71 results about "High energy electron beam" patented technology

The invention provides an interlocking protection optimization system and method of a FLASH accelerator and electronic equipment, and the system comprises an acceleration module which is used for generating an initial electron beam and accelerating the initial electron beam to obtain a high-energy electron beam; the beam quality guarantee module is in signal connection with the acceleration module and is used for monitoring, regulating and controlling the intensity and the position of the high-energy electron beam in real time; the treatment execution module is in signal connection with the beam quality guarantee module and is used for converting the high-energy electron beams into treatment rays and monitoring the output dose of the treatment rays in real time; and a safety interlocking protection module which is in signal connection with the acceleration module, the beam quality guarantee module and the treatment execution module and is used for collecting operation parameters of all parts of the FLASH accelerator in real time, performing analysis based on preset logic, triggering interlocking protection actions under abnormal working conditions, and controlling the treatment execution module to perform treatment. And active monitoring-intelligent analysis-rapid response closed-loop control of the ultrahigh dose rate radiotherapy accelerator in a full operation period is realized.

The invention discloses a high-flame-retardant long-life electric wire and a preparation method thereof. The electric wire comprises a conductor, an inner insulating layer and an outer insulating layer, the inner insulating layer comprises a catalytic char-forming type flame retardant A, the outer insulating layer comprises a heat-insulating barrier type flame retardant B, the conductor is coated with the inner insulating layer and the outer insulating layer in a co-extrusion mode, synchronous high-energy electron beam irradiation crosslinking is achieved, the flame retardant A and the flame retardant B are quantitatively added into the insulating layers, and the flame retardant A and the flame retardant B are added into the insulating layers. A synergistic flame-retardant effect is generated at a high temperature, heat overload generated by conductor resistance and combustion caused by an external fire source are efficiently inhibited, and the high-flame-retardant and long-service-life electric wire is provided.

The invention discloses a method for preparing methane by reforming small molecular alcohol through high-energy electron beam irradiation, and belongs to the technical field of environmental catalysis. According to the method, methane is prepared by reforming small molecular alcohol through high-energy electron beam irradiation. Compared with a traditional biological method, high-energy electron beam irradiation is adopted, substances are irradiated by electron rays accelerated in a high-voltage electric field, molecules of various substances are ionized and excited through interaction of high-energy electrons and the substances, and therefore chemical reactions are initiated. The method disclosed by the invention has a better irradiation methane preparation effect, and the problems of long reaction period (15-30 days), high energy consumption of a preparation process, large carbon emission and the like in the prior art are solved.

The invention provides a diffraction image analysis method and device, a diffraction image processing method and device, equipment and a storage medium. The diffraction image analysis method comprises the following steps: acquiring multiple frames of diffraction images acquired in the growth process of a sample, wherein the diffraction images comprise electron diffraction patterns generated by interaction of a high-energy electron beam and the sample; determining an ROI in the diffraction image, and obtaining an image frame sequence and light intensity time sequence data of the ROI; and performing multi-modal analysis on the image frame sequence and the light intensity time sequence data of the ROI to obtain an analysis result. By adopting the technical scheme provided by the invention, the accuracy of diffraction image analysis can be improved.

The invention discloses a vacuum coating system and a coating method thereof.The coating method comprises the following steps that S1, a target material is dried, naturally cooled and then placed in a crucible, and then a lower shell is sealed; s2, a single crystal germanium sheet and an optical glass sheet are used as substrates to be placed on the flange at the bottom end of the placing cylinder, and the upper shell is sealed; s3, the lower shell and the upper shell are vacuumized; and S4, an electron gun corresponding to the crucible is started, the electron gun generates a high-energy electron beam to heat the target material to the evaporation temperature, and the target material moves upwards in the form of particles after being evaporated and is deposited on the surface of the substrate. According to the invention, the plurality of crucibles are distributed along the vertical direction and share the same axis, so that the evaporation direction of the target material in each crucible is ensured to be consistent. The target material in the crucible moves upwards in the vertical direction of the substrate after being heated to the evaporation temperature, so that frequent adjustment of the position of the substrate is avoided, the operation of the coating process is simplified, the uniformity and efficiency of coating are improved, and the requirements of multi-layer and complex coating are met.

An undulator magnet for use with high energy electron beams is made from a series of segments stacked together, aligned on pole faces, and clamped together with threaded tensioning rods. Each of the segments has a length equal to exactly one-half an undulator period, and each of the segments is individually and separately machined from a flat steel plate and precision ground on an edge, with a contour machined to form a groove. The magnet is made by stacking the series of segments together; aligning the segments using a jig and precision surface; and clamping the segments together with threaded tensioning rods that pass through holes in the segments.

The invention relates to the technical field of chemical textile processing, and discloses a polylactic acid / nanocellulose composite fiber dyeing process, which comprises a spinning solution preparation process, a spinning process and a dyeing process, and the spinning solution preparation process comprises the following steps: uniformly mixing a nanocellulose suspension, a polylactic acid solution and an additive, standing at 30-80 DEG C for 1-2 hours, performing high-energy electron beam radiation to form gel, and washing the gel to obtain a hydrogel spinning solution; in the spinning process, the hydrogel spinning solution is fed into wet spinning equipment for spinning to form fibers, the fibers are subjected to high-energy electron beam radiation drying reinforcement to obtain fiber filaments, the irradiation dose is 10-50 kGy, and the irradiation time is 3-5 minutes. The preparation method disclosed by the invention is simple, feasible, green and environment-friendly, the dye uptake of the prepared composite fiber reaches 80%, the strength of the composite fiber is enhanced by 1-2 times, and the fibrillation resistance is improved by 1-2 times.

The invention provides an electron beam sterilization method of an implant, which is characterized in that the implant is irradiated by using a high-energy electron beam, the irradiation mode is at least twice, the irradiation dose of each time is not more than 20kGy, and the absorbed dose of the implant after irradiation is not less than 16kGy and not more than 50kGy. The method provided by the invention can ensure that the sterility level SAL is less than 10 <-6 >, can ensure that the drug quality of the implant is not affected, and can ensure that no new impurities are generated in the sterilization process.

The invention provides a lunar surface drilling method based on a high-energy electron beam technology, which comprises the following steps of: adopting a high-energy electron beam as a non-contact heat knife, melting lunar soil in situ through annular or conical cutting, and condensing to form a high-strength vitrification lining internally packaged with a lunar soil sample; the high-strength vitrification lining is used as an in-situ generated vitrification sleeve to tightly wrap and solidify the lunar soil sample which is not influenced by heat inside to form a lunar soil sample monomer protected by the high-strength vitrification lining, so that in-situ packaging of the lunar soil sample is realized. The invention relates to a lunar surface drilling and in-situ packaging sampling method based on a high-energy electron beam technology, in particular to a method for drilling, sampling and melting hole forming on the surface of the moon by using the high-energy electron beam technology, which is suitable for scientific detection of the moon, in-situ resource utilization and base construction. And more technical means are provided for detection and exploitation of lunar mineral resources.

The utility model provides a device for optimizing the uniformity of a large-size wafer film, and relates to the technical field of superconducting quantum computing. A device for optimizing the uniformity of a large-size wafer film comprises a vacuum chamber, a control computer, a remote control handle and a sample table, electron beam evaporation equipment, a rate crystal oscillator and a film thickness crystal oscillator are fixedly connected in the vacuum chamber, and the sample table is connected with the inner top wall of the vacuum chamber through a spiral supporting rod. And a crucible is arranged at the top of the electron beam evaporation equipment. A plurality of high-energy electron beams reach the surface of the crucible under the action of an alternating magnetic field, the positions of electron beam light spots on the surface of the crucible are controlled through a control computer and a remote control handle, materials in the crucible can be melted better through simultaneous operation of the electron beam light spots, the diffusion range of evaporation materials becomes large, dense and uniform during evaporation, and the evaporation efficiency is improved. Therefore, the uniformity of the large-size wafer film is obviously improved.

The invention belongs to the technical field of tungsten coating modification, and particularly relates to a post-treatment modification method for a tungsten coating on the surface of a high-temperature heat exchange component. The heat source effect of the high-energy electron beam applied to the surface of the coating and the cooling heat exchange effect of the coolant introduced into the component are utilized, so that temperature gradient distribution with the temperature gradually increased from the cooling end to the surface of the tungsten coating is formed in the component; further, the organization structure of the tungsten coating is improved (residual stress is removed, a large number of dislocations and defects are eliminated, and interface bonding between organizations is promoted), the cohesion of a coating material is strengthened, the heat conductivity and the thermal shock resistance of the coating are improved, the porosity of the coating is reduced, remarkable grain coarsening of the coating material can be avoided, and the service life of the coating is prolonged. And meanwhile, the temperature of the transition layer and the substrate material is low, is still in a safe temperature range and is not affected by large heat, and the difficult problem that a traditional post-processing technology causes adverse heat influence on the non-coating part of the coating-substrate composite structural part is solved.

The present application relates to a preparation process of isotropic pitch and high softening point coating pitch, which uses aromatic oil as raw material oil, and bio-tar or / and bio-pitch as co-carbonization agent. The pre-polymer material is obtained by pre-polymerization reaction of the bottom into the pre-polymerization reactor under the induction of oxygen-containing linear polymer. The photosensitive oxidation crosslinking agent is added to the pre-polymer material, the material distribution tray in the middle of the oxidation crosslinking reaction tower is fed, and the oxidation crosslinking gas enters from the lower part of the crosslinking reaction tower through the gas distributor. The obtained crosslinking pitch product is discharged from the bottom of the reaction tower. The crosslinking pitch then enters the middle of the polymerization reactor, and the polycondensation reaction occurs under the induction of high-energy electron beam irradiation. The polycondensation pitch product is obtained from the lower part of the polymerization reactor. The polycondensation pitch product enters the upper part of the extraction separation tower, and the sub / supercritical solvent enters the lower part of the extraction separation tower. The two-phase countercurrent contact extraction separation is carried out, and the isotropic pitch and high softening point coating pitch are obtained after the extraction solvent is separated.

The invention discloses a large-size hemispherical glass composite strengthening method which comprises the following steps: (1) carrying out laser-induced crystallization treatment on an original inch hemispherical glass sheet, specifically, corroding the original glass sheet with hydrofluoric acid, coating a light absorption layer on the surface of the glass, and carrying out glass surface crystallization processing by adopting laser to obtain a crystallized glass sheet; finally, the glass is put into an annealing furnace for annealing treatment; and (2) cleaning the surface of the glass subjected to laser induction treatment, putting the glass into a vacuum or inert gas environment, scanning the surface of the glass by using a high-energy electron beam generated by an accelerator, and finally putting the glass into an annealing furnace for annealing treatment. The obtained large-size hemispherical tempered glass has the advantages of being excellent in mechanical performance, free of thermal deformation risk in the strengthening process, designable in crystal phase and the like, and in addition, the composite strengthening method has the advantages of being energy-saving and environment-friendly in process, safe, reliable and the like, and has good industrial application prospects.

The application relates to a method for realizing beam expansion and divergence angle compression by a quadrupole magnet and a solenoid, which is used for controlling high-energy electron beams generated by an accelerator, eliminating the influence of the Coulomb force of the electron beams and weakening the divergence angle of the electron beams. The method realizes electron beam expansion and primary compression of the divergence angle by four fixed permanent quadrupole magnetic rings and one electric quadrupole magnetic ring, and realizes ultimate compression of the beam divergence angle by one composite solenoid electromagnet. The electron beam radius is expanded from the millimeter level to the centimeter level in a very short distance, the influence of the Coulomb force is reduced by 1-2 orders of magnitude, and the increment of the divergence angle is controlled in the 0.01 mrad level. The initial divergence angle of the electron beam is compressed from the 1 mrad level to the 0.1 mrad level, and theoretically, the beam spot can be compressed from the meter level to the 10 cm level when the electron beam is transmitted for 1 km, so that the transmission distance of the electron beam is greatly increased.

The invention relates to a secondary electron detector for an atmospheric pressure electron microscope, characterized in that the secondary electrons generated by the irradiation of a high-energy electron beam on a sample are captured by a graphene ultra-thin film, wherein, by applying a voltage between the graphene ultra-thin film and the sample, air or injected ions between the graphene ultra-thin film and the sample are ionized and greatly amplified by an avalanche effect, and the ion current is displayed as an image on a monitor via an amplifier.

The invention provides a module structure of a titanium-based corrosion-resistant vacuum funnel and a preparation method, welding flux is pre-placed between a mounting part of the funnel and a welding part of a cover body, and the welding part of the cover body and the mounting part of the funnel are aligned and then are closed. And the welding part of the cover body is pressed above the mounting part of the funnel to form coaxial covering, the welding flux is uniformly distributed in the clamping area, and welding heating is prepared. The assembly is placed in a vacuum cavity, a high-energy electron beam is used for locally heating a welding area, welding flux is rapidly melted, spread and filled in the three welding grooves and gaps around the three welding grooves in the extremely-small heat influence area, triple annular welding connection is formed after cooling, welding seams are compact, and stress is low. The electron beam welding is completed in a vacuum environment, no air hole exists in a welding seam, a welding closed system is formed after the first annular welding groove, the second annular welding groove and the third annular welding groove are fully filled with welding flux, and the overall negative pressure leakage resistance is greatly improved.

The invention discloses a polyester film and a preparation method thereof, relates to the field of polyester film preparation, aims to solve the problems of insufficient crosslinking uniformity and small performance improvement in the prior art, and adopts the technical scheme that a target pretreatment-multi-field synergistic irradiation-deep post-treatment integrated technical scheme is adopted; a high-energy electron beam is used as a core radiation source, and the polyester film is subjected to all-directional modification by combining targeted pretreatment, magnetic field assistance and a synergistic post-treatment process. Recycling defects of polyester are repaired through pretreatment, cross-linking uniformity is improved through the synergistic effect of electron beams and a magnetic field, the performance is enhanced through deep aftertreatment, and finally collaborative optimization of tensile strength, thermal stability, transparency and performance uniformity of the polyester film is achieved.

The invention relates to the technical field of beam gates, and discloses a particle beam gate structure and a beam gate control device.The particle beam gate structure comprises a first polar plate group, a second polar plate group, a third polar plate group and a Faraday cage which are sequentially arranged; the first polar plate group is provided with a first electric field operation area for deflecting the electron beam; the second polar plate group is provided with a second electric field operation area and is used for reversely deflecting the electron beams passing through the first electric field operation area; the third polar plate group is provided with a first space and a third electric field operation area, the first space and the third electric field operation area are oppositely arranged, no electric field is arranged in the first space, and the third electric field operation area is used for deflecting a high-energy electron beam. The first polar plate group and the second polar plate group enable the low-energy electron beam to be incident to the Faraday cage after being subjected to two times of inclined deflection; the high-energy electron beam is incident to the Faraday cage after being deflected for three times, so that the problem that electron beams with different energies cannot be deflected by the beam brake under the same voltage in the existing design is effectively solved.

The invention is suitable for the technical field of welding, and provides a red copper water-cooling panel electron beam welding preparation process which comprises the steps that a water-cooling panel is divided into a water-cooling panel cover and a water-cooling panel bottom according to a three-dimensional model; a welding tool plate is arranged on one side of the water-cooling panel bottom, and the water-cooling panel bottom and the water-cooling panel cover are fixed through process holes in the water-cooling panel bottom and mounting holes in the welding tool plate; the bottom of the water-cooling panel is fixed through a plurality of beam welding tool clamps of the welding tool plate; all welding seams of the water-cooling panel bottom and the water-cooling panel cover are subjected to melting welding through high-energy electron beams; and the beam welding tool clamp and the welding tool plate are dismounted, and the red copper water-cooling panel is obtained. According to the preparation technology, all welding seams are subjected to high-energy electron beam fusion welding, heating before welding is not needed, welding wires do not need to be added, a welding tool plate is adopted for fixing in the welding process, welding deformation is small, the welding depth is controllable and adjustable, and the welding quality is stable and reliable.

The invention relates to the technical field of electron optics, provides a secondary radiation excitation device and an analysis and detection instrument, and is used for solving the problem that the reliability of an electron gun and other accessories is influenced by metal steam and cations generated when a high-energy electron beam bombards a metal target material. The secondary radiation excitation device comprises an excitation source and a metal target material, the excitation source is used for emitting electron beams, and the metal target material is arranged on an advancing path of the electron beams, receives bombardment of the electron beams and generates secondary radiation; at least one conductive film layer is arranged on the bombarded working surface of the metal target material and / or at least one conductive film layer is arranged on the traveling path of the electron beam, and the conductive film layer is used for preventing metal atoms and metal cations generated when the metal target material is bombarded from passing through, so that the electron beam and secondary radiation can pass through the conductive film layer under the condition of not influencing the electron beam and secondary radiation to pass through the conductive film layer; and metal cation reverse detonation can be prevented, and metal steam is prevented from polluting devices such as insulating parts.

This invention discloses a supersonic drying system and dehydration method for particles, relating to the field of particle drying technology. The system includes a collection cylinder fitted outside an accelerating cylinder. By guiding thermosensitive polymer particles into a vortex flow field, they are suspended and spirally ascended under the dynamic balance of centrifugal force and airflow drag. The low-pressure environment generated by the vortex flow field lowers the boiling point of water on the particle surface, and combined with a heat-generating unit, moisture evaporation can be achieved at a relatively low temperature. Subsequently, a high-energy electron beam excited by a plasma generator promotes the migration and evaporation of moisture from the particles, enhancing the drying effect. After dehydration, the particles automatically detach from the vortex flow field due to density changes and enter the collection zone, while the nitrogen flow carries the evaporated water vapor into the discharge zone, achieving automatic separation of the particles and the nitrogen flow. This invention, through its unique structural design and particle motion drying process, is suitable for thermosensitive polymer particles, avoiding thermal degradation and achieving highly efficient particle drying.

The invention discloses a twelve-hole far infrared heating fiber and a preparation method thereof, and relates to the technical field of textile fabrics. The preparation method comprises the following steps: firstly, carrying out plasma ball milling on nano tourmaline and titanium powder together, then grafting 2, 5-dihydroxy terephthalic acid to the surfaces of particles to prepare modified nano tourmaline, and preparing the modified polyester master batch from the modified nano tourmaline, so that the modification of the nano tourmaline enhances the compatibility of the nano tourmaline and a polyester matrix, and far infrared rays can be released through molecular vibration; meanwhile, the modified nano tourmaline can also be used as a heterogeneous nucleating agent, so that the crystallization rate and crystallinity of the polyester are improved, and the mechanical property of the fiber is improved; the twelve-hole far-infrared heating fiber is obtained by coating the multi-benzene-ring film on the surface of the fiber after high-energy electron beam irradiation, and the multi-benzene-ring structure of the surface film layer obviously reduces the surface energy of the material, protects the internal fiber structure and tourmaline, and prolongs the service life of the twelve-hole far-infrared heating fiber. The twelve-hole far infrared heating fiber prepared by the invention has a warm-keeping effect.

The invention relates to the technical field of biology, in particular to a low-protein adsorption surface material and a preparation method thereof. The invention provides a preparation method of a low-protein adsorption surface material. The preparation method comprises the following steps: (1) carrying out low-temperature plasma treatment on the surface of a to-be-treated material; (2) coating the surface of a to-be-treated material with the low-protein adsorption dissolving solution; the low-protein adsorption dissolving solution comprises a substance A, a substance B and a photoinitiator, the substance A is at least one of compounds containing at least one hydroxyl group; the substance B is a polyester polymer with a polyether chain segment; (3) carrying out ultraviolet polymerization on the surface of the to-be-treated material coated in the step (2); (4) the surface of the to-be-treated material obtained in the step (3) is subjected to high-energy electron beam irradiation; the material obtained in the scheme can keep low adsorption of protein and polypeptide in a low-temperature environment for a long time.

This utility model belongs to the field of electron beam irradiation sterilization technology, specifically relating to a high-energy electron beam irradiation sterilization device. It includes a sterilization chamber fixedly mounted on a support frame, a transfer roller rotatably connected to the support frame, and a transfer belt driven by the transfer roller. An adjustment opening structure is provided on the outer wall of the sterilization chamber. An electron beam generator is fixedly installed inside the sterilization chamber. A flipping mechanism, including an adjustment structure, is provided within the sterilization chamber. This high-energy electron beam irradiation sterilization device, through the cooperation of the flipping frame and the transfer belt, utilizes the inertia of the object to flip the frame, causing the bottom surface of a square object in contact with the transfer belt to flip upwards. This facilitates sterilization of the bottom of the object, solving the problem of sterilization dead zones caused by the bottom surface of the object contacting the transfer belt in traditional devices, achieving sterilization without dead zones and improving the sterilization effect.

The application discloses a vacuum coating system and a coating method thereof, and comprises the following steps: S1, drying the target material, and placing the naturally cooled target material in a crucible, and then sealing a lower shell; S2, placing a single crystal germanium sheet and an optical glass sheet as a substrate on a flange at the bottom end of a placing cylinder, and sealing an upper shell; S3, vacuumizing the lower shell and the upper shell; and S4, starting an electron gun corresponding to the crucible, and generating a high-energy electron beam to heat the target material to an evaporation temperature, and after the target material evaporates, the target material moves upwards in the form of particles and is deposited on the surface of the substrate. The application adopts a design that multiple crucibles are distributed along a vertical direction and have coaxial lines, so that the evaporation directions of the target materials in each crucible are consistent. After the target materials in the crucibles are heated to the evaporation temperature, the target materials move upwards in the vertical direction of the substrate, the position of the substrate is not frequently adjusted, the operation of the coating process is simplified, the uniformity and efficiency of the coating are improved, and the coating process is suitable for the requirements of multilayer and complex coating.

An electron beam focusing control device and method based on electric dipole magnets are used for beam precise control technology of large-scale electron beam accelerators. In view of problems of high-energy electron beam transmission trajectory distortion and beam divergence under the geomagnetic field, an electron beam focusing control method based on electric dipole magnets is proposed. Firstly, according to the geomagnetic field, target coordinates and beam parameters, the beam focusing control algorithm is substituted and solved to obtain the emission angle of the electron beam with different energies. Secondly, the calculated beam emission angle is converted into the accelerator pointing and the magnetic field strength and direction of the electric dipole magnet. Finally, the excitation current amplitude of two groups of electric dipole magnets or the excitation current amplitude of one group of electric dipole magnets and the rotation angle of the rotating structure are set, so that the focusing of the electron beam is realized.

The invention relates to the technical field of tire manufacturing, and discloses a tire side bulge prevention structure of an all-steel agricultural radial tire and a preparation process of the tire side bulge prevention structure. The tire sidewall bulge prevention structure comprises a tire sidewall area which is sequentially provided with a lining layer, an irradiation tire body reinforcing rubber sheet and a tire body cord fabric from the inner side to the outer side, the preparation process comprises the following steps: S1, preparing a rubber composition film; s2, preparing an irradiation tire body reinforcing rubber sheet; s3, the irradiation tire body reinforcing rubber sheet is precisely attached to the designated position of the outer surface of the lining layer; s4, a carcass ply is attached to the outer side of the irradiation carcass reinforcing rubber sheet; and S5, carrying out integral molding, shaping and vulcanization on the tire. By adopting the technical scheme that the high-energy electron beam is adopted to irradiate the pre-vulcanized reinforced rubber sheet and the rubber sheet is precisely positioned and attached, rigid support is provided for the tire body cord fabric, the stress distribution is homogenized, and the problems that local bumps on the sidewall are eliminated, and periodic bumps and recesses are easy to appear from a pattern groove to the sidewall position when the tire is inflated and loaded are solved.

We provide a secondary electron detector for atmospheric pressure electron microscopes. [Solution] The secondary electron detector 100 provided in an atmospheric pressure electron microscope is characterized in that secondary electrons generated when a high-energy electron beam is irradiated onto a sample are collected in a graphene ultrathin film, and when a voltage is applied between the graphene ultrathin film and the sample, ionization of the air or injected gas between the graphene ultrathin film and the sample occurs, which is greatly amplified by the avalanche effect, and the ion current is displayed as an image on a monitor through the amplifier.

The invention provides a preparation method of high-purity metal vanadium, which comprises the steps of raw material selection, aluminothermic reduction, electron beam melting equipment configuration, preheating and vacuumizing, electron beam melting, repeated melting and cast ingot forming, specifically, high-purity V2O3, high-purity aluminum powder and potassium chlorate are mixed and subjected to a vacuum aluminothermic reduction reaction under the protection of argon, and the high-purity metal vanadium is obtained; the vanadium-aluminum alloy with the vanadium content of 75% is generated; electron beam melting: focusing a high-energy electron beam on the vanadium-aluminum alloy through an electron gun, melting the high-energy electron beam and dripping the high-energy electron beam into a molten pool; multiple smelting: smelting twice or multiple times, and respectively removing high-vapor-pressure impurities and low-vapor-pressure impurities; cast ingot forming, wherein molten metal obtained after smelting is cooled and crystallized to form a cast ingot; according to the method, the vanadium-aluminum alloy is prepared by optimizing electron beam melting process parameters and combining an aluminothermic reduction method, and efficient and low-cost production of high-purity vanadium metal is achieved.

The invention discloses a sub-wavelength infrared antenna structure based on a bismuth telluride metasurface nanopore array and a preparation method of the sub-wavelength infrared antenna structure, and relates to the field of metasurface antenna design and infrared band application. According to the structure, bismuth telluride is used as a core material, and a 12 * 12 metasurface nanopore array is prepared through a high-energy electron beam in a transmission electron microscope to serve as a sub-wavelength infrared antenna. The antenna is excited by a dipole source in the center of an array, and full-wave time domain finite difference simulation optimization design is adopted. In the infrared band, the directional coefficient of 15 dBi, the gain of 14.5 dBi and the radiation efficiency of 93% are achieved, and the sub-wavelength size design is achieved due to the high refractive index characteristic of bismuth telluride. The problems that a traditional metal metasurface antenna is large in ohmic loss and large in size in the infrared band are solved, miniaturization, high directivity and adjustable radiation characteristics are achieved, and the polarization adjustable potential is achieved. The method can be widely applied to the fields of infrared communication, sensing, imaging and the like.