2177 results about "Bismuth" patented technology

The invention provides a green and efficient petroleum passivator and a preparation method thereof, and belongs to the technical field of passivators. Carboxymethyl chitosan, phytic acid and beta-cyclodextrin are coupled to prepare a chitosan-phytic acid-cyclodextrin compound, bismuth, lanthanum, cerium and aluminum are compounded, and the green and efficient petroleum passivator is prepared through tannic acid polymerization modification. The prepared green and efficient petroleum passivator is green, safe, non-toxic and efficient, has good capturing and passivating capacity on ions such as iron, nickel and vanadium, greatly improves the activity of a catalyst, prolongs the service life of the catalyst, and has wide application prospects.

The invention relates to the field of shielding materials, and provides lead-free rubber with ionizing radiation shielding performance and a preparation method thereof, and the lead-free rubber is mainly prepared from barium titanate / boron nitride composite filler, barium tungstate / boron carbide composite filler, tungsten powder, bismuth powder, a rubber matrix and an auxiliary agent according to a proportion. The barium titanate particles are uniformly loaded on the surface of the flaky boron nitride, so that the gamma ray and X ray shielding performance is improved, and meanwhile, the boron nitride provides excellent neutron shielding capability; barium tungstate particles are loaded on the surfaces of the boron carbide nanowires to form a multi-scale shielding network, and the shielding effect of neutrons and ionizing radiation is remarkably enhanced. The rubber matrix endows the material with excellent flexibility and mechanical properties. By scientifically optimizing the component proportion and the preparation process, the problems that a traditional high-density shielding material is prone to agglomeration, poor in flexibility and the like are solved, and the material shows excellent performance in the fields of gamma ray, X ray and neutron shielding and is suitable for the fields of nuclear energy, medical protection, industrial radiation protection and the like.

The invention discloses a sulphide ore flotation method which comprises the following steps: (1) carrying out ore grinding operation on sulphide ore to obtain ore pulp; (2) the pH value of the ore pulp is adjusted, then a pyrite inhibitor, a collecting agent and a foaming agent are sequentially added, flotation operation is conducted, and concentrate and tailings are obtained; the chemical structural formula of the pyrite inhibitor is as shown in formula (I). The flotation method preferably selects the pyrite inhibitor, can be widely applied to inhibition of pyrite, hemite and pyrrhotite in copper-sulfur separation, lead-zinc-sulfur separation and lead-antimony, molybdenum-bismuth and sulfur separation, can generate a strong inhibition effect on the pyrite and the pyrrhotite, has the characteristic of small dosage, is non-toxic and environment-friendly, can replace sodium cyanide for use, and has a wide application prospect. Meanwhile, the problems that the pH value of ore pulp is too high and the separation efficiency is low due to the fact that a large amount of lime is used can be effectively solved, and the grade and flotation recovery rate of target mineral concentrate are improved.

The invention discloses a preparation method of a proton exchange membrane water electrolysis hydrogen production membrane electrode, and belongs to the technical field of proton exchange membranes, a catalyst carrier is prepared, S101, a polyimide membrane is inversely fixed in a magnetron sputtering vacuum coating chamber, a cavity cover of the magnetron sputtering vacuum coating chamber is closed, vacuumizing is performed, and a substrate is heated; and S102, argon is introduced into a cavity of the magnetron sputtering vacuum coating chamber, coating is started, the power of the bismuth metal target is set to be 0.2-0.5 kW, and the deposition time is 60-1800 s. In the invention, the physical vapor deposition method is utilized to load the catalyst on the surface of the metal oxide carrier with high specific surface area and ordered nanostructure, so that the exposure of active sites of the catalyst is increased, the dosage of the noble metal catalyst is reduced, and the bonding strength between the catalyst and the carrier is enhanced; the catalyst is not easy to separate from the surface of the carrier, and large-scale slurry agglomeration is avoided.

The invention relates to the technical field of liquid metal driving equipment, in particular to an annular channel induction type lead-bismuth electromagnetic pump. The lead-bismuth electromagnetic pump comprises an internal stator, an annular flow channel, an external stator, an electromagnetic coil and an electromagnetic pump shell; the outer wall of the annular runner is coated with a protective layer; the protective layer is made of nanometer flexible heat preservation cotton, the thickness of the protective layer ranges from 5 mm to 10 mm, and the protective layer is configured to enable the surface temperature of the protective layer to be controlled to be 100 DEG C or below. Compared with an existing annular channel induction type lead-bismuth electromagnetic pump, the annular channel induction type lead-bismuth electromagnetic pump has the advantages that the nanometer flexible heat preservation cotton with the better heat insulation performance is mainly adopted as the main material of the protection layer, the heat insulation performance of the protection layer is improved by designing the thickness of the protection layer, and the operation temperature range of the annular channel induction type lead-bismuth electromagnetic pump is widened; the problems that an existing annular channel induction type electromagnetic pump is low in running temperature, consequently, running conditions are limited, and efficiency is low are solved.

The invention relates to a bismuth scandate-lead titanate based piezoelectric ceramic material and a preparation method and application thereof, the chemical general formula of the bismuth scandate-lead titanate based piezoelectric ceramic material is (1-y) Bi (Sc (1-x) Mex) O3-yPbTiO3, Me is a late transition metal element, x is 0.03-0.3, and y is 0.63-0.64. Compared with the prior art, the piezoelectric anisotropy and the piezoelectric property of the piezoelectric ceramic are improved by doping the rear transition group metal element Me on the basis of the BiScO3-PbTiO3 binary system piezoelectric ceramic material, the piezoelectric constant d33 is greater than 500pC / N, and the piezoelectric anisotropy d33 / d31 is greater than 3.5.

The invention discloses a high-bismuth slag and precious lead co-processing and efficient recycling method, and belongs to the technical field of non-ferrous metallurgy. High-bismuth slag and precious lead are mixed to obtain impurity-removed precious lead through impurity removal processes such as plug-blow antimony removal, liquation copper removal and tellurium removal by adding agents, and the impurity-removed precious lead is subjected to an oxidation refining process to obtain gold-silver alloy to recover precious metal. Bismuth and lead are similar, silver can be infinitely dissolved in a molten state, and the silver trapping agent has good silver trapping capacity. The high-bismuth slag and the precious lead are mixed to greatly reduce the temperature of a system, volatilization and unknown loss of metal such as Ag are reduced, energy consumption is remarkably reduced, the production cost is reduced, the recovery rate of metal such as bismuth, antimony and silver is increased, and the production efficiency is improved. The obtained molten slag is used for smelting high-bismuth slag, the obtained soot is used for smelting crude antimony, and efficient cyclic utilization of rare and precious metal resources is achieved.

The invention provides a manganese zinc ferrite material as well as a preparation method and application thereof. The manganese zinc ferrite material is prepared from main components and auxiliary components, the main component is prepared from the following components in molar ratio: 51.5 to 53.0 mol percent of ferric oxide, 17.0 to 18.5 mol percent of zinc oxide and 29.0 to 30.0 mol percent of manganese oxide; the auxiliary components comprise the following components according to the total weight of the main components: 200 to 2000 ppm of nano-scale bismuth oxide, 200 to 2000 ppm of nano-scale calcium carbonate, 200 to 2000 ppm of nano-scale molybdenum oxide, and 0 to 4000 ppm of nano-scale cobalt oxide. By optimizing the components and the proportion of the ferrite material, improving the preparation process and organically combining the formula and the process, the ferrite material with high magnetic conductivity, high Curie temperature, wide frequency and wide temperature is finally prepared, and large-scale popularization and application are facilitated.

The invention discloses a method for recovering nearly all elements in low-precious-metal zinc replacement powder, which belongs to the technical field of non-ferrous metal wet smelting, and comprises the following steps: preparing zinc replacement powder, oxidizing and leaching, extracting copper, preparing cuprous chloride, electrodepositing zinc in raffinate, extracting precious metal by using a gold extracting agent, extracting, reducing and smelting to prepare a gold ingot and a silver ingot, and dissolving by using sodium hydroxide. Preparing lead carbonate; carrying out oxidation acid leaching; replacing; and smelting bismuth. According to the technology for achieving recovery and high-value utilization of nearly all elements in the zinc replacement powder under the mild condition, the technology can be carried out at the normal temperature, the high-pressure condition does not need to be provided, the zinc replacement powder is leached through the acid solution, then various valuable metals are selectively extracted from the leaching solution, corresponding downstream products are prepared, and the method is suitable for industrial production. The method realizes value maximization, does not generate secondary pollution, does not introduce fluorine, has low requirements on equipment, is simple in process and easy to operate, and makes up for the defects of the zinc replacement powder treatment process in the prior art.

The invention discloses an antibacterial material rich in a bismuth metal organic framework and a preparation method thereof, the method comprises the following steps: adding an indole monomer and an alcohol monomer into a solvent, and then adding nitrosalicylaldehyde into the solvent to obtain a spiropyran compound; the preparation method comprises the following steps: adding humic acid into a binary solvent consisting of dioxane and butanol to obtain a mixed solution; the ratio of the mass of the humic acid to the volume of the binary solvent is (2-3): (20-40) g / ml; sequentially adding a bismuth source, 2-bromo-5-(trifluoromethyl) pyridine and 4-(trifluoromethyl) phenylboronic acid into the mixed solution to obtain a bismuth metal organic framework; and adding the spiropyran compound into the bismuth metal organic framework to obtain the antibacterial material rich in the bismuth metal organic framework. The antibacterial capability of the antibacterial material is improved.

The invention provides application of a silver-bismuth tungstate catalyst in preparation of methanol from light-driven CO2, and belongs to the technical field of CO2 conversion and reduction. Bismuth tungstate nanosheets, silver salt and water are mixed, the size of silver particles is controlled by adjusting the pH value, the silver-bismuth tungstate catalyst is obtained, and the size of the silver particles is 20-50 nm; silver is evenly distributed on the surface of bismuth tungstate, the obtained silver-bismuth tungstate catalyst is large in specific surface area and high in light response capacity, the silver-bismuth tungstate catalyst can generate a large number of high-energy hot electrons during illumination, in-situ photo-thermal conversion is achieved, no external heat source is needed for heat supply, the photo-thermal effect is enhanced, CO2 conversion is promoted, and the methanol yield is increased.

The invention discloses a manufacturing method of an electromagnetic valve material with high corrosion resistance and easy cutting, which relates to the technical field of stainless steel and mainly comprises the following steps: melting in a heating furnace, AOD (argon oxygen decarburization) refining, LF (ladle furnace) refining, pouring, heat treatment, pretreatment, primary electroplating, secondary electroplating and finished product obtaining. And meanwhile, tin-bismuth alloy with specific content is introduced as a modifier for modification treatment, a slag former is added for refining and slagging-off, and the electromagnetic valve material which is good in corrosion resistance, high in strength and free of cutting is successfully prepared.

The invention provides a high-temperature lead-free piezoelectric ceramic material, and the chemical composition of the high-temperature lead-free piezoelectric ceramic material is Bi (4-x) AxTi (2.97) (B11 / 3B22 / 3) 0.03O12, 0 lt, xlt; a is a doping element of metal cations with the radius close to Bi < 3 + >, B1 is a doping element of low-valence metal cations, B2 is a doping element of high-valence metal cations, and B1 and B2 form non-equivalent doping of the high-valence metal cations and the low-valence metal cations. The mode that A-site bismuth ions and B-site titanium ions in Bi4Ti3O12 are replaced by A / B-site composite doping is adopted, metal cation elements with the radius close to Bi < 3 + > are used for A-site doping, meanwhile, B1 elements and B2 elements are used for B-site non-equivalent doping, and the effect of improving the piezoelectric property is achieved while the high Curie temperature is kept. The invention also provides a preparation method of the high-temperature lead-free piezoelectric ceramic material.

The method comprises the following steps: weighing an oxide precursor of metal indium, an oxide precursor of metal M, an ammonium salt and a lithium salt according to a chemical formula of indium-based halide, fully mixing, and calcining in an inert atmosphere to obtain the indium-based halide solid electrolyte. Forming an indium-based halide solid electrolyte through a solid-phase reaction; wherein M is selected from at least one of magnesium, calcium, strontium, barium, aluminum, gallium, indium, bismuth, scandium, yttrium, zinc, germanium, tin, lanthanum, cerium, samarium, gadolinium, holmium, erbium and ytterbium. The method can greatly simplify the synthesis process, reduce the raw material cost and realize industrial batch preparation.

The invention discloses a liquid metal-hydrogel composite radiation protection material and a preparation method and application thereof.The preparation method comprises the steps that indium, tin and bismuth are sequentially put into a flask from low melting point to high melting point to be mixed, and glycerin is added for immersion; placing the mixture in an argon atmosphere, and stirring by using a heating type magnetic stirrer; taking out the spherical liquid metal particles from the glycerol, and finally washing and drying to obtain liquid metal alloy particles; preparing a PVA (polyvinyl alcohol)-H2O solution with the mass fraction of 15% and a PVA-DMSO (dimethyl sulfoxide) solution with the mass fraction of 15%; and a PVA-H2O solution, a PVA-DMSO solution and the liquid metal alloy particles are stirred and mixed according to the mass ratio, the mixed solution is subjected to ultrasonic treatment and then poured into a mold to be frozen into gel, and the liquid metal-hydrogel composite material is obtained. By combining the advantages of the liquid metal and the hydrogel, excellent biocompatibility, adjustable mechanical property and efficient radiation shielding capability are realized, and the hydrogel can be used as a novel lead-free radiation protection material.

The invention relates, inter alia, to a dispersion electrolyte for the electroplating of particle-containing tin alloy layers. The dispersion electrolyte comprises 2 to 100 g / L tin ions; 1 to 100 g / L ions of a second alloying element selected from copper, silver, bismuth, nickel, cobalt, cadmium, zinc, manganese, and combinations thereof; 1 to 200 g / L at least one type of particle selected from inorganic piezoelectric particles, electrically conductive ceramic particles, and combinations thereof; at least one dispersant selected from anionic dispersants, nonionic dispersants, and combinations thereof; and water. The pH value is 7 or lower. The dispersion electrolyte can be used to electroplaten a particle-containing tin alloy layer onto a metallic or metallized substrate.

The invention provides a method for recovering copper from bismuth concentrate, which comprises the following steps of: adding water into initial bismuth concentrate for size mixing, not additionally adding an agent, and performing agent (sludge) removal on the initial bismuth concentrate by using agents such as a collecting agent and the like remained in front-end flotation operation and adopting a flotation method, so that residues at the bottom of a flotation tank are removed sludge; carrying out copper-bismuth separation roughing on a foam product obtained by flotation, and carrying out copper-bismuth separation fine-coarse separation on the obtained roughed concentrate to obtain fine-coarse separation concentrate and fine-coarse separation tailings; copper concentrate is obtained through two times of closed-circuit concentration of the concentrate and rough-separation concentrate, and tailings are obtained through two times of closed-circuit scavenging of the concentrate and rough-separation tailings. According to the method, for the copper-bismuth-containing concentrate, the measures of flotation reagent (mud) removal, bismuth mineral inhibition through combination of strong base and a high-efficiency environment-friendly bismuth inhibitor CD-B1, enhanced selective recovery of copper minerals and the like are adopted, the copper-bismuth separation flotation environment is remarkably improved, the flotation efficiency of bismuth inhibition and copper flotation is improved, and effective separation and recovery of low-grade copper in the bismuth concentrate are achieved.

A method of producing bismuth oxyhalide quantum dots without heat. The method is a one-pot method that includes synthesizing bismuth oxyhalide quantum dots at room temperature. The method results in quantum dots preferably having bismuth and halide in a molar ratio of 1:1. Further, the bismuth oxyhalide quantum dots produced demonstrate excellent photocatalytic activity in the visible light spectrum and possess improved surface characteristics.

Sensors containing one or more metal oxides as the sensor material are used for detecting pathogen-derived VOCs, e.g., VOCs emitting from infectious wounds. The metal oxides may contain one or more metal elements selected from aluminum, antimony, bismuth, boron, cerium, chromium, cobalt, copper, gold, indium, iridium, iron, lanthanum, lead, manganese, molybdenum, nickel, niobium, osmium, palladium, platinum, rhodium, ruthenium, selenium, silicon, silver, tantalum, tellurium, terbium, tin, titanium, tungsten, vanadium, ytterbium, yttrium, zinc, and zirconium. A sensor device may have one or more sensors, which detects and records a variety of VOCs that are indicative of existence of pathogens, and the pathogens are associated with dieses and / or infections.

The invention provides a lead-bismuth reactor nuclear sampler coating and a preparation method thereof.The preparation method comprises the steps that S3, according to the thickness of a CrAl coating, the bias voltage and target current of multi-arc ion plating equipment are adjusted, the bonding strength of the coating and a base body is optimized, and the target adhesive force reaches the scratch test critical load or above; s4, according to the bonding strength, the nitrogen flow and the air pressure are adjusted, a compact CrAl coating microstructure with the porosity lower than a porosity threshold value is generated, and the quality of the microstructure is detected and verified through a scanning electron microscope; s7, according to the thickness consistency, a screw rod or a pin shaft is selected as a base body part, a CrAl coating is deposited on the surface of the screw rod or the pin shaft to be matched with the sleeve cap, and the gap between the sleeve cap and the shaft part is controlled to be within a gap threshold value; and S10, according to hardness and wear resistance test results, the deposition time and bias voltage are adjusted, the performance of the CrAl coating and the performance of the TiN coating are optimized, and the requirements for long-term corrosion resistance and wear resistance in the lead-bismuth alloy environment are met. According to the invention, excellent performances of long-term corrosion resistance and wear resistance in a high-temperature lead-bismuth environment are realized, and the service life of parts is remarkably prolonged.

The invention discloses a preparation method of an aperture-adjustable and metal-loaded graphite felt flow battery electrode, which comprises the following steps: (1) pretreatment and pore separation: mixing a graphite felt with an alkali solution, magnetically stirring, heating, cooling to room temperature, and treating again to obtain a pore separation material; (2) loading neodymium oxide: dipping the porous material in a solution containing neodymium salt and polyamino acid, heating, cleaning, and drying to obtain a neodymium oxide modified electrode material; (3) loading oxygen-deficient CoMnOx: coating the mixed slurry containing manganese and cobalt on an electrode plate, heating, cleaning and drying to obtain an oxygen-deficient CoMnOx loaded electrode; and (4) carrying out electro-deposition on the electrode loaded with the oxygen defect CoMnOx to obtain the novel bismuth-deposited graphite felt electrode. According to the electrode product obtained through the method, the energy efficiency is improved to 85% or above, and the stable cycle index for maintaining the energy efficiency can exceed 1440 times.

The invention belongs to the technical field of bismuth oxygen selenium nanosheets, and particularly relates to a preparation method of a Bi3O2.5 Se2 nanosheet. According to the preparation method, a chemical vapor deposition method is adopted, Bi2Se3 and KI containing crystal water are respectively used as a precursor and an oxygen supply source to form a mixture, a substrate is placed above the mixture, the mixture is heated under the condition that a carrier gas is introduced for reaction, and the Bi3O2.5 Se2 nanosheet grows on the surface of the substrate to obtain the Bi3O2.5 Se2 nanosheet. According to the preparation method provided by the invention, the uniformity and the crystallization quality of the Bi3O2.5 Se2 nanosheet are remarkably improved, the roughness of a crystal domain combination interface is effectively reduced, and the quality of the crystal domain combination interface is improved; meanwhile, the growth temperature is low, energy consumption and equipment loss are reduced, and the method is more suitable for industrial application.

The invention provides a preparation method of a plate-shaped glassy carbon electrode, which comprises the following steps: curing a resin raw material into a plate-shaped resin block, carbonizing in an inert atmosphere, and respectively introducing a nitrogen source and a boron source for doping operation to obtain a co-doped plate-shaped resin block precursor; placing the co-doped plate-shaped resin block between two porous graphite plates, and carrying out high-temperature treatment to obtain a glassy carbon matrix; and immersing the glassy carbon substrate into the adhesion layer solution to form an adhesion layer, transferring the adhesion layer into a deposition solution which comprises a bismuth-containing solution and a gold-containing solution, forming bismuth-gold nano-dots on the adhesion layer, and washing and drying the bismuth-gold nano-dots to obtain the plate-shaped glassy carbon electrode. Through directional arrangement of crystal orientations, the tantalum carbide coating achieves higher electrical conductivity and thermal conductivity. And the sensitivity and the service life of the plate-shaped glassy carbon electrode are obviously improved and prolonged.

The invention relates to the field of solder materials, and provides a non-ferrous metal solder for low-temperature brazing and application, the solder is composed of carbon-coated copper nanorods, tin-bismuth alloy-coated silver nanoparticles, 2-mercaptobenzimidazole, rosin resin, an organic active agent, a dispersing agent, ionic liquid, hydroxyethyl cellulose, indium nitrate and citric acid. The silver particles are of a core-shell structure and are coated with tin-bismuth alloy layers, and continuous carbon layers are formed on the surfaces of the copper nanorods, so that the conductivity and the interface stability of the solder are effectively improved. The non-ferrous metal solder with excellent conductivity, low melting point and good wettability is prepared through step-by-step mixing, hot press molding and low-temperature heat treatment processes, and is suitable for electronic device packaging, power device connection and flexible circuit interconnection, and the defects of existing solder in the aspects of low-temperature welding and high conductivity are overcome.

A method for preparing bismuth oxide nanowire films by heating in an upside down position includes: washing a substrate, and fixing the substrate to a substrate support in a magnetron sputtering system in a position where an electrically conductive surface of the substrate faces downwards; placing a bismuth target, which is adhered to a copper backing plate, on a sputtering head in the magnetron sputtering system; performing direct current magnetron sputtering to form a bismuth film on the electrically conductive surface of the substrate; and regulating a heating temperature to maintain the bismuth film in a semi-molten state, and providing a predetermined oxygen gas concentration to form the bismuth oxide nanowire film.

A solder composition includes a solder paste including a tin (Sn)-bismuth (Bi) alloy and / or a tin (Sn)-silver (Ag)-copper (Cu) alloy and a plurality of nanoparticles dispersed in the solder paste, wherein each of the nanoparticles includes a core that is spherical, the core includes a metal oxide, and the metal oxide has a density of 7 g / cm3 or more and a melting point of 2000° C. or higher.

The invention belongs to the field of chemical engineering, and relates to a preparation method of a high-chroma bismuth vanadate pigment for a coating, which comprises the following steps: mixing a titanium-based ion sieve with an acidic vanadium leachate, filtering after the reaction is completed to obtain a first filtrate, adding mercaptoacetic acid into the first filtrate, and filtering after the reaction is completed to obtain a second filtrate; preparing a bismuth salt solution containing yttrium ions and zirconium ions, mixing the bismuth salt solution with the second filtrate, adjusting the pH value to be in linear gradient change from acidity to neutrality, heating to a first temperature at a set heating rate, aging, centrifuging and drying to obtain a precursor; and calcining the precursor at a second temperature to obtain the bismuth vanadate pigment. According to the method, the acid vanadium leaching solution is used as a raw material, and the bismuth vanadate pigment with high chromaticity and chemical stability is obtained while the production cost is reduced through an innovative ion sieve purification technology and lattice stabilization doping, so that the method has obvious economic benefits.

The invention relates to a water-based recoatable low-surface-energy coating for a steel structure surface and a preparation method of the water-based recoatable low-surface-energy coating, and belongs to the technical field of coating preparation. The paint is composed of the water-based silica sol, the acrylic resin, the modified anti-rust pigment and the like, the modified anti-rust pigment is prepared by dispersing mica iron oxide, aluminum triphosphate and bismuth molybdate in fluorocarbon resin and methacrylic resin, and the paint has excellent anti-rust performance. The low-surface-energy additive is prepared by mixing raw materials such as perfluoroalkyl ethanol and perfluoroalkyl acrylate, so that the coating is endowed with the characteristic of low surface energy. The preparation method comprises the following steps: mixing and dispersing the deionized water, the dispersing agent, the defoaming agent and the modified anti-rust pigment, adding the water-based silica sol, the acrylic resin, the flatting agent and the low-surface-energy auxiliary agent, and continuously stirring to finally obtain the coating. The coating has the characteristics of excellent rust resistance, low surface energy and recoatability, is suitable for coating the surface of a steel structure, and can improve the corrosion resistance and prolong the service life of the steel structure.

A sensor comprising one or more metal oxides as sensor material is used to detect pathogen-derived VOCs, such as those released from an infected wound. The metal oxides can comprise one or more metal elements selected from aluminum, antimony, bismuth, boron, cerium, chromium, cobalt, copper, gold, indium, iridium, iron, lanthanum, lead, manganese, molybdenum, nickel, niobium, osmium, palladium, platinum, rhodium, ruthenium, selenium, silicon, silver, tantalum, tellurium, terbium, tin, titanium, tungsten, vanadium, ytterbium, yttrium, zinc, and zirconium. The sensor device can have one or more sensors that detect and record various VOCs indicative of the presence of pathogens, which are associated with mortality and / or infection.

The invention relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method of the high-temperature-resistant flux-cored wire. The high-temperature-resistant flux-cored wire containing the rare earth elements comprises a welding wire skin and a flux core. The flux core comprises the following raw materials of dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, ferro-aluminum, potassium cryolite, potassium titanate, sodium titanate, fine iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, nitrided ferrochrome, bismuth oxide, auxiliaries and the balance reduced iron powder. The auxiliary agent is a mixture of a zirconium-iron alloy, a titanium-iron alloy and an aluminum-magnesium alloy. A specific alloy auxiliary is introduced into the flux core to protect stable transition of rare earth yttrium, yttrium and multiple components synergistically optimize the weld joint performance, 253MA heat-resistant steel is matched, slag and electric arc regulation and control components and a reasonable process are matched, and the welding quality of the welding wire is improved.