206 results about "Yttrium barium copper oxide" patented technology

The present invention relates to an apparatus and method for forming a high-temperature superconducting film on a long tape substrate at speeds suitable for large-scale production. The method includes a spooling system for use in a high-throughput, continuous pulsed laser deposition (PLD) process in which a superconducting layer, such as yttrium-barium-copper-oxide (YBCO), is deposited atop a buffered metal substrate tape that is translated through one or more deposition chambers via the action of a reel-to-reel spooling system and a conductive-radiant multi-zone substrate heater. It also optionally includes a multi-target manipulator apparatus and multiple laser beams in which multiple targets are impinged upon simultaneously.

A renewable electric power system includes a high temperature superconducting wind turbine using high temperature superconducting yttrium-barium-copper oxide for the rotor and stator windings as well as a superconducting bearing. Power from the turbine is stored in a high temperature superconducting magnetic storage system that also uses HTS YBCO. Also included is a regenerative solid oxide fuel cell/electrolyzer with steam turbine cogeneration. The system operates on a managed day/night cycle. During daytime, the energy produced by the wind turbines and fuel cells is transmitted to the grid. During nocturnal hours, the wind turbine is used to provide low cost electricity to the reversible fuel cells operating in the electrolysis mode producing hydrogen and oxygen that is stored for later use. Alternatively, the fuel cells can remain in electrolysis mode producing hydrogen and oxygen for the market. A modified interactive system generates power on a continuous twenty-four hour cycle.

The invention relates to a preparation method of a single domain yttrium barium copper oxide superconductor; and the preparation method comprises the following steps: preparing Y2BaCuO5 precursor powder and liquid phase source powder, pressing a Y2BaCuO5 precursor block, a liquid phase block and a supporting bock, preparing a green body, growing a single domain yttrium barium copper oxide block in an infiltration manner, and carrying out oxygen permeation processing. A second phase nanoparticle Y2Ba4CuBiOx/Y2Ba4CuMOx (M is Bi or W) is successfully introduced for forming a flux pinning center by adopting a top seed crystal infiltration growing method and adding a metallic oxide (Bi2O3 powder and WO3 powder) for doping, thereby the powder preparation technology is simplified, the experimental period is shortened, the experiment cost is reduced, and the flux pinning capacity of the superconductor is increased. Y2O3 is used for preparing the supporting block which stably supports two briquettes above the supporting block in the slow cold growing process of an yttrium barium copper oxide block so as to prevent liquid phase from running off. The preparation method can be used for preparing the yttrium barium copper oxide superconductor and can also be used for preparing high-temperature superconductors of other series such as Gd, Sm, Nd, Eu and the like.

The invention provides a low-magnetism or magnetism-free and high-strength Ni-W alloy composite base band and a preparation method thereof, belonging to the technical field of a high-temperature super-conductive coating conductor texture metal base band. According to the Ni-W alloy composite base band disclosed by the invention, a surface layer is a Ni-W alloy with high W content and the atom percentage content of the W is 7.5-9.3%; and a core layer is a nickel-tungsten alloy with the tungsten atom percentage content of 9.3-12%. The preparation method comprises the following steps of sequentially placing a high-W-content Ni-W alloy blank ingot (A) which is prepared by a smelting method and has the atom percentage content of the W of 7.5-9.3%, and Ni-W mixed powder (B) with the atom percentage content of the W of 9.3-12% into a mould according to the sequence of A-B-A; utilizing a discharge plasma sintering technology to sinter to obtain a composite blank ingot; then, carrying out hot rolling and carrying out cold rolling treatment on a hot rolling blank ingot; and then, crystallizing and annealing, carrying out cold rolling to obtain the composite base band, and re-crystallizing and annealing the base band under the protection of Ar/H2 mixed gas to obtain the Ni-W alloy composite base band. The composite base band has the advantages of high strength, low magnetism or no magnetism and strong cubic structure, and can further meet the requirement of further improving the performance of an YBCO (Yttrium Barium Copper Oxide) coating conductor.

The invention provides a high temperature superconducting magnetic system protected by high heat capacity materials, wherein, a high temperature superconducting magnet (12) is arranged in a low temperature container (6); the periphery of the high temperature superconducting magnet (12) is coated with high heat capacity cold accumulation materials (17); a refrigerator (1) is installed in a vacuum container (2), and a primary cold head of the refrigerator (1) is connected with a cold shield (5) of the vacuum container (2) through a first heat pipe (3); a secondary cold head of the refrigerator (1) is connected with a low temperature container (6) through a second heat pipe (8); a first and a second cold conduction copper rods (23, 24) which are at the lower end of the second heat pipe (8) are connected with the high temperature superconducting magnet (12) through a cold conduction plate (15); a Y-Ba-Cu-O high temperature superconducting block (13) which is installed in external symmetry on the low temperature container (6) interacts with a permanent magnetic block (14) which is on the inner wall of the vacuum container (2), thus suspending the low temperature container (6); and the temperature signal of the high temperature superconducting magnet (12) detected by a temperature probe (18) is used for controlling the startup and shutdown of the refrigerator (1).

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 discloses a method for preparing a yttrium barium copper oxide superconducting film with high critical current density, which comprises the following concrete steps: a, preparing a precursor solution, which is to dissolve yttrium acetate, barium acetate, copper acetate and acetate of an impurity element into propionic acid according to the proportion that the stoichiometric ratio of yttrium: barium: copper: impurity element is 1: 2: 3-X: X (the X is more than or equal to 0.0002 and less than or equal to 0.008) to obtain the precursor solution, and the impurity element is one of Co, Fe, Zn, Ni, and Li; b, adding a polymer material polyvinyl butyral (PVB) into the precursor solution obtained in a step to obtain a coating colloid; c, coating and drying the coating colloid on a substrate to form a film; and d, performing thermal decomposition treatment on the substrate with the film prepared in c step and then imaging thermal treatment to obtain the YBCO superconducting film. The yttrium barium copper oxide superconducting film prepared by the method has high biaxial texture, smooth and compact surface, high critical current density under a magnetic field, low cost, and simple process, and is suitable for mass industrial production.

The invention relates to a method for producing a single domain yttrium barium copper oxide superconduction block. A top-seeded infiltration growing method is adopted to change the ingredients of the solid source powder which is used by the solid block, so that the whole infiltration growing process only needs two precursor powders of YBa2Cu3O7-delta and BaCuO2, the time for preparing the precursor powders is greatly shortened, experimental links are simplified, the experimental period is shortened, the experimental cost is lowered, and the efficiency is increased; and moreover, the single domain yttrium barium copper oxide superconduction block which is prepared by the method has large magnetic suspension buoyancy force, an assembly method that the size of a liquid block is slightly larger than or equals to the size of a solid block is adopted, and the liquid loss, sample collapse, full contact of the solid phase and the liquid phase, crystal growth and oriented growth are benefited.

The invention provides a measurement method of critical current properties of a high-temperature superconducting tape. The measurement method comprises the following steps: a vacuum unit is firstly utilized to carry out vacuum pumping of a low-temperature dewar through a decompression and cooling system, the test temperature range of the superconducting tape with 64K-77K is obtained, a certain DC current is introduced to a coil of a background magnetic field magnet through a current lead wire after reaching the expected temperature, the magnetic induction intensity of air gap can be obtained according to a calibration value, then a rotary handle above the outside of a dewar cover is rotated degree-by-degree at a certain temperature and a certain background magnetic field to drive a sample rack to rotate within the range of 0-90 degrees, the four-probe method is adopted under the different rotation angles, a system control, data acquisition and processing system is utilized to measure the critical current properties of the high-temperature superconducting tape, and a data file is further formed for output. The measurement method can simply and rapidly calculate the temperature, the background magnetic field and the impact factors on the change of the direction of the magnetic field thereof, thereby being applicable to the measurement of the critical current properties of the yttrium barium copper oxide YBCO high-temperature superconducting tape.

This invention discloses sol-gel preparation method of yttrium barium copper oxygen superconducting film. The materials are acetic yttrium, acetic barium, acetic copper, their mol ratio is that acetic yttrium 1 part, acetic barium 2 parts, acetic copper 3-4 parts, trifluoroacetic acid 4-10 parts, water 20-160 parts, acrylic acid 6-40, diethylene triamine 1-5, methanol 60-240, benzoyl acetone 1-10. Fluorine content of the sol is low, components are easy to adjust, chemical stability is good, and preparation process is simple. High temperature superconductive film made by this sol is easy to get superconductive thickness film, its technique repeatability is high, this method can be used to make large area yttrium barium copper oxygen film, the film porosity is low, surface purify is good, and good superconducting characteristic.

The invention discloses a method for preparing yttrium barium copper oxide fluorine-free sol and a high-temperature superconductive membrane. The mol ratio of the following compositions of the fluorine-free sol, namely yttrium acetate to barium acetate or barium hydroxide to copper acetate to diethylenetriamine or ethanolamine or diethanolamine or trolamine to lactic acid to acrylic acid or alpha-methacrylic acid or metacetonic acid to methanol or ethylene glycol monomethyl ether or ethanol, is 1:2:3-4:1.5-5:6-10:6-40:60-360. The method for preparing the superconductive membrane is to adopt different complexing agents to dissolve acetate in a solvent to prepare the yttrium barium copper oxide fluorine-free sol, adopt a crystal pulling method to prepare the fluorine-free sol into a yttrium barium copper oxide gel membrane, perform heat treatment on the gel membrane, and prepare the yttrium barium copper oxide high-temperature superconductive membrane. During preparation of the membrane from the sol, the pyrolysis process is not required; the whole heat treatment time is shortened by approximately 10 hours compared with the prior fluorine-containing technology; and no corrosive HF gas is generated during preparation of the membrane, so that environmental pollution is low.

The invention discloses a method for preparing a single-domain yttrium barium copper oxide bulk superconductor by taking Y2BaCuO5 as a base material. The method comprises the steps of preparing Y2BaCuO5 precursor powder; preparing liquid-phase source powder; pressing a precursor block; assembling the precursor block; infiltrating and growing a single-domain yttrium barium copper oxide bulk; carrying out oxygen infiltration treatment. BaCuO2 precursor powder is replaced with initial powder of BaO and CuO, so that only the Y2BaCuO5 precursor powder is needed in the whole infiltrating and growing processes, experimental links are simplified, experimental periods are shortened, and the preparation efficiency is increased. A supporting block pressed by using the Y2BaCuO5 precursor powder can be used for stably supporting two blanks on the supporting block in the slowly-cooled growing process of the yttrium barium copper oxide bulk, avoiding liquid-phase loss and avoiding the condition that the initial ratio of liquid-phase source bulks is changed because part of liquid is absorbed by the supporting block, so that the integral growth and superconductivity of the bulk are ensured. The method can be used for preparing the yttrium barium copper oxide bulk superconductor and other series of bulk high temperature superconductors such as Gd, Sm, Nd and the like.

This invention discloses a preparation method for micrograph of YBCO high temperature and superconductive films, which utilizes YBCO gel with sensitive property and applies a micro-process method combining a chemical modification method and a Sol-Gel method to prepare the graph period reaching to the mum level.

A superconductor coating inclusive, tape-like electrical conductor and windings using such conductor for magnets and electrical machines, etc. The described windings are suited for inclusion of successor superconductor materials such as yttrium barium copper oxide wherein magnetic flux related losses can potentially be excessive and preclude successful machine operation. Winding orientation and configuration of the conductor in an alternating current machine for lower losses are disclosed along with methods and apparatus for achieving the desired windings. Windings intended for differing locations within a machine of this type are made possible by the invention. Equations relating to magnetic losses incurred in such windings are also disclosed.

The invention discloses an yttrium barium copper oxide superconducting thin film mixed with samarium. Chemical composition of the superconducting thin film is YSmxBa2-xCu3Oy, wherein 0

The invention discloses a method for preparing a specific mixed-orientation YBCO (Yttrium Barium Copper Oxide) high-temperature superconducting thick film. The method comprises the following steps: 1) preparing Ba-Cu-O-phase precursor powder; 2) adding the Ba-Cu-O precursor powder in a Y2O3 crucible in a crystal growing furnace; heating to the first temperature for heat preservation, and obtaining a Y-Ba-Cu-O solution; 3) adding the Ba-Cu-O-phase precursor powder in the high-temperature solution, and preserving heat; 4) cooling the solution to the second temperature at a first cooling speed; and 5) inserting a seed crystal material fixed at a connecting rod into the solution obtained in the step 4) for liquid phase epitaxial growth to obtain the specific mixed-orientation YBCO high-temperature superconducting thick film. As the Ba-Cu-O powder is added again at the high-temperature period, the Y-Ba-Cu-O solution achieves a state of lower degree of supersaturation in a metastable region to grow the YBCO liquid-phase epitaxial film with consistent orientation and a mixed grain boundary structure. The process is simple, and the operation is convenient.

The invention relates to low-cost base metal oxide thick film resistor slurry which is formed by uniformly mixing a conductive phase (a YBCO series material), an inorganic cementing phase (glass powder or Bi oxide powder or Pb oxide powder) and an organic binder. The glass powder in the inorganic cementing phase is SiO2-Bi2O3-Na2O-CaO-Al2O3 series glass, and the glass powder comprises the following raw materials in percentage by weight: 20-80 percent of SiO2, 10-90 percent of Bi2O3, 5-20 percent of Na2O, 5-30 percent of CaO and 1-15 percent of Al2O3; the organic binder comprises the following components in percentage by weight: 20-98 percent of tributyl citrate, 1-30 percent of terpineol, 1-10 percent of pyroxylin, 0.1-6 percent of lecithin and 0.1-6 percent of bentonite. The proportion by weight of the conductive phase YBCO and the inorganic cementing phase (glass powder or Bi2O3 or PbO powder) can be adjusted according to required resistors and resistance temperature coefficients, and the range of the proportion by weight is 40-85: 60-15. The thick film resistor slurry can be burnt into a thick film resistor in the air atmosphere at the temperature of 500-1000 DEG C, the resistance can be adjusted within the range of 25-1000K(omega/port), the resistance value is stable, and the thick film resistor has lower cost than a traditional noble metal thick film resistor.

The invention provides a method for the production of a superconducting electrical conductor. The method involves applying an yttrium-barium-copper oxide (YBCO) layer on a textured metallic substrate as superconductive material, and performing thermal treatment. To produce a wire conductor, a slot tube (3) is formed from the textured metallic substrate longitudinally around an elongated metallic carrier (1) with a circular transverse cross-section where the textured metallic substrate is provided as a band (2). The slot tube has edges extending longitudinally and adjacent with each other at the slot part (4).The slot tube (3) is closed by welding the slot (4), and a closed tube (9) is dragged up to adhere to the carrier (1). An yttrium-barium-copper oxide layer is applied around the tube and finally a heat treatment is accomplished.

The invention discloses a copper-based self-lubricating composite material and a preparation method of the copper-based self-lubricating composite material, and belongs to the technical field of material processing and powder metallurgy. The composite material comprises the following components in percentage by weight: 2 to 4% of yttrium barium copper oxide (YBa2Cu3O7-x), and the balance of copper and inevitable impurities, wherein the yttrium barium copper oxide (YBa2Cu3O7-x) is a good solid lubricant and has the characteristics of superconductivity, thermal stability, friction reducing performance and wear resistance. According to the copper-based self-lubricating composite material and the preparation method, the YBa2Cu3O7-x powder with granularity of 20 to 500 nanometers and the copper powder screened by a sieve of 500 meshes are preferred; the raw materials are mixed and initially pressed, and then processed by the technical means combining processes of sectional heating, sectional pressurizing, sectional cooling and pressurizing, and therefore, the density of the structure of the composite material is improved, the defects such as air holes and cracks are prevented in the composite material; and the prepared composite material is excellent in physical properties, mechanical properties and frictional wear performance.

The invention discloses a preparation method of nano composite ytrium barium copper oxide superconducting bulks, which comprises the steps of preparing solid phase powder, preparing liquid phase source powder, pressing precursor bulks, assembling the precursor bulks, carrying out infiltrated growth on nano composite ytrium barium copper oxide single-domain bulks, and carrying out oxygen permeation treatment. By taking a mixture of Y2O3 nano powder, BaCuO2 precursor powder and CeO2 initial powder as solid phase powder, after high-temperature infiltration and slowly-cooled growth are performed, nanoscale Y2BaCuO5 particles are successfully introduced into ytrium barium copper oxide superconducting bulks, so that higher superconducing properties are obtained. By taking a mixture of Yb2O3, and BaO, CuO initial powder as liquid phase source powder, the whole infiltrated growth process is implemented by only using BaCuO2 precursor powder, so that the method is simple in process and high in efficiency. The invention also can be used for preparing nano composite superconducting materials of Nd, Sm and Gd series and the like.