2532 results about "Argon gas" patented technology

The invention discloses an automatic welding device for a rotary alloy furnace tube, and belongs to the technical field of arc welding equipment.The automatic welding device for the rotary alloy furnace tube comprises a base and a U-shaped bin located at the top of the base, and the two ends of the interior of the U-shaped bin are jointly provided with a centering clamping mechanism used for clamping the outer side of the furnace tube; a driving mechanism for providing power for the centering clamping mechanism to clamp the furnace tube is arranged on the outer side of the centering clamping mechanism, and a welding mechanism is arranged on the inner top of the U-shaped bin. A local sealing design is adopted for the inflation mechanism, the annular air bag is attached to the inner wall of the furnace tube after being inflated, an independent cavity communicated with the outside only through a welding seam gap is formed near the welding seam, the protection requirement can be met only by filling the local space with argon, the whole furnace tube or a large-range external space does not need to be filled, and compared with traditional overall argon filling, the argon filling efficiency is greatly improved. The argon consumption is greatly reduced, the industrial gas purchase cost is remarkably reduced, and the production cost investment is reduced.

The invention provides a high-stability lithium-rich manganese-based positive electrode material and a preparation method thereof, and relates to the technical field of lithium-rich manganese-based positive electrode materials, and the method comprises three steps of preparation of a homogeneous precursor, solid-state mechanical fusion doping and coating, and high-temperature sintering; a lithium-rich manganese-based precursor is prepared by adopting a homogeneous coprecipitation process, uniform distribution of metal ions is ensured, then an aluminum source, a zirconium source and a fluorine source are introduced as doping agents, phosphate and a titanate coating agent are combined, doping and coating integrated treatment is realized through mechanical ball milling, and the lithium-rich manganese-based composite material is obtained. And finally, mixing with a lithium source in an argon atmosphere, and carrying out high-temperature sintering of temperature programming and staged heat preservation to form a stable composite coating layer in situ. Therefore, manganese ion migration is effectively inhibited through lattice doping, a layered structure is prevented from being converted into spinel or rock salt phase, meanwhile, a nanoscale ion / electron transmission channel is constructed, interface impedance is reduced, and the charging and discharging efficiency under high voltage is improved.

The invention relates to the technical field of aluminum alloy materials, in particular to a high-temperature-resistant and high-strength aluminum alloy material and a preparation method thereof. The problems that an existing aluminum alloy material is insufficient in mechanical property and poor in high temperature resistance are solved. A plurality of strengthening elements with synergistic effects, including copper, magnesium, scandium, zirconium, nickel, manganese and titanium, are introduced into an aluminum alloy matrix, meanwhile, multiple layers of graphene nanosheets are added for step-by-step smelting, and under argon protection, hexachloroethane refining and lithium salt complexing agent grain refinement are performed to prepare a smelted alloy; and by combining the multi-stage refined smelting, the staged heat treatment process, the three-stage aging treatment and the surface modification process, the microstructure is optimized, and meanwhile the surface performance is improved. According to the prepared aluminum alloy material, through multi-element cooperation and multi-process optimization, the mechanical property, the high temperature resistance and the surface oxidation resistance of aluminum alloy are remarkably improved, and the aluminum alloy material is suitable for the field of aerospace.

The invention discloses a diamond film and a preparation method and application thereof, and the preparation method comprises the steps: taking a substrate material matched with the lattice constant of a diamond film material as a substrate, and carrying out the surface treatment of the substrate; mixed reaction gas comprising 80%-95% of hydrogen, 3%-8% of methane and 2%-12% of auxiliary gas is introduced, wherein the auxiliary gas comprises at least one of argon, chlorine, hydrogen fluoride and hydrogen chloride; carrying out controlled chemical vapor deposition at 850-1000 DEG C under the pressure of not less than 21 kPa, and growing a diamond film on the surface of the substrate; and annealing the diamond film. According to the method, chemical vapor deposition is controlled through cooperation of auxiliary gas and temperature-pressure gradient, and non-corrosion high-speed growth of the high-purity monocrystal diamond film is achieved; in combination with a dynamic annealing process, lattice defects are effectively repaired, the comprehensive performance is optimized, and the reliability of the thin film serving as a heat dissipation component and other applications is remarkably improved.

The invention discloses a method for preparing spherical metal fine powder by using coarse / waste powder through ultrasonic atomization, which comprises the following steps of: (1) collecting coarse / waste powder raw materials for ultrasonic atomization powder preparation, (2) conveying the coarse / waste powder to an electric arc melting area through argon gas flow, and carrying out melting and ultrasonic atomization powder preparation processing; (3) in the powder preparation process, the powder is continuously collected by using argon circulating airflow, so that the continuity of the powder preparation process is ensured; and (4) finally screening the prepared powder in particle size ranges to obtain high-quality spherical fine powder in different particle size ranges. According to the method, the recycling and reusing problems of 3D printing splashing waste powder and coarse powder in the traditional gas atomization powder manufacturing process are solved, and the powder pollution risk is remarkably reduced; according to the ultrasonic atomization re-powdering technology, the high-quality spherical metal fine powder needed by additive manufacturing can be efficiently prepared, powder waste discharge and environmental burden are reduced, the obtained powder can be directly used as a high-quality raw material for additive manufacturing, and green and sustainable development of the metal additive manufacturing industry is promoted.

The invention belongs to the technical field of TG-DSC testing of metal powder materials, and particularly relates to an anti-oxidation high-precision TG-DSC testing method of high-temperature alloy powder, which comprises the following steps: placing the high-temperature alloy powder in a furnace body of a TG-DSC instrument, carrying out high-purity argon replacement on the atmosphere in the furnace body by taking high-purity argon as furnace body purging gas, and carrying out high-purity argon replacement on the atmosphere in the furnace body; the initial oxygen content in the furnace body is reduced to 0.1 ppm or below; continuously introducing hydrogen-argon mixed gas as flowing gas into the furnace body, controlling the temperature of the furnace body to be increased to a target temperature, and ending the test to obtain a TG curve and a DSC curve of the to-be-tested high-temperature alloy powder; according to the invention, through physical cleaning of oxygen in the furnace body by circulating vacuumizing before testing and chemical cleaning of oxygen permeating into the furnace body by hydrogen-argon mixed gas in the whole process in the testing process, a dual anti-oxidation barrier is constructed, so that oxidation weight increment and oxidation heat release interference of a powder sample are eliminated fundamentally; therefore, the real mass change and the heat flow signal change of the alloy powder sample in the temperature programming process can be accurately measured.

The invention provides an argon flow and micro-positive pressure linkage control method for an electroslag furnace. The method comprises the steps that the oxygen content and micro-positive pressure signals in the furnace are collected; the future furnace condition is predicted through the deep belief network model; optimizing initial parameters of the fuzzy PID controller in an off-line manner by using a particle swarm algorithm; on the basis of the real-time signal and the prediction result, adaptively adjusting controller parameters on line; and finally, an argon flow and dust removal valve opening control instruction is output in a linkage mode. According to the method, future furnace conditions are predicted through the deep belief network model, the control advancement is realized, and the problem of large lag of the system is solved; offline parameter optimization is carried out on the fuzzy PID controller through a particle swarm algorithm, and excellent initial performance adapting to different working conditions is provided for the fuzzy PID controller; the parameters of the controller are adaptively adjusted through online fuzzy reasoning, so that the system has robustness for coping with a dynamic process; finally, accurate and stable linkage control of the oxygen content in the furnace and the micro-positive pressure is achieved through linkage calculation of the argon flow and a dust removal valve opening instruction.

The present application belongs to the technical field of gaseous arsenic adsorption, and particularly relates to a sulfur-tolerant gaseous arsenic adsorption material, a preparation method and application thereof. Manganese oxide and an iron source are mixed and placed in a ball mill jar, then the ball mill jar is sealed, argon is filled into the jar, and the iron-modified manganese oxide adsorption material is obtained by ball milling. The addition of iron improves the sulfur tolerance of manganese oxide, so that the adsorbent still has high gaseous arsenic adsorption capacity under high-concentration SO2 conditions, and is suitable for the removal of gaseous arsenic in typical high-SO2 flue gas, i.e. non-ferrous smelting flue gas. The preparation method is simple, the cost is low, the gaseous arsenic adsorption capacity is large, and the present application has a wide application prospect.

The invention discloses a preparation method and application of a zinc-bromine flow battery positive electrode material, and belongs to the field of zinc-bromine flow batteries. The preparation method comprises the following steps: firstly, cleaning and activating a carbon-based three-dimensional conductive network substrate by adopting plasmas, performing oxygen / argon plasma etching, and performing chemical vapor deposition on carbon to prepare three-dimensional porous carbon; then growing a metal oxide nanocrystalline array on the three-dimensional porous carbon by a hydrothermal method, and carrying out ammonia gas calcination to convert the metal oxide nanocrystalline array into a metal nitride nanocrystalline array; then preparing an electro-deposition solution containing tin bismuth salt and an aniline-bromine source polymerization solution, and constructing Sn-Bi bimetallic nanoparticles and a polyaniline-bromine complex layer on the metal nitride nanocrystalline array / three-dimensional porous carbon precursor through electro-deposition and electro-polymerization in sequence to finally prepare the high-performance zinc-bromine battery positive electrode material. The positive electrode material has high conductivity, excellent Br2 / Br <-> catalytic activity and structural stability, and the coulombic efficiency, the voltage efficiency and the energy efficiency of the battery are remarkably improved.

The invention discloses a molten metal fluidity improving method and system in the V-method casting process, and relates to the technical field of casting, a high-pressure airflow and mechanical brush composite mode is adopted for cleaning a casting mold cavity and preheating the casting mold cavity, and precoated sand is selected for preparing a sand mold through vacuum negative-pressure compaction; a sectional type negative pressure regulation and control strategy is adopted, and the stepped composite pouring gate structure is optimized; degassing the molten metal by argon or nitrogen, controlling the temperature, and adding an inoculant and a flow promoter in proportion; the casting speed is controlled according to the three-section type rate through the casting table with the adjustable inclination angle; arranging an insulated riser at the thick and large part of the casting, maintaining a negative pressure field after casting, and covering an insulating material; dividing cooling areas according to wall thickness, and gradually relieving pressure after cooling to a set temperature; and after shot blasting and flaw detection, recording data and establishing a process parameter-flowability association database. Through mold preheating, negative pressure gradient regulation and control and pouring gate design improvement, the molten metal fluidity is remarkably improved, and the casting quality stability and the production efficiency are greatly improved.

The invention discloses a magnetron sputtering coating method with uniform coating and high target material utilization rate, and belongs to the technical field of film preparation, and the method realizes high-precision coating through whole-process collaborative optimization of pretreatment, sputtering, deposition and post-treatment. The substrate is cleaned in cooperation with radio-frequency pulse focusing bombardment; an electromagnetic coil group containing a temperature compensation coil is used for target sputtering, a magnetic field is dynamically adjusted in combination with laser profile sensing and a PID self-adaptive algorithm, and a direct current pulse-radio frequency composite power supply is matched to solve the target problem; in the deposition stage, a quartz crystal instrument is used for closed-loop film thickness control, metal film pulse gas supply and compound film reaction gas phase adjustment; gradient temperature rise is carried out according to data of an X-ray stress meter in post-treatment, and argon is used for dynamic protection and impurity prevention. According to the magnetron sputtering coating method with uniform coating and high target material utilization rate, the uniformity of coating and the target material utilization rate are improved, and the technological adaptability and stability of coating are improved.

The invention discloses a self-lubricating aluminum coating and a preparation method thereof.The preparation method comprises the steps that molybdenum disulfide is pretreated through a silane coupling agent, tetraethoxysilane mixed liquor is added, the pH is adjusted to be 9-10, a water bath reaction is conducted, and molybdenum disulfide-silicon dioxide microcapsules are obtained after high-temperature strengthening treatment; respectively adding a zinc nitrate solution and a hexamethylenetetramine solution, adjusting the pH value to 10-11, carrying out a high-temperature and high-pressure hydrothermal reaction to obtain zinc oxide nanorods, and carrying out ball milling treatment on the zinc oxide nanorods, microcapsules, stearic acid and zirconium oxide balls under the protection of argon to obtain doped microcapsules; after raw materials are pretreated, the raw materials and a dispersing agent solution are added into a mixer respectively, spraying powder, a pretreated base body and the spraying powder are obtained after mixing treatment, spraying treatment is conducted on the surface of the base body through a plasma spraying method, and the self-lubricating aluminum coating is obtained after vacuum annealing treatment. Therefore, the obtained self-lubricating aluminum coating is low in friction coefficient, high in performance and excellent in self-lubricating property.

The invention discloses a compact accelerator extremely-high vacuum system and an implementation method thereof. The compact accelerator extremely-high vacuum system comprises a dipole iron vacuum chamber, a BUMP iron vacuum chamber, a BPM cavity, a vacuum pump chamber and a quadrupole iron vacuum chamber which are sequentially connected to form a beam main line. A plurality of non-evaporable getter sheets are arranged in the dipole iron vacuum chamber and the quadrupole iron vacuum chamber in an array manner and are used for extracting active gas in a beam main line to obtain extremely high vacuum; a vacuum measuring gauge tube, a sputtering ion pump, a molecular pump and a gate valve are installed on the vacuum pump chamber, the vacuum measuring gauge tube is used for measuring the vacuum degree in the beam main line, the sputtering ion pump is used for extracting argon and methane in the beam main line and conducting baking, and the molecular pump is used for rough extraction of the beam main line and exhaust in the baking process; the gate valve is used for separating the molecular pump from the beam main line. According to the invention, hydrogen, carbon monoxide and other active gases in the system can be extracted under the condition that a titanium sublimation pump cannot be installed due to insufficient space, so that extremely high vacuum can be obtained.

The invention discloses a substrate pre-cleaning method based on PECVD (Plasma Enhanced Chemical Vapor Deposition), and belongs to the technical field of semiconductor film deposition. The method mainly comprises the steps that a substrate to be deposited is placed on a heater in a deposition cavity, and the vacuum degree in the closed deposition cavity is adjusted to a first preset value; argon is introduced into the deposition cavity at a preset flow rate, and the vacuum degree in the deposition cavity is adjusted to a second preset value; forming a radio-frequency electric field in the deposition cavity by using a high-frequency radio-frequency power supply, and ionizing argon gas by using the radio-frequency electric field to form argon ions; and the surface of the to-be-deposited substrate is bombarded through argon ions until impurities on the surface of the to-be-deposited substrate are removed, and the vacuum degree in the deposition cavity is adjusted back to a first preset value after the impurities are removed. The physical bombardment characteristic of argon plasma is utilized to achieve efficient removal of surface pollutants of the to-be-deposited substrate, and meanwhile seamless connection of pretreatment and the deposition process is guaranteed through cooperative control of all systems of equipment.

The invention relates to the technical field of wave-absorbing materials, and particularly discloses a Zn-Fe-Mn oxide-hard carbon composite material and a preparation method and application thereof. The preparation method comprises the following steps: preparing pomegranate-shaped spheres through a coprecipitation-calcination method; then, uniformly dispersing the mixture in a self-made solvent composition, and curing and molding the mixture through heating treatment; and finally, carrying out annealing treatment in a high-temperature tube furnace at the temperature of 800 DEG C in an argon protective atmosphere (the flow rate is 100 sccm), so as to prepare the Zn-Fe-Mn oxide-hard carbon composite material. The composite material has a unique three-dimensional layered structure, shows excellent broadband microwave absorption characteristics, and can realize efficient electromagnetic wave attenuation. And a new way is opened up for structural design and optimization of the high-performance wave-absorbing material, and the wave-absorbing material has a wide application prospect in the application fields of advanced stealth technology and novel electromagnetic shielding.

The invention provides laser additive manufacturing of a FeCoNi-based soft magnetic high-entropy alloy multilayer alternate composite structure, and relates to the technical field of advanced manufacturing of soft magnetic high-entropy alloys. The laser additive manufacturing of the FeCoNi-based soft magnetic high-entropy alloy multi-layer alternate composite structure comprises the steps of respective preparation of three kinds of pre-alloyed powder, respective ball-milling preparation of two kinds of mixed powder, pretreatment of a base plate, argon protection in a forming bin and laser additive manufacturing. The FeCoNi-based soft magnetic high-entropy alloy multi-layer alternate composite structure is obtained through respective preparation of three kinds of pre-alloy powder, respective ball milling preparation of two kinds of mixed powder, pretreatment of a base plate, argon protection in a forming bin and laser additive manufacturing. The preparation method is simple and easy to operate, green and environment-friendly, low in cost, short in process, high in efficiency and beneficial to industrial large-scale production and popularization.

The invention provides a preparation method of an aluminum oxide passivation layer, the aluminum oxide passivation layer and a TBC battery, and relates to the technical field of solar batteries. The preparation method of the aluminum oxide passivation layer comprises the following steps: introducing a mixed gas of chlorine dioxide, hydrogen chloride and hypochlorous acid into the silicon substrate, and carrying out first pretreatment; introducing mixed gas of hydrogen and argon, and carrying out secondary pretreatment; introducing mixed gas of nitrogen, oxygen and water vapor, and carrying out third pretreatment; and after the pretreatment is completed, depositing an aluminum oxide passivation layer on the silicon substrate. According to the preparation method, the problem that in the prior art, aluminum oxide is directly deposited on a silicon substrate after texturing, and the fitting degree of aluminum oxide and the textured surface is poor due to poor uniformity of a natural oxide layer is solved, the passivation performance of the prepared aluminum oxide passivation layer is effectively improved, and therefore the open voltage and the conversion efficiency of a TBC battery prepared from the aluminum oxide passivation layer are remarkably improved.

The invention discloses an additive manufacturing method for in-situ regulation and control of a TiB / TiC titanium-based heterostructure through laser deposition, and belongs to the technical field of composite material preparation. According to the method, laser path planning is carried out based on three-dimensional modeling and layered slicing; the preparation method comprises the following steps: ball-milling and mixing titanium alloy powder, nano boron carbide powder and trace rare earth powder according to a specific proportion, and carrying out vacuum drying; and addition of trace rare earth is beneficial to grain refinement and improvement of reinforcement phase distribution and interface bonding. Under the action of a high-energy laser beam, the mixed powder is fused in an argon protective atmosphere, an in-situ reaction is carried out at the same time, and TiB and TiC reinforced phases are generated; the gradient component design can be implemented in the laser deposition process, specifically, the powder feeding proportion of B4C powder is dynamically controlled through a program, the gradient of the B4C powder is increased from the bottom layer to the surface layer in the direction perpendicular to the substrate, and therefore the gradient heterostructure with the enhanced phase content and performance gradually changed is formed. According to the method, the problems of non-uniform reinforcement phase distribution, obdurability mismatch, plasticity loss and the like in a traditional method are solved, the prepared composite material or gradient component has high strength (the tensile strength reaches 987.66 MPa) and good plasticity and toughness matching, no crack defect exists, and the method is suitable for manufacturing of high-performance parts in the fields of aerospace and high-end machine manufacturing.

The embodiment of the invention discloses a rolling method for effectively relieving anisotropic titanium alloy TC4 thin strip coils and the titanium alloy TC4 thin strip coils, and relates to the technical field of alloy rolling. Comprising the steps that a leading tape is welded to the TC4 titanium alloy coiled material, the TC4 titanium alloy coiled material is placed on an uncoiling machine, and tension is formed on the TC4 titanium alloy coiled material through a tension roller; warm rolling is conducted on the TC4 titanium alloy coiled material at the temperature of 650-750 DEG C, the rolling speed is 500-800 mm / s, the single-pass reduction rate is 10-20%, reciprocating rolling is conducted under the condition that the asynchronous ratio of an upper roller to a lower roller is 1-1.3, and heat preservation is conducted on the TC4 titanium alloy coiled material after each pass of rolling is completed in a furnace for 10-25 min; and the TC4 titanium alloy coiled material rolled to the required thickness is subjected to annealing treatment under the argon protection condition, the annealing treatment temperature ranges from 850 DEG C to 950 DEG C, and the heat preservation time ranges from 20 min to 40 min. The rolling method is high in production efficiency, the difference between the tensile strength of the obtained titanium alloy plate in the direction parallel to the rolling direction and the tensile strength of the obtained titanium alloy plate in the direction perpendicular to the rolling direction is small, and anisotropy of the titanium alloy plate is greatly relieved.

The invention relates to the technical field of preparation of catalysts, in particular to a titanium dioxide modified mesoporous nickel catalyst, a preparation process and application thereof, and the preparation method comprises the following steps: S1, preparing a titanium dioxide modified mesoporous silicon dioxide material; s2, nickel-based acid liquid is added into the titanium dioxide modified mesoporous silicon dioxide material, ultrasonic treatment is performed for 1 h after sufficient mixing, standing is performed for 24 h at the room temperature so as to perform the dipping process, and then the mixture is transferred into a drying oven and dried at the temperature of 110 DEG C; and S3, uniformly grinding the dried solid, putting a sample into a crucible, transferring the sample into a tubular furnace, introducing argon as a protective atmosphere, heating to 550 DEG C at a heating rate of 1 DEG C / min, and roasting for 6 hours to obtain the titanium dioxide modified mesoporous nickel catalyst. The method has relatively high industrial potential, can replace an expensive noble metal catalyst to be used for industrial production, and lays a certain technical foundation for realizing final industrial production of a carbon dioxide methane reforming reaction and integrating the reaction into a green energy storage system.

The invention discloses a cutting and polishing combined machining treatment method suitable for polycrystalline silicon. The method comprises the following steps: step 1, silicon ingot pretreatment: loading historical process data of a silicon ingot in combination with a block chain technology, generating a machining parameter packet, and issuing the machining parameter packet to cutting and polishing equipment to form a machining quantization instruction set; a plasma channel is formed through combination of femtosecond laser focusing and high-frequency electromagnetic field constraint for cutting, annular laser is synchronously used for deep micro-area fusion polishing, and the surface roughness of the cut silicon wafer is reduced by means of argon protection and the surface tension self-leveling effect; 3, polishing: immersing the anode of the silicon wafer into TEMPO / [EMIM] [BF] electrolyte, and regulating and controlling by using pulse voltage; 4, cleaning and drying, wherein megasonic assisted nanobubble ultrapure water is adopted for flushing, and Malangori drying is carried out; and 5, quality control: verifying the surface appearance and the subsurface defect density, and carrying out secondary processing flow on the abnormal silicon wafer.

The invention discloses an all-chemical vapor deposition preparation method of a carbon-carbon heater with the density of 1.6-1.8 g / cm < 3 >, and belongs to the technical field of carbon-carbon heater preparation. The scheme comprises the following steps: 1) preparing a carbon fiber preform with the volume density of 0.5 + / -0.03 g / cm < 3 > by adopting a needling process; 2) taking natural gas as a carbon source, taking low-molecular mixed hydrocarbon gas as auxiliary gas, and performing densification treatment on the carbon fiber preform by adopting an all-chemical vapor deposition method in a nitrogen or argon atmosphere; and (3) carrying out high-temperature graphitization treatment on the densified preform, and sleeving a graphite tool into the heater for fixing in the treatment process, so as to prepare the carbon-carbon heater with the density of 1.6-1.8 g / cm < 3 >. The carbon-carbon heater prepared by the preparation method has the characteristics of stable heat supply, no resistance fluctuation, good corrosion resistance, long service life, short preparation period and the like.

The invention discloses a high-thermal-conductivity Mg-Zn magnesium alloy suitable for rheoforming and a preparation and processing method of the high-thermal-conductivity Mg-Zn magnesium alloy. The alloy comprises the following components in percentage by weight: 1-8% of Zn, 0.5-5% of Cu, 0.2-2% of Sn, 0.2-1% of Sc and the balance of Mg and inevitable impurities. The preparation and processing method comprises the following steps: (1) preparing raw materials according to the composition of the alloy components, and smelting by adopting a medium-frequency induction furnace and taking mixed gas of tetrafluoroethane and argon as a protective atmosphere; (2) mechanical stirring and ultrasonic synergistic stirring are combined to form a uniform melt; (3) preparing semi-solid slurry with a solid phase ratio of 35-50%; (4) forming; (5) cooling and opening the mold; (6) the obtained rheoforming blank is heated to 340-430 DEG C, heat preservation is conducted for 2-12 h, and after heat preservation is finished, quenching is conducted immediately, and cooling is conducted to the room temperature; (7) pre-aging; and (8) aging. By reasonably designing alloy components and optimizing rheoforming parameters, the defects of shrinkage, hot cracking and segregation of a conventional cast Mg-Zn alloy are overcome, and meanwhile, high heat conductivity and mechanical properties are guaranteed.

The preparation method of the Ni-Mn bimetallic oxide modified magnesium-based hydrogen storage composite material comprises the steps that 1, under the protection of an argon atmosphere, pure magnesium powder is placed in a reaction kettle, and a product MgH2 is obtained; step 2, dissolving nickel nitrate hydrate and manganous nitrate hydrate in absolute ethyl alcohol, adding urea into the mixed solution, continuously stirring at room temperature, and then carrying out constant-temperature reaction in a tetrafluoropolyvinyl chloride high-pressure reaction kettle in a drying oven; after the reaction is finished, cooling to room temperature, and carrying out centrifugal washing; supernate obtained after centrifugal washing is poured out, precipitates are reserved and transferred into a vacuum drying box, and vacuum drying is conducted; grinding a block obtained after drying, and transferring the block into a tubular furnace for heat treatment to obtain a bimetallic oxide NiMn2O4; 3, MgH2, NiMn2O4 and stainless steel ball milling beads are weighed and put into a mechanochemical reaction ball milling kettle, intermittent ball milling is conducted for a certain time under the protection of a specific atmosphere, and then a composite sample MgH2-NiMn2O4 is collected. The practical application benefit of the magnesium-based hydrogen storage technology can be greatly improved.

The invention discloses a multi-band enhanced infrared optical comb spectrum rare gas detection system in a hollow cavity of building glass, which is characterized in that a line scanning optical frequency comb light source module and a reflective array module jointly form a virtual enhanced cavity to enhance the optical path of an emitted fan-shaped optical comb light beam so as to improve the detection precision; rapid switching of multi-band gas is achieved through an electric filter wheel according to sequential control so as to detect different gases, gas data in a hollow cavity are collected in real time by combining the high-speed collection capacity of a dual-band area array detection module, and a concentration distribution cloud chart of argon and krypton is rapidly constructed based on a data terminal processing module; the detection efficiency and accuracy of the gas in the glass hollow cavity are greatly improved, the synchronous operation of space scanning and wave band switching is realized, and multi-dimensional data of the concentration, the position and the impurity content of multiple gases can be measured and obtained at a time; a polarization filtering function and a temperature field compensation algorithm are integrated, and the detection precision under outdoor strong light and temperature difference environments is ensured.

The invention belongs to the technical field of lithium ion battery negative electrode material preparation, and relates to a method for preparing a silicon alloy negative electrode based on three-dimensional spin control magnetron co-sputtering, which comprises the following steps: 1, substrate preparation: selecting carbon particles as a negative electrode material substrate; 2, particle three-dimensional spinning suspension: placing the carbon particles in a three-dimensional spinning suspension device, and continuously rolling and rotating in a plurality of space directions in a high vacuum environment; 3, sputtering target material configuration, wherein a silicon target and at least one alloy metal target are arranged in a magnetron co-sputtering cavity; 4, co-sputtering deposition: performing magnetron co-sputtering on the rotating carbon particles in a high-purity argon working atmosphere, and dynamically adjusting the input power of each target to enable a deposition coating to form a gradient composite alloy structure from a rich metal buffer layer to a high-silicon content region to obtain a composite powder material; the high silicon content is guaranteed, meanwhile, a buffer alloy phase and an interface bonding layer are introduced, and the problems of volume expansion and interface stripping in the circulation process are effectively solved.

The invention discloses a regenerated slurry preparation method based on recycled ceramic casting membranes, and belongs to the technical field of ceramic slurry preparation, and the method comprises the following steps: S1, pretreatment, fine crushing and deep extraction, and supercritical CO2 fluid extraction after crushing treatment; s2, thermal degreasing and activation: step-by-step temperature control removal and surface modification step-by-step heating thermal degreasing: in the first stage, the temperature is 150-250 DEG C, and heat preservation is performed for 1-2 hours; in the second stage, the temperature is 300-400 DEG C, and heat preservation is conducted for 0.5 h; s3, a plasma surface activation process: putting the ceramic powder into low-temperature plasma treatment equipment, introducing a mixed gas of argon and oxygen as a working gas, and treating under the action of specific radio frequency or microwave power; s4, slurry reconstruction, precise formula and optimized dispersion gradient powder mixing, wherein regenerated ceramic powder and new ceramic powder are mixed; and constructing a dispersion system: adding a solvent and a composite dispersant, and carrying out dispersion ball milling.

The invention belongs to the technical field of steelmaking, and relates to a method for controlling large-size inclusions in silicon-aluminum deoxidized steel. Converter tapping adopts a silicon-aluminum deoxidation process, after tapping, high-oxidability slag is removed by adopting a slagging-off process, and then high-reducibility premelting refining slag is added for re-slagging, so that the slag (TFe + MnO) at most of the refining moments is maintained within 0.50%; in the refining process, the stirring strength is controlled to control the desulfurization rate of the refining slag within 50%, so that the slag entrapment degree of the refining slag is reduced to the maximum extent; two iron sheets with the thickness being 2 mm are placed on the liquid level of the slag in advance before RH vacuum treatment, it is guaranteed that the slag is prevented from being drawn into the dip pipe in the process that the dip pipe is inserted into the molten steel, soft blowing is conducted for 10-15 min after RH vacuum treatment, then argon is closed, and the molten steel is subjected to standing for 20-30 min. By the adoption of the smelting process, the product rejection rate caused by large-size inclusions is reduced to be within 2%.

The invention relates to a separation method suitable for At-211 produced by a linear accelerator, which comprises the following steps: performing gradient pressing on bismuth powder and a pore forming agent, and sintering on a porous silicon carbide substrate to form a gradient pore bismuth-silicon carbide composite target material; bombarding the gradient pore bismuth-silicon carbide composite target material through a high-energy particle beam generated by a linear accelerator, and carrying out nuclear reaction on bismuth atoms in the target material to generate At-211; the bombarded target material is pretreated through argon plasma; distilling the pretreated target material under pulse carrier gas to realize volatilization separation of At-211, wherein the carrier gas comprises inert gas, reducing gas and organic acid steam; the distilled gas is subjected to gradient condensation through the micro-channel condenser; and adding an extracting agent into the micro-channel condenser, and dissolving the At-211 in the extracting agent to obtain an At-211 solution. The high-flux separation method of At-211 suitable for linear accelerator production, provided by the invention, is stable, efficient and rapid.

The invention belongs to the technical field of titanium welding wire preparation, and discloses a preparation method of a low-cost low-hydrogen titanium welding wire. The method comprises the following steps: preparing a titanium alloy wire rod; under the room temperature condition, multi-pass continuous cold drawing operation is conducted on the titanium alloy wire rod, a plurality of drawing dies are detachably installed on the same continuous drawing machine or a plurality of continuous drawing machines connected in series, so that a wire material continuously passes through the multiple drawing dies at a time to complete multi-pass deformation, and the wire rod is subjected to continuous cold drawing. The pass deformation of the multi-pass continuous cold drawing is designed to be a starting stage, a middle stage and a final stage, and the single-pass deformation of the starting stage and the single-pass deformation of the final stage are smaller than the single-pass deformation of the middle stage; in the middle stage process or after the middle stage process, on-line annealing treatment is carried out on the wire, and on-line annealing is carried out under argon protection; and the wire material subjected to online annealing treatment is subjected to polishing and lower breaking or close arrangement treatment, and a titanium alloy welding wire finished product is obtained. The titanium welding wire prepared through the method is low in hydrogen content, high in preparation efficiency and low in cost.