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32 results about "Superconducting critical temperature" patented technology
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Conventional superconductors usually have critical temperatures ranging from less than 1K to around 20 K. Unconventional superconductors such as cuprate superconductors (e.g. 4Ba2 Cu307) have much higher critical temperature. 4Ba2Cu307 has a critical temperature of 92K.
Preparation method of graphene yttrium niobium copper superconducting material
InactiveCN106898432ACombine tightly and evenlyLower activation energySuperconductors/hyperconductorsApparatus for heat treatmentYttriumMaterials science
The invention discloses a preparation method of a graphene yttrium niobium copper superconducting material. Yttrium powder is added to a graphene oxide solution to be coated with monolayer grapheme. The graphene is agglomerated after thermal treatment and the yttrium powder can be tightly and uniformly combined. The prepared grapheme-coated yttrium powder has a graphene interface. The preparation method also uses a characteristic that the niobium powder absorb gases, generates hydrogen-containing niobium powder and a micro niobium hydrogen compound by means of the powder physical and chemical effect of the hydrogen and the niobium powder so as to achieve a purpose of refining the niobium powder, greatly reduce the activation energy in the reaction, and reduce synthesis difficulty. The product prepared by the method is simple in process, structured in appearance, dense in surface, good in connectivity, and high in superconducting critical temperature.
Owner:SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD
Refrigerator cooling-type superconducting magnet
InactiveCN102460610ASuppress feverCooling temperature riseSuperconductor detailsSuperconducting magnets/coilsCouplingSuperconducting Coils
The attenuation of a magnetic field during a permanent current mode operation is prevented, the generation of heat at a coupling portion between a permanent current switch and a superconducting coil is suppressed, and the increase of a superconducting coil cooling temperature in a current supply mode is minimized. A refrigerator cooling-type superconducting magnet (J) is comprised of a superconducting coil (2); a permanent current switch (1) which switches from a permanent current mode to a current supply mode; first and second extremely-low temperature refrigerators (3, 4) which cool the superconducting coil (2) and the permanent current switch (1), respectively; and a vacuum container (10) which stores cooling stages (31, 32, 41, 42) for the superconducting coil (2), the permanent current switch (1), and the first and second extremely-low temperature refrigerators (3, 4). The refrigerator cooling-type superconducting magnet (J) is comprised of a superconducting wire (5) for couplingthe superconducting coil (2) to the permanent current switch (1), and a superconducting bypass wire (6) electrically connected in parallel to the superconducting wire (5) in the longitudinal direction. The superconducting critical temperature of the superconducting bypass wire (6) is higher than the superconducting critical temperature of the permanent current switch (1).
Owner:HITACHI LTD
Circular section composite superconducting line based on rare-earth barium-copper-oxide (ReBCO) coating superconductor and niobium-titanium (NbTi) low temperature superconductor
ActiveCN102779580AHigh superconducting filling rateImprove engineering current densitySuperconductors/hyperconductorsSuperconductor devicesElectrical conductorNiobium
The invention relates to a circular section composite superconducting line based on a rare-earth barium-copper-oxide (ReBCO) coated superconductor and a niobium-titanium (NbTi) low temperature superconductor and belongs to the field of superconducting materials. An NbTi low temperature superconducting line with a circular section is coated by the ReBCO coating superconductor, and an Ag welding flux is used for welding a high temperature superconducting coating conductor in a high temperature superconducting coating conductor rolling joint to form a weld joint. According to the circular section composite superconducting line, the ReBCO coating superconductor and the NbTi low temperature superconducting line with the circular section are composited, the characteristics that n value of a ReBCO high temperature superconducting material is far lower than that of a low temperature superconducting material NbTi and superconducting stagnation temperature is high are utilized, so that the engineering current density, the shunting temperature and minimum quench energy are improved, whole voltage of low / high temperature superconducting composite superconducting line is prevented from increasing, temperature rising of the composite superconducting line is lowered, and compared with traditional low temperature and high temperature superconducting magnets, a superconducting magnet is stable in operation, high in efficiency, safe, and applied to a high magnetic field magnetic resonance imaging (MRI) magnet and a nuclear magnetic resonance (NMR) magnet.
Owner:中天集团上海超导技术有限公司 +1
High temperature superconducting runway coil array type undulator
InactiveCN102930916AHigh superconducting critical temperatureIncrease operating temperatureRadiation/particle handlingSuperconducting magnets/coilsCoil arrayFree electron laser device
The invention relates to a high temperature superconducting runway coil array type undulator. The undulator comprises two rows of high temperature superconducting coil arrays which are longitudinally spaced and arranged in parallel; each row of high temperature superconducting coil array comprises n groups of magnetic pole coil assemblies which are axially arranged, and each group of magnetic pole coil assembly comprises a pair of magnetic poles and coils arranged between the pair of magnetic poles, wherein n is a natural number; the undulator also comprises a direct-current power supply which is used for supplying power to the coils; and the electric current direction of the direct-current power supply is set in a manner of ensuring magnetic induction intensity generated by the two adjacent coils to be identical in size and opposite in direction. The undulator has relatively high superconducting critical temperature through the adoption of a high temperature superconducting material so that the running temperature of the undulator is high, thereby the refrigeration cost is effectively reduced, and simultaneously the magnetic induction intensity is increased; and in addition, as the size of a magnetic field generated by the undulator can be adjusted by adjusting the magnitude of energizing currents of the coils, the undulator is very convenient to adjust. The high temperature superconducting runway coil array type undulator is suitable for a synchronous radiation device and a free electron laser device.
Owner:SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
Undulator
InactiveCN103337332ARandom combinationImprove performanceRadiation/particle handlingSuperconducting magnets/coilsRare earthMagnetic poles
The invention discloses an undulator which comprises a plurality of permanent magnet groups arranged sequentially, wherein each permanent magnet group comprises two groups of superconductive permanent magnets and two groups of rare-earth permanent magnets; the superconductive permanent magnets and the rare-earth permanent magnets are arranged on the two sides of a transmission path of an electron beam respectively; magnetic poles of the superconductive permanent magnets are opposite in direction; magnetic fields generated by the rare-earth permanent magnets strengthen magnetic fields generated by the superconductive permanent magnets on the transmission path of the electron beam; the temperature of the superconductive permanent magnets is lower than the superconductive critical temperature of the superconductive permanent magnets; and the magnetic induction intensity of magnetic fields generated by the permanent magnet groups on the transmission path of the electron beam has periodic variation in a direction of the transmission path of the electron beam. According to the undulator, a magnetic field with higher magnetic induction intensity is generated by the superconductive permanent magnets and the rare-earth permanent magnets in a magnetic field superposition manner, so that the performance of the undulator is improved.
Owner:SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
Nb nanobelt/martensitic NiTi memory alloy matrix composite filament and production method thereof
The invention provides Nb nanobelt / martensitic NiTi memory alloy matrix composite filament and a production method thereof. The Nb nanobelt / martensitic NiTi memory alloy matrix composite filament comprises the following components: 7-15% (atomic percent) of Nb, Ti and Ni with the atom ratio of (0.8-1.2):1, wherein the sum of atomic percents of Ti, Ni and Nb is 100%. The Nb nanobelt / martensitic NiTi memory alloy matrix composite filament is prepared by carrying out the following steps: selecting simple substances nickel, titanium and niobium with purity of more than 99wt%; smelting and casting, so that ingot casting is obtained; homogenizing and annealing the ingot casting; and then carrying out hot forging and moulding; carrying out plastic processing, annealing treatment, at least once uniaxial drawing-loading-unloading circular deformation treatment on a profile subjected to hot forging, wherein deformation is 1-9%, so that the Nb nanobelt / martensitic NiTi memory alloy matrix composite filament is obtained. The Nb nanobelt / martensitic NiTi memory alloy matrix composite filament can reserve great tensile elastic strain of Nb nanobelt in a free-state composite material, superconduction critical temperature of the free-state composite material is increased, and a magnetic field of the free-state composite material is enhanced.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
SQUID chip and detection method thereof
ActiveCN105093093AImprove stabilityReduce in quantityElectronic circuit testingElectrical resistance and conductanceWorking temperature
The invention provides a superconducting quantum interference device (SQUID) chip comprising an SQUID device, a feedback coil, and a heater. The feedback coil and the heater are connected in parallel. When the feedback coil works in a superconducting state, the heater does not work and the SQUID device detects a magnetic flow signal and converts the signal into a voltage signal for outputting. When the feedback coil works in a quenching state, the heater starts to carry out heating so that the working temperature of the SQUID device rises; and when the temperature of the SQUID device exceeds a superconducting critical temperature, the SQUID device is in a quenching state. The SQUID chip and a sensing circuit are connected to form an SQUID magnetic sensor. According to the invention, the heating resistor and feedback coil in the traditional SQUID chip are connected in parallel; and with parameter matching, the heating resistor and the feedback coil works in a cooperation mode, thereby realizing dual-function operation. The metal lead number of the normal-temperature circuit and the low-temperature circuit is reduced so that the low-temperature losses can be substantially reduced and the cost is saved; the low-temperature environment keeping time is improved; and the system operation time is increased. The SQUID chip has the great economical and application value.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Self-vacuum heat insulation pump used for conveying low-temperature liquid
PendingCN111140510AGuaranteed uptimeAxial heat transfer reductionSpecific fluid pumpsPump componentsElectric machineSuperconducting electric machine
The invention provides a self-vacuum heat insulation pump used for conveying low-temperature liquid. The self-vacuum heat insulation pump comprises a shell, a self-vacuum heat insulation shell, a bearing located in the shell, a main shaft supported on the bearing, a motor installed on the main shaft and an impeller installed at the end of the main shaft, wherein the heat insulation shell is weldedto the outer side of the shell to form a self-vacuum structure, the bearing comprises a front bearing body and a rear bearing body, the front bearing body and the rear bearing body are both providedwith a through hole, the main shaft is supported on the front bearing body and the rear bearing body, the motor comprises a superconducting excitation pole rotor and a superconducting armature windingstator, and the impeller is installed at the end, close to an inlet of the low-temperature liquid, of the main shaft. Temperature difference does not exist between the bearing and the impeller, in this way, the axial heat conduction amount of a centrifugal pump is greatly reduced, and thus the loss of cooling capacity is small. In the meanwhile, the bearing can reliably work for a long term, andthe working temperature of the superconducting motor is kept below the superconducting critical temperature. The self-vacuum heat insulation pump used for conveying the low-temperature liquid can be widely applied to the field of conveying of the low-temperature liquid.
Owner:XI AN JIAOTONG UNIV +1
Method for preparing nanocarbon conductive fiber yttrium-niobium-aluminum superconducting material
InactiveCN107464628ACombine tightly and evenlyImprove conductivitySuperconductors/hyperconductorsApparatus for heat treatmentFiberNiobium
The invention discloses a method for preparing a nanocarbon conductive fiber yttrium-niobium-aluminum superconducting material. The method is characterized in that yttrium powder is added into a nanocarbon conductive fiber material solution to coat nanocarbon conductive fibers with yttrium powder, clustering is prevented after heat treatment, close and uniform combination with yttrium powder can be realized, the conductivity is improved, and the obtained product is high in critical transition temperature and favorable in superconducting property. According to the method, by use of the gas absorption characteristic of niobium powder, firstly, through the physical and chemical functions between hydrogen and niobium powder, a niobium powder and trace niobium hydrogen compound containing hydrogen is generated, the purpose of refining niobium powder is achieved, activation energy in the reaction is greatly reduced, and the synthetic difficulty is reduced. The prepared nanocarbon conductive fiber yttrium-niobium-aluminum superconducting material is simple in process, regular in shape and appearance, compact in surface, excellent in connection performance and high in superconducting critical temperature.
Owner:SUZHOU NANER MATERIAL TECH CO LTD
Gadolinium thorium oxygen iron arsenic high-temperature superconducting material and preparation thereof
InactiveCN101274845AImprove superconductivityIncreased superconducting critical temperatureSuperconductors/hyperconductorsSuperconductor devicesOxygenChemistry
The invention relates to a high temperature superconducting material of gadolinium, thorium, oxygen, iron and arsenic, pertains to a ZrCuSiAs-type structure and has the same crystal structure as LaO1-yFyFeAs. The general formula of the high temperature superconducting material of gadolinium, thorium, oxygen, iron and arsenic of the invention is Gd1-xThx OFeAs, wherein, x is more than or equal to 0.05 and less than or equal to 0.30; the mole ratio of all elements content in the high temperature superconducting material gadolinium, thorium, oxygen, iron and arsenic is that Gd:Th: O: Fe: As is equal to 0.70 to 0.95: 0.3 to 0.05:1: 1: 1. According to the content of every element, the raw materials are mixed, ground, preformed, calcinated and quickly cooled, etc. so as to obtain a superconducting polycrystalline block. The high temperature superconducting material of gadolinium, thorium, oxygen, iron and arsenic of the invention has max superconducting critical temperature Tc which reaches 56.5 K, estimated upper critical field Bc2 exceeding 100 Tesla, is superior to the LaO1-yFyFeAs superconductor with similar structure and has obvious advantages in practical use.
Owner:ZHEJIANG UNIV
Method for manufacturing high-temperature superconducting material based on phonon physical attribute and high-temperature superconducting material manufactured by method
InactiveCN102314971ASuperconductors/hyperconductorsSuperconductor devicesHigh-temperature superconductivityExcited state
The invention emphasizes the time variation of an electron-lattice system, points out a mistake that quantization is used as a premise in a time variation place, proposes a new point that a phonon is defined as a neutretto for electromagnetic interaction between an electron and a lattice wave, and researches behaviors, relevant to 'measured' energy, of the electron-lattice system. By the invention, a nonstationary steady state of the electron subjected to electron pairing through virtual stimulated transition is confirmed, some sources (corresponding to high-temperature or low-temperature superconducting) of combined energy of electron pairs in a crystal are confirmed, and a state of electrons during pairing is explained. The behavior and the action of a threshold value phonon released by a simulated electron during electron pairing are confirmed, and redundancy of the threshold value phonon is affirmed when the electrons during pairing enter the nonstationary steady state. The evolution of the stability of the lattice wave on a transition probability function and the influence of the electrons on the stability are researched, and competition among a plurality of pairs relevant to the same electronic state and whether the competition has decision action on a superconducting phase are discussed. The invention provides a superconducting material with optimized superconducting critical temperature and a preparation method for the superconducting material.
Owner:田多贤
Preparation method of rare earth barium copper oxygen high-temperature superconducting film
The invention discloses a preparation method of a rare earth barium copper oxygen high-temperature superconducting film. The preparation method comprises the following steps: a) weighing rare earth metal salt, barium salt, copper salt and a doping element compound according to a ratio, and dispersing the earth metal salt, the barium salt, the copper salt and the doping element compound into a solvent to obtain a precursor, wherein the doping element compound can generate doping element oxide at 300 to 650 DEG C and under the oxygen atmosphere; b) coating the precursor on a substrate to form a precursor film; c) placing the precursor film into a heat treatment furnace, introducing oxygen, heating the furnace to 300 to 650 DEG C, preserving heat for 0 to 5 hours, and introducing water vapor when the furnace temperature reaches 80 to 120 DEG C until thermal decomposition is finished; d) introducing oxygen nitrogen mixed gas and water vapor, heating the furnace to 700 to 825 DEC C, preserving heat for 20 to 250 DEG C, and stopping introducing the water vapor at the last 1 to 30 percent of time of heat preservation; and e) cooling the furnace to 400 to 500 DEG C and preserving heat for 0 to 240 minutes to obtain a product. According to the rare earth barium copper oxygen high-temperature superconducting film obtained by the preparation method, the thickness is more than 300 nm, the superconduction critical temperature is more than 90 K, and the critical current density at the temperature of 77 K and under the self-field condition is more than 1 mA / cm<2>.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV +1
Superconducting nanowire single photon detector and method of obtaining such detector
PendingCN112531101AEasy to packImprove applicabilitySuperconductor detailsNanoopticsNanowirePhoton detection
The present invention relates to a superconducting nanowire single photon detector comprising a superconducting nanowire configured and arranged for incidence of photons on a region of the superconducting nanowire and for forming a local non-superconducting region or hot spot on the region. The superconducting nanowire is made of a high Tc cuprate superconductor material having a superconducting critical temperature above 77K. The invention also relates to a method of obtaining a superconducting nanowire single photon detector of the invention.
Owner:FUNDACIO INST DE CIENCIES FOT NIQUES
Magnesium diboride superconductive undulator
ActiveCN102945722AIncrease operating temperatureImproved accuracy of magnetic field period lengthRadiation/particle handlingSuperconducting magnets/coilsCoil arrayPower flow
The invention relates to a magnesium diboride superconductive undulator which comprises two lists of superconductive coil arrays which are vertically arranged at intervals in parallel. Each list of the superconductive coil arrays comprise a high conductive coil framework, 2n+1 magnetic conductive baffles which are arranged axially at intervals in parallel and surround the surface of the high conductive coil framework and 2n magnesium diboride superconductive coil windings wound on the surface of the high conductive coil framework and located between every two adjacent conductive baffles, wherein n is a natural number. The undulator further comprises a direct current power supply supplying power to the magnesium diboride superconductive coil windings. The current direction of the direct current power supply is arranged to enable magnetic induction strength generated by two adjacent magnesium diboride superconductive coil windings to be identical in magnitude and opposite in direction. The undulator adopts magnesium diboride superconductive materials, the superconductive critical temperature is higher, running temperature is higher, and refrigerating cost is reduced effectively. Simultaneously, the undulator adopts the integral type coil framework and improves cycle length accuracy of the magnetic field of the undulator.
Owner:SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
Preparation method of yttrium-niobium-copper superconducting material
The invention discloses a preparation method of an yttrium-niobium-copper superconducting material. According to the preparation method, niobium powder is added to a nano-carbon conductive fiber material solution, so that coating of the niobium powder with a nano-carbon conductive fiber is achieved, agglomeration is avoided after thermal treatment, the niobium powder can be tightly and uniformly combined, the yttrium-niobium-copper superconducting material has improved conductivity, the obtained product is high in critical transition temperature and good in superconducting property, and the prepared product is simple in process, regular in shape and form, dense in surface, good in connectivity and high in superconducting critical temperature.
Owner:SUZHOU NANER MATERIAL TECH CO LTD
Device for cooling superconducting cable
ActiveCN110853833AAchieve superconducting operationLow freezing pointSuperconductors/hyperconductorsDomestic cooling apparatusSuperconducting critical temperatureElectric cables
The invention provides a device for cooling a superconducting cable. The device comprises a superconducting energy pipeline, a base station cooler, a heat exchanger, an LNG immersed pump and a modulation device. A part of LNG in the superconducting energy pipeline is conveyed into the base station cooler to directly exchange heat with a power transmission terminal, so that the temperature of the power transmission terminal is maintained below the superconducting critical temperature; the temperature of the LNG subjected to heat exchange with the power transmission terminal rises to generate agas-liquid two-phase flow, and the gas-liquid two-phase flow enters the modulation device to be modulated into liquid and then, enters the LNG immersed pump; the LNG immersed pump conveys LNG to the heat exchanger for heat exchange; the heat exchanger reduces the temperature of the modulated LNG to be lower than the superconducting critical temperature; and then, the cooled LNG enters another power transmission terminal in the base station cooler for heat exchange; and the heat-exchanged LNG enters the superconducting energy pipeline, and the freezing point is reduced. According to the devicefor cooling the superconducting cable, LNG cold energy is fully utilized to make the temperature of the power transmission terminal maintained under the superconducting critical temperature, so that superconducting operation of the power transmission terminal is achieved.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +4
High temperature superconducting material, and preparation method thereof
InactiveCN109180176AHigh superconducting critical currentThe critical magnetic field is largeCritical magnetic fieldMaterials science
The invention discloses a high temperature superconducting material, and a preparation method thereof. the general chemical formula of the high temperature superconducting material is Ti<z>-(Cu<0.5>Ti<0.5>)Ba<2>(Ca<2-x>Ti<x>)CuO<10-y>, wherein x ranges from 0.25 to 1.0, y ranges from 1.0 to 9.0, and z ranges from 2 to 8. The high temperature superconducting material is high in superconductive critical temperature, critical magnetic field intensity, and superconductive critical current intensity. The preparation method is simple; the adopted raw materials are cheap; quartz mortar is taken as anintermedium, full uniforming is adopted, and two times of high temperature baking are adopted, so that sample dispersibility is improved, and powder with a uniform particle size is obtained; pressinginto sheet materials is carried out using a tablet pressing machine so as to obtain the high temperature superconducting material; an additive is added into quartz mortar, so that the viscosity of the quartz mortar is reduced, and more uniform mixing of the high temperature superconducting material is achieved; at the same time, quartz mortar is capable of realizing more comprehensive contact ofBa(NO3)2, Ca(NO3)2, TiO2, and Cu(CN); the quartz mortar is subjected to baking in a tubular furnace at oxygen atmosphere at 800 to 900 DEG C, the quartz mortar is taken as a combustion improver, and combustion reaction of Ba(NO3)2, Ca(NO3)2, TiO2, and Cu(CN) is accelerated.
Owner:广州铮讯信息科技有限公司 +1
Method for preparing Y-Nb-Cu superconducting material through high-temperature sintering method
InactiveCN106782897AHigh superconducting critical temperatureReduce the difficulty of synthesisSuperconductors/hyperconductorsApparatus for heat treatmentHydrogenChemical reaction
The invention discloses a method for preparing a Y-Nb-Cu superconducting material through a high-temperature sintering method. According to the method for preparing the Y-Nb-Cu superconducting material, disclosed by the invention, the characteristic of absorbing a gas by Nb powder is utilized, an Nb powder and trace Nb hydrogen compound containing hydrogen is generated at first through physical and chemical reaction of the hydrogen and the Nb powder, so that the purpose of refining the Nb powder is achieved, activation energy in reaction is reduced to a large extent, and the synthesis difficulty is reduced; a product prepared by the invention is simple in technology, regular in morphology, dense in surface, good in connection performance and high in superconduction critical temperature.
Owner:SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD
Potassium-doped phenanthrene molecular crystal and preparation method thereof
InactiveCN104651941BIncrease the c-axis lengthImprove the superconducting scorePolycrystalline material growthOrganic chemistryPhenanthrenePotassium hydride
The invention provides a potassium-doped phenanthrene molecular crystal and a preparation method thereof. In the first aspect, the preparation method comprises the following steps: annealing under high-vacuum, anhydrous and anaerobic conditions, and controlling the annealing temperature and cooling rate to ensure that potassium atoms can be effectively doped into phenanthrene molecular crystal layers and among the phenanthrene molecular crystal layers, the c-axis length of a phenanthrene molecular crystal can be increased, and a high-quality crystal material with very good [001] oriented growth can be obtained; in the second aspect, the production of impurities such as potassium hydride can be effectively inhibited by controlling the annealing temperature and cooling rate, the high-purity potassium-doped phenanthrene molecular crystal can be obtained, and superconducting fractions of materials can be increased; and in the third aspect, the potassium atoms can be synchronously doped into the phenanthrene molecular crystal layers and among the phenanthrene molecular crystal layers so as to ensure that phenanthrene can be transformed into a stable metal state from a semiconductor state, and the superconduction critical temperature can be increased.
Owner:HUBEI UNIV
Chlorosulfenyl hydride superconducting material and preparation method thereof
ActiveCN114368727AReduce superconducting phase transition pressureEasy to applySuperconductors/hyperconductorsSuperconductor devicesSuperconducting critical temperatureSulfuryl
The invention provides a chlorothio hydride superconducting material and a preparation method thereof. The chemical formula of the superconducting material is ClSH6. The preparation method of the superconducting material comprises the following steps: providing sulfur powder, chlorine and hydrogen; and pressurizing and pressing the sulfur powder, chlorine and hydrogen to metallize the sulfur powder, chlorine and hydrogen to obtain the chlorothio hydride superconducting material. According to the superconducting material, Cl is used for partially replacing S to reduce the superconducting phase change pressure intensity of SH3, the superconducting material is a superconducting material system with ternary metal characteristics, and a larger space is provided for selection and application of the superconducting material; specifically, the working pressure of the chlorothio hydride superconducting material is 90 GPa to 200 GPa, the critical superconducting temperature is 83.41 K to 155.41 K, the working pressure and the critical superconducting temperature have wide modulation ranges, and the chlorothio hydride superconducting material can be better suitable for various industry fields.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Magnesium diboride superconductive undulator
ActiveCN102945722BIncrease operating temperatureImproved accuracy of magnetic field period lengthRadiation/particle handlingSuperconducting magnets/coilsCoil arrayMagnesium diboride
The invention relates to a magnesium diboride superconductive undulator which comprises two lists of superconductive coil arrays which are vertically arranged at intervals in parallel. Each list of the superconductive coil arrays comprise a high conductive coil framework, 2n+1 magnetic conductive baffles which are arranged axially at intervals in parallel and surround the surface of the high conductive coil framework and 2n magnesium diboride superconductive coil windings wound on the surface of the high conductive coil framework and located between every two adjacent conductive baffles, wherein n is a natural number. The undulator further comprises a direct current power supply supplying power to the magnesium diboride superconductive coil windings. The current direction of the direct current power supply is arranged to enable magnetic induction strength generated by two adjacent magnesium diboride superconductive coil windings to be identical in magnitude and opposite in direction. The undulator adopts magnesium diboride superconductive materials, the superconductive critical temperature is higher, running temperature is higher, and refrigerating cost is reduced effectively. Simultaneously, the undulator adopts the integral type coil framework and improves cycle length accuracy of the magnetic field of the undulator.
Owner:SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
Superconducting nanowire single-photon detector, and a method for obtaining such detector
PendingUS20210083133A1Reduce heating capacityLight is longSuperconductor detailsNanoopticsNanowirePhoton detection
The present invention relates to a superconducting nanowire single-photon detector, which can include a superconducting nanowire configured and arranged for the incidence of a photon on a region thereof and the formation, on that region, of a localized non-superconducting region or hotspot.The superconducting nanowire is made of a high-Tc cuprate superconductor material having a superconducting critical temperature above 77 K.The present invention also relates to a method for obtaining the superconducting nanowire single-photon detector of the present invention.
Owner:FUNDACIO INST DE CIENCIES FOT NIQUES
Preparation method of rare earth barium copper oxygen high-temperature superconducting film
The invention discloses a preparation method of a rare earth barium copper oxygen high-temperature superconducting film. The preparation method comprises the following steps: a) weighing rare earth metal salt, barium salt, copper salt and a doping element compound according to a ratio, and dispersing the earth metal salt, the barium salt, the copper salt and the doping element compound into a solvent to obtain a precursor, wherein the doping element compound can generate doping element oxide at 300 to 650 DEG C and under the oxygen atmosphere; b) coating the precursor on a substrate to form a precursor film; c) placing the precursor film into a heat treatment furnace, introducing oxygen, heating the furnace to 300 to 650 DEG C, preserving heat for 0 to 5 hours, and introducing water vapor when the furnace temperature reaches 80 to 120 DEG C until thermal decomposition is finished; d) introducing oxygen nitrogen mixed gas and water vapor, heating the furnace to 700 to 825 DEC C, preserving heat for 20 to 250 DEG C, and stopping introducing the water vapor at the last 1 to 30 percent of time of heat preservation; and e) cooling the furnace to 400 to 500 DEG C and preserving heat for 0 to 240 minutes to obtain a product. According to the rare earth barium copper oxygen high-temperature superconducting film obtained by the preparation method, the thickness is more than 300 nm, the superconduction critical temperature is more than 90 K, and the critical current density at the temperature of 77 K and under the self-field condition is more than 1 mA / cm<2>.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV +1
Iron-based oxide superconducting material and preparation method thereof
The invention discloses an iron-based oxide superconducting material and a preparation method thereof. The iron-based oxide superconducting material Nb2Ge1Se1Ni3Fe3F2O14 is composed of iron as a basematerial and mixtures composed of niobium, germanium, selenium, nickel, iron, fluorine and oxygen according to a molecular weight group. The mixtures are respectively Nb2O5, GeO2, SeO3, Ni3O2, Fe3O4 compounds and F2 gas, and the proportion combination sequence of the Nb2O5, GeO2, SeO3, Ni3O2 and Fe3O4 compounds is 0.2 : 0.6 : 2 : 2 : 5.2. The critical superconducting temperature of the niobium-germanium (Nb3Ge) alloy reaches 25K, the niobium-germanium (Nb3Ge) alloy doped with iron, nickel and selenium oxides is sintered and ground at high temperature and high pressure, fluorine (F2) is introduced for sintering and grinding at high temperature and high pressure, the superconducting critical temperature (Tc) of the obtained powder material is 57K, and the current iron-based superconductor critical temperature 50K is broken through.
Owner:河北环亚线缆有限公司
Refrigerator cooling-type superconducting magnet
InactiveCN102460610BSuppress feverCooling temperature riseSuperconductor detailsSuperconducting magnets/coilsSuperconducting CoilsSuperconducting critical temperature
Magnetic field attenuation in a persistent current mode operation is prevented, heat generation at a connecting part between the persistent current switch and the superconducting coil, and increase in a cooling temperature of the superconducting coil in a current supplying mode is suppressed to a minimum. The refrigerator cooling-type superconducting magnet J according to the present invention including a superconducting coil (2), a persistent current switch (1) for switch between a persistent current mode and a current supplying mode; a superconducting coil (2), first and second cryogenic refrigerators (3, 4) for respectively cooing the superconducting coil (2) and the persistent current switch (1); a vacuum vessel (10) for housing the super conducting coil (2), the persistent current switch (1), and cooling stages (31, 32, 41, 42) of the first and second cryogenic refrigerators (3, 4), the magnet includes a superconducting wire (5) for connecting the superconducting coil (2) to the persistent current switch (1) and a superconducting bypass line (6) electrically connected in parallel to the superconducting wire along a longitudinal direction, wherein a superconducting critical temperature of the superconducting bypass line (6) is higher than a superconducting critical temperature of the persistent current switch (5).
Owner:HITACHI LTD
nb nanobelt/martensitic niti memory alloy matrix composite wire and its preparation method
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Gadolinium thorium oxygen iron arsenic high-temperature superconducting material and preparation thereof
The invention relates to a high temperature superconducting material of gadolinium, thorium, oxygen, iron and arsenic, pertains to a ZrCuSiAs-type structure and has the same crystal structure as LaO1-yFyFeAs. The general formula of the high temperature superconducting material of gadolinium, thorium, oxygen, iron and arsenic of the invention is Gd1-xThx OFeAs, wherein, x is more than or equal to 0.05 and less than or equal to 0.30; the mole ratio of all elements content in the high temperature superconducting material gadolinium, thorium, oxygen, iron and arsenic is that Gd:Th: O: Fe: As is equal to 0.70 to 0.95: 0.3 to 0.05:1: 1: 1. According to the content of every element, the raw materials are mixed, ground, preformed, calcinated and quickly cooled, etc. so as to obtain a superconducting polycrystalline block. The high temperature superconducting material of gadolinium, thorium, oxygen, iron and arsenic of the invention has max superconducting critical temperature Tc which reaches56.5 K, estimated upper critical field Bc2 exceeding 100 Tesla, is superior to the LaO1-yFyFeAs superconductor with similar structure and has obvious advantages in practical use.
Owner:ZHEJIANG UNIV
High Temperature Superconducting Device
PendingUS20220123194A1Superconductors/hyperconductorsSuperconductor detailsHigh temperature superconductingSuperconducting critical temperature
A superconducting structure is presented. In some embodiments, the superconducting structure includes a first plane of material; a second plane of material; and a separating medium positioned between the first plane and the second plane, wherein a superconducting critical temperature of the superconducting structure is adjusted by control of one or more parameters.
Owner:TRUGENBERGER CARLO A +2
Extremely-weak magnetic field standard device
InactiveCN111025198AEvenly distributedStable distributionMagnetic field offset compensationLow noiseSuperconducting critical temperature
The invention discloses an extremely-weak magnetic field standard device which comprises a three-axis magnetic field coil, a magnetic field noise compensation system, a low-temperature cooling system,a superconducting shielding cylinder and an extremely-weak magnetic field coil. The low-temperature cooling system is arranged in a magnetic field environment constructed by the three-axis magnetic field coil and the magnetic field noise compensation system, the three-axis magnetic field coil compensates a geomagnetic field fixed component, and the magnetic field noise compensation system compensates geomagnetic field noise; the superconducting shielding cylinder is located in the low-temperature cooling system, the low-temperature cooling system reproduces the ultralow-temperature environment, the superconducting shielding cylinder reaches the superconducting critical temperature or below, magnetic field shielding is achieved in the cylinder, and the extremely-weak magnetic field coil islocated in the superconducting shielding cylinder and generates an extremely-weak magnetic field. According to the invention, an ultralow-noise 'zero magnetic space' environment can be provided for the extremely weak magnetic field.
Owner:中国船舶重工集团有限公司第七一0研究所
A device for cooling superconducting cables
ActiveCN110853833BAchieve superconducting operationLow freezing pointSuperconductors/hyperconductorsDomestic cooling apparatusEngineeringSuperconducting critical temperature
The invention provides a device for cooling a superconducting cable. The device comprises a superconducting energy pipeline, a base station cooler, a heat exchanger, an LNG immersed pump and a modulation device. A part of LNG in the superconducting energy pipeline is conveyed into the base station cooler to directly exchange heat with a power transmission terminal, so that the temperature of the power transmission terminal is maintained below the superconducting critical temperature; the temperature of the LNG subjected to heat exchange with the power transmission terminal rises to generate agas-liquid two-phase flow, and the gas-liquid two-phase flow enters the modulation device to be modulated into liquid and then, enters the LNG immersed pump; the LNG immersed pump conveys LNG to the heat exchanger for heat exchange; the heat exchanger reduces the temperature of the modulated LNG to be lower than the superconducting critical temperature; and then, the cooled LNG enters another power transmission terminal in the base station cooler for heat exchange; and the heat-exchanged LNG enters the superconducting energy pipeline, and the freezing point is reduced. According to the devicefor cooling the superconducting cable, LNG cold energy is fully utilized to make the temperature of the power transmission terminal maintained under the superconducting critical temperature, so that superconducting operation of the power transmission terminal is achieved.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +4
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