243 results about "Superconductivity" patented technology

Novel articles and methods to fabricate same with self-assembled nanodots and/or nanorods of a single or multicomponent material within another single or multicomponent material for use in electrical, electronic, magnetic, electromagnetic and electrooptical devices is disclosed. Self-assembled nanodots and/or nanorods are ordered arrays wherein ordering occurs due to strain minimization during growth of the materials. A simple method to accomplish this when depositing in-situ films is also disclosed. Device applications of resulting materials are in areas of superconductivity, photovoltaics, ferroelectrics, magnetoresistance, high density storage, solid state lighting, non-volatile memory, photoluminescence, thermoelectrics and in quantum dot lasers.

Devices incorporating a single to a few-layer MoS₂ channels in combination with optimized substrate, dielectric, contact and electrode materials and configurations thereof, exhibit light emission, photoelectric effect, and superconductivity, respectively.

The invention discloses a Ni-base alloy composite base band prepared by a hot isostatic pressing method, belonging to the technical field of a high-temperature coating superconductivity base band. The preparation method comprises the following steps: putting NiW powders (code A) and NiW alloy powders (code B) into a die according to an A-B-A sequence, wherein the atom percent of W of the NiW powders is 3-7%, and the atom percent of W of the NiW alloy powders is 9-12%; pressing and sintering by the hot isostatic pressing to obtain an initial composite billet with even diffused ingredients and favorably combined inner and outer layers and; cold rolling the composite billet with the pass distortion of 3-15% and the total distortion of more than 95%; and obtaining a cold rolling base band with a thickness of 80-150 mu m; annealing the base band for 0.5-2 hours under the protection of an Ar/H2 mixed gas at the temperature of 1000-1400 DEG C to obtain the Ni-based alloy composite base band. The composite base band has high mechanical strength and strong double-shaft texture.

The invention discloses a converging enhancement photo-response superconductivity single photon detector and a preparing method thereof. The converging enhancement photo-response superconductivity single photon detector comprises a magnesium oxide (MgO) substrate, a superconductivity single photon detector, a transparent medium isolation layer, a metal reflecting layer, a transparent medium layer, a metal barrier layer and a metal grating layer. The superconductivity single photon detector, the transparent medium isolation layer, the metal reflecting layer, the transparent medium layer and the metal grating layer grow on the MgO substrate in sequence from the lower upward. The metal barrier layer is located on the periphery of the transparent medium layer, and connected with the metal reflecting layer and the metal grating layer. The metal grating layer is of a homocentric metal multi-loop structure. The metal reflecting layer is composed of a metal ring and a transparent medium ring, and the metal ring and the transparent medium ring are homocentric. The converging enhancement photo-response superconductivity single photon detector converges incident signal light in a large area scope onto a superconductivity single photon detector photosensitive surface with small area so as to observably improve responses of the superconductivity single photon detector, and can improve the responses by 30 times to the utmost.

The invention relates to liquid alloy, a preparing method of the liquid alloy and application of the liquid alloy. The liquid alloy comprises the components, by weight part, of 1 part to 90 parts of gallium (Ga), 1 part to 75 parts of indium (In) and 1 part to 40 parts of tin (Sn). The liquid alloy has the superconductivity property in the critical temperature and belongs to nonideal type II superconductors. In addition, the liquid alloy has the excellent characteristics of being convenient to use, wide in application scope, low in cost, free of poison, good in mobility and excellent in electrical conductivity and heat conduction. The preparing method of the liquid alloy also is simple and high in efficiency, achieves environment friendliness and is economical. The liquid alloy can further by widely applied to electric connection of electronic components, electronic circuit boards and self-repairing conductors.

The invention relates to a method for preparing a high W-content Ni-W alloy base band with superconductive coating, pertaining to the technology field of the superconductive enhanced toughness base band with high temperature coating. The method aims to solve the problem that the mechanical strength and magnetism of the prior Ni-W base band can not satisfy further wide application of YBCO coating conductor. The method comprises the following steps: (1) The Ni and W power are mixed by a high-energy ball milling; (2) a high W-content (7 to 9.5 percent) Ni-W alloy billet is prepared using cold isostatic pressing method in power metallurgy; (3)the billet is warmly rolled using a high finish roller, and 2 to 5 percent of pass deformation is used;(4) the surface oxide is removed by acid cleaning; (5) the rolled base band is recrystallized and annealed to obtain the Ni-W alloy base band. The base band prepared by the method has the advantages of high cube texture, high mechanical strength, low magnetism or no magnetism, high finish of surface, easy industrial production, etc. Moreover, the method can meet the coating conductor base band of the epitaxially growing transition layer and superconductor layer.

The invention relates to a high magnetic rotational flow self power generation vacuum superconductivity quadruple effect paraffin control and viscosity reduction device and belongs to the new field of electromagnetic application and vacuum superconductivity heat transfer technologies. The device comprises a high frequency pulse hydraulic oscillation paraffin control and viscosity reduction device, a high magnetic rotational flow self power generation device, an upper adapter connector and a lower adapter connector which are connected in series from bottom to top through threads in a single-stage mode or a multi-stage mode. The upper adapter connector is arranged on the upper portion of the device and connected with an oil pump, and the lower adapter connector is arranged on the lower portion of the device and connected with a tail pipe. The connection positions of the devices can be combined and interchanged randomly, and inclined jet flow holes for forming rotational flow are formed between the stages and are communicated. Compared with the existing paraffin control and viscosity reduction devices, the device has multiple advantages of high frequency pulse hydraulic oscillation paraffin control and viscosity reduction, high magnetic paraffin control and viscosity reduction, high magnetic rotational flow self power generation paraffin control and viscosity reduction and vacuum superconductivity high efficiency heat transfer paraffin control and viscosity reduction, can greatly reduce oil flow resistance, has a remarkable oil increase effect, is a paraffin control and viscosity reduction fundamental long-acting device small in thick oil development investment, long in effect, simple and convenient to construct, and is applicable to large scale popularization and application.

The invention discloses a strong magnetic iron remover with low temperature superconductivity, a cryostat is arranged on an outer cover of the invention, and the cryostat is hoisted on an inner wall of the outer cover through a pull-rod. The cryostat is provided with an indoor temperature Dewar, a 4.2K Dewar is arranged in the indoor temperature Dewar, a heat radiation screen is arranged between the indoor temperature Dewar and the 4.2K Dewar, gaps are arranged in perimeters between the indoor temperature Dewar and the heat radiation screen and between the heat radiation screen and the 4.2K Dewar, a superconducting coil can be coiled in insulation on an inner cylinder of the 4.2K Dewar, and power can be provided for the superconducting coil by a pair of two-dimensional electric currents lead-in wires. A vacuum state is between the indoor temperature Dewar and the 4.2K Dewar, and the 4.2K Dewar is filled with liquid helium20. The invention has great magnetic induction intensity, and can suck out tiny iron magnetic substances from materials, and has high working stability.

The invention relates to a high-temperature superconductive cable coiler, which comprises track (500), back support (200) for fixing the ball lead screw (400) and superconductive cable, front back support (800) for fixing cable, insulated band lapping machine (700), and superconductive coiling machine (600), wherein the invention also provides a relative method which comprises: lapping the coiled high-temperature superconductive band material on one adjustable leg, and drawing out all the band of feeding disc, according to adjusted angle, to be lapped on the surface of cable skeleton (300) and adhered; the coiling plane (608) formed by band material forms angle (609) with cable skeleton (300), while it is tangent with the plane of cable skeleton (300); the coiling lapping head (603) rotates one time around the axle; and the superconductive band coiling machine is linked to move one length of cable coiling step; and the band material will be packed on the cable skeleton, without torsion angle, to avoid hurting band material caused by over large torsion angle, to damage the superconductivity.

The invention provides a superconductivity copper foil tape, which has good ultra-high conductivity and direct welding capacity, is applied to key parts of ultra-precision electrical and electronic components, and is not easily oxidized. The superconductivity copper foil tape is characterized in that a conductive self-adhesive layer is attached on the upper surface of anti-sticking silicone-coating oil paper, and tin-plated copper foil is attached on the upper surface of the conductive self-adhesive layer. The copper foil tape which is coated with a conducive adhesive with ultra-low resistance leads the copper foil to be convenient to be bended and crimped, has ultra-high conductivity and direct welding capacity, is not easily cracked, and is suitable for electronic components and punching type processing.

The invention discloses a preparation method of a high temperature superconductive film adopting a modified low fluoride solution method, which comprises the following steps: dissolving yttrium oxide, barium acetate and copper acetate as raw materials in a solvent using a complexing agent to obtain a low fluoride yttrium barium copper oxygen solution, preparing a gel film and drying, and performing pretreatment and end treatment of the film. The sol has easily adjustable composition, stable performance and good film forming property, the yttrium barium copper oxygen superconductive film can be easily prepared using the sol, and the heat treatment cycle is short and the process repeatability is high. In addition, the solution avoids the introduction of amine group, so as not only to avoid the loss of copper in the heat treatment, but also to avoid the problem that the film is easy to craze. The method of the invention is also used for preparing large-area or long-distance yttrium barium copper oxygen films and coated conductors, the obtained yttrium barium copper oxygen film has good surface smoothness and has good superconductivity.

The invention relates to an ocean wave canard superconductive magnetic fluid power generation system and an ocean wave canard superconductive magnetic fluid power generation method, wherein ocean wave energy is converted into swinging kinetic energy which is directly converted into electrical energy by a superconductive magnetic fluid power generation device; the width of ocean wave canard wave pendulums are changed, and the energy value of ocean wave energy accumulated by the system is changed; the shape of the wave pendulums is as follows: tails of the wave pendulums are cylinders the radius of which is R, backsides of the wave pendulums are straight lines, canard toes are cambered, and canard heads are round; upper parts and lower parts of the wave pendulums are connected with rotating shafts respectively; the rotating shafts are connected with transmission rods which are connected with and drive a piston of a hydraulic pump; liquid metals are arranged inside the hydraulic pump which is connected with the superconductive magnetic fluid power generation device; and a cooling apparatus is connected with the superconductive magnetic fluid power generation device. The ocean wave canard superconductive magnetic fluid power generation system drives the liquid metals to flow to and fro in a straight-pipe power generation channel of the superconductive magnetic fluid power generation device, so as to generate induced electromotive force and then generate electricity. The system is simple and reliable and has small maintenance. Moreover, the kinetic characteristics of the generators are tallied with motion of the waves, so that the conversion efficiency of the system is greatly improved.

The present invention provides a fault detection system and a detection method for a quench-type superconducting fault current limiter. The present invention is characterized in that the present invention consists of a full wave rectification module, a logic circuit module, an analog-digital conversion module, a superconducting control switch module and a current rate detecting module. The working method of the present invention is as follows: (1) signal collection, (2) signal treatment and transmission, (3) analog-digital conversion and output, (4) current limiter operation determination. The present invention has the advantages that as follows: 1. a hardware apparatus is combined with a computer software programming; the hardware apparatus is of simple design and the software programming is easy to be understood; 2. a di/dt fault current rate is adopted to control the operation of the superconducting fault current limiter, which avoids the incorrect operation under the traditional control method; 3. the analog-digital conversion module is cooperated with the logic circuit, so the operation of the superconducting fault current limiter is more accurate and reliable; 4. the data calculation and data processing ability with high speed of the computer is used, so the reliability of the control system is greatly improved.

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 relates to a device and method for testing the superconductivity of a three-dimensional low-temperature superconducting thin film coil, belonging to the field of a low-temperature superconductivity technology and high-accuracy measurement. Particularly, the superconductivity test is carried out on the three-dimensional low-temperature superconducting thin film coil, the superconductivity of the three-dimensional low-temperature superconducting thin film coil is tested and researched by means of a vacuum and low-temperature environment provided by a low-temperature environmental system and a vacuum environmental system provided by the invention, and further the three-dimensional superconducting thin film coil is designed in an auxiliary manner. The invention designs a low-temperature system for testing the superconductivity of the three-dimensional low-temperature superconducting thin film coil, therefore, a low-temperature environment needs to be provided for superconducting coils, as described in the background technology, in the low-temperature environment provided by the invention, liquid helium is utilized as a refrigerant, and the working temperature of a testing system is ensure to reach 4.2K, namely minus 269 DEG C. Therefore, as the tested three-dimensional low-temperature superconducting thin film coil is a core part in payloads of an STEP (satellite test of the equivalence principle) jointly developed by the NASA (National Aeronautics and Space Administration) and the ESA (European Space Agency), the device and method provided by the invention belong to applied aerospace science and technology in terms of technology application.

The invention relates to a graphite wire, a production process for the graphite wire and production equipment for the graphite wire. The graphite conducting wire comprises a plurality of pieces of glass filament fiber which is arranged into a row and is stuck together; and one side of the glass filament fiber is compounded with a first layer of graphite worm composite paper, and the other side of the glass filament fiber is compounded with a second layer of graphite worm composite paper. The production equipment for the graphite conducting wire comprises a wire holder, a gluing device, a heater, a slitting machine, a rolling machine and a coiling device. The production process for the graphite conducting wire comprises the following steps of: arranging wire rows; gluing the wire rows; heating, and then compounding into graphite paper through a compression roller; and twisting the graphite paper into graphite wire harness. The invention has the advantages that the graphite wire has superconductivity and long service life; the equipment is easy to operate; personnel investment is low; and raw materials are saved.

The invention discloses a pulsed power supply based on a superconductivity normal-conductivity combined pulse transformer, and the pulsed power supply is characterized in that a primary coil and a secondary coil of the superconductivity normal-conductivity combined pulse transformer adopt a different end serial-connection structure; when a power supply charging switch is closed, initial power supply charges a primary secondary coil in serial connection; and when the power supply charging switch is disconnected, partial energy in a primary superconductivity coil is transferred to a capacitor, and other energy is sensed to a secondary normal-conductivity coil through mutual inductance and then charges a load through the secondary normal-conductivity coil. After the transferring of the power is completed, the voltage of the capacitor reaches a maximal value, when a discharging switch is closed, and the load is discharged during the process that the capacitor charges the primary superconductivity coil in an opposite direction so as to complete the second pulse output. The pulsed power supply integrates the energy storage and discharging, large-current pulse can be outputted within a short time, and the pulsed power supply has advantages of small size, light weight and high energy conversion efficiency and has a promising application prospect and vast economic benefit.

A connection arrangement for electrically interconnecting the shields of so-called “cold-dielectric” superconductor cables in the context of a muiltiphase superconductive electrical link, each superconductor cable comprising a central superconductor presenting superconductivity at cryogenic temperature, electrical insulation surrounding the central conductor, a shield surrounding the electrical insulation, and a cryostat surrounding said shield. According to the invention, the arrangement comprises a superconductive link between said shields, said superconductive link comprising a link superconductor and a cryogenic sheath surrounding said link superconductor, each of the two ends of said link superconductor being connected to a respective one of said shields by connection means that are both electrically and thermally conductive. The invention is particularly applicable to high voltage electricity.

The invention relates to a superconductive current limiting based no-arc DC breaker and a breaking method thereof. The breaker comprises a disconnecting switch unit, a superconductive current limiting unit and a no-arc breaking unit in serial connection; the superconductive current limiting unit includes a resistive type superconductive current limiter, and the no-arc breaking unit comprises a mechanical switch, a current converting capacitor and an energy absorbing branch; when a fault occurs, the superconductive current limiting unit quenches superconductivity to limit a short-circuit current, and a rising voltage at the two ends serves as a control signal for motion of the mechanical switch of the no-arc breaking unit; after that the no-arc breaking unit receives the control signal, the DC is disconnected; and finally, the disconnecting switch unit is disconnected in zero current. According to the invention, the superconductive current limiting unit limits the short-circuit current, the charging speed of a current converting capacitor is reduced, and due to that the voltage of the mechanical switch equals that of the current converting capacitor, the voltage of the mechanical switch is lower than a voltage to maintain an arc in certain stage of the disconnecting process, and the arc cannot be generated and is quenched rapidly; and at the same time, the superconductive current limiting unit inhibits voltage and current oscillation in the capacitor, and prevents generation of overvoltage.

The invention discloses a method for preparing positive and negative pole pieces of lithium ion secondary batteries. The method includes steps: stirring and mixing a first organic solvent, a first organic mixture and superconductivity carbon black to obtain first coating; coating front and back surfaces of a positive battery current collector or a negative battery current collector with the first coating, and drying by a drying oven to obtain a positive composite current collector or a negative composite current collector; coating front and back surfaces of the positive composite current collector with second coating, and drying by the drying oven to obtain positive or negative pole pieces, with positive temperature sensitivity, of the lithium ion secondary batteries. By implementation of the method for preparing the positive and negative pole pieces of the lithium ion secondary batteries, battery overcharge risks are reduced, battery safety is improved, and service lives of the lithium ion secondary batteries are prolonged.

A low-cost and highly-conductive nano-carbon material preparation method comprises: selecting a gaseous or gasifiable carbonaceous feedstock as a carbon source, using carrier gas to carry the feedstock, splitting and generating a nano-carbon material in a plasma generator; using low temperature and high temperature plasma, wherein alternating current multi-electrode combined discharging and direct current multi-electrode combined discharging are combined, a high-voltage small-current mode is applied to alternating current, a low-voltage large-current mode is applied to directly current, and a long-gap-discharge mode is applied; in the plasma generator, high airspeed airflow passing through an arc with the dwell time being short; a reaction product enters a thermally insulated fluidized-bed reactor in which the reaction product stays for 10 seconds to 120 minutes; using a cyclone separator and a filter pocket to collect reactants, so that the carrier gas and partial feed gas that is not cracked can be recycled. If the feed gas needs to be cracked more thoroughly, the feed gas may enter into a second or a third plasma reactor, to obtain the nano-carbon material of low cost, high dispersion, high graphitization and superconductivity.

The invention belongs to the technical field of electrical power systems, and discloses a cold-insulating high-temperature superconducting cable superconductivity losing detecting circuit and a detecting method of the cold-insulating high-temperature superconducting cable superconductivity losing detecting circuit. The superconductivity loosing detecting circuit comprises a first current sensor, a second current sensor, a first optical coupling isolation circuit, a second optical coupling isolation circuit, an analog division circuit and a comparison circuit. The first current sensor and the first optical coupling isolation circuit are connected to form a first collecting and isolating circuit. The second current sensor and the second optical coupling isolation circuit are connected to form a second collecting and isolating circuit. The first collecting and isolating circuit and the second collecting and isolating circuit are connected with the analog division circuit and the comparison circuit respectively in sequence. Through the detecting circuit and the detecting method, the superconductivity losing failure of a superconducting cable can be fast detected, and detecting accuracy is high.