761 results about "Iron oxide" patented technology

The invention belongs to the field of metal materials, and particularly relates to a high-strength hot-rolled pickled steel plate for an automobile chassis and a production method thereof. The steel plate is mainly suitable for manufacturing automobile chassis structural parts. The steel comprises the following chemical components: C, Si, Mn, Al, V, Ni, Cu, Cr, Pt and Y, P is limited to be less than or equal to 0.015%, S is limited to be less than or equal to 0.005%, N is limited to be less than or equal to 0.006%, and the balance is Fe and inevitable impurities. The yield strength of the steel plate ranges from 498 MPa to 552 MPa, the tensile strength ranges from 608 MPa to 643 MPa, the transverse elongation A ranges from 33% to 38%, the steel plate is qualified after transverse cold bending by 180 degrees D = a, the surface quality is good, oxide scale stripes and chromatic aberration defects are avoided, the surface roughness Ra ranges from 1.10 micrometers to 1.35 micrometers, and the steel plate has excellent corrosion resistance.

The invention belongs to the field of metal materials, and particularly relates to a high-elongation 288MPa-grade hot-rolled pickled steel plate for an automobile and a production method thereof. The steel plate is mainly suitable for manufacturing automobile chassis structural parts. The steel comprises the chemical components of C, Si, Mn, Al, Ti, Zr, Ni, Pt and Y, P is limited to be smaller than or equal to 0.015%, S is limited to be smaller than or equal to 0.005%, N is limited to be smaller than or equal to 0.003%, and the balance is Fe and inevitable impurities. The steel plate has excellent mechanical properties, the yield strength of the steel plate is larger than or equal to 238 MPa, the tensile strength is larger than or equal to 288 MPa, the transverse elongation A is larger than or equal to 48%, the hole expansion rate is larger than or equal to 132%, transverse cold bending is conducted by 180 degrees, D = a, the steel plate is qualified, the surface quality is good, oxide scale stripes and chromatic aberration defects are avoided, the surface roughness Ra is 1.08-1.48 micrometers, and the steel plate has good corrosion resistance.

The invention relates to the technical field of steel rolling, and discloses a Q355B steel hot rolling process optimization method based on dynamic temperature control, which comprises the following steps: blank pretreatment, dynamic heating control, high-pressure water descaling, rough rolling process, finish rolling process, laminar cooling and coiling process. According to the method, a collaborative system of multi-section variable-temperature heating and intelligent temperature control is constructed, temperature distribution in a furnace and the heating rate are monitored and dynamically adjusted in real time, it is guaranteed that the core surface temperature of a plate blank is uniform and consistent, thermal stress and the internal crack tendency in the heating process are eliminated, and a high-temperature blank uniform in structure and stable in performance is provided for follow-up rolling; meanwhile, the high-pressure water descaling system optimizes jet flow parameters and introduces chemical additives, so that a protective layer is formed while oxide scales on the surface are removed, the surface cleanliness and quality of the plate blank are improved, and product defects caused by incomplete descaling and surface damage are avoided.

The utility model belongs to the technical field of cleaning of oxide scales on the surfaces of steel billets, and discloses equipment for cleaning and recycling oxide scales of steel-making steel billets, which comprises two side plates, a steel billet roller way is arranged between the two side plates, and a fixed support is fixedly mounted at the top ends of the two side plates. An electric push rod is fixedly installed in the fixed support, the output end of the electric push rod is fixedly connected with a supporting frame, a first steel wire roller is rotationally connected between the inner walls of the supporting frame, movable frames are symmetrically and slidably installed in the two side plates, and steel plates are fixedly connected to the opposite ends of the two movable frames. The first steel wire roller and the second steel wire roller are designed above the steel billet roller way, so that the high-temperature-resistant first steel wire roller and the high-temperature-resistant second steel wire roller are in rolling contact with steel billets in the steel billet conveying process of the steel billet roller way, oxide scales on the steel billets are removed, and the subsequent steel billet machining quality and efficiency are guaranteed.

A method of remediating wastewater is provided, the method comprising substantially submersing an electrocatalytic reactor in wastewater, the electrocatalytic reactor including an anode, which is mesh and defines a first bore, a filter layer, which is porous glass, carbon fiber or poly-paraphenylene terephthalamide, the filter layer including fibers and interstitial spaces between the fibers, an iron-doped titanium dioxide film on the fibers, the film including a surface that is substantially iron oxide free, the filter layer housed within the first bore and defining a second bore, a cathode, which is housed within the second bore, is mesh and defines an inner bore, and a perforated air tube housed within the inner bore; and providing at least a voltage of at least about 3 volts to the electrocatalytic reactor, in the absence of a light source, thereby remediating wastewater.

A silicone rubber insulator shed material, and a silicone rubber insulator and a preparation method therefor and an application thereof. The components of the silicone rubber insulator shed material comprise silicone rubber, iron oxide, nano-montmorillonite, fumed silica, aluminum hydroxide, a silane coupling agent, a vulcanizing agent, and hydroxy silicone oil, wherein the iron oxide and the nano-montmorillonite can slow down the thermal oxidation decomposition of the silicone rubber, thus improving the hydrophobicity, hydrophobic mobility and hydrophobic recovery of the silicone rubber composite insulator, thereby solving the technical problem in the prior art that the aging decomposition resistance of silicone rubber needs to be improved.

The invention belongs to the technical field of comprehensive utilization of metallurgical and chemical resources, and discloses a method for improving the productivity of magnet powder and sulfuric acid by adding pyrite in copper smelting. According to the method, a heat release rate, SO2 generation kinetics and an iron oxide phase change path are synergistically optimized by constructing a gradient blending mechanism of pyrite and an in-furnace oxygen potential directional oxidation regulation and control system. The method is characterized in that on the basis of real-time feedback of the molten pool temperature, the flue gas SO2 concentration and the slag phase FeO activity, the pyrite blending rate, the granularity and the carrier gas oxygen concentration are dynamically regulated and controlled in a staged mode; a reduction microenvironment in which logpO2 is approximately equal to-11 is created on a slag-sulfonium interface, and growth of Fe3O4 crystal nucleus is promoted; and the flue gas cooling and acid-making gas inlet stability is optimized. According to the method, the capacity of the magnet powder and the capacity of the sulfuric acid are synchronously improved, the stability and the high efficiency of the copper smelting main process are guaranteed, and an engineering-oriented technical path is provided for comprehensive utilization of resources of copper smelting enterprises.

The invention discloses a rare-earth-based soil remediation catalyst as well as a preparation method and application thereof. The catalyst takes a composite oxide of micron-sized aluminum oxide and titanium dioxide as a carrier, a nano-fiber composite oxide of cerium oxide and copper oxide as an active component and a nano-particle composite oxide of iron oxide and manganese dioxide as a cocatalyst; on the basis of the mass of the carrier, the mass percentage of the active component is 5-10%, and the mass percentage of the cocatalyst is 3-6%. The catalyst synthesized through the method has the advantages of being good in soil compatibility, high in catalytic efficiency and the like, and the target of low-energy-consumption remediation of organic pollutant soil can be achieved.

The utility model discloses a novel oxide scale collecting device. Which comprises a hot-rolled rod and wire conveying roller way, and is characterized in that a chain plate type conveyor is arranged below the roller way; a slag collecting hopper is arranged at the tail part of the chain plate type conveyor; and an iron sheet slag collecting box is arranged below the slag collecting hopper. According to the utility model, the oxide scale does not need to be flushed into the rotational flow well or the primary sedimentation tank by using additional slag flushing water and slag flushing runner and then is collected by using a grab bucket type travelling crane, so that energy conservation and emission reduction are realized. Meanwhile, the design of a slag sluice of a furnace discharging table and a slag sluice of a roughing mill unit area is omitted, only the slag sluice with small gradient and depth in the area from an intermediate mill unit to a finishing mill unit is reserved, and a large amount of cooling water doped with only a small amount of oxide scale powder can be recycled.

Suppressing methane gas emissions from paddy rice cultivation is extremely important as a measure against global warming. The challenge here is to achieve both improved rice productivity and environmental protection. Specifically, this involves developing a device that can generate large quantities of high-concentration ultrafine bubble (UFB) water in a short time, by adding methane gas emission suppression to the UFB water. [Solution] The UFB generating apparatus of the present invention incorporates a variable-speed rotary stirring device into a UFB generation tank, and this tank is filled with sandy material. By supplying gas and water to this tank at high pressure, the sandy material layer of gas, water, and sandy material is liquefied. By rapidly rotating this liquefied layer with the rotary stirring device, the gas is confined in the pore water of the liquefied layer and then finely fragmented. Furthermore, by using sandy steel slag as the sandy material, in addition to the UFB effect, methane generation due to silica, lime, and iron oxide is suppressed and crop yields are improved.

The invention relates to the technical field of anti-corrosion coatings, in particular to a nano modified polysiloxane heavy anti-corrosion coating and a preparation method thereof.The nano modified polysiloxane heavy anti-corrosion coating is prepared from, by weight, 100 parts of polysiloxane resin, 5-15 parts of amino silane coupling agent, 20-40 parts of mica iron oxide, 1-5 parts of auxiliaries, 10-30 parts of solvent, 3-10 parts of biomimetic mineralization enhancer and 1-5 parts of additive; the biomimetic mineralization enhancer is prepared through dopamine modification and tetraethoxysilane mineralization treatment of nano diatomite, the compactness, adhesive force and physical shielding performance of the coating are remarkably improved, corrosion medium permeation can be effectively blocked, the additive is prepared from silver nanowires and polyvinylidene fluoride through electrostatic spinning, the coating is endowed with conductivity, and the corrosion resistance of the coating is improved. According to the invention, damage self-sensing and early warning are realized, so that the prepared coating has excellent salt mist resistance, wear resistance, impact resistance and long-acting corrosion resistance, is suitable for metal protection in a harsh corrosion environment, and has a wide application prospect.

A method for processing a plastic-derived oil may comprise contacting the plastic-derived oil with a catalyst to crack the plastic-derived oil to form a hydrocarbon product. The catalyst may comprise a metal oxide-loaded ZSM-5 zeolite comprising: ZSM-5 particles having a size of less than 100 nm, and one or more metal oxides chosen from iron oxide, lanthanum oxide, and cerium oxide. The one or more metal oxides may be disposed on the ZSM-5 particles.

A carbon dioxide (CO2) hydrogenation catalyst and a method of its preparation. The CO2 hydrogenation catalyst includes an alkali-metal enriched bauxite residue including calcium carbonate (CaCO3), iron(III) oxide (Fe2O3), iron(III) oxyhydroxide (FeO(OH)), aluminum hydroxide (Al(OH)3), sodalite, muscovite, and Na5Al2CSi3O15. The CO2 hydrogenation catalyst further includes 1 weight percent (wt. %) to 10 wt. % potassium based on a total weight of the CO2 hydrogenation catalyst by inductively coupled plasma optical emission spectroscopy (ICP-OES). The CO2 hydrogenation catalyst is used in a method of hydrogenating carbon dioxide to produce olefins.

The application relates to the technical field of steel metallurgy, and discloses a rolling process for improving the surface quality of C70S6 non-adjustable steel, which comprises the following steps: S1, a heating process; S2, a descaling process; S3, a rolling process; S4, a cooling process; and S5, a finishing process.The process can significantly reduce thermal stress cracks, the temperature uniformity of the casting blank from the surface to the core is improved through a three-stage heating mode and precise heat preservation control, the thermal stress is effectively released, the anti-collision and spacing control during charging are combined, local overheating or overcooling is avoided, the occurrence rate of surface micro-cracks and corner transverse cracks is reduced by more than 80%, and the surface integrity of the casting blank is greatly improved.The process can completely solve the iron oxide scale defects, the double high-pressure water descaling process after the furnace and before the medium rolling is adopted, the optimized combination of the descaling pressure and the water flow speed ensures that the residual area of the iron oxide scale is less than or equal to 3%, the iron oxide scale pressing-in defects are completely eliminated, and the surface cleanliness of the steel is significantly improved, thereby providing a high-quality base for subsequent processing.

The application discloses a low-carbon-source denitrification method, and belongs to the technical field of sewage treatment. The method comprises the following steps: mixing FeSO4 and FeCl3 solutions; adjusting the pH value of the mixed solution to 10-12 to generate iron oxide precipitate; mixing the iron oxide precipitate with volcanic rock at a weight ratio of 100:1, and heating and drying the mixture at 200-300 DEG C to prepare a biological carrier; using the prepared biological carrier to treat effluent from a biochemical secondary sedimentation tank in a treatment unit; performing backwashing after the treatment unit is operated for 3-7 days; controlling the DO concentration of incoming water to be not more than 1 mg / L; when the DO concentration of the incoming water is more than 1 mg / L, reducing the aeration amount of the upstream or increasing the HRT of the treatment unit; and when the DO concentration of the incoming water is not higher than 1 mg / L, controlling the HRT of the system to be not more than 40 min. The method is mainly used for efficiently treating low-carbon-source sewage, improving the denitrification efficiency and reducing the treatment cost.

The present application belongs to the technical field of wastewater treatment, and discloses a method for treating electroplating wastewater by using bioreduction of biogas slurry and combined iron bio-oxidation, which is a secondary combined use technology for removing various heavy metals in electroplating wastewater by iron bio-oxidation, comprising the following steps: (1) collecting fermentation biogas slurry, and performing ultraviolet irradiation sterilization after aeration; (2) adding potassium dichromate solution and fresh nutrient solution to the sludge system, and culturing anaerobic sludge; (3) adding treated biogas slurry to the anaerobic sludge, and repeatedly domesticating chromium-reducing microorganisms; (4) configuring a mixed solution of comprehensive electroplating wastewater and biogas slurry according to a certain proportion; (5) building a primary treatment biological reactor, and reducing Cr(VI) in wastewater by anaerobic biological reduction under the promotion of pyrite; and (6) building a secondary biological reactor filled with straw biomass charcoal, and generating iron oxides under the action of functional bacteria to continue adsorbing Cd, Cu and Ni ions in wastewater.

The invention relates to the technical field of silicon steel production and processing, in particular to a high-temperature low-acid-consumption acid pickling and cold rolling process for a silicon steel strip. According to the method, low-concentration hydrochloric acid is combined with high-temperature pickling to enhance the reaction activity, and the consumption of hydrochloric acid can be greatly reduced on the premise of ensuring the oxide scale removal effect; meanwhile, the corrosivity of low-concentration hydrochloric acid to equipment is reduced, and the maintenance cost of the equipment can be saved; two-section gradient concentration pickling is matched with a high-temperature process, the oxide scale is efficiently removed layer by layer, the process can be optimized in real time according to the actual residual quantity in combination with self-adaptive adjustment of pickling parameters, and the pickling effect is remarkably improved; the rough rolling descaling pass is added before the follow-up cold rolling procedure, so that residual oxide scale can be thoroughly removed; the pickling parameters are adaptively adjusted according to the amount of residual oxide scales on the surface of the steel strip, pickling effect fluctuation caused by the difference of the oxide scales of raw materials can be effectively avoided, and the stability of the production process and the product percent of pass are ensured.

The invention discloses a method for precipitating iron through ultrasonic enhanced oxidation, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: performing ultrasonic treatment on a mixed system of an iron-containing zinc sulfate solution and an oxidizing agent under an acidic condition, efficiently catalyzing ferrous ions (Fe < 2 + >) to be oxidized into ferric ions (Fe < 3 + >) by utilizing an ultrasonic cavitation effect, and promoting the ferric ions to be stably precipitated in a goethite (alpha-FeOOH) form; after the reaction is completed, carrying out solid-liquid separation to obtain a low-iron zinc sulfate solution and goethite slag; compared with a traditional jarosite method and a hematite method, the method has the advantages that exogenous cations such as potassium and sodium do not need to be introduced, a high-temperature and high-pressure environment is not needed, and the oxidation efficiency can be remarkably improved and the goethite crystal form conversion can be regulated and controlled only based on the ultrasonic cavitation effect, so that the consumption of an oxidizing agent and the zinc content in the slag are effectively reduced; meanwhile, the iron grade and the filtering performance of an iron precipitation product are improved; the method is suitable for various oxidants, is high in process adaptability, has the advantages of high efficiency, greenness and economy, and has wide popularization and application prospects in the field of zinc smelting.

The utility model relates to annealing furnace technical field, concretely relates to a seamless steel tube production is with annealing furnace, including annealing furnace main part, is provided with the discharge roller on the annealing furnace main part, is provided with the liquid collecting groove with the slope in the side of annealing furnace main part close to the discharge roller, the bottom of liquid collecting groove slope is provided with the filter plate, the top of filter plate is provided with the cleaning part for sweeping the impurity particle, through the coordination and cooperation of transmission mechanism, synchronous assembly and guide mechanism, make the cleaning part move along the filter plate, sweep the impurity particle accumulated on the filter plate surface, avoid the impurity particle to accumulate too much, prevent the filter plate from blocking, solved the technical problem that the metal particle or iron oxide that the clean water carried after spraying the steel pipe is easy to accumulate on the filter screen, leads to the filtration area reduction, makes the filter screen filtration efficiency decline, easily causes the annealing furnace overflow.

The present application relates to the technical field of soil remediation, and discloses a composite microbial inoculum for activating reverse conversion of oxidized iron in dry land soil and application thereof.The composite microbial inoculum comprises aerobic iron-reducing bacteria and phenazine electron shuttles.The present application mediates the aerobic iron-reducing process of the aerobic iron-reducing bacteria strain through the phenazine electron shuttles, significantly improves the electron transfer efficiency, enhances the iron-reducing capacity, and can efficiently generate high-activity weak-crystalline iron oxide under aerobic conditions, thereby breaking through the limitation of traditional iron reduction relying on anaerobic environment;by promoting the reverse conversion of high-crystalline oxidized iron to weak-crystalline oxidized iron, the mineral interface activity is improved, the fixation capacity for Cd, Pb, As and other multi-metals in dry land soil is significantly enhanced, the biological availability thereof is reduced, the biological toxicity and migration risk thereof are greatly weakened, the remediation process is stable, the risk of secondary pollution is low, and the present application has good application prospect and popularization value in the field of heavy metal contaminated soil remediation.

The invention discloses a method and equipment for in-situ synthesis of food-grade nano iron oxide from a donkey-hide gelatin medium, and the method comprises the following steps: dissolving enzymolysis donkey-hide gelatin peptide at 75-82 DEG C by using an interlayer heating type gelatin boiling tank to form a reaction medium, applying 40-60kHz ultrasonic waves through a piezoelectric ceramic ultrasonic vibrator array integrated at the bottom of the tank, and generating a 0.3-0.5 T magnetic field through a Helmholtz coil surrounding the tank, the uniform dispersion and directional crystallization of Fe < 3 + > / Fe < 2 + > (the molar ratio is 2: 1) in a donkey-hide gelatin matrix are synergistically promoted; the preparation method comprises the following steps: accurately regulating the pH value to 8.5-9.5 by utilizing an ammonia water pulse quantitative injection device, combining citric acid-ascorbic acid dual modification, and finally carrying out magnetic separation, ceramic membrane filtration and freeze drying to obtain the high-purity beta-cyclodextrin with the average particle size of 38.5 + / -4.2 nm (PDilt; 0.2) of nano iron oxide; the bioavailability is more than two times that of a traditional iron agent, and no organic solvent is left; according to the method, safe, efficient and large-scale preparation of the nano iron oxide is realized through equipment-process collaborative innovation.

A group of inventions relates to the field of medical devices. A method for producing needles with adsorption properties is described by depositing an iron oxide coating onto the needle by atomic layer deposition. An acupuncture needle for reflex therapy, consisting of a handle and shaft made of metal material, is placed in a reactor where a vacuum is created at a pressure of approximately 10 mbar ± 0.1 mbar and a temperature of 150 ± 0.2 °C, then a ferrocenecarboxylic acid precursor in the form of vapor is delivered to the reactor, then nitrogen is added to the reactor and degassed to the initial pressure, and this process is repeated in pulse mode until a specific coating thickness is formed. The use of ferrocenecarboxylic acid as a precursor for producing an Fe3O4 coating is described. An acupuncture needle for adsorbing toxic heavy metal ions is described with a coating of Fe3O4 nanofilm thickness of 14 nm ± 0.1 nm, and the nanofilm has the appearance of a nanosieve as shown in Figure 1b. The use of acupuncture needles for adsorbing metal ions is described. The technical achievement of this invention is the development of a method for attaching a magnetic separation film of Fe3O4 to the surface of an acupuncture needle, which is simpler and less expensive in terms of methodology and technique, thereby imparting adsorption properties to the acupuncture needle. The needle of this invention makes it possible to adsorb toxic heavy metal ions such as cadmium, arsenic, manganese, cesium, aluminum, iron, cobalt, nickel, chromium, mercury, lead, copper, zinc, beryllium, antimony, thallium, bismuth, osmium, tin, molybdenum, zirconium, titanium, vanadium, molybdenum, and gallium.

The invention provides an application and a device of recycled silicon powder in polycrystalline silicon production in ferrosilicon smelting. High-purity fine silicon powder generated in the polycrystalline silicon production process is recycled and used for ferrosilicon smelting, resource utilization of industrial solid waste is achieved, and remarkable environmental protection and economic value is embodied. The high-purity silicon powder can be directly subjected to a solid-phase reduction reaction with iron oxide in furnace charge, so that the consumption of coke or other carbon sources is reduced, the emission of carbon dioxide is reduced, and the energy consumption required for reducing silica into silicon is also reduced. According to the scheme, complex impurity removal treatment is not needed, the silicon powder can participate in the reduction reaction through segmented blowing of the blast furnace tuyere, operation is easy and convenient, the source is stable, the quality uniformity of raw materials is guaranteed, and therefore the chemical component controllability and the smelting efficiency of silicon iron products are improved. The recycled silicon powder is small in particle size, large in specific surface area and high in reaction rate, the smelting time can be further shortened, and the overall production efficiency is improved.

The utility model relates to the technical field of iron-making equipment, and provides iron-making equipment suitable for low-grade iron ore, which comprises a mixing device for mixing low-grade iron ore powder, pulverized coal and an adhesive; the ball press machine is used for cold-pressing the mixture into cold-pressed balls, and the mixing device is connected with the ball press machine; the rotary kiln is used for reducing iron oxide in the cold-pressed balls, the ball press machine is connected with the rotary kiln, and the cold-pressed balls are reduced in the rotary kiln to generate iron shots; the heat preserving furnace is used for preserving heat of the cold-pressed balls and is connected with the rotary kiln; the crushing furnace is used for cooling the cold-pressed balls, the heat preservation furnace is connected with the crushing furnace, iron beads are stripped from generated impurity powder in the cooling process of the cold-pressed balls in the crushing furnace, and a screen used for separating the iron beads from the impurity powder is arranged in the crushing furnace. According to the utility model, the problem that the existing direct reduction ironmaking technology has high dependence on high-grade iron ore can be solved, and high-quality utilization of low-grade iron ore is realized.

The invention belongs to the technical field of preparation of nano functional materials, and particularly discloses magnetic nano ferroferric oxide regulated and controlled by polyaspartic acid and a preparation method and application thereof.The preparation method comprises the following steps that 1, a dispersing agent polyaspartic acid or a salt water solution of the polyaspartic acid is added into a Fe < 2 + > / Fe < 3 + > mixed solution, and the mixture is stirred to be uniform to form a precursor dispersion solution; (2) heating the precursor dispersion liquid, dropwise adding an alkali source to adjust the pH value of a reaction system to 8-12, and carrying out a nucleation reaction under ultrasonic treatment; and (3) after the reaction is finished, separating the magnetic particles through an external magnetic field, alternately washing with deionized water and ethanol for 2-5 times, and carrying out vacuum drying to obtain the magnetic nano ferroferric oxide particles. The prepared magnetic nano ferroferric oxide has the particle size of 30-80nm, the saturation magnetization of more than or equal to 36emu / g, stable dispersion and the cell survival rate of more than or equal to 80%. The method solves the problems of particle aggregation, weak magnetism and complex process in the traditional method, can be used for wastewater treatment, and is economical and efficient in process and suitable for large-scale production.

Treatment fluids and methods for dissolving titanium-iron oxides and iron oxides in a wellbore. A treatment fluid includes an activator selected from the group consisting of chlorophyll, pheophytin, hydroxylammonium chloride, dopamine, crown ethers, cryptands, ethanoloamine, trihydroxamate-containing siderophores, salts thereof, and any combination thereof, an acid and / or acid-generating agent, and an aqueous base fluid. The treatment fluid contacts a titanium-iron oxide and / or iron oxide to dissolve the titanium-iron oxide and / or iron oxide.

The invention relates to an In (at) H-Beta / Fe3O4 catalyst, a preparation method thereof and application of the In (at) H-Beta / Fe3O4 catalyst in methane selective catalytic reduction of nitric oxide, and the preparation method comprises the following steps: firstly, carrying out ion exchange reaction on an H-Beta molecular sieve and an indium precursor solution, and calcining to obtain an In (at) H-Beta precursor; and mixing the In-coated H-Beta precursor with the Fe3O4 dispersion liquid, and calcining to obtain the In-coated H-Beta composite material. Compared with the prior art, the method has the advantages that molecular sieve confinement loading of indium species and surface modification synergy of the iron oxide nanoparticles are realized by adopting a hierarchical loading strategy, and the obtained catalyst shows excellent activity and water-resistant stability in CH4-SCR reaction, and has adjustable metal dispersity and strong metal-carrier interaction; a new scheme is provided for the development of a catalyst for efficiently resisting water poisoning, and the catalyst has a remarkable industrial application value.

A method for preparing and applying an iron hydroxyl oxide-metal-organic framework heterostructure alkaline water electrolysis catalyst is disclosed, belonging to the technical field of electrochemical energy storage materials. The preparation method involves: firstly, anolysing iron foam under constant current; then dissolving 2,5-dihydroxyterephthalic acid and nickel nitrate hexahydrate in a mixed solvent of N,N-dimethylformamide / ethanol / deionized water; transferring the mixture to a reaction vessel, tilting the iron foam into the vessel, sealing and heating the reaction, and then naturally cooling to room temperature; removing the iron foam, rinsing it with deionized water and ethanol (both sides), and finally vacuum drying. This method is simple and reproducible, requiring no cumbersome high-temperature pyrolysis or etching processes, and is suitable for large-scale preparation. In a standard three-electrode system, the prepared electrocatalyst is directly used as the working electrode in a 1 M KOH electrolyte for electrocatalytic reaction; the electrocatalyst exhibits excellent water splitting activity and cycling stability at high current densities.

This invention relates to a gold-sand porcelain, comprising a ceramic body, characterized by further including a carved layer disposed on the surface of the ceramic body. The ceramic body comprises, by weight, the following components: 35-50 parts mineral clay, 25-35 parts hydromica, 2-6 parts kaolin, 10-20 parts quartz, 5-10 parts mica, 1-6 parts silicon dioxide, 2-5 parts iron oxide, 1-3 parts aluminum oxide, 2-6 parts calcium oxide, 2-5 parts magnesium oxide, 5-10 parts manganese oxide, 1-6 parts potassium oxide, 2-5 parts sodium oxide, and 2-6 parts zinc oxide. The carved layer is decorated according to a desired pattern. The gold-sand porcelain of this invention is characterized by being made of clay with a high gold content, being unglazed, having good breathability, good thermal shock resistance, preserving the original flavor of food, and optimizing and activating beneficial bacteria.

This invention discloses a coatable, moldable dual-functional coating material for heat protection and stealth, and its preparation method. The coating material is formed from a SiC-based composite ceramic aerogel slurry, a perovskite / MAX phase composite ceramic absorber, and a high-temperature resistant binder. The composite ceramic aerogel slurry is composed of SiC micro / nano-scale aerogel powder, SiC nanowires, and a high-temperature resistant binder; the perovskite ceramic absorber is lanthanum strontium manganese oxide (La). 1‑x Sr x MnO3), lanthanum strontium iron oxide (La) 1‑ x Sr x FeO3), lanthanum strontium cobalt oxide (La) 1‑x Sr x The MAX phase ceramic absorber is Ti3SiC2, and it contains substances such as CoO3. The technology of this invention enables the rapid application of coating materials to the surface of equipment via brushing, enhancing high-temperature radar absorption stealth and thermal protection capabilities, and facilitating the preparation and efficient repair of high-temperature stealth coatings.