210 results about "Aluminum element" patented technology

The invention discloses a ternary positive electrode material, a preparation method thereof and an electrochemical device. The preparation method comprises the following steps: mixing a continuous ternary precursor, a lithium source and an aluminum source, and carrying out first sintering to obtain a first sintered product; the primary sintering product is subjected to secondary sintering and dispersion, a single-crystal base material is obtained, the base material comprises a plurality of primary particles, the average size of the primary particles ranges from 2 micrometers to 3 micrometers, and the median particle size Dv50 of the primary particles ranges from 3 micrometers to 5 micrometers; mixing the matrix material with an aqueous solution of lithium phosphate, and carrying out wet coating to obtain a coated product; and sintering the coated product for the third time, so that the lithium phosphate forms a coating layer on the surface of the matrix material, and the ternary positive electrode material is obtained. According to the invention, through two-parameter control of the average size and the median particle size of the matrix material and simultaneous aluminum element internal doping and lithium phosphate surface coating of the matrix material, the structural stability and the cycle performance of the ternary positive electrode material are improved and the service life of the ternary positive electrode material is prolonged through a synergistic effect.

The invention discloses a production method for reducing flaw detection defects of wind power gear steel, and belongs to the technical field of ferrous metallurgy. According to the method, an electric furnace-LF-VD-continuous casting process route is adopted, the mass fraction of an aluminum element Al in molten steel is controlled to be not lower than 0.018% in the LF refining process, and the mass fraction of [Al] is controlled to be higher than 0.010% all the time in the VD vacuum treatment process. And after VD vacuum breaking, aluminum is supplemented in time, the mass fraction of Al is increased to 0.015%-0.020%, calcium treatment is reasonably carried out, and the mass fraction of Ca in molten steel is controlled to be 0.0006%-0.0009%. By accurately controlling the component change of the molten steel in the VD process, the formation of CaO-MgO-Al2O3-SiO2 inclusions with high SiO2 content is effectively inhibited, the large-size ultrasonic flaw detection defects in the wind power gear steel are remarkably reduced, and the internal quality of the steel is improved. The method is simple in process and remarkable in effect, and has a good industrial application prospect.

A toner including: a toner particle; and an inorganic fine particle, wherein the inorganic fine particle contains a strontium titanate fine particle, a Si-containing protrusion portion is present at a surface of the strontium titanate fine particle, and the toner contains an amorphous polyester resin and an aluminum element at a surface of the toner particle.

The invention relates to the technical field of ethylene selective oligomerization, in particular to a catalyst composition for ethylene selective oligomerization and a preparation method of alpha-olefin. The catalyst composition comprises a main catalyst and a co-catalyst, the main catalyst comprises a complex; a ligand of the complex is a compound as shown in a formula (I), and a coordination metal is a VIB-VIII family metal element; the cocatalyst comprises an organic compound containing an aluminum element. The catalyst composition can reduce the generation amount of a polymer and improve the yield of alpha-olefin, can maintain very high activity at high temperature, and has very good 1-octene selectivity.

The invention discloses a method for treating indium raffinate, which comprises the following steps: mixing the indium raffinate with ammonium sulfate, and reacting to obtain a mixed solution; wherein the indium raffinate comprises aluminum ions; cooling the mixed solution to obtain an aluminum ammonium sulfate crystal; adding the aluminum ammonium sulfate crystal into water, and carrying out heating treatment to obtain an aluminum ammonium sulfate solution; adjusting the pH value of the aluminum ammonium sulfate solution to 4.5-5.5 to obtain an aluminum hydroxide precipitate; and calcining the aluminum hydroxide precipitate to obtain aluminum oxide. Therefore, according to the method, the aluminum element in the zinc hydrometallurgy system can be removed, the aluminum element is converted into an aluminum oxide product to be recycled, and good environmental protection benefits and economic benefits are achieved.

The invention belongs to the technical field of organic liquid hydrogen storage, and discloses a catalyst and a preparation method thereof, and hydrogenation and dehydrogenation methods of a liquid organic hydrogen carrier. The catalyst is used for hydrogenation and dehydrogenation of a liquid organic hydrogen carrier, the catalyst comprises a nickel element and an aluminum element, and the average particle size of the catalyst is 300-900 [mu] m. The catalyst provided by the invention has relatively high hydrogenation and dehydrogenation activity and long-period stability, meanwhile, the preparation cost of the catalyst is greatly reduced compared with that of a traditional noble metal catalyst, and further commercial application of an organic liquid hydrogen storage technology is facilitated.

The present application relates to the field of catalytic cracking of hydrocarbons, in particular to a silicon-aluminum molecular sieve catalyst, a preparation method and application thereof, and aims to provide a method for synthesizing a silicon-aluminum molecular sieve by mechanical ball milling, in which full-silicon molecular sieves are synthesized, and aluminum elements are selectively added into the full-silicon molecular sieves, so that the synthesized silicon-aluminum molecular sieve has appropriate acidity and good pore structure, and the ball milling process can form more defects on the outer surface of the full-silicon molecular sieve, thereby increasing the positioning space of aluminum.

This invention discloses a method for preparing and applying a magnetron sputtering-modified zirconium-aluminum osteogenic electroactive film, relating to the field of osteogenic film material technology. The method involves cleaning and drying a PVDF film; fixing the PVDF film onto a glass slide and placing it in a magnetron sputtering chamber; and depositing elemental zirconium and aluminum onto the PVDF film using magnetron sputtering to prepare the magnetron sputtering-modified zirconium-aluminum osteogenic electroactive film. The magnetron sputtering-modified zirconium-aluminum osteogenic electroactive film contains 46.15-46.35 wt% zirconium, 19.25-19.45 wt% oxygen, 19.25-19.45 wt% fluorine, and 1.77-1.97 wt% aluminum. The film material prepared by this invention possesses excellent biocompatibility, antibacterial properties, and osteogenic induction ability, expanding its application scenarios in the oral cavity and other parts of the body.

The invention belongs to the technical field of preparation of nano silicon materials, and particularly relates to a method for preparing nano silicon by etching a silicon-aluminum alloy and a nano silicon material thereof. Comprising the following steps: placing a pretreated silicon-aluminum alloy sample wafer in an etching tank containing a main etching solution, etching under the action of an alternating pulse electric field and ultrasonic-megasonic coupling, and adjusting the pH value to 2.5-3.0 by using acetic acid; quickly washing the silicon-aluminum alloy sample wafer subjected to main etching, putting the silicon-aluminum alloy sample wafer into an electrolytic cell containing a composite buffer solution of oxalic acid and sulfuric acid, and performing electrochemical fine etching under a direct-current constant-voltage electric field; and when the etching current density is reduced to 10% of the initial value, the reaction is terminated, and after low-temperature treatment and low-temperature vacuum drying, the nano silicon material with the residual Al content of 8-12 wt% and the O / Si atomic ratio of 0.15-0.25 is obtained. According to the invention, the problems of out-of-control components, structural damage and serious pollution in the prior art are solved, and the nano silicon material with controllable residual aluminum element and low oxygen-silica ratio can be stably prepared.

The invention discloses a method for preparing polyaluminum chloride from fly ash through mechanical activation and ammonium sulfate roasting and synchronously removing calcium, and particularly relates to the field of hydrometallurgy and solid industrial waste treatment. Adding ammonium sulfate powder into the ground fly ash obtained in the step S1, carrying out a roasting process, carrying out sulfuric acid leaching, adding calcium hydroxide at the same time, and carrying out solid-liquid separation; by adopting the ground fly ash, favorable conditions are created for roasting the ammonium sulfate powder and the aluminum compound. According to the technology, the aluminum element in the fly ash can be efficiently extracted within 30 minutes, resource utilization of solid waste is promoted, aluminum resources in the ash residues are recycled to the maximum extent, and the problems proposed in the background technology are solved.

The invention relates to a static sintering method and system for preparing aluminum hydroxide by extracting an aluminum element from fly ash, and the static sintering method comprises the following steps: firstly, taking a raw material which is crushed to a process control fineness as a pre-powder material, carrying out raw material preparation and blank forming on the pre-powder material to obtain a blank, sintering the blank to obtain a clinker, and sintering the clinker to obtain the aluminum hydroxide. The clinker is dissolved out to obtain slurry, and then the slurry is subjected to slurry desilicication, carbon component reaction, hydrogen-aluminum separation and drying to prepare high-whiteness and high-purity aluminum hydroxide; wherein the raw materials comprise fly ash; the blanks are sintered into polygon prism-shaped blanks, the polygon prism-shaped blanks are stacked on a high-temperature-resistant kiln car in an industrial tunnel kiln, the blanks are roasted in the industrial tunnel kiln, and the roasting temperature ranges from 800 DEG C to 1100 DEG C. According to the invention, solid wastes such as fly ash, coal gangue, carbide slag and the like, pulverized coal and sodium carbonate are crushed into materials with the same fineness, high-whiteness and high-purity aluminum hydroxide can be obtained through an alkaline static sintering process, the recovery rate of aluminum in the solid wastes is about 90%, and harmless, resource and synergistic utilization of the solid wastes such as fly ash and the like is realized.

The invention relates to the technical field of nano-coatings, and discloses a high-temperature self-lubricating wear-resistant nanocrystalline coating with a bionic structure and a preparation method thereof.The preparation method comprises the steps that nickel-chromium alloy and pure aluminum serve as target materials, a plurality of basic unit layers are sequentially and repeatedly deposited on the surface of a base material from bottom to top through the magnetron sputtering technology, and the high-temperature self-lubricating wear-resistant nanocrystalline coating with the bionic structure is obtained; the plurality of basic unit layers form a coating, each basic unit layer comprises a first layer and a second layer, the first layer of the lowest basic unit layer is combined with the base material, the second layer of the uppermost basic unit layer forms a surface layer, the first layer of each basic unit layer comprises Ni and Cr elements, the second layer of each basic unit layer comprises Ni, Cr, Al and optionally O elements, and the surface layer of each basic unit layer comprises Ni, Cr, Al and optionally O elements. And the O element content of the second layer of the plurality of basic unit layers is gradually increased along with the increase of the number of deposited layers. The components and the structure of the coating are constructed in a gradient manner through oxygen element doping and aluminum element deposition time regulation and control, so that the coating has excellent tribological performance at the temperature of 600-800 DEG C, and the long-term anti-attrition and wear-resistant protection effect can be achieved.

The invention provides a secondary battery, an electric device, a positive electrode active material and a preparation method thereof. The secondary battery comprises a positive electrode plate, the positive electrode plate comprises a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector, the positive electrode film layer comprises a positive electrode active material, the positive electrode active material comprises a lithium transition metal oxide, and the lithium transition metal oxide comprises a nickel element. The catalyst comprises at least one of a cobalt element, a manganese element and an aluminum element; relative to 1 mole of lithium transition metal oxide, the molar content of the lithium element is 1.01-1.15; the lithium transition metal oxide further comprises a doping element, and the doping element comprises at least one of Mo, W, Ta, Nb, Sb, Ti and Zr. The battery has improved cycle stability.

The invention provides a current collector and a battery, which can reduce the weight of the current collector and the battery provided with the current collector while inhibiting the reduction of the conductivity of the current collector, and can inhibit the reduction of the thermal conductivity of the current collector. A current collector (100A) is provided with a support layer (110) and a conductive layer (120). The support layer (110) is configured from a resin composition having electrical insulating properties. The conductive layer (120) is laminated on the support layer (110). The conductive layer (120) is made of an alloy containing elemental magnesium, elemental aluminum, and elemental calcium.

The application provides a mixed powder for foamed aluminum, a foamed aluminum composite material and a preparation method thereof, the mixed powder comprising a base material, a foaming agent and a brazing agent; the base material comprises aluminum elements, silicon elements and copper elements; the copper elements exist in the form of copper powder; the difference between the solidus temperature of the brazing agent and the hot rolling temperature is-30 DEG C to 30 DEG C, and the mass percentage of the brazing agent is greater than or equal to 0.2wt% based on the mixed powder. For the foamed aluminum alloy system with Cu as a secondary main alloy element, the application can directly foam without diffusion annealing, and uniform and small pores are obtained, so the application prospect is wide.

The invention discloses a method for detecting the content of aluminum oxide in a high-aluminum material, based on the principle of EDTA complexometric titration, EDTA and aluminum ions form a stable complex (1gK = 16.1) in a buffer system with the pH value of 6.0, and the end point is judged according to the color change (brilliant yellow-purplish red) of an indicator, the method has the advantages that insoluble substances such as aluminum nitride can be completely decomposed by adopting alkali fusion pretreatment of YST 575.1, and full release of aluminum elements is ensured; by combining a GB / T 6900 titration system and optimizing a buffer condition and a masking agent, interference of iron (III), calcium, magnesium and the like is effectively overcome, so that the method has high accuracy and strong anti-interference performance (can tolerate Cl <-> of less than or equal to 3.5% and Fe of less than or equal to 1.8%), and is suitable for detection of aluminum ash residue recycling products with complex components.

The application provides a MgAl2O4 carrier and a preparation method and application thereof, and relates to the technical field of catalysts. Urea, a soluble aluminum salt, a soluble magnesium salt, polydiallyldimethylammonium chloride and water are mixed to carry out a hydrothermal reaction to obtain a precipitate; the molar ratio of the urea, aluminum elements in the soluble aluminum salt, magnesium elements in the soluble magnesium salt and the polydiallyldimethylammonium chloride is 4.5:2:1:(1-2); the precipitate is sequentially dried and calcined to obtain the MgAl2O4 carrier. The prepared MgAl2O4 carrier is used as a catalyst carrier in a high-temperature and high-pressure dry reforming reaction of methane and carbon dioxide, and excellent stability is exhibited; under high-temperature and high-pressure conditions of 850 DEG C and 2 MPa, the MgAl2O4 carrier is evaluated for 230 hours, and the morphology of the MgAl2O4 carrier before and after the reaction has no obvious difference, the specific surface area changes little, and excellent mechanical strength and chemical stability are shown.

The invention discloses a preparation method of aluminum oxide coated lithium-rich lithium ferrite and a lithium ion battery, and the method comprises the following steps: dissolving a soluble aluminum salt in a first organic solvent to form an aluminum salt solution; dispersing the lithium-rich lithium ferrite and an alkaline compound in a second organic solvent to form a mixture; stirring the mixture, heating the mixture to a reflux temperature, dropwise adding the aluminum salt solution into the mixture, and carrying out a reaction, so that the aluminum element is precipitated in situ in the form of aluminum hydroxide and coats the surfaces of the lithium-rich lithium ferrite particles to obtain a mixed dispersion liquid; carrying out solid-liquid separation on the mixed dispersion liquid to obtain a coated precursor; the precursor is subjected to heat treatment in an inert or reducing atmosphere, so that the precursor is converted into aluminum oxide, the aluminum oxide coated lithium-rich lithium ferrite is obtained, the coated aluminum oxide coating layer is more uniform and can better resist moisture in air, and the excellent lithium supplementing characteristic is played in the electrochemical lithium supplementing process.

The application discloses a copper-based catalyst and a preparation method and application thereof, relates to the technical field of catalysts, and discloses a preparation method of the copper-based catalyst, which comprises the following steps: mixing a zinc element precursor and an aluminum element precursor to obtain a first mixed solution, mixing a copper element precursor and an additive precursor to obtain a second mixed solution, and configuring an alkaline precipitator solution, wherein the alkaline precipitator solution contains a silicon dioxide precursor; the first mixed solution and the alkaline precipitator solution are mixed with each other, zinc components and aluminum components are precipitated, and a first suspension liquid is obtained; the second mixed solution and the alkaline precipitator solution are added into the first suspension liquid, copper components and additives are precipitated, and a second suspension liquid is obtained; and the second suspension liquid is subjected to aging treatment, drying treatment and calcination treatment in sequence, so that the copper-based catalyst is obtained. The application solves the technical problems of poor stability and low catalytic hydrogenation activity of the copper-based catalyst in the prior art.

The invention relates to a method for recycling copper tailings in a segmented and quality-divided manner, which comprises the following steps: S1, roasting the copper tailings to obtain roasted slag; s2, adding alkali into the roasting slag, dissolving, and filtering to obtain alkali-dissolved filter slag and alkali-dissolved filtrate; s3, adding an acid into the alkali dissolution filtrate for precipitation, and filtering to obtain an acid precipitation precipitate and an acid precipitation filtrate; s4, carrying out refining and hydrothermal reaction on the acid precipitation precipitate to obtain boehmite; and adding potassium salt into the acid precipitation filtrate, and performing evaporative crystallization to obtain potassium sulfate. According to the method, the copper tailings are treated through cooperation of roasting and alkali dissolution, sulphoaluminate can be decomposed, dissolution of sulfur and aluminum elements can be promoted, potassium sulfate and boehmite which are high in additional value are recycled in a segmented and quality-divided mode, and the comprehensive utilization rate of the copper tailings is remarkably increased. In addition, the problem that the building material expands and cracks due to sulfate can be avoided through recovery of the sulfur element in the copper tailings.

The invention discloses a method for synthesizing a Beta molecular sieve from fly ash, and belongs to the technical field of fly ash resource utilization. The method comprises the following steps: adding sodium carbonate into fly ash as a raw material, mixing and calcining to obtain activated fly ash which is easily soluble in an acidic medium; adding sulfuric acid to decompose the sintered product to dissolve the sintered product, heating and aging to separate silicon from aluminum to obtain silica gel and a metal salt solution, preparing white carbon black from the silica gel, and separating and purifying the metal salt solution to prepare a sodium metaaluminate solution; the preparation method comprises the following steps: putting white carbon black into a sodium metaaluminate solution, adding a template agent, uniformly stirring, putting into a reaction kettle, and crystallizing at high temperature to prepare the Beta molecular sieve. According to the method, the problem of excessive impurities in the traditional method for preparing the molecular sieve from the fly ash is better solved, silicon and aluminum elements in the fly ash can be fully extracted, and the Beta molecular sieve with fewer impurities is prepared, so that green, refined and efficient utilization of the fly ash is realized.

The invention relates to the technical field of aero-engine maintenance, and discloses a maintenance method for reducing the failure rate of aluminum element content exceeding of lubricating oil of an accessory casing of an aero-engine so as to reduce the failure rate of aluminum element content exceeding of the lubricating oil of the accessory casing of the aero-engine. Comprising the following steps: 1) according to an easy-to-wear area of an aluminum bushing of an accessory casing to be maintained, determining a corresponding area of the aluminum bushing to be strengthened as a laser shock strengthening area, and setting machining allowance; (2) determining a deformation control area and machining allowance of the aluminum bushing to be strengthened; (3) carrying out laser shock peening pretreatment on the aluminum bushing to be subjected to peening processing; and 4) performing laser shock peening on the laser shock peening area of the aluminum bushing to be subjected to peening processing, so that the abrasion loss in the peening area of the aluminum bushing can be reduced by 52%, the spectral aluminum element content of lubricating oil of the accessory casing is reduced by 38.5%, and meanwhile, deformation and laser burn of the aluminum bushing caused by laser shock peening are avoided.

The invention relates to a multi-metal element nano-aluminum adjuvant and a preparation method and application thereof, the nano-aluminum adjuvant is a nano-particle containing an aluminum element and at least one metal element selected from magnesium, zinc and calcium, the nano-particle has a layered crystal structure, and the particle size is distributed in a range of 20-2000 nm. The difunctional nano-aluminum adjuvant has the beneficial effects that the difunctional nano-aluminum adjuvant is simple and convenient in preparation method, definite in component and uniform in particle size, the particle size of the particles can be manually regulated and controlled, and the difunctional nano-aluminum adjuvant can directly promote antigen presenting cells to be mature and activated and carry out MHC-I or II type antigen presentation.

The invention discloses a method for recovering valuable elements in liquid obtained after bauxite wet desulphurization, and relates to the technical field of bauxite resource utilization. Comprising the following steps: carrying out ceramic membrane filtration pretreatment on the bauxite wet desulfurization liquid to remove impurities; the silicon element is recycled in a targeted manner through a compound flocculation-calcination process to obtain the white carbon black; the iron element is recycled through ozone oxidation-ammonium bicarbonate precipitation, and high-purity iron oxide is prepared; separating and purifying an aluminum element through a seed crystal induction-calcination process to obtain metallurgical-grade aluminum oxide; a fluorine-containing precipitant is used for selectively precipitating and recovering magnesium element to obtain a high-quality magnesium salt product; and neutralizing the tail liquid, and discharging after reaching the standard. According to the method, accurate separation and high-valued utilization of four elements of aluminum, iron, silicon and magnesium are realized through a synergistic process of targeted recovery of silicon, gradient separation of iron and aluminum and selective precipitation of magnesium, and the problems of silicon resource waste, low element separation efficiency, insufficient product purity, secondary pollution and the like in a traditional process are thoroughly solved; all-component resource comprehensive utilization of desulfurized liquid resources is achieved.

The application provides a method for determining the content of aluminum by graphite furnace atomic absorption spectrometry. The method comprises the following steps: preparing an aluminum series calibration solution added with an alkali metal nitrate, determining the absorbance of the solution by using a graphite furnace atomic absorption spectrometer, and then drawing a standard curve with the determined absorbance as the ordinate and the content of aluminum in the aluminum series calibration solution added with the alkali metal nitrate as the abscissa; adding the alkali metal nitrate into a sample to be determined, determining the absorbance of the sample by using the graphite furnace atomic absorption spectrometer, and then calculating the content of aluminum in the sample to be determined according to the standard curve. The method can fully atomize the aluminum element, improve the measurement accuracy, and solve the problem of different atomization rates of sample water and calibration solution, and mask the interference of other metal oxides.

The invention provides an aluminum-doped nickel-cobalt-manganese ternary precursor and a preparation method and application thereof.According to the aluminum-doped nickel-cobalt-manganese ternary precursor, the relative molar content of manganese and aluminum in the aluminum-doped nickel-cobalt-manganese ternary precursor is increased in a gradient mode from inside to outside along the particles of the aluminum-doped nickel-cobalt-manganese ternary precursor, and the relative molar contents of the nickel element and the cobalt element are reduced in a gradient manner. According to the aluminum-doped nickel-cobalt-manganese ternary precursor provided by the invention, the internal nickel concentration is high, so that the high energy density is ensured; the relative molar contents of manganese and aluminum elements are increased in a gradient manner from inside to outside, so that a high-concentration manganese-aluminum coating layer can be formed on the surface of the precursor, the phenomena of crushing and internal collapse in the sintering process are relieved, and the thermal stability of the positive electrode material is further ensured; the doping of aluminum with relatively high concentration close to the surface can also relieve the surface crack propagation phenomenon, and the manganese with relatively high concentration can also ensure high structural stability.

The invention discloses a high-valued comprehensive utilization method of high-aluminum low-grade phosphorite. The method comprises the following steps: mixing high-aluminum low-grade phosphorite serving as a raw material with excessive phosphoric acid under the action of an aluminum dissolving inhibitor for acidolysis, and filtering after the reaction is finished to obtain an acidolysis solution and acid leaching residues; adding sulfuric acid into the acidolysis solution, continuously reacting, and filtering to obtain high-quality wet-process phosphoric acid and phosphogypsum; a sodium hydroxide solution is added into the acid leaching residues for an alkali dissolution reaction, and alkali dissolution residues and an alkali solution are obtained through filtering after the reaction is finished; and introducing CO2 into the alkali solution, and filtering, washing and drying after the reaction is finished to obtain the high-purity aluminum hydroxide. According to the method, the phosphorus element in the high-aluminum low-grade phosphorite enters the acidolysis solution through selective acidolysis, the aluminum element enters the acid leaching residues, and high-quality wet-process phosphoric acid and high-purity high-whiteness clean gypsum are produced while directional enrichment and efficient separation of the phosphorus element and the aluminum element are achieved; the aluminum element is recycled from the acid leaching residues through alkali dissolution, carbonation and calcination methods, and the high-added-value product nano aluminum oxide is prepared.

The invention relates to a preparation method of an aluminum-doped lithium lanthanum zirconium oxide solid electrolyte, and belongs to the technical field of solid electrolyte materials. Adding lithium carbonate, lanthanum oxide, zirconium oxide, aluminum nitrate and absolute ethyl alcohol into a ball milling tank for ball milling, drying, adding the modified aluminum ion chelating agent, mixing, grinding, sieving, putting into an aluminum oxide crucible, and pre-sintering to obtain an LLZO precursor; grinding and sieving the LLZO precursor, adding a polyvinyl alcohol solution, mixing, and pressing into a wafer; and placing the wafer in an alumina crucible, and carrying out high-temperature sintering to obtain the lithium lanthanum zirconium oxide solid electrolyte doped with the aluminum element. The modified aluminum ion chelating agent is prepared from (11-mercaptoundecyl)-trimethyl ammonium bromide, methylbenzene, biphenyl-4, 4 '-dithiol, triethylamine, lanthanum nitrate and stannous octoate; the lithium lanthanum zirconium oxide solid electrolyte prepared by the invention has relatively high room-temperature ionic conductivity and excellent chemical stability and interface stability.

The invention discloses a radiopharmaceutical waste curing treatment method which comprises the following steps: mixing expanded perlite and alumina powder, putting the mixture into a high-temperature furnace for heating, and carrying out high-temperature melting expansion to form closed-pore spherical vitrified micro-beads; the preparation method comprises the following steps: stirring and mixing closed-pore spherical glass beads, silica fume, nano-silica and an epoxy resin curing agent, and then adding a methylcellulose plasticizer and cerium oxide to form a base material; adding the pre-dried radiopharmaceutical waste into the base material, and uniformly stirring to form a mixture; injecting the mixture into a mold for molding and primary curing, and performing steam curing and environment curing after demolding to obtain a cured body; according to the present invention, the expanded perlite and the alumina powder are subjected to high temperature melting to prepare the closed-pore spherical vitrified micro-bead, the physical adsorption capacity of the porous structure of the closed-pore spherical vitrified micro-bead on the radioactive iodide ion is utilized, and the stable iodide generated by the aluminum element is combined to achieve the chemical bonding so as to reduce the iodine-131 escape problem in the high temperature environment;

The invention relates to the technical field of catalysts, and discloses a composite metal oxide, a preparation method and application thereof, and a dehydrogenation method of 1, 4-butanediol. The composite metal oxide comprises a copper element, a zirconium element and a metal M element, the metal M element is selected from at least one of a zinc element, an aluminum element, a manganese element, a titanium element and a cerium element, the zirconium oxide comprises ZrO2 and Zr3O1-x, and the value of x is greater than 0 and less than 1. The composite metal oxide provided by the invention is particularly suitable for the dehydrogenation reaction of 1, 4-butanediol, when the composite metal oxide is applied to the dehydrogenation reaction of 1, 4-butanediol, the reaction temperature can be reduced, the catalyst is high in activity, good in stability and high in target product selectivity, and in addition, the composite metal oxide provided by the invention does not contain Cr, and is environment-friendly and pollution-free.