of the inner part of the lower shell, of the lower shell is a plane formed by a solid sphere; grooves which are formed in a regular hexagon shape are annularly formed; the lower parts of bimorph piezoelectricity pieces are embedded in the grooves; and a copper coil is embedded on a plane in the lower shell.