352 results about "Pure metals" patented technology

The invention discloses a method for preparing an ultrahigh-temperature ceramic coating by an ultrahigh-temperature metal gas source based on a molten salt medium, which comprises the following steps of: mixing low-melting-point salt A, metal fluoride and metal M to obtain a mixture C, putting the mixture C into a first crucible, mixing low-melting-point salt B and metal M to obtain a mixture D, putting the mixture D into a second crucible, putting a carbon base material into a deposition furnace, and performing vacuum drying to obtain the ultrahigh-temperature ceramic coating. Heating the first crucible to melt the mixture C to obtain a melt E, and heating the second crucible to melt the mixture D to obtain a melt F; carrier gas is guided into the first crucible, the carrier gas flow passes through the melt E to form gas flow containing a metal gas source, the gas flow containing the metal gas source is guided into the second crucible, and the gas flow containing the metal gas source is filtered by the melt F in the second crucible to form a pure metal reaction gas source, and finally, a pure metal reaction gas source is introduced into the deposition furnace for deposition of the carbon base material, and the ultra-high-temperature ceramic coating is obtained. The method is easy to operate and low in cost.

The invention belongs to the field of secondary battery manufacturing, and particularly relates to a composite foil current collector welding method.The composite current collector comprises an upper aluminum conducting layer, a middle high-molecular polymer layer and a lower aluminum conducting layer, and the welding method comprises the following steps that S1, micropore machining is carried out on a tab area of the composite current collector, forming a through micropore array; s2, laying a first pure metal foil on the upper surface of the tab area, and laying a second pure metal foil on the lower surface of the tab area; and S3, welding the tab area on which the pure metal foil is laid, so that the first pure metal foil, the upper aluminum conductive layer, the lower aluminum conductive layer and the second pure metal foil form through metallurgical bonding at the position of the micropore. According to the composite foil current collector welding method, ultrasonic energy is highly concentrated on a metal interface at the edge of a micropore, local metallurgical connection is achieved, overall heat input is low, hot melting and carbonization of a middle high-molecular polymer layer are effectively avoided, and an ultrathin metal layer is protected against heat damage.

The present disclosure relates to the field of the preparation of high purity sodium and the safe treatment of sodium calcium slag, and discloses a method and apparatus for sodium slag recovery by using gravity separation—controllable combustion—alkaline liquor leaching process for the preparation of high purity sodium and safe treatment of sodium calcium slag. The method comprises the following steps: (1) subjecting a liquid sodium slag to a gravity stratification to obtain pure metallic sodium and high calcium content sodium slag; (2) roasting the high calcium content sodium slag to obtain a roasting slag; and (3) leaching the roasting slag by using an alkaline liquor to obtain the sodium hydroxide solution and calcium hydroxide. The method and apparatus provided by the present disclosure have advantages including high efficiency separation of sodium and calcium, saving separation time, safe and controllable production process, and continuous production process, thereby providing a safe and efficient method for the preparation of high purity sodium and safe treatment of new sodium calcium slag generated by the method, allowing continuous production of high purity sodium and safe recycle of new sodium calcium slag.

The invention relates to the field of semiconductor single crystal material preparation processes, and discloses a process method for synergistically recovering indium and germanium from zinc leaching residues and preparing single crystals, which comprises the following steps: mixing a crude extract and a liquid metal solvent, carrying out low-temperature extraction to obtain mixed slurry, carrying out thermal-phase in-situ purification on the mixed slurry, separating a liquid-solid phase by utilizing thermal gradient migration, and carrying out solid-liquid separation on the separated liquid-solid phase. Performing directional solidification and purification to obtain an ultra-clean growth solution; analyzing the indium-germanium proportion of the ultra-clean growth solution, and supplementing pure metal for chemical component calibration; the ultra-clean growth solution with accurate components is used for liquid phase epitaxial growth to obtain single crystals, the thermodynamic principle is used for replacing physical filtration, so that particle heterogeneous nucleation centers are removed, the influence of chemical fluctuation of raw materials is eliminated through a built-in calibration link, and the physically pure growth solution with accurate components is prepared; the industrial preparation of the high-quality single crystal is ensured.

The invention discloses a multi-scale research method for improving the separation efficiency of impurities in an ultra-pure metal system. The multi-scale research method comprises the following steps that tellurium crystals are prepared through a zone melting method, and purity and crystal face orientation analysis is conducted; simulation analysis is carried out in combination with experimental data, firstly, phase field simulation is used for analyzing conversion of an interface structure and grain competition-driven orientation in the solidification process, then the density functional theory is used for calculating and analyzing adsorption energy of solid phases on different crystal faces at the solid-liquid interface to impurity atoms, and the structure-activity relationship between crystal face orientation and impurity separation efficiency is obtained. Finally, the crystal face and the preferred orientation degree of the tellurium crystal are regulated and controlled through a Bridgman method, and the impurity separation efficiency is improved. By means of the mode, the key factors influencing trace impurity atom separation can be obtained, the universal method for improving the impurity separation efficiency in the ultra-pure metal system is obtained, and development of the non-ferrous metal metallurgy field is promoted.

Provided herein are low resistance metallization stack structures for 3D-NAND applications and related methods of fabrication. In some embodiments, thin metal oxynitride nucleation layers are deposited on dielectric material followed by deposition of a pure metal conductor using process conditions that increase non-molybdenum component element content at the oxynitride-dielectric interface. Certain embodiments of the methods described below convert less than all of the metal oxynitride nucleation layer to a pure metal layer, further lowering the resistivity.

The invention belongs to the technical field of wrought aluminum alloy material processing, and relates to a high-strength high-conductivity 7050 aluminum alloy and a short-process preparation process thereof.The process comprises the steps that pure metal aluminum, pure metal zinc, pure metal magnesium, pure metal copper and pure aluminum-zirconium intermediate alloy serve as raw materials, 6.1-6.3 wt.% of Zn, 2.3-2.5 wt.% of Mg, 2.4-2.6 wt.% of Cu and 0.12-0.14 wt.% of Zr are matched, smelting, melt refining and refining treatment are carried out, and then the high-strength high-conductivity 7050 aluminum alloy is obtained; sub-rapid solidification of a melt is realized by adopting water-cooling copper mold casting, as-cast grains are remarkably refined, and formation of a coarse second phase is inhibited; traditional multi-stage annealing is replaced with single-stage homogenizing annealing, so that the residual phase area percentage is smaller than or equal to 1.0%, and the maximum residual phase size lt is achieved; 30 [mu] m; and by combining multi-pass hot rolling and solid solution-aging cooperative regulation and control, the problem of intensity-conductivity inversion caused by second phase distribution and grain boundary segregation is solved. Compared with a traditional process, the homogenization time is shortened by 50% or above, the total technological process is reduced by 30%-40%, and finally the high-performance 7050 aluminum alloy with the tensile strength larger than or equal to 650 MPa and the electric conductivity larger than or equal to 40% IACS is obtained.

A device and method for preparing high-purity metals by vacuum distillation and bidirectional step condensation, the device comprising an atmosphere control device, a vacuum distillation device, a charging device, an intelligent control device, and an exhaust gas treatment device. The atmosphere control device comprises a nitrogen bottle and a control valve located above the bottle mouth for controlling the opening and closing of the nitrogen bottle. The vacuum distillation device comprises a vacuum distillation device and a vacuum pump connected to the vacuum distillation device via a pipeline. The charging device is located in the middle of the vacuum distillation device, and the intelligent control device is connected to the vacuum distillation device. The exhaust gas treatment device comprises an impurity removal device. The vacuum distillation device is provided with a plurality of heaters, which are arranged in parallel along the length direction of the charging device and the condensation zone on both sides of the vacuum distillation device. The present invention also includes a method for preparing high-purity metals using the device. The device of the present invention has a simple structure, is not restricted by the gravity field, is convenient for sampling, and has high impurity removal efficiency.

The invention discloses a control method for optimizing a solid / liquid interface of a solution in indium Czochralski purification based on numerical simulation, belongs to the technical field of preparation of high-purity metal materials, and obtains a process regulation and control scheme for stabilizing the solid / liquid interface of the solution through an external magnetic field and establishment of a mapping relation of process parameters-interface data-impurity concentration based on multi-physics field numerical simulation. The method comprises the following steps: acquiring original physical property data of the czochralski furnace and indium, calculating a geometric model, performing mesh generation, and establishing a mathematical model; based on historical experimental data, boundary conditions are set, and the key processes of indium czochralski purification seeding, shouldering and equal diameter are simulated; coupling multiple physical fields, and analyzing the change of a solid / liquid interface of the solution in the direct pulling process; and on the basis of a numerical simulation result, a deep reinforcement learning model is constructed, a mapping relation among process parameters, interface data and impurity concentration is established, 'prediction-verification-optimization 'closed-loop iteration of the process is realized, and collaborative regulation process parameters for stably preparing 8N high-purity indium are obtained.

The invention discloses a preparation method of an R-T-B rare earth permanent magnet, and the method comprises the following steps: 1, coating with a coating: coating an S1 region on the surface of a permanent magnet substrate with a first coating to obtain a first coating region S1, and coating an S2 region on the surface of the permanent magnet substrate with a second coating to obtain a second coating region S2; the first coating area S1 is smaller than or equal to S, the second coating area S2 is smaller than or equal to S, S is the magnet surface area where the coating face is located, and the first coating and the second coating are composed of one or more components of pure metal containing Dy and / or Tb, hydride, fluoride and oxide; and 2, carrying out grain boundary diffusion treatment on the magnet obtained in the step 1, and carrying out aging treatment after cooling to obtain the R-T-B rare earth permanent magnet. The method has the advantages that diffusion of heavy rare earth in a grain main phase can be reduced, the use amount of the heavy rare earth is reduced, and the coercive force of a selected area can be further enhanced.

The invention discloses a vacuum induction furnace smelting process for magnesium microalloying of H13 hot work die steel, and belongs to the technical field of ferrous metallurgy. According to the method, the contents of Al2O3, MgAl2O4 and MgO inclusions of the H13 hot work die steel with different Mg contents at different temperatures are calculated through software. And determining an interval in which the content of the MgAl2O4 inclusions accounts for the maximum so as to determine the optimal content of the added Mg. A vacuum induction furnace is adopted, after pure metal materials are melted and refined through operations such as vacuumizing, water feeding and electrifying, alloy materials are added for alloying, the content of Mg is controlled, and finally the alloy materials are cast in a preheated mold for casting. According to the method, Al2O3 in molten steel can be effectively converted into MgAl2O4, the solidification structure and liquation carbide of the H13 hot work die steel are effectively refined, and the segregation behavior of alloy elements is reduced.

The invention discloses an alloy aluminum bar containing rare elements and a preparation technology of the alloy aluminum bar. The alloy aluminum bar comprises, by mass, 1.5%-3.3% of Mg, 0.7%-1.1% of Si, 1.0%-1.7% of Cu, 0.15%-0.3% of Y, 0.07%-0.1% of Er, 0.05%-0.11% of Gd, 0.07%-0.24% of La, 0.08%-0.15% of Zr, 0.07%-0.12% of Ti, 0.05%-0.1% of Sc, smaller than or equal to 0.1% of Fe, 0.35%-0.7% of Mn, 0.2%-0.6% of Ni, smaller than or equal to 0.5% of total impurities and the balance aluminum. The preparation process comprises the following steps: burdening: accurately weighing a high-purity aluminum ingot, Al-Y, Al-Zr, Al-Ti intermediate alloy and pure metal according to the components; smelting: melting at 720-750 DEG C, preserving heat, and protecting by argon; cooling to 740-720 DEG C, and adding an intermediate alloy; a refining agent is added for degassing and deslagging, and slagging-off is conducted after standing is conducted for 30 min; casting: the temperature is 720-740 DEG C, the casting speed is 120-200mm / min, the strength of cooling water is 0.06-0.15 MPa, the water temperature is 10-30 DEG C, and online degassing is performed outside the furnace so that the hydrogen content is less than or equal to 0.15 cm / 100g Al; through scientific proportioning of conventional alloy elements such as Mg, Si, Cu and Mn and various rare elements such as Y, Er, Gd, La, Sc, Zr and Ti, the synergistic strengthening effect of the conventional elements and the rare elements is achieved, and the performance bottleneck of a traditional aluminum alloy is effectively broken through.

The invention provides a preparation method of high-purity antimony, and belongs to the technical field of high-purity metal materials. The preparation method of the high-purity antimony comprises the following steps that a crude antimony raw material is added into a cylindrical container, then the cylindrical container is placed in an induction heating coil, and under the conditions that the induction power is 30-150 kW, the change frequency is 2-15 kHz and the rotating eddy current is in the clockwise direction, the crude antimony raw material is subjected to induction melting, and gathering the impurities at the edge, parallel to the section circle of the cylindrical container, of the molten antimony, cooling, and removing the impurities to obtain the high-purity antimony. According to the preparation method of the high-purity antimony, the purity of the crude antimony raw material can be rapidly and effectively improved.

The invention relates to a forming method for composite electroplating of an MEMS (Micro Electro Mechanical System) probe. Structural patterns of a needle tip or / and a needle body are / is photoetched through a micro-electro-mechanical process, the needle tip or / and the needle body is / are formed through electroplating of a composite plating solution after pretreatment, the composite plating solution is obtained by mixing a metal base solution and a turbid liquid, the metal base solution is a nickel base solution and / or a rhodium base solution, and the turbid liquid is a nickel base solution and / or a rhodium base solution. The suspension is formed by suspending nano-powder in water through a dispersing agent. Compared with the prior art, the technology provided by the invention has the following advantages that the MEMS process technology is combined with the composite plating solution to be used for various probe structures, and the performance of the prepared material is greatly improved compared with that of a pure metal coating; the composite plating solution prepared from the plating solution and the second-phase particles is high in stability, and the electroplating process is easy to operate; the nickel-based composite plating solution can be used for obtaining a main body material with higher hardness, better wear resistance and better flexural property; the rhodium-based composite plating solution is used for preparing a needle point material, has higher hardness and wear resistance, and improves the brittle fracture problem.

The application provides a high-throughput high-entropy alloy component design method, comprising the following steps: S1) preparing an initial sample of pure metal or alloy; S2) preparing a master alloy ingot according to the high-entropy alloy component; S3) assembling the initial sample at the bottom of a mold shell, fixing the mold shell on a directional solidification furnace pulling device, and exposing a part of the initial sample from the liquid level of a cooling tank, and immersing the remaining part into the cooling liquid in the cooling tank; S4) assembling the master alloy ingot on the upper part of an induction dripping system of the directional solidification furnace, and turning on the heating power supply of the directional solidification furnace; S5) turning on the induction dripping system until the master alloy ingot is melted and dripped into the mold shell, and then cooling and solidifying after heat preservation. The high-throughput sample component prepared by the method provided in the application is uniform and linear, and the component screening precision is higher; the high-throughput sample with single-element or multi-element coupling change can be efficiently prepared, the performance data reliability is higher, and the industrial application potential of the alloy is greater.

The invention relates to a method for measuring the thickness of an intermetallic compound of a copper-clad aluminum composite material, and relates to the field of metal material analys.The thickness measuring method comprises the steps that an intermetallic compound sample at the composite interface of a copper-clad aluminum sample is taken, the hardness of the interface is obtained through a nanoindenter, and main constituent compounds of the interface are confirmed through hardness comparison; the method comprises the following steps: cutting a copper-clad aluminum sample to obtain a first sample which contains a composite interface and has a regular shape, testing to obtain the resistance of the first sample, obtaining a first mathematical relationship according to a resistance superposition model, cutting the first sample into a second sample with equal length, and weighing to obtain a second mathematical relationship according to a mass superposition model; and obtaining the thickness of the intermetallic compound according to the two mathematical relationships. According to the method, the characteristic that the electrical property of the intermetallic compound is poor is utilized, the electrical property of the composite material is tested, the electrical property difference between the composite material and pure metal is compared, the proportion of the intermetallic compound is quantitatively given through joint calculation, and the thickness of the intermetallic compound can be rapidly measured.

This invention relates to a cold cathode X-ray inspection system and method with eddy current detection function, used for defect detection and evaluation of composite materials with conductive and magnetic panels and pure metal materials of a certain thickness. The inspection system includes a cold cathode X-ray instrument, a DR receiving panel, and a laptop computer. In addition to the cold cathode X-ray detection board, the mainboard of the cold cathode X-ray instrument also has an eddy current detection board. The eddy current detection board and the cold cathode X-ray detection board share the built-in power supply unit and operation unit of the cold cathode X-ray instrument. A transparent flexible panel is added to the photosensitive element layer of the DR receiving panel. A transparent detection coil made of metal coating technology with an array arrangement is set on the transparent flexible panel. During the inspection, the cold cathode X-ray image of the inspected workpiece and the eddy current detection signal on the surface of the inspected workpiece can be acquired simultaneously. By comparing, fusing, and analyzing the two image signals, a complete and accurate inspection result is obtained.

The invention relates to a method for preparing low-valence titanium chloride from gaseous TiCl4 through a molten salt method, and belongs to the technical field of titanium metallurgy. The low-valence titanium chloride preparation device comprises a TiCl4 gasification unit, an argon current-carrying conveying unit and a molten salt reaction unit, crude titanium and chloride molten salt are added into the molten salt reaction unit, the chloride molten salt is heated to 500-800 DEG C through the molten salt reaction unit, liquid molten salt is kept, and the liquid molten salt is located above a crude titanium solid phase; the method comprises the following steps: heating liquid TiCl4 to the temperature of 150-200 DEG C through a TiCl4 gasification unit, and gasifying the liquid TiCl4 into TiCl4 steam; tiCl4 steam is introduced into liquid molten salt of the molten salt reaction unit at a constant speed through argon flow of the argon current-carrying conveying unit, a gas-solid-liquid three-phase interface reaction system is constructed in a normal-pressure inert atmosphere, and the TiCl4 steam and crude titanium in the liquid molten salt are subjected to a multi-phase reduction reaction at the temperature of 500-800 DEG C to obtain low-valence titanium chlorides (TiCl3 and TiCl2). The method is suitable for providing a stable and efficient low-valence titanium chloride raw material for preparing high-purity metal titanium through a fused salt electrolysis method.

The utility model belongs to the technical field of counter-pressure casting, and particularly relates to a counter-pressure casting riser tube electromagnetic induction filtering device and system, which comprises a middle tube, an induction heating coil, a heating coil embedding block, a filtering medium and a riser tube, the filtering medium is arranged inside the riser tube, and the induction heating coil and the heating coil embedding block are arranged outside the riser tube. And the intermediate pipe covers the induction heating coil embedded block. Through structural optimization of the riser tube, impurities at the bottom of the molten metal container can be prevented from being involved into pure molten metal in the molten metal suction process, and filtering of original impurities is guaranteed to the maximum extent. Through the synergistic effect of electromagnetic induction and the magnetic filtering medium, magnetic and non-magnetic impurities in molten metal can be effectively filtered, the purity of the molten metal is remarkably improved, defects in a casting are reduced, and the mechanical property and reliability of the casting are improved.

The invention discloses a light durable liquid cooling plate based on an aluminum foil material and a manufacturing process thereof. The manufacturing process comprises the steps of preparing a material sheet, forming a runner through cold stamping, folding and sealing and the like. The liquid cooling plate is made of a three-layer composite material composed of polypropylene (PP), aluminum foil and nylon, and compared with a traditional pure metal liquid cooling plate, the liquid cooling plate has the advantages of being soft in attachment, good in surface deformation and free of being coated with heat dissipation glue, and the heat dissipation effect is remarkably optimized. The PP layer is resistant to bacteria and corrosion, so that the service life of the liquid cooling plate is prolonged to 10-15 years, and the problems that a traditional metal plate is prone to corrosion, liquid leakage and biological growth are solved. The design is light in weight, low in cost, particularly suitable for mobile electronic equipment such as aircrafts and electric automobiles, high in automation degree of the production process and suitable for batch manufacturing. Due to the ductility and convenient sealing characteristic of the composite material, the liquid cooling plate is more stable in structure and reliable in packaging, and the modern requirements for high efficiency, light weight, durability and heat dissipation are fully met.

The application provides a purification method of crude tellurium, and belongs to the field of high-purity metal preparation. The application provides a purification method of crude tellurium, which comprises the following steps: rotating crystallization is carried out by immersing a crystallizer into a tellurium melt obtained by melting the crude tellurium; and the temperature of the crystallizer is lower than the temperature of the tellurium melt during the rotating crystallization. The interface shear force generated by the rotating of the tellurium melt realizes the thinning of the solute boundary layer of the liquid-solid interface, and the impurities are forced to be removed from the boundary layer, so that high-purity tellurium is crystallized; the rotation of the crucible promotes the increase of the temperature gradient of the liquid phase zone near the liquid-solid interface, and the increase of the temperature gradient makes the crystallization faster, so that the purification efficiency is improved. The results of the examples show that the purification method provided by the application can purify 4N tellurium to 99.9999% in one step. Moreover, the process flow of the application is simple, and no waste gas, waste water and waste residue are generated.

The invention belongs to the technical field of aluminum alloy material design and preparation, and particularly relates to an Al-Bi alloy and a preparation method and application thereof. The aluminum alloy material comprises the following components in percentage by weight: 0.5%-3.5% of Bi, 0.02%-0.3% of Si, 0.05%-1% of Fe, less than or equal to 0.05% of impurities and the balance of aluminum, the content of the iron is greater than that of the silicon. The solid solubility of Bi in aluminum is extremely low and is as low as 1t at room temperature; in the solidification process, most Bi is separated out in a pure metal eutectic phase mode, the scattering effect of Bi on lattice electrons is small, and then it is guaranteed that the conductivity of the alloy is maintained at the high level; meanwhile, Bi can be used as a strengthening phase of an Al matrix, and through cold deformation, the hardness of the Al-Bi alloy is higher than that of pure Al, so that the Al-Bi alloy has high conductivity and high strength at the same time.

The application discloses a rare earth micro-alloyed Al-Fe-Si-based multipurpose aluminum alloy wire and a preparation method thereof, and relates to the technical field of metal material processing and manufacturing. The wire composition formula is Al-xFe-ySi-zRE-mCu-nMg-pZn, wherein 0.3<=x<=0.55, 0.15<=y<=0.3, 0.1<=z<=0.35, m<=0.2, n<=0.2, p<=0.2, and x>=y. The wire is prepared from pure aluminum and intermediate alloy or pure metal as raw materials through a 'cross deformation two-stage aging' and 'twisting-extruding-drawing composite cold deformation' process method matched with the alloy formula. The application can develop Al-Fe-Si-based aluminum alloy wires with different characteristics, which are respectively suitable for high-conductivity-high-strength, high-conductivity-high-plasticity and high-conductivity-high-strength-high-plasticity application scenarios.

This utility model discloses a modular electrolytic reaction tank for preparing high-purity metallic magnesium, belonging to the field of metallic magnesium reaction tanks. It includes a reaction tank body, with a cover plate fixedly connected to the upper surface of the body by multiple bolts. A conveying pipe is fixedly connected to the left side of the upper surface of the cover plate. A collection box is fixedly connected to the right side of the lower inner surface of the reaction tank body. A through-type collection port is opened on the upper left side of the inside of the collection box. This utility model achieves efficient and rapid separation through the unique structure of the collection box and related components. When the liquid magnesium reaches a certain thickness, the level gauge detects a signal, the electric push rod is activated, pushing the sliding plate two. Through the gas box and gas delivery hole, the sliding plate one moves the baffle one upward, opening the collection port. Liquid magnesium quickly flows into the collection box, greatly reducing the residence time of liquid magnesium in the reaction tank body, effectively reducing impurity dissolution, and improving the purity of metallic magnesium and product quality.

A method and apparatus for regenerative hydrogen separation at high temperatures for production of pure hydrogen gas. Pure metals and metallic alloys are used at high temperatures to maximize the catalytic effect for hydrogen dissociation, hydrogen diffusion and hydrogen sorption capacity. Metallic materials are used that can selectively sorb hydrogen at high temperatures. These materials are integrated into equipment designs and process configurations to process a stream of hot mixed process gases to produce a stream of pure hydrogen product at the desired system temperature. The invention can be used to enhance the performance of existing plants such as steam methane reforming applications by increasing the conversion to hydrogen, eliminating or reducing the number of shift converters, providing pure hydrogen product, and enhancing the overall energy efficiency. In some embodiments, the hydrogen sorption system is built inside a hydrogen production reactor, enhancing the chemical equilibrium inside the reactor, to achieve higher conversion and hydrogen yields.

The invention provides a thermocouple verification furnace which is a vertical verification furnace and comprises a furnace core assembly, a one-way atmosphere protection device and a thermocouple positioning device. Through the design of the heat insulation layer, the highest temperature can reach 1800 DEG C, the upper limit of 1600 DEG C of a traditional high-temperature verification furnace is broken through, platinum and other high-melting-point materials can be melted, verification is carried out when the temperature exceeds 1600 DEG C, calibration is carried out through a fuse method by utilizing pure metal materials, and the calibration precision is improved; a vertical furnace is adopted to solve the problem of high-temperature deformation in the gravity direction of a furnace tube of a common horizontal thermocouple verification furnace; in the verification process, the whole process is protected by using the protective gas, so that the detected thermocouple is prevented from being oxidized under the high-temperature verification condition.

The invention discloses a preparation method of a novel high-performance Ti-Zr-Mo-Sn super-elastic beta titanium alloy. The invention provides a brand-new super-elastic beta titanium alloy system, namely Ti-Zr-Mo-Sn, and preparation of the novel titanium alloy can be achieved by combining the processes of electric arc melting, cold rolling, recrystallization treatment and the like. The preparation method comprises the following specific steps: 1) weighing pure metals such as titanium, zirconium, molybdenum and tin, and preparing a button cast ingot; 2) preparing a standard tensile sample; 3) recrystallization annealing treatment; and 4) mechanical property detection. The problems that NiTi alloy causes allergy and Ti-Nb-based super-elastic beta titanium alloy is poor in mechanical property are solved, and further development of the high-performance biomedical super-elastic beta titanium alloy is promoted.

The invention relates to a method for preparing high-purity germanium through reduction of hydrogen and germanium tetrachloride, and belongs to the technical field of high-purity metal material preparation. The method comprises the following steps: introducing vaporized germanium tetrachloride and preheated hydrogen from the top of a vertical quartz reaction tube, and mixing; the mixed gas downwards passes through a reaction zone, a concentric quartz ring tube bundle is arranged in the reaction zone, and the reaction zone is divided into an upper high-temperature reaction zone (1000-1150 DEG C), a middle medium-temperature deposition zone (600-850 DEG C) and a lower high-temperature melting zone (940-1000 DEG C) in the gas flow direction; gaseous germanium is condensed in the ring tube bundle in the middle deposition area to form solid germanium, and the solid germanium grows downwards to the lower melting area to be melted into liquid to drop and be collected; and treating the tail gas to recover germanium tetrachloride and hydrogen for recycling. Through the design of the annular tube bundle carrier and the temperature field, the deposition-melting dynamic process is achieved, reaction balance is broken, and the conversion per pass of germanium tetrachloride is increased to 70% or above.

The present invention relates to a method for purifying rhodium from a complex rhodium leachate, belonging to the technical field of precious metal refining and purification. The method comprises adding a reducing agent to the rhodium leachate to obtain a RhCl3 primary purified solution and an insoluble residue; simultaneously adding a sulfite and an ammonium salt to the RhCl3 primary purified solution to precipitate rhodium in the form of (NH4)3Rh(SO3)3; adding hydrochloric acid to the (NH4)3Rh(SO3)3 precipitate residue and heating and boiling it to dissolve the rhodium in the form of RhCl3 into the solution and allowing the SO3 in the solution to dissolve. 2‑ The reaction is then removed as SO2 to obtain a secondary purified RhCl3 solution; a strong oxidant is added to the secondary purified RhCl3 solution for oxidation to obtain RhCl4; an alkali is added to the RhCl4 solution to adjust the pH and the solution is boiled to obtain a RhO2·2H2O precipitate; the RhO2·2H2O precipitate is sequentially slurried in pure water, reduced with hydrazine hydrate, calcined, and reduced with hydrogen to obtain high-purity metallic rhodium. The method of the present invention can produce high-purity metallic rhodium with a purity greater than 99.95%, and a direct yield of rhodium greater than 97%.

The invention discloses an impurity separation device and an impurity separation method based on mass-to-charge ratio difference, and relates to the technical field of metallurgical separation, metal purification and thin film deposition, the impurity separation device comprises: a vacuum system for providing a vacuum or inert gas environment; the excitation device is used for exciting the to-be-purified raw material and generating a mixed ion beam, and the excitation device is provided with an ion beam outlet; the separation device is connected with the vacuum system, a single electric field area and an electromagnetic composite field area are arranged in the separation device side by side, and the mixed ion beam enters the single electric field area through the ion beam outlet to be accelerated and then enters the electromagnetic composite field area to generate deflection and separation to form a plurality of single-component ion beams; any single-component ion beam returns to the single electric field area after deflection and is decelerated; and the collecting device is arranged in the separating device and used for collecting the decelerated single-component ion beams, impurity elements can be separated through a single method, the separating process is simple, efficiency is high, and preparation of ultra-pure metal and alloy materials is achieved.