543 results about "Mischmetal" patented technology

The invention belongs to the technical field of rare earth functional materials, and particularly relates to a rare earth aluminate low-temperature magnetic refrigeration material and a preparation method and application thereof.The preparation method comprises the following steps that 1, rare earth metal nitrate and aluminum nitrate are added into water to be mixed, and a mixed solution is prepared; adding ammonia water into the mixed solution to prepare a precipitate; (2) carrying out annealing treatment on the precipitate to prepare a metal oxide; and (3) calcining the metal oxide to obtain the rare earth aluminate low-temperature magnetic refrigeration material. The rare earth aluminate which has the characteristics of stable structure, low preparation cost, strong mechanical property, high magnetic density and the like and is prepared by adopting a coprecipitation method and combining a high-temperature sintering technology has more excellent magnetocaloric properties in a low-temperature region.

The invention relates to the technical field of rare earth metal electrolysis cathode protection coatings, in particular to a high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating on the surface of a tungsten cathode. A metallurgically bonded strong bonding bottom layer is constructed on a tungsten substrate through surface pretreatment and reactive sintering, then an atmosphere plasma technology is adopted to spray a creep-resistant gradient layer with continuous components to buffer thermal stress, and finally a sol-gel technology is utilized to construct an extremely compact corrosion-resistant surface layer in a superposition mode. The high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating is constructed through a multi-scale and multi-mechanism synergistic effect, the problems that a tungsten cathode coating is insufficient in binding force and poor in thermal shock resistance are fundamentally solved, molten salt permeation can be blocked, and the service life of a tungsten cathode in a severe environment is remarkably prolonged.

The invention relates to a diffusion source for a neodymium-iron-boron magnet and a preparation method and application of the diffusion source. The invention discloses a rare-earth metal catalyst which comprises the following components in percentage by mass: 46%-49% of an organic solvent, 0.1%-2% of an adhesive, 0.1%-5% of a metal oxide and 46%-49% of rare-earth metal, and the melting point of the metal oxide is higher than that of the neodymium-iron-boron magnet. The specific organic solvent, the adhesive, the metal oxide and the rare earth metal are matched for use according to a specific matching relation, so that the diffusion source is more stable, the diffusion effect is improved, and when the magnet attached with the diffusion source is subjected to thermal diffusion treatment, the rare earth metal can be diffused into the magnet so as to improve the coercive force and other properties of the magnet. In the process, the high-melting-point metal oxide is adhered to the surface of the magnet and then serves as a spacer, the adhesion phenomenon of the magnet in the high-temperature sintering diffusion process is reduced or avoided, grain boundary diffusion is further promoted, and the performance of the magnet is improved.

The invention discloses a grain boundary diffusion method of a sintered neodymium-iron-boron magnet. The grain boundary diffusion method comprises the following steps: providing a magnet to be diffused; coating the surface of the magnet to be diffused with coating slurry containing heavy rare earth metal powder, and performing grain boundary diffusion after vacuum heat preservation and dehydrogenation; the vacuum heat preservation dehydrogenation process comprises the steps that under the vacuum condition, the temperature is increased to 220-250 DEG C from the normal temperature after 1-1.5 h, heat preservation is conducted for 2-3 h, then the temperature is increased to 520-560 DEG C after 1-2 h, and heat preservation is conducted for 1-2 h; the grain boundary diffusion process comprises the following steps: heating to 650-750 DEG C after 1-1.5 hours, and preserving heat for 24-30 hours for permeation; and finally, the temperature is increased to 970-1000 DEG C after 1-1.5 h, and heat preservation is conducted for 2-3 h. According to the grain boundary diffusion method, the coercive force of the center part of the sintered neodymium-iron-boron magnet with the high permeation thickness can be remarkably improved, and the intrinsic coercive force gradient difference of the surface layer and the center part of the magnet is reduced.

The invention provides a control operation method for a discharge robot of a rare earth metal electrolytic furnace, which comprises the following steps: the discharge robot acquires the electrolytic state of the electrolytic furnace through a visual sensor, and judges whether the electrolytic state reaches a discharge standard or not; after it is judged that the discharging standard is met, a discharging robot grabs a discharging tool, the discharging tool is preheated, and the discharging tool is moved to the discharging position to prepare for discharging; the discharging robot moves along the planned path, the contact force between the robot and the electrolytic furnace is monitored through a force sensing system, the track of the robot is corrected according to the contact force, and the discharging process is executed; after the discharging process is finished, whether discharging continues or not is judged, and if not, the process is finished. The molten metal discharging standard is judged in real time through the visual sensor, the position of the furnace opening is dynamically calibrated, tool deformation is monitored, flexible control over the tail end is achieved through the force sensor, damage to the furnace body in the digging operation is avoided, manual participation is reduced, and the operation efficiency is greatly improved.

The invention discloses a rare earth metal ceramic and a preparation method thereof, and belongs to the technical field of metal ceramic preparation, the rare earth metal ceramic comprises, by mass, 45-65% of a ceramic phase, 30-50% of a metal binding phase and 3-8% of a rare earth additive, the ceramic phase is composed of one of TiC and WC and one of Al2O3 and ZrO2, the metal binding phase is composed of a Ni-Co alloy and Mo or Cr, and the rare earth additive is composed of one of Al2O3 and ZrO2. The rare earth additive is composed of mixed rare earth oxide and nano rare earth fluoride. The invention further provides a preparation method of the rare earth additive. Through the synergistic effect of oxide grain boundary purification and fluoride liquid phase sintering in a two-phase rare earth system, the problem that traditional single rare earth is difficult to add and disperse is solved, through staged hot pressing sintering, dual optimization of grain refinement and density improvement is achieved, and the high-temperature oxidation resistance and interface bonding strength of metal ceramic are enhanced.

The invention belongs to the technical field of ceramic materials, and relates to high-thermal-conductivity silicon nitride ceramic and a preparation method thereof. The invention discloses a preparation method of high-thermal-conductivity silicon nitride ceramic, which comprises the following steps: (1) uniformly mixing silicon powder and a sintering aid to obtain mixed powder, and carrying out compression molding on the mixed powder to obtain a silicon blank; the sintering aid is a rare earth metal oxide; (2) placing the silicon blank in a nitrogen-containing reducing atmosphere environment, pre-treating at 600-1180 DEG C, heating to 1350-1700 DEG C, and carrying out nitriding treatment to obtain a silicon nitride blank; and (3) placing the silicon nitride green body in an inert atmosphere, and sintering at 1800-2200 DEG C to obtain the silicon nitride ceramic. The pretreatment step is added before the nitridation reaction, so that silicon dioxide impurities wrapped on the surface of the silicon powder are effectively eliminated, and the oxygen content in a liquid phase is reduced on the basis of not reducing the total content of a sintering aid, so that a silicon nitride blank with low lattice oxygen content is more easily prepared, and the heat conductivity of the silicon nitride ceramic is improved.

The invention relates to the technical field of rare earth metal hydrometallurgy, in particular to a rare earth molten salt electrolysis truss type multifunctional metal output system and a control method.The system comprises a main body supporting and moving frame, an integrated function execution module set, a bottom cleaning function module, an electrolytic bath station unit and an intelligent control system; wherein the integrated function execution module group, the bottom cleaning function module, the electrolytic tank station unit and the intelligent control system are respectively arranged in the main body support and motion frame, and the main body support and motion frame is arranged in a gantry truss structure; the four functions of pot lifting, casting, cooling and bottom cleaning in rare earth electrolysis are integrated on the integrated bearing platform of the same gantry truss type rack, and through multi-sensing information fusion and intelligent control, the system can automatically complete the whole process operation of crucible extraction, molten metal casting, cooling forming and electrolytic bath bottom cleaning; and the exposure of workers in high-temperature and high-risk environments is obviously reduced, and the production safety and efficiency are improved.

The invention relates to a dual-rare earth metal catalytic nano material, a diaphragm and a preparation method and application thereof. The preparation method comprises the following steps: carrying out hydrothermal reaction on an aqueous solution containing a carbon source, a hard template, a graphene oxide dispersion liquid, a nitrogen source, a phosphorus source, cerium salt and neodymium salt; then carrying out centrifugal separation to obtain a precipitate, and generating a precursor containing Ce and Nd rare earth bimetallic modified nitrogen and phosphorus doped graphene coated microspheres; and carrying out chemical etching on the precipitate after heat treatment to obtain the dual-rare earth metal catalytic nano material (HCS-coated NPrGO / CeNd). The HCS-coated NPrGO / CeNd can be used as a modification material of a lithium-sulfur battery diaphragm, not only can catalyze the conversion of polysulfide, but also can inhibit the shuttle effect of the polysulfide, so that the lithium-sulfur battery has relatively high capacity under high-rate charge and discharge, and has relatively low capacity fading rate in a high-rate long-cycle test.

The invention provides a reaction state recognition method and monitoring system for a rare earth metal electrolytic furnace. The method comprises the steps that the electrolyzed time of the electrolytic furnace and a plurality of in-furnace flame video frame sequences are obtained; the electrolyzed time is processed, and a time feature vector is generated; extracting local spatial-temporal features of adjacent frames from the plurality of in-furnace flame video frame sequences, and modeling a long-distance time sequence dependency relationship of flame dynamic change according to the spatial-temporal features to obtain spatial-temporal feature vectors; fusing the time feature vector and the space-time feature vector to generate a flame state characterization vector; and predicting the reaction state of the electrolysis process according to the generated flame state characterization vector. According to the invention, the problems of low efficiency, high subjectivity, difficulty in guaranteeing precision and high risk in a severe environment existing in manual observation in the prior art can be solved.

The invention provides a rare earth metal electrolytic furnace discharging robot and a tail end compliance control method and system thereof, and the method comprises the steps: building a rare earth discharging simulation environment for simulating a discharging scene, and building a rare earth discharging control model for simulating the motion trail of a discharging tool through reinforcement learning training based on the simulation environment; contact force sense information between a discharging tool and the electrolytic furnace in the discharging process of the rare earth metal electrolytic furnace is obtained in real time and input into the rare earth discharging control model, and a real-time discharging tool movement track is obtained; and the real-time discharging tool motion trail is input into a discharging robot controller so as to achieve flexible control over the tail end of the discharging robot. According to the robot discharging operation method suitable for the rare earth metal electrolytic furnace, the robot discharging operation method suitable for the rare earth metal electrolytic furnace is achieved on the basis of reinforcement learning and force sensing, the force sensor senses the acting force of a tool and the electrolytic furnace, the working tail end of the rare earth metal electrolytic furnace is controlled through the reinforcement learning method, and then anthropomorphic discharging operation is achieved.

The invention discloses a preparation method and application of a rare earth element doped ruthenium oxide catalyst, and the preparation method comprises the following steps: (1) dissolving a rare earth metal salt, a ruthenium metal salt, dopamine hydrochloride and a Tris-HCl buffer agent in water to obtain a mixed solution, and carrying out in-situ polymerization reaction, solid-liquid separation and drying to obtain a powder precursor; and (2) carrying out high-temperature calcination on the powder precursor obtained in the step (1) to obtain the rare earth doped ruthenium oxide catalyst. Rare earth metal salt and ruthenium salt precursors are dispersed on an in-situ constructed porous carbon substrate, and the rare earth element doped ruthenium oxide nanosheet is generated by oxidation under a high-temperature condition through a self-sacrifice template method. The method has the characteristics of high efficiency and no pollution. The rare earth element doped ruthenium oxide disclosed by the invention is used as a catalyst for the anodic reaction of the acidic electrolyzed water, and shows excellent catalytic activity and wide application prospect.

The invention discloses a rare earth metal electrolysis system and an electrolysis furnace thereof, and relates to the technical field of metallurgy, the rare earth metal electrolysis system is characterized by comprising a potential data acquisition and preprocessing module, a dendritic crystal feature extraction and quantification module, a dendritic crystal identification and intelligent determination module and an inverse pulse control and dynamic regulation module, in the electrolysis process, potential distribution original data of the surface of a rare earth metal cathode are detected and collected in real time, the obtained original data are preprocessed, and a preprocessed potential data set is established based on a time sequence. According to the method, intelligent, real-time and accurate inhibition of dendritic crystals in the rare earth metal electrolysis process is achieved, short circuit, splashing and electrode ablation are effectively prevented, the compactness and purity of metal deposition are improved, the current efficiency is remarkably improved, and compared with a traditional scheme, the method has the advantages of being high in real-time performance, good in inhibition effect, small in interference and high in adaptability, and the method is suitable for popularization and application. And efficient and safe preparation of the rare earth metal is ensured.

The invention provides a conductive paste and a preparation method and application thereof, and the conductive paste comprises 84-91 wt% of a conductive phase, 0.8-5.2 wt% of a glass phase, 4-11 wt% of an organic carrier, 0.1-3 wt% of a dispersant, and the balance of a solvent. The conductive phase comprises 5-60 wt% of nickel alloy powder and 40-95 wt% of silver powder, the nickel alloy powder comprises at least one nickel alloy compound, the nickel alloy compound has a general formula of Ni-alpha-beta-gamma, alpha, beta and gamma are three non-nickel elements which are different from one another, and the sum of the alpha, the beta and the gamma is 100%. The elements alpha, beta and gamma are respectively selected from any one of transition metal, rare earth metal, alkaline earth metal and other non-nickel elements, the mass content of the nickel element is 10-99 wt%, and the sum of the mass content of the elements alpha, beta and gamma is 1-90 wt%. Nickel elements and non-nickel elements alpha, beta and gamma in a proper mass ratio are screened to form nickel alloy powder, so that the physical and chemical properties of the nickel alloy powder are improved, the ratio of the nickel alloy powder for replacing silver powder is increased, the electrical properties in the conductive slurry can be guaranteed, and the cost of the slurry is remarkably reduced.

The invention belongs to the technical field of air purification, and discloses a nitrogen-doped MOF derived hollow porous carbon-rare earth metal doped MnO2-graphene aerogel composite material as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: taking a nitrogen-containing organic heterocyclic ligand, a nitrogen doping agent, a non-noble metal salt compound and chitosan, carrying out a first hydrothermal reaction, carrying out tannic acid etching and first calcination treatment, carrying out MnO2 in-situ growth on the obtained nitrogen-doped MOF derived hollow porous carbon material, and introducing a rare earth metal salt compound to obtain the nitrogen-doped MOF derived hollow porous carbon material. And finally, taking the obtained nitrogen-doped MOF derived hollow porous carbon-rare earth metal doped MnO2 composite material, graphene oxide and a reducing agent to carry out second hydrothermal reaction, ethanol soaking, freezing and freeze-drying treatment to obtain the nitrogen-doped MOF derived hollow porous carbon-rare earth metal doped MnO2 composite material. The nitrogen-doped MOF-derived hollow porous carbon-rare earth metal doped MnO2-graphene aerogel composite material has excellent adsorption and catalytic degradation activity on TVOC (Total Volatile Organic Compounds) such as formaldehyde and the like, and the composite material has a good application prospect in air purification.

The invention relates to the technical field of flux-cored wires, and discloses a high-rust-resistance flux-cored wire preparation method which comprises the following steps of S1, raw material pretreatment, S2, powder adding and forming, S3, surface modification and S4, finished product inspection. Before work is started, a worker prepares raw materials including high-carbon ferrochrome, tungsten carbide, boron carbide, rare-earth metal oxide and ferromolybdenum powder, then grinding equipment is used for grinding the raw materials, then the ground powder is dried for 2-3 hours through equipment at the temperature of 100-150 DEG C, the dryness of the raw materials is guaranteed, and the raw materials are evenly mixed. The method comprises the following steps: firstly, preparing a flux-cored wire, then uniformly stirring by utilizing three-dimensional mixing equipment, and then mixing and proportioning according to different proportions according to a corrosion-resistant flux-cored wire, an acid-base-resistant flux-cored wire and a high-hardness high-temperature-resistant flux-cored wire, so that the welding wires with corresponding properties can be conveniently used according to different environments, and the maximization of the functionality of the welding wire is improved.

The invention relates to the technical field of catalysts, in particular to a composite catalyst for nitrous oxide decomposition and a preparation method thereof.The composite catalyst is of a three-dimensional flower-shaped structure and comprises a composite carrier and active metal loaded on the composite carrier; the composite carrier is composed of a modification additive and a carrier oxide; the performance additive is composed of alkali metal oxide and rare earth metal oxide; the carrier oxide is selected from one of aluminum oxide, titanium dioxide and silicon dioxide; the active metal comprises cobalt oxide and vanadium oxide. The multi-metal catalyst has the advantages that the multi-metal catalyst with a three-dimensional flower-shaped structure is formed by loading cobalt and vanadium active metals on aluminum oxide and under the synergistic effect of alkali metal and rare earth metal, so that the stability and durability of the catalyst in a high-temperature environment are remarkably improved.

The invention discloses a preparation method of a high-strength aluminum oxide ceramic substrate, which comprises the following steps: firstly, modifying aluminum oxide powder by a liquid phase method, and coating a layer of nano magnesium oxide on the surface of the aluminum oxide powder; then carrying out ball milling treatment on the modified powder, rare earth metal oxide, metal oxide, an organic solvent, a binder, a plasticizer and a dispersing agent together, then carrying out defoaming, tape casting, drying and laminated hot pressing to obtain a ceramic green body, and finally carrying out sintering molding in an air atmosphere to obtain the ceramic. The nano magnesium oxide active coating layer constructed in situ and the added exogenous sintering aid act together, so that uniform growth of isometric crystals is promoted, development of a small amount of dominant oriented grains is directionally induced, a composite enhanced microstructure is formed, atomic scale super-uniform distribution and optimal interface combination of the nano magnesium oxide and the exogenous sintering aid are realized, and the nano magnesium oxide / exogenous sintering aid composite material is prepared. The bending strength of the obtained alumina ceramic can reach up to 881 MPa.

The invention provides a treatment method for synergistically enhancing the comprehensive performance of a neodymium-iron-boron magnet, and belongs to the technical field of magnetic materials. According to the method, a heavy rare earth layer and a corrosion-resistant metal layer such as copper, nickel and cobalt for promoting grain boundary diffusion of heavy rare earth are respectively deposited on the surface of the neodymium-iron-boron magnet by adopting a multi-layer electroplating method, the coercivity of the neodymium-iron-boron magnet is enhanced through grain boundary diffusion, and the corrosion resistance of the magnet is enhanced through a nickel-cobalt coating. The treatment method comprises the following steps: carrying out electrochemical deposition on the neodymium-iron-boron magnet in a heavy rare earth metal plating solution, and then respectively electroplating a copper plating layer and a nickel-cobalt plating layer to obtain a heavy rare earth-containing plating layer with strong corrosion resistance and good plating film binding force; the neodymium-iron-boron magnet containing the heavy rare earth coating is subjected to heat treatment, and the coercive force of the magnet is improved through heavy rare earth grain boundary diffusion. The neodymium iron boron grain boundary diffusion process and the surface corrosion prevention process are subjected to integrated treatment, the technological process of high-performance neodymium iron boron industrial preparation is shortened, and the coercive force and the corrosion resistance of the magnet are comprehensively enhanced.

The invention belongs to the technical field of electrolytic baths, and discloses an electrolytic bath for rare earth metal production, the electrolytic bath comprises a bath body and an inner frame fixed in the bath body, an anode mechanism is arranged on the top of the bath body in a lifting manner, side seats are symmetrically arranged on two sides of the bath body, and cathode mechanisms are obliquely arranged on the side seats in a sleeving manner. Through cooperation of the winding mechanism and the cathode mechanism, the cathode mechanism is pulled to slide into the side edge base during electrolysis and acts relatively with the separation assembly in the side edge base, so that metal solids accumulated on the surface of the cathode bar are rapidly separated, and the situation that subsequent accumulation is affected due to the fact that excessive metal is accumulated on the surface of the cathode bar is avoided; and in the actual cleaning process, shutdown is not needed, the cathode mechanisms on the two sides conduct alternate treatment, and after all rare earth metal in a material system is subjected to electrolytic separation, on one hand, rapid separation is completed in the non-shutdown state, on the other hand, metal layers accumulated on the surface can be separated in time, the continuous separation effect is prevented from being affected, and the electrolytic separation effect is comprehensively improved.

The present disclosure describes an eco-friendly bio-based process for effectively recovering a rare earth metal from a rare earth metal source, particularly a low-grade phosphate mineral such as monazite, through solvo-chemical extraction.

The invention belongs to the field of electrochemical energy storage, and discloses an electrode suitable for an organic flow battery and a preparation method of the electrode. The electrode comprises a porous electrode substrate and an amino functional group loaded on the surface of a pore channel, and the electrode substrate is prepared by taking mixed powder of noble metal, rare earth metal and titanium alloy as a raw material. A selective laser melting process is adopted to prepare a porous electrode substrate, and then an electrostatic self-assembly process is adopted to load amino functional groups on the surfaces of pore channels. The electrode has a porous structure with a high specific surface area, and can provide sufficient reaction sites for electrochemical reaction. Meanwhile, the loaded amino functional group can enhance the activity and stability of positive and negative electrode electrochemical substances. The electrode base material comprises a noble metal with catalytic activity and a rare earth metal, and an active rare earth oxide layer doped with a noble metal oxide can be formed on the surface of the electrode after printing. According to the electrode, the energy efficiency of the organic flow battery can be improved, and the stable cycle index and the service life are prolonged on the basis of maintaining the energy efficiency.

The invention discloses a heat-resistant aluminum alloy material and a preparation method thereof, and relates to the technical field of metal material metallurgy, and the heat-resistant aluminum alloy material comprises the following components in parts by weight: 78-85 parts of pure aluminum ingot; 4-6 parts of electrolytic copper blocks; 1.5 to 2.5 parts of magnesium ingot; 0.8 to 1.5 parts of zinc particles; 2 to 3.5 parts of metal nickel powder; 0.1 to 0.3 part of titanium-aluminum alloy; 0.05 to 0.15 part of a zirconium-aluminum alloy; 0.08 to 0.2 part of scandium aluminum alloy; 0.05 to 0.12 part of a cerium rare earth metal block; according to the aluminum alloy material disclosed by the invention, the high-temperature performance of the aluminum alloy material is remarkably improved by optimizing the composition proportion of the alloy. Elements such as copper and nickel are added to form a stable strengthening phase, so that the high-temperature strength and the creep resistance are enhanced; due to introduction of rare earth elements cerium and scandium, crystal grains are refined, and the thermal stability of the material is improved; and through compound addition of zirconium and titanium, grain boundary migration at high temperature is further inhibited, the softening phenomenon is effectively delayed, and the material still keeps excellent mechanical properties and oxidation resistance in a long-term high-temperature environment.

The invention discloses a grain boundary diffusion magnet and a production process thereof, and belongs to the field of neodymium-iron-boron magnets. The grain boundary diffusion magnet comprises a neodymium-iron-boron magnet and a surface coating of the neodymium-iron-boron magnet, the grain boundary diffusion magnet is prepared through a screen printing technology; the surface coating comprises the following raw materials in parts by mass: 100 parts of cerium alloy hydride, 2-4 parts of nano silicon dioxide, 1-3 parts of a dispersing agent, 0.5-2 parts of zirconium propionate and 30-45 parts of a solvent; the cerium alloy hydride includes any one of a cerium-copper alloy hydride, a cerium-aluminum alloy hydride, and a cerium-copper / aluminum alloy hydride. The cerium alloy hydride is adopted to replace heavy rare earth metal, meanwhile, other coating raw materials are matched, the effect of the cerium rare earth element is played, a heavy rare earth-free formula is achieved, a grain boundary structure is optimized, high-reducibility hydrogen can be released in the sintering process of the magnet, the magnet is protected against oxidation, the coercive force of the magnet is improved, and the service life of the magnet is prolonged. And the magnet has good consistency.

The invention discloses an electrolytic furnace system for rare earth metals, comprising: at least one electrolytic furnace device, comprising a coil base assembly with a built-in furnace chamber, the bottom of the furnace chamber being provided with a crucible assembly, the coil base assembly being internally provided with a cooling chamber; the crucible extracting device comprises a multi-axis moving clamping assembly, and the clamping assembly is used for grabbing, taking and placing a crucible assembly; the cathode device comprises a cathode main body as well as a cathode frame and a cathode deflection assembly which are connected to the cathode main body, and the cathode deflection assembly actuates the cathode main body and plans a deflection path passing through the center of the furnace chamber; the anode device comprises anode assemblies, circulating runners are arranged in the anode assemblies, at least one anode assembly is provided with an avoiding notch located in the deflection path, and the avoiding notches contain the cathode body so as to release the furnace chamber; and the dust removal recovery device comprises two housing units, and an exhaust pipe and a cover opening and closing assembly which are connected to a housing main body, and the exhaust pipe is connected with the dust removal module.

The invention discloses a rare earth metal electrolytic reduction method based on a high-frequency switching power supply, and relates to the technical field of rare earth metal electrolytic reduction, and the method comprises the following steps: firstly, in a praseodymium-neodymium electro-deposition process, parameter data in the praseodymium-neodymium electro-deposition process is accurately obtained in real time by using an advanced sensor and detection equipment; and accurate, comprehensive and real-time data support is provided for subsequent intelligent analysis. According to the invention, the problems of stress accumulation, crack propagation and coating stripping caused by fixed preset intermittent closing time in high-current density electrodeposition are solved. Intelligent optimization is realized through real-time data acquisition, deep learning evaluation and dynamic pulse current regulation and control. And when the stress rise is detected, the system adaptively prolongs the intermittent closing time, and reduces the pulse peak current, so that the deposition rate is optimized, and the uniformity and compactness of a plating layer are improved. The method improves the mechanical strength and corrosion resistance of the coating, prolongs the service life of equipment, reduces the energy consumption, and improves the process stability and consistency.

The present invention relates to an adsorbent in which a metal-organic framework is filled within the pore space of a carrier and a method of manufacturing the same, as well as a method of recovering rare earth metals from waste permanent magnets using an adsorbent in which a metal-organic framework is filled within the pore space of a carrier.

The present invention relates to a method for manufacturing a grain boundary diffusion material using a rare earth oxide and a method for manufacturing an R-Fe-B-based permanent magnet using the same, whereby an inexpensive grain boundary diffusion material can be manufactured using a rare earth oxide that is less expensive than an expensive rare earth metal. In addition, an R-Fe-B based permanent magnet in which grain boundary diffusion is performed using a grain boundary diffusion material made of a rare earth oxide can exhibit excellent coercive force.

A Fe—Cr—Ni alloy material that has high strength and reduced strength anisotropy is provided. A Fe—Cr—Ni alloy material according to the present disclosure consists of, by mass %, C: 0.030% or less, Si: 0.01 to 1.00%, Mn: 0.01 to 2.00%, P: 0.030% or less, S: 0.0050% or less, Ni: 29.0 to 36.5%, Cr: 23.0 to 27.5%, Mo: 2.00 to 6.00%, Al: 0.01 to 0.30%, rare earth metal: 0.016 to 0.100%, N: 0.220 to 0.500%, and O: 0.010% or less, with the balance being Fe and impurities, and satisfies Formula (1). In a microstructure, a standard deviation of the grain size numbers of austenite grains is 0.80 or less. The tensile yield strength is 758 MPa or more:3×Ni-2×Cr-150×N<15.(1)where, a content of a corresponding element in percent by mass is substituted for each symbol of an element in Formula (1).

The invention relates to the technical field of rare earth molten salt electrolysis, and discloses a high-purity rare earth metal preparation device and process, the high-purity rare earth metal preparation device comprises a furnace body, a furnace cover is detachably mounted on the furnace body, the center of the furnace cover is provided with a circular material port, and a liftable cathode rod is inserted at the material port; four anode seats are connected to the groove of the furnace cover, and anode assemblies are fixed to the anode seats through U-shaped clamps; the side wall of the furnace cover is connected with a copper bar; a cooling cavity is formed in the side wall of the furnace cover, and the side wall of the furnace cover is connected with a side plate for sealing the cooling cavity; the furnace cover is cooled through a cooling gas path and a cooling water path; a graphite mat felt is placed between the furnace cover and the furnace body, and an inner hole of the graphite mat felt corresponds to the circular material opening; by combining two cooling modes of cooling gas and the cooling water pipe, the temperature of the furnace cover can be effectively reduced, safe and stable operation of equipment is ensured, the service life of the equipment is prolonged, meanwhile, the sealing performance of the furnace cover is prevented from being affected by high-temperature deformation, efficient and high-purity preparation of rare earth metal is achieved, and the product quality and the production safety are improved.