31 results about "Niobium nitride" patented technology

The invention discloses a sulfur-loaded lamellar niobium oxide / niobium nitride-biomass derived porous carbon composite electrode material as well as a preparation method and application thereof, and belongs to the technical field of preparation methods of lithium-sulfur battery electrode materials, the method comprises the following steps: dispersing biomass derived porous carbon in an ethylene glycol solution dissolved with niobium pentachloride, and sequentially performing hydrothermal reaction to obtain the sulfur-loaded lamellar niobium oxide / niobium nitride-biomass derived porous carbon composite electrode material. The preparation method comprises the following steps: firstly, preparing a porous carbon composite material, calcining the porous carbon composite material, performing calcination reaction on the porous carbon composite material and melamine at the same time, finally mixing the porous carbon composite material with elemental sulfur, and performing heat treatment to obtain the sulfur-loaded lamellar niobium oxide / niobium nitride-biomass derived porous carbon composite electrode material. Lamellar niobium oxide / niobium nitride is utilized to increase polysulfide adsorption and catalytic conversion sites, a built-in electric field generated by constructing a niobium-based heterojunction is utilized to promote the electron transfer rate in the polysulfide conversion process, the electrode reaction kinetics is accelerated, and biomass derived porous carbon is utilized to improve the matrix conductivity and inhibit the shuttle effect of polysulfide, so that the conversion efficiency of the polysulfide is improved. The cycle performance and the service life of the lithium-sulfur battery are synergistically improved.

The application belongs to the technical field of surface engineering protection, and discloses a transition metal compound composite coating, a preparation method and application thereof; wherein the transition metal compound composite coating is a composite multilayer structure, and comprises n same periodic structures deposited in sequence, and n is greater than or equal to 2; wherein each periodic structure comprises a titanium nitride coating and a niobium nitride coating. The application specifically discloses a high-conductivity strong-corrosion-resistance transition metal compound composite coating, and can solve the technical problems of high cost, high corrosion current density, low corrosion overpotential and poor conductivity in the prior art.

This invention discloses a method for controlling the thermal relaxation path of superconducting nanostructures and its application. This method utilizes a van der Waals integration strategy to sequentially fabricate a molybdenum disulfide layer on a silicon / silicon oxide substrate using chemical solution deposition and a niobium nitride superconducting layer using magnetron sputtering, constructing a niobium nitride / molybdenum disulfide heterostructure with intrinsic anisotropic thermal conductivity. Superconducting nanodevices with specific geometric configurations are designed for this heterostructure. Leveraging the ultra-high in-plane thermal conductivity of molybdenum disulfide and its suppressed out-of-plane heat transfer characteristics, the method achieves directional control of the internal thermal relaxation path of the superconducting nanostructure, verifying its dual advantages of optimizing thermal management and enhancing superconducting performance. The control method of this invention is mature and controllable, effectively transforming disordered thermal relaxation into directional heat transfer, significantly improving the thermal stability and integration density of superconducting devices, and providing a core solution for the thermal management of nanocircuits in fields such as superconducting quantum computing and high-sensitivity quantum detection.

The application discloses a superconducting diode device based on a single-layer niobium nitride nanoring and a control method thereof, and belongs to the technical field of superconducting electronics. The superconducting diode device comprises an insulating substrate and a niobium nitride layer. The niobium nitride layer comprises a first working line, a second working line and an intermediate ring. The first working line comprises a first line segment, a second line segment and a first intermediate part. The second working line comprises a third line segment, a fourth line segment and a second intermediate part. The intermediate ring is connected with the first intermediate part and the second intermediate part. The application uses a single-layer niobium nitride film, and realizes a structure of a superconducting diode with a minimum size and a single layer by means of the action of a nanoring with geometric asymmetry and an external magnetic field. The device size is greatly reduced, which is conducive to high-density integration and miniaturization application, and conducive to realizing low-power consumption and high-speed rectification control. The difficulty of material and interface control is greatly reduced. The process flow is simple and has good repeatability, which is conducive to reducing the preparation cost and improving the consistency of the device.

A transparent glazing article, comprising at least one glass substrate equipped, on at least one of its faces, with a coating consisting of a stack of thin layers, the coating comprising the following sequence of layers, with reference to the surface of the substrate: - a first layer comprising niobium nitride, - a layer comprising a transparent conductive oxide, - a second layer comprising niobium nitride, wherein the first and second layers comprising niobium nitride are in direct contact with the layer comprising a transparent conductive oxide.

The present invention relates to a glass transition material for a circulating fluidized bed (CFB) and its preparation and use methods, belonging to the technical field of comprehensive utilization of CFB fly ash. The glass transition material is prepared from 85-100 parts by weight of manganese monoxide, 5-30 parts by weight of niobium nitride, 5-15 parts by weight of polyoxyethylene lauryl ether, and 15-40 parts by weight of water. During preparation, polyoxyethylene lauryl ether and water are first mixed, followed by the addition of manganese monoxide and niobium nitride, and vigorous stirring in a blender. The present invention utilizes polyoxyethylene lauryl ether to uniformly disperse manganese monoxide and niobium nitride in a coal sample. The mineralization effect of manganese monoxide and niobium nitride reduces the liquid phase formation temperature and liquid phase viscosity, increases the liquid phase ratio, and promotes the glass transition of CFB fly ash. Furthermore, nitrogen generated by the high temperature of niobium nitride creates pores, increasing the content of hollow microspheres in the CFB fly ash.

The invention provides alloy stainless steel and an application method thereof in beer barrel voltage divider casting, and the method comprises the following steps: determining that the molar ratio of Nb to C is greater than 8 according to the alloy stainless steel, and fixing carbon and nitrogen elements by forming niobium carbide and niobium nitride; the alloy stainless steel is adopted for preparing the beer barrel voltage divider, and the alloy stainless steel is treated through a precision casting method to form the beer barrel voltage divider; the beer barrel pressure divider is smelted and poured through the precision casting method, and a poured mold shell is obtained and subjected to annealing treatment.

The invention provides high-hardness easy-to-process ultra-low carbon stainless steel which comprises the following chemical components in percentage by mass: 16-20% of chromium, 8-14% of nickel, 0-3% of molybdenum, 0.15-0.20% of niobium, 0.1-0.3% of nitrogen, less than or equal to 0.03% of carbon and the balance of iron. The preparation method comprises the following steps: S1, proportioning the raw materials; s2, raw material smelting; S3, decarburization refining; S4, component adjustment; S5, ingot casting preparation; s7, steel billet heat treatment; s8, surface treatment machine processing; and S9, product detection and warehousing. 0.15-0.20% of niobium (Nb) and 0.1-0.3% of nitrogen (N) are added into the molten steel, trace niobium nitride and niobium carbide hardened phases are generated during solidification, and stabilization treatment at 850-930 DEG C is added in the subsequent heat treatment procedure, so that niobium nitride and niobium carbide precipitates are dispersed and separated out, the hardness of the casting reaches HB180-220, and the machining cutting performance of the casting is improved.

The invention discloses a niobium nitride film and a generation method thereof, relates to the technical field of semiconductor film preparation, and aims to solve the problem of insufficient thickness control precision of a niobium nitride film in the prior art. The generation method of the niobium nitride film comprises the following steps: providing a silicon substrate; a niobium source and a nitrogen source are sequentially introduced into the reaction cavity in a pulse alternating mode, deposition circulation of the niobium nitride film is carried out on the surface of the silicon substrate, and the niobium nitride film is generated; wherein the niobium source is tert-butyl imino tri (diethylamino) niobium. According to the method, tert-butyl imidotris (diethylamino) niobium is adopted as a niobium source, the niobium nitride thin film is generated through the plasma enhanced atomic layer deposition technology, in the niobium nitride thin film generation process, atomic-scale control over the thickness of the niobium nitride thin film can be achieved, and the uniformity of the niobium nitride thin film is improved.

The application provides a kind of high hardness easy-to-machine ultra-low carbon stainless steel, by mass percent, chemical composition includes: chromium 16-20%, nickel 8-14%, molybdenum 0-3%, niobium 0.15-0.20%, nitrogen 0.1-0.3%, carbon ≤0.03%, the balance is iron. It also includes its preparation method, including S1: raw material proportioning;S2: raw material smelting;S3: decarburization refining;S4: component adjustment;S5: preparation of ingot;S6: ingot hot deformation breakdown processing;S7: billet heat treatment;S8: surface treatment processing;S9: product detection into warehouse. The application adds 0.15~0.20 niobium (Nb) elements and 0.1~0.3% nitrogen (N) elements in molten steel, generates trace amounts of niobium nitride and niobium carbide hardening phase during solidification, and increases 850~930℃ stabilization treatment in subsequent heat treatment process, makes niobium nitride and niobium carbide precipitate and disperse, makes the hardness of castings reach HB180~220, thereby improves the machining cutting performance of castings.

The utility model relates to the technical field of coated glass, in particular to coated glass. The coated glass comprises a glass substrate, the aluminum nitride layer is arranged above the glass substrate; the niobium nitride layer is arranged above the glass substrate; and the silicon carbide layer is arranged above the glass substrate. According to the coated glass provided by the invention, the wear resistance and corrosion resistance of the coated glass are improved.

The utility model relates to a double-layer wear-resistant film-coated cover plate and a display screen comprising the same, the double-layer wear-resistant film-coated cover plate comprises a cover plate body, and a bismuth trioxide layer, a zirconium nitride layer and a niobium nitride layer are sequentially laminated on the front surface of the cover plate body; wherein the thickness of the bismuth trioxide layer is 20-30 nm, the thickness of the zirconium nitride layer is 40-50 nm, and the thickness of the niobium nitride layer is 30-40 nm. By accurately controlling the thickness and the layered structure of each material layer, the wear resistance, the corrosion resistance, the optical performance and the functionality of the glass cover plate are remarkably improved. In addition, by adjusting the thickness of each layer and optimizing the layered structure, the technology can flexibly meet specific requirements in different application scenes.

The application discloses a method for preparing two-dimensional metal nitride by using bulk metal oxide powder, which comprises the following steps: 1) uniformly mixing and grinding metal oxide powder with alkali metal carbonate or alkali metal hydroxide; adding neutral alkali metal or alkali earth metal halide salt, and uniformly mixing and grinding again; 2) performing heat preservation reaction on the mixture obtained in the step 1) under ammonia atmosphere, and cooling; 3) performing acid washing on the reaction product obtained in the step 2), washing to neutral, performing suction filtration and centrifugation, and drying, so as to obtain two-dimensional metal nitride in nanosheet shape. The application firstly proposes a method for preparing two-dimensional metal nitride nanosheet by using alkaline-neutral mixed double salt as an auxiliary, and the alkali metal carbonate or alkali metal hydroxide is used as a reactant to synthesize an intermediate of alkali metal oxide with two-dimensional layer-like structure, and the neutral alkali metal or alkali earth metal halide salt is used as a molten salt auxiliary agent to promote the nitridation conversion of the alkali metal oxide. The method is suitable for preparing two-dimensional niobium nitride by using bulk niobium oxide, two-dimensional tungsten nitride by using bulk tungsten oxide, and two-dimensional molybdenum nitride by using bulk molybdenum oxide, and is related to a simple process and low cost.

This invention relates to the field of powder metallurgy high-nitrogen steel preparation technology, specifically a method for optimizing the corrosion resistance of high-nitrogen steel based on powder metallurgy technology. The method includes: pre-treating gas-atomized high-nitrogen steel pre-alloyed powder by inert gas purging, constant-temperature heating for degassing, and mechanical stirring; then physically mixing it with a nano-chromium nitride, vanadium nitride, and niobium nitride composition; during filling, activating a variable-frequency mechanical vibration table to achieve gradient densification filling with a higher density at the bottom of the mold than at the top; after multi-stage vacuum and inert gas circulation, using stepped heating and simultaneous application of axial pressure and isotropic inert gas static pressure to complete solid-state sintering and preliminary densification. This invention, through gradient filling and multi-field coupled sintering process design, improves powder distribution and sintering densification state, reduces microscopic defects in the matrix, optimizes nitrogen element distribution, and enhances the corrosion resistance of high-nitrogen steel. The process has strong adaptability and is suitable for the powder metallurgy preparation of high-nitrogen steel components.

The invention relates to the field of alkaline electrochemical generators, in particular to the field of accumulators. More specifically, the invention relates to a secondary electrochemical generator with a zinc electrode, characterized in that it comprises: a) an electrolyte, which is an aqueous alkaline solution with a molar concentration of 4 M to 15 M of hydroxide anions, and a concentration of soluble silicates, expressed as silicon dioxide (SiO2), of 0.15 to 80 g / l; b) a zinc electrode comprising a conductive ceramic, which at least partially comprises nitrides and / or hafnium carbides and / or carbides and / or magnesium silicides and / or carbides and / or niobium nitrides and / or carbides and / or carbides and / or titanium nitrides and / or vanadium nitrides and / or carbides and / or azides of any two metals selected from the group consisting of hafnium, magnesium, niobium, titanium and vanadium.

The present invention discloses a chromium aluminum boron cerium / niobium nitride multilayer ultra-thick coating and a deposition method thereof. The chromium aluminum boron cerium / niobium nitride multilayer ultra-thick coating comprises a pure niobium bonding layer located outside a substrate, and an alternating multilayer structure formed by a niobium nitride layer and a chromium aluminum boron cerium nanocomposite layer is provided on the outer side of the pure niobium bonding layer. The pure niobium bonding layer has a thickness of 0.2-1.0 μm, and the alternating cycle of the niobium nitride layer and the chromium aluminum boron cerium nanocomposite layer is 5-50 times, with the thickness of the niobium nitride layer in any cycle being 0.1-1.0 μm, and the thickness of the chromium aluminum boron cerium nanocomposite layer in any cycle being 0.2-2 μm, for a total thickness of 10-150 μm. The chromium aluminum boron cerium / niobium nitride multilayer ultra-thick coating provided by the present invention combines the advantages of high hardness, high heat resistance, low internal stress, and high coating thickness.

The utility model discloses a glass cover plate, a display module and electronic equipment wherein the glass cover plate comprises: a glass substrate layer comprising glass; the bottom layer is arranged on the glass substrate layer; the bottom layer comprises an aluminum oxide layer; the wear-resistant layer is arranged on the bottom layer; the wear-resistant layer comprises a niobium nitride layer and a zirconium nitride layer; the niobium nitride layer is arranged on the bottom layer; and the zirconium nitride layer is arranged on the niobium nitride layer. According to the glass cover plate provided by the embodiment of the invention, the niobium nitride layer and the zirconium nitride layer are arranged, so that the wear resistance of a product is improved.

This application relates to the field of fuel cells, specifically disclosing a highly corrosion-resistant and conductive coating for fuel cell metal bipolar plates based on a micro-nano interpenetrating network structure and its preparation method. The highly corrosion-resistant and conductive coating for fuel cell metal bipolar plates based on a micro-nano interpenetrating network structure comprises, from bottom to top: a metal bonding layer, a corrosion-resistant blocking layer, and a conductive hydrophobic surface layer deposited on the surface of the bipolar plate substrate; the metal component of the metal bonding layer is selected from at least one of titanium, chromium, nickel, aluminum, tungsten, and niobium; the corrosion-resistant blocking layer includes alternating stacked amorphous carbon layers and metal nitride layers, wherein the metal nitride is selected from at least one of titanium nitride, chromium nitride, niobium nitride, zirconium nitride, molybdenum nitride, and tantalum nitride; the conductive hydrophobic surface layer is an amorphous carbon layer or a metal nitride layer containing polytetrafluoroethylene or fluorinated graphene. The coating of this application exhibits good adhesion to the metal bipolar plate and can improve the corrosion resistance and conductivity of the metal bipolar plate, extending the service life of the fuel cell.

The utility model discloses a glass cover plate which comprises a substrate layer, a boron carbide layer, a niobium nitride layer and a niobium pentoxide layer, the boron carbide layer, the niobium nitride layer and the niobium pentoxide layer are sequentially arranged on the surface of the substrate layer from bottom to top in the height direction of the substrate layer; the boron carbide layer, the niobium nitride layer and the niobium pentoxide layer are sequentially arranged on the surface of the substrate layer, the thickness of the boron carbide layer is smaller than that of the substrate layer, and the boron carbide layer is used for improving the mechanical performance and corrosion resistance of the substrate layer. Higher mechanical performance, chemical stability, optical performance and electronic performance are provided for the glass cover plate.

The invention discloses a superconducting diode device based on a single-layer niobium nitride nanoring and a control method thereof, and belongs to the technical field of superconducting electronics, the superconducting diode device comprises an insulating substrate and a niobium nitride layer, the niobium nitride layer comprises a first working line, a second working line and an intermediate ring, the first working line comprises a first line segment, a second line segment and a first middle part, the second working line comprises a third line segment, a fourth line segment and a second middle part, and the middle ring is connected with the first middle part and the second middle part. According to the invention, the single-layer niobium nitride thin film is used, and by virtue of the effects of the geometrically asymmetric nano circular ring and an external magnetic field, a superconductive diode structure with an extremely small structure and a single layer is realized, so that the size of the device is greatly reduced, high-density integration and miniaturization application are facilitated, and low-power-consumption and high-speed rectification control is facilitated to be realized; the difficulty of material and interface control is greatly reduced; the process flow is simple, the repeatability is good, the preparation cost is reduced, and the device consistency is improved.

The utility model discloses a glass cover plate. The glass cover plate comprises a substrate, a protective layer and an additional cover plate, the substrate is provided with a front surface and a back surface; the protective layer is positioned on the front surface, and the additional cover plate is positioned on the back surface; the protective layer comprises a first plating layer, a second plating layer and a third plating layer; on the front surface, the first plating layer, the second plating layer and the third plating layer are sequentially stacked from bottom to top along the thickness direction of the glass cover plate; the additional cover plate comprises a thermochromic layer and an anti-scratch layer, and the thermochromic layer and the anti-scratch layer are sequentially stacked on the back surface along the thickness direction of the glass cover plate from top to bottom. And the thermochromic ink and the niobium nitride layer are arranged on the back surface, so that the performance of the cover plate is comprehensively improved.

The application discloses a dynamic bias anti-latch circuit which can be used for signal reading of a superconducting X-ray detector, comprising three kinds of anti-latch circuits, namely, a direct current bias circuit, an output stage circuit and a superconducting niobium nitride nanowire detector device. The superconducting niobium nitride nanowire with a depth-width ratio exceeding 1:1 is prepared through a micro-nano processing technology, and after being packaged, the superconducting chip is assembled into the three kinds of anti-latch circuits. Circuit 1 is a gate bias circuit, a signal generator provides a gate trapezoidal bias voltage for the detector, circuit 2 is a front-end small resistance active quenching circuit, a 10Ω small resistance is connected in series at the front end of the Bias-Tee to control the circuit current, and circuit 3 is a detector parallel small resistance active quenching circuit, a 50Ω small resistance is connected in parallel at both ends of the nanowire device to discharge the superconducting current of the device. The application can solve the device latch problem caused by the excessively high photon energy in X-ray detection, realize high time precision measurement of X-rays, and can be applied to the field of X-ray detection research.

The invention relates to a layer system (1) for coating a metal substrate (2a) to form a flow field plate (2), comprising:-at least one cover layer (1a) made of a metal oxide; -at least one intermediate layer (1b) supporting the cover layer (1a); and-a lower layer (1c) supporting the intermediate layer (s) (1b); wherein the cover layer (1a) is formed of an indium tin oxide; wherein the indium tin oxide is doped with at least one element from the group including carbon, nitrogen, boron, fluorine, hydrogen, silicon, titanium, tin, and zirconium; wherein the at least one intermediate layer (1b) is formed from titanium nitride and / or titanium carbide and / or titanium carbonitride and / or titanium niobium nitride and / or titanium niobium carbide and / or titanium niobium carbonitride and / or chromium nitride and / or chromium carbide and / or chromium carbonitride; and wherein the lower layer (1c) is formed of titanium or a titanium-niobium alloy or chromium. The invention also relates to a flow field plate having a layer system (1) of this type, and to a fuel cell (10), an electrolytic cell or a redox flow battery having a flow field plate (2, 2 ') of this type.

The invention provides a niobium nitride reduced graphene oxide composite film and method and a flexible supercapacitor, and the method comprises the steps: taking Nb2AlC powder as a precursor, employing a NaF-NH4F-HF composite etching system and a segmented temperature control etching technology, and preparing a Nb2C2Tx MXene suspension with high purity and a few-layer structure; the Nb2C2Tx / rGO composite membrane is prepared by using Nb2C2Tx as a substrate, reducing GO by using hydrazine hydrate to prepare rGO suspension, compounding Nb2C2Tx and rGO by using a spin coating-hot pressing-low temperature annealing process, and forming the Nb2C2Tx / rGO composite membrane with tight interface combination by combining with hydrophilic modification treatment of the substrate. By regulating and controlling the etching temperature, the rGO compounding ratio and the hot pressing parameters, the conductivity, the mechanical property and the cycling stability of the composite film are optimized, and a new path is provided for a high-performance flexible supercapacitor electrode material.

This invention discloses a method for fabricating a superconducting niobium nitride thermionic radiometric calorimeter, employing a silicon oxide / silicon bilayer substrate. A hexanitrogen-niobium-1,6-niobium thin film is grown on the silicon oxide surface of the substrate using radio frequency magnetron sputtering as a buffer layer, followed by DC magnetron sputtering to grow a niobium nitride thin film. External electrodes are patterned using ultraviolet light exposure with a double-layer photoresist, and titanium and gold thin films are grown by magnetron sputtering, followed by lift-off stripping to fabricate the electrodes. A planar helical antenna pattern is patterned using electron beam exposure, and titanium and gold thin films are grown by magnetron sputtering, followed by lift-off stripping to fabricate the antenna. A microbridge pattern is defined using electron beam exposure, and the pattern is transferred to the niobium nitride thin film using reactive ion etching. The area to be etched is defined on the silicon surface of the substrate using ultraviolet light exposure, and silicon is etched away using an FSE deep silicon etching machine to fabricate the levitation bridge structure. This invention maintains the sensitivity at pw / Hz while increasing the operating temperature to 9 K. 1 / 2 Magnitude.

The invention discloses a titanium alloy bipolar plate composite coating and a preparation method thereof, and belongs to the technical field of fuel cells. Comprising a titanium alloy substrate and a titanium nitride and niobium nitride composite coating covering the surface of the titanium alloy substrate, and a niobium nitride phase structure is a two-phase coexistence structure composed of beta-Nb2N and delta-NbN. In the deposition process of the composite coating, under the atmosphere of argon and nitrogen, a titanium alloy substrate serves as a deposition base body, a titanium target and a niobium target serve as target materials, magnetron sputtering is carried out at the same time, the pressure intensity of a cavity is 0.8-1.4 Pa, the temperature of the deposition base body is 20-50 DEG C, the controlled sputtering time is 30-60 min, the flow of nitrogen is 8-40 ml / min, and the flow of argon is 60-92 ml / min. The surface smoothness and compactness of the bipolar plate are improved, and the bipolar plate has excellent corrosion resistance and can effectively resist corrosion damage of F and H in an electrolyte, so that the bipolar plate has the light weight characteristic of a titanium alloy substrate and the protection function of a coating.

This invention discloses a controllable preparation method and application of high-resistivity superconducting nitride thin films. The method first plots a phase diagram showing the distribution of magnetron sputtering modes of the nitride thin film as a function of sputtering current and argon-nitrogen ratio. Based on the trend of sputtering voltage versus sputtering current, the magnetron sputtering modes are classified into metallic, competing, and poisoning modes. Then, a magnetron sputtering volt-ampere curve from the phase diagram is selected, and nitride thin films are grown under typical operating conditions for different magnetron sputtering modes. The distribution of the nitride thin film's crystal phase and electrical properties is observed to determine the basic operating mode for preparing high-resistivity superconducting nitride thin films. Finally, high-resistivity superconducting nitride thin films are grown according to the boundary conditions of the basic operating mode. This invention proposes a universal method for preparing high-resistivity superconducting nitride thin films. The prepared high-resistivity superconducting niobium nitride thin films exhibit significantly higher resistivity than current niobium nitride thin film materials, providing a favorable guarantee for preparing high-saturation quantum efficiency SNSPD detectors.

The utility model discloses a coated glass cover plate which comprises a substrate layer, a polyurethane resin layer, a niobium nitride layer and a boron carbide layer, the polyurethane resin layer, the niobium nitride layer and the boron carbide layer are sequentially arranged on the surface of the substrate layer from bottom to top in the height direction of the substrate layer; wherein the niobium nitride layer and the boron carbide layer are sequentially arranged on the surface of the substrate layer, the coating layer is formed by combining the niobium nitride layer and the boron carbide layer, and the polyurethane resin layer is used for connecting the coating layer and the substrate layer. The wear resistance, corrosion resistance and hardness of the substrate layer, namely the glass cover plate, are improved, good optical performance of the glass cover plate can be kept, and the glass cover plate has important practical application value.

The invention belongs to the field of wire-drawing dies, and discloses a single-crystal wire-drawing die and a preparation method thereof, the single-crystal wire-drawing die comprises an enhanced composite single-crystal matrix and a composite gradient functional coating; the enhanced composite single crystal matrix is prepared from the following raw materials in parts by weight: 50 to 70 parts of silicon carbide, 6 to 12 parts of titanium boride-vanadium carbide core-shell structure powder, 8 to 15 parts of titanium carbide, 10 to 18 parts of aluminum nitride, 5 to 10 parts of gallium nitride, 3 to 6 parts of zirconium boride, 2 to 4 parts of niobium nitride, 0.5 to 1.2 parts of yttrium-stabilized zirconium oxide-lanthanum oxide solid solution, 0.3 to 0.8 part of cerium oxide and 0.1 to 0.5 part of dysprosium oxide; the invention aims to improve the mechanical property of the mold matrix, enhance the binding force of the coating, optimize the preparation process and improve the machining precision and production stability of the mold.

The application discloses a preparation method of a novel nanostructure of a superconducting thin film. The method comprises the following steps: firstly, laying an AAO template on the surface of the thin film; then, determining a punching area; and finally, forming a porous structure with a specified aperture and period in the selected punching area through etching. The thin film is yttrium barium copper oxide YBCO or niobium nitride NbN. The nano-machining technology of the local punching fully protects the non-punching part, and the process is simple and effective. The specified punching area can be in any shape, and large-area selected punching can be realized, which cannot be realized by most micro-nano machining technologies.