42 results about "Superconducting wire" patented technology

This invention discloses a seven-degree-of-freedom intelligent winding system and method for superconducting magnets suitable for complex irregularly shaped coil frames. The system includes a main frame, a six-axis collaborative robotic arm, a seventh-axis servo cylinder, an integrated multi-functional end effector, a superconducting wire feeding and pre-processing unit, a coil frame positioning and installation unit, and a central integrated control system. The working radius of the six-axis collaborative robotic arm covers the entire space of the small-sized magnet winding station. The seventh-axis servo cylinder works in conjunction with the six-axis collaborative robotic arm to achieve follow-up motion, completing the coil winding work for large-sized magnets. The central integrated control system is based on an industrial PC and a real-time Ethernet bus, integrating a robot control system, motion control card, and tension controller. This invention, through its pioneering seven-axis linkage integrated automatic winding process, reduces the manufacturing cost of irregularly shaped magnets, meets the high-efficiency manufacturing requirements of ultra-large-scale coils, and features a high degree of automation, significantly improving the winding quality and yield of superconducting coils.

The disclosure belongs to the technical field of superconducting wires, and discloses a CuNb composite rod for a low-loss superconducting wire and a manufacturing method therefor. The CuNb composite rod has a multi-level structure specific arranged by Sn rods, CuNb single-core rods and Cu tube, where each CuNb single-core rod is closely in contact with a maximum of four CuNb single-core rods, and a minimum of one Sn rod. The atomic ratio of Nb / Sn is 2.7-3.1, of Sn / (Sn + Cu) is 0.23-0.37; the volume ratio of Nb is 45-59%, of Sn is 22-27%. The Cu tubes are distributed between the close-packed CuNb single-core rods and Sn rods, thus reducing mutual contact between the Nb rods, and enhancing the overall heat conduction capability of the wire. While reducing hysteresis losses, the present disclosure ensures that Nb3Sn superconducting wire has a relatively high critical current-carrying capacity and a practical application value.

The application belongs to the technical field of superconducting wires, and relates to a niobium tri-tin superconducting wire based on oxide dispersion strengthened niobium and a preparation method thereof. The application provides a preparation method of a niobium tri-tin superconducting wire based on oxide dispersion strengthened niobium, which comprises the following steps: compounding stable oxide particles and Nb to obtain an ODS-Nb alloy, assembling the ODS-Nb alloy, a Sn source and a stable matrix to obtain a precursor composite wire; after the precursor composite wire is subjected to stretching processing, heat treatment is performed, so that the ODS-Nb alloy and the Sn source generate a Nb3Sn superconducting phase containing stable oxide particles. The application adopts the ODS-Nb alloy to replace Nb to prepare a niobium tri-tin superconducting wire, and can effectively improve the comprehensive superconducting performance of the niobium tri-tin superconducting wire.

This invention belongs to the field of superconducting wire technology and discloses a high-performance, low-loss NbTi superconducting wire and its preparation method. First, an NbTi rod, an Nb cylinder, and a copper tube are assembled to obtain an NbTi / Nb / Cu composite rod. After removing the surface copper, an NbTi / Nb composite rod is obtained. This NbTi / Nb composite rod is then inserted into a drilled Cu alloy ingot and fitted with a first oxygen-free copper tube to obtain a hexagonal composite rod. Finally, this hexagonal composite rod is arranged in a second oxygen-free copper tube, the gaps are filled, and then subjected to multiple drawing passes, multiple aging heat treatments, and twisting to obtain the NbTi superconducting wire. This method effectively improves the problem of poor core wire deformation in conventional NbTi / Cu superconducting wires, increases the critical current density of the wire, and reduces AC losses, meeting the requirements for superconducting magnets in nuclear fusion devices and other applications.

A method of fabricating a superconducting wire includes forming a buffer layer on the substrate, the buffer layer including an Al2O3 layer, the Al2O3 layer being formed by reactive magnetron sputtering in which first oxygen gas as reactant gas and a sputtering target made of aluminium metal are used, the Al2O3 layer being formed while being supplied the first oxygen gas at a first concentration, the first concentration being a concentration of the first oxygen gas at which an emission intensity of Al in plasma near a surface of the sputtering target is not less than 25% and not more than 80% of a first reference value, the first reference value being the emission intensity of Al at which the concentration of the first oxygen gas is zero; and forming a superconducting layer above the buffer layer.

The application discloses a superconducting wire single-photon detector, a preparation method and a superconducting wire temperature detection method, and relates to the technical field of superconductivity, wherein the superconducting wire single-photon detector comprises a substrate, a superconducting thin film material and a metal electrode, the superconducting thin film material and the metal electrode are arranged on the substrate, the superconducting thin film material forms a nanowire after electron beam lithography treatment, the metal electrode is located at two ends of the superconducting thin film material, and the substrate, the nanowire and the metal electrode are all encapsulated in an encapsulating material.The detector of the application can not only adapt to the low-temperature environment of liquid helium, but also stably generate and send voltage pulses, thereby realizing rapid response and early warning of the superconducting wire quenching.

A superconducting wire includes an element wire group having a plurality of element wires containing MgB2 arranged in a circumferential direction and a radial direction with respect to a center of the wire, a high thermal expansion metal arranged so as to cover the element wire group and having a higher thermal expansion coefficient at room temperature than the element wires, a stabilizer that is arranged so as to cover the high thermal expansion metal and stabilizes superconduction, and a high hardness metal that is arranged so as to cover the stabilizer and has a higher hardness than that of the stabilizer. A method for manufacturing a superconducting wire includes a step of forming an embedding material having precursors of a plurality of element wires accommodated in a multi-tube, a step of wire drawing the embedding material, and a step of heat-treating the embedding material to generate MgB2.

This provides a superconducting wire with high Tc and excellent flexibility. [Solution] A superconducting wire comprises a core material formed of a first material having superconducting properties, and a covering material formed of a second material different from the first material, which also has superconducting properties and covers the core material. In this superconducting wire, one of the first and second materials is MgB2, and the other of the first and second materials is a Cu oxide-based superconducting material.

This invention provides a method for preparing infinite-layer nickel-based high-temperature superconducting thin films using metal-organic chemical vapor deposition (MOCVD). The main concept involves dissolving a soluble metal cation precursor in a solvent at a stoichiometric ratio, forming a thin film precursor on a single-crystal perovskite oxide substrate via MOCVD; subsequently, annealing under a high-oxygen-pressure atmosphere yields a thermodynamically metastable perovskite intermediate; finally, reduction conditions are used to transform it into an infinite-layer nickel-based high-temperature superconducting thin film. The advantages of this method include low cost, suitability for large-scale, large-area preparation of superconducting thin films, flexible control of film composition, and high reproducibility. The superconducting thin film prepared using this method exhibits zero resistance below 40 K and at ambient pressure, promising to promote the large-scale application of nickel-based superconducting materials in superconducting wires and tapes and in electronics, including high-field magnet coils, high-frequency low-loss cables, superconducting computers, superconducting antennas, and superconducting microwave devices.

Disclosed are a superconducting magnet, a plasma device, a nuclear fusion device, and a coil guide for a superconducting magnet, which are capable of properly winding a spiral-shaped superconducting wire surrounding a torus space. [Solution] The present disclosure provides a superconducting magnet in the shape of a spiral that surrounds a torus space, comprising a coil formed of a superconducting wire and a coil guide that forms a winding frame along the curve of the spiral shape, wherein the coil guide is a superconducting magnet in which the torus space side support surface of the inner surface of the winding frame that supports the coil from the torus space side is orthogonal to the principal normal vector of the curve.

This invention belongs to the field of superconducting wire technology and relates to a WIC superconducting wire and its preparation method. The invention provides a method for preparing a WIC superconducting wire, comprising: selecting a superconducting round wire and an aluminum groove wire matching the size of the superconducting round wire; threading the superconducting round wire into the groove of the aluminum groove wire; filling the groove between the aluminum groove wire and the superconducting round wire with a metal powder mixture; and finally obtaining the aluminum groove wire WIC superconducting wire through induction heating and hot-dip tin plating; wherein the metal powder mixture is composed of tin powder, aluminum powder, and titanium powder. This invention adds a metal powder mixture at the junction between the aluminum groove wire and the superconducting round wire, aiming to solve the technical problems of low RRR value and insufficient bonding strength in aluminum-based WIC superconducting wires.

The application discloses a preparation and use method of a NbTi superconducting wire low-temperature inlay welding flux, and relates to the technical field of superconducting wires, and comprises the following steps: heating deionized water to 50-60 DEG C; respectively water-bath heating short-chain alkyl glycoside and polyethylene glycol in the water at 50-60 DEG C for 30-60 seconds; stirring the obtained hot deionized water under the condition of 100-150 r / min, and adding the obtained short-chain alkyl glycoside and polyethylene glycol; and adding xanthan gum and sodium benzoate into the obtained solution in sequence to obtain the flux. The application uses short-chain alkyl glycoside as the main component of the flux; the addition of a thickening agent realizes the physical covering of the copper material surface and prevents the secondary oxidation of the copper material, so that the completely environment-friendly flux meeting the enterprise sewage discharge standard is suitable for the low-temperature inlay welding WIC conventional product with the largest base number, and the obtained WIC product has very low surface residue.

This invention relates to the field of intelligent cable conveying technology, and discloses a high-temperature resistant superconducting cable and its intelligent cable wiring conveying device, including a main unit housing, upper and lower conveying pressure roller assemblies, pressure roller pressure adjustment assemblies, servo motor assemblies, and control components. The control components have built-in modules for real-time acquisition of multi-source physical quantities, data normalization processing, feature parameter extraction, initial parameter generation, clamping pressure correction, displacement PID correction, database comparison and confirmation, speed inversion, and real-time closed-loop feedback. This invention normalizes multi-source physical quantities, extracts clamping adaptation coefficients and temperature influence coefficients, and uses a three-level progressive correction strategy to dynamically adjust the target speed, effectively eliminating pressure fluctuations, displacement accumulation errors, and the influence of high-temperature environments. It achieves millisecond-level closed-loop precise control of the cable conveying process, thereby avoiding cable damage and conveying slippage, significantly improving wiring positioning accuracy and the high-temperature adaptability of the equipment.

The application belongs to the technical field of superconducting wires, and relates to a NbTi superconducting wire suitable for a variable magnetic field and a preparation method thereof. The method uses Nb, Ti and Cu metal powder as raw materials, designs and establishes a gradient distribution NbTi / Cu composite ingot structure model, adopts a laser powder bed melting method to perform partition powder laying according to the designed structure model, and generates the NbTi / Cu composite ingot through layer-by-layer superposition forming through differential laser scanning. The formed NbTi / Cu composite ingot is subjected to extrusion, multi-pass stretching and aging heat treatment to obtain a NbTi / Cu composite wire. The method breaks through the limitation of traditional assembly process in structure design and arrangement precision, and makes each region synergistically act under different magnetic field strengths through the construction of a component gradient structure, so that the stability and adaptability of the wire in the application scene of the variable magnetic field or the wide magnetic field strength range are improved.

The application relates to a short-process preparation method of a superconducting wire, which comprises the following steps: preparing an alloy rod and an oxygen-free copper ingot, drilling a plurality of accommodation holes on the oxygen-free copper ingot through a deep drilling process to obtain a porous copper ingot; assembling the alloy rod into the accommodation holes of the porous copper ingot, and welding a cover plate at the opening of the accommodation holes to obtain a composite copper ingot; performing forward extrusion on the composite copper ingot to obtain a composite copper rod; and repeatedly performing stretching and annealing treatment on the composite copper rod to obtain a superconducting wire with a core wire diameter of 30-100 mu m. The NbTi alloy rod is directly inserted into the porous copper ingot, and the finished superconducting wire with a diameter of 0.3-1.0 mm can be prepared through one-time cleaning, assembling, sealing, extrusion and multiple times of drawing and 3-6 times of annealing processes, and finally, the superconducting wire is subjected to insulating processes such as painting, weaving and wrapping, so that the process cycle is greatly shortened, the production line investment is reduced, and the quality risk is lowered; meanwhile, the production and storage costs of the wire supplier are reduced, and the production demand of small batches and multiple specifications of superconducting wires can be met.

The application belongs to the technical field of superconducting materials, and discloses a high-performance MgB2 superconducting wire and a preparation method thereof. The method comprises the following steps: firstly, uniformly mixing nano-Mg alloy powder and B powder in an inert gas atmosphere according to an atomic number ratio of Mg:B=1:2; secondly, compounding a high-purity Nb rod, a CuNi alloy tube and an oxygen-free Cu tube into an Nb / CuNi / Cu alloy rod, processing deep holes, and then making a single-core wire by loading the mixed powder; thirdly, assembling the single-core wire into a Monel alloy tube, processing into a multi-core composite wire, and obtaining the high-performance MgB2 superconducting wire through high-temperature phase formation heat treatment. The metal elements in the nano-Mg alloy powder can generate metal borides, and the CuNi alloy has both constraint and barrier effects, so that the MgB2 grains of the wire are refined, the connectivity between the grains is improved, and the current-carrying performance is improved.

Forming an oxide superconducting film includes a step of laminating a superconducting layer of an oxide superconducting material. The step of laminating the superconducting layer includes a pyrolyzed film forming step, a polycrystallization step, and a sintering heat treatment step. The pyrolyzed film forming step includes a coating film forming step and a pyrolyzing heat treatment step. In the coating film forming step, a solution of a metal organic compound is applied to form a coating film. In the pyrolyzing heat treatment step, the coating film is heat-treated to thermally decompose an organic component of the metal organic compound so as to form a pyrolyzed film. In the polycrystallization step, the pyrolyzed film is heat-treated to form a polycrystal layer containing polycrystals of the oxide superconducting material. In the sintering heat treatment step, the polycrystal layer is heat-treated to orient the polycrystals so as to form the superconducting layer.

The application discloses a preparation and use method of a high-temperature embedding soldering flux for superconducting wires, and relates to the technical field of superconducting wires, and comprises the following steps: stirring and heating a mixed solution of deionized water and anhydrous ethanol; heating long-chain alkyl glycoside and polyethylene glycol in a water bath; adding the obtained mixed solution of deionized water and anhydrous ethanol into the heated long-chain alkyl glycoside and polyethylene glycol; and adding sodium benzoate into the solution to obtain the flux. The application uses long-chain alkyl glycoside as the main component of the flux, and solves the problem of poor high-temperature resistance of the flux. The special molecular structure of the long-chain alkyl glycoside has the characteristic of adjustable flexible alkyl chain length, and the longer the alkyl chain length, the better the thermal stability of the alkyl glycoside, so that the high-temperature embedding temperature requirement in different stages can be met. The long-chain alkyl glycoside has a micelle structure and has large viscosity, and can be used as a thickening agent to replace organic acid for physical coverage of the surface of copper materials to remove oxidation, and the long-chain alkyl glycoside is decomposed at high temperature, so that the long-chain alkyl glycoside is completely decomposed and has little residue during welding.

According to one embodiment, a superconducting coil apparatus comprising at least one superconducting coil formed of a plurality of turns under a definition that one turn is a portion of a superconducting wire annularly wound for one round, wherein: the superconducting coil has a shape along an outer peripheral surface of a tubular structure having a tubular shape; each of the plurality of turns has a coil longitudinal portion extending along an axial direction of the tubular structure; arrangement form of the coil longitudinal portion is different between a main magnetic field generation region configured to generate a main magnetic field and a magnetic field correction region configured to generate a correction magnetic field.

Provided is a superconducting magnet that can be operated with AC in a state where AC loss is reduced. This superconducting magnet includes: a superconducting coil 102 that is housed in a cryostat 101; and a superconducting current transformer 103 that is housed in the cryostat 101 and includes a primary winding 104 connected to an AC power supply 109 and a secondary winding 105 connected to the superconducting coil 102. The superconducting coil 102 and the secondary winding 105 are configured by winding a superconducting cable 20 in which superconducting wires 10, 90 are spirally wound along the axis of a core material 9.

The present invention is a system that produces zero noise magnetic field, which consists of: a coil made of superconducting wire, a precision current source, a Normally Closed Reed (NC) Relay, a Normally Opened (NO) Reed Relay, a cooling mechanism to maintain the superconductor temperature below the critical temperature. The precision current source generates the necessary initial current to act as source for the superconducting coil. The NO reed relay connects the precision current source to the superconductive coil. When this current start to flow, the NC Relay is used to close a superconductive path of the superconductive coil on to itself. Once the system becomes stabilized, the NO reed relay is made open, cutting off the precision source while the Normally Closed relay is closed, thereby a steady value current keeps flowing inside the superconducting coil with zero resistance and zero magnetic noise.

The utility model relates to superconductive wire before chromium plating nickel plating high -efficient oil -removing cleaning equipment belongs to cleaning equipment technical field, including water tank and fixed frame, the fixed frame is fixed at the back of water tank, the inside fixed support plate of water tank, the upper surface of support plate is fixed with ultrasonic generator, the upper surface of fixed frame is provided with drive mechanism, the right side of water tank is connected with the drainage structure of two numbers, the bottom wall of water tank inner chamber is fixed with a plurality of heating wires. This superconductive wire before chromium plating nickel plating high -efficient oil -removing cleaning equipment, through utilizing the high -frequency vibration energy of ultrasonic wave, produces cavitation effect, and high -efficiently removes the oil dirt on the surface of superconductive wire, through water pump and water jet head, carries out mechanical flushing to superconductive wire, further removes residual oil dirt and impurity, can heat cleaning fluid through heating wire, improves the cleaning effect, reduces the use of chemical solvent simultaneously, realizes the cleaning effect of high -efficient, environmental protection, non -injury.

This invention relates to a method for winding and forming superconducting magnet coils based on tension zone compensation. The invention divides radial tension compensation zones according to differences in radial layer positions and cryogenic residual strain transmission, transforming the tension control target from a fixed number of layers to a cryogenic strain-sensitive region. The upper and lower limits of residual strain are determined by the strain limits of the superconducting wire, the compression limits of the insulation layer, and the correlation amount of thermal shrinkage of the bobbin, ensuring that the winding tension is synergistically constrained by the wire, insulation, and bobbin. Based on this, non-equivalent tension compensation curves are derived for tension segments within the zones and transition segments between zones, reducing abrupt tension changes between adjacent zones. Therefore, this invention can reduce cryogenic residual strain concentration, lower the risk of superconducting performance degradation, insulation crushing, and interlayer microslippage, and improve coil forming quality and cryogenic operational stability.

This invention provides a superconducting switch with a built-in superconducting connector welding fixture. The superconducting switch includes a winding frame, superconducting wire, and two connector cups. The cross-section of the winding frame is "I"-shaped. The vertical section of the "I" shape is used to wind the superconducting wire, and two first through holes are provided on the horizontal section of the "I" shape near the two welding leads. The superconducting wire is wound on the vertical section of the "I" shape, and two welding leads are led out from one end of the vertical section. The two connector cups are spaced apart on the horizontal section with the first through holes. The bottom of each connector cup is provided with a second through hole, and the positions of the two second through holes correspond to the positions of the two first through holes, so that the two welding leads pass through their respective corresponding first and second through holes in sequence and are intertwined with the wire to be welded. The two connector cups are used to hold the welding material and the intertwined wire to realize the welding of the two welding leads with the wire to be welded.

The present application discloses a method for preparing a superconducting composite rod, a superconducting composite rod, and a superconducting wire. The preparation method comprises: bundling a plurality of single-core rods and then placing same into a copper pipe, to form a composite ingot; heating the composite ingot; on the basis of a required diameter, selecting an extrusion container; and performing backward extrusion on the heated composite ingot by using the extrusion container, to obtain a superconducting composite rod. According to the present application, by performing backward extrusion after heating the composite ingot, problems such as severe tail shrinkage, poor filament deformation, and low yield of composite rods obtained by performing conventional forward extrusion are solved.

This invention provides a method for preparing infinite-layer nickel-based superconducting thin films using metal-organic chemical vapor deposition (MOCVD). The main concept involves dissolving a soluble metal cation precursor in a solvent at a stoichiometric ratio, forming a thin film precursor on a single-crystal perovskite oxide substrate via MOCVD; subsequently, annealing under a high-oxygen-pressure atmosphere yields a thermodynamically metastable perovskite intermediate; finally, reduction conditions are used to transform it into an infinite-layer nickel-based superconducting thin film. The advantages of this method include low cost, suitability for large-scale, large-area preparation of superconducting thin films, flexible control of film composition, and high reproducibility. The superconducting thin films prepared using this method exhibit zero resistance below 20 K and at ambient pressure, promising to promote the large-scale application of nickel-based superconducting materials in superconducting wires and tapes and in electronics, including high-field magnet coils, high-frequency low-loss cables, superconducting computers, superconducting antennas, and superconducting microwave devices.

This invention discloses a high-temperature superconducting cable, relating to the field of superconducting cable technology. The high-temperature superconducting cable includes a protective shell, a mounting frame, several superconducting tape assemblies, cooling pipes, and end plates. A cavity for accommodating a second cooling medium is formed between the protective shell and the mounting frame. Adjacent first and second mounting grooves are formed on the mounting frame, allowing the superconducting tape assemblies and the cooling pipes through which the first cooling medium flows to be respectively positioned within their corresponding grooves. This allows the low-temperature first cooling medium to directly conduct and cool the superconducting tape assemblies within a single cable radial cross-section via the cooling pipes and their surrounding walls. Simultaneously, a higher-temperature second cooling medium is introduced into the cavity of the protective shell via inlet and outlet pipes, forming an external thermal barrier. This effectively solves the problems of existing dual-medium superconducting cables, which struggle to achieve efficient synergistic cooling of liquid helium and liquid nitrogen in a compact structure, and the resulting thermal mismatch, dielectric isolation, and performance-cost imbalance.

This invention provides a method for manufacturing a superconducting coil that allows for adjustment of the inter-winding contact resistance in a superconducting coil formed by winding high-temperature superconducting wire, even after winding, and a superconducting coil adjusted in this manner. [Solution] The method for manufacturing a superconducting coil 10 according to the present invention is characterized by comprising: a resistance measurement step S51 for measuring the inter-winding contact resistance value of a superconducting coil 10 made by winding a rare-earth oxide superconducting wire (high-temperature superconducting wire 1) having copper 3a on its surface; and a correction step S53 for correcting the inter-winding contact resistance value by holding the superconducting coil 10 at 100°C to 200°C if the inter-winding contact resistance value in the resistance measurement step S51 is outside a desired range.