2155 results about "Lanthanum" patented technology

Disclosed are a flux-cored welding strip and a welding flux used in combination for submerged arc welding of a duplex stainless steel, and preparation methods and use thereof. The flux-cored welding strip is composed of a stainless steel shell and a flux core powder, the flux core powder consisting of the following components: in percentages by mass, ferrochrome nitride: 0.70% to 1.0%, a chromium powder: 26% to 27%, a nickel powder: 4.5% to 5.5%, a molybdenum powder: 3.7% to 4.2%, a manganese powder: 2.55% to 2.65%, a copper powder: 1.45% to 1.55%, a ferrosilicon powder: 1.1% to 1.2%, a tungsten powder: 1.0% to 1.15%, a niobium powder: 0.25% to 0.35%, an aluminum powder: 0.35% to 0.55%, a rhenium powder: 0.35% to 0.40%, a lanthanum powder: 0.1% to 0.15%, and a balance being an iron powder.

The invention relates to the technical field of adsorbents, and particularly discloses an aluminum oxide type adsorbent and a preparation method thereof.The preparation method comprises the following steps that lanthanum salt, cerium salt and a polyethylene glycol aqueous solution are mixed to be uniform, then the mixture is mixed with gamma-Al2O3 to be uniform, pH is adjusted, standing is conducted, solid-liquid separation is conducted, drying and roasting are conducted, and a double-doped carrier is obtained; dispersing the double-doped carrier in a mixed solution containing 2-methylimidazole, ferric salt and zinc salt, adjusting the pH value, carrying out heating reaction, solid-liquid separation and drying in an inert atmosphere, grinding to obtain powder, and carrying out molding treatment on the powder to obtain a composite carrier; uniformly mixing the Ag modified molecular sieve with silica sol, coating the surface of the composite carrier with the mixture, and drying to obtain an adsorbent precursor; dipping an adsorbent precursor in the dispersion liquid, and after dipping, solid-liquid separation and drying, reactivating to obtain the aluminum oxide type adsorbent; the prepared adsorbent can synergistically and efficiently remove multiple impurities and is excellent in corrosion resistance.

The invention relates to the technical field of aluminum alloys, in particular to a high-fluidity corrosion-resistant aluminum alloy material for laser cladding as well as preparation and application of the high-fluidity corrosion-resistant aluminum alloy material. The material comprises the following components in percentage by mass: 3.12%-5.34% of nickel, 4.24%-6.76% of molybdenum, 6.54%-8.12% of cobalt, 10.45%-14.49% of silicon, 5.65%-8.45% of a functional additive, 1.25%-2.45% of cerium oxide, 3.46%-7.42% of yttrium oxide, 3.45%-7.58% of lanthanum oxide and the balance of aluminum, the functional additive is titanium carbide doped with Ti < 3 + >. The aluminum alloy material has high flowability during laser cladding and is well combined with a matrix, and related properties such as wear resistance, high temperature resistance, corrosion resistance and oxidation resistance of a coating formed by the aluminum alloy material are sufficiently uniform due to the high flowability of the aluminum alloy material.

The invention belongs to the technical field of tungsten filament processing, and relates to a lanthanum-doped fine tungsten filament wire drawing device and a wire drawing method.The lanthanum-doped fine tungsten filament wire drawing device comprises a machine frame, a mounting frame, a controller, a winding frame, a gear motor, a rotating shaft, a wire drawing mechanism, a heating mechanism and a cooling mechanism, the mounting frame is mounted on the machine frame, and the controller is mounted at the top of the machine frame; a winding frame is connected to the mounting frame, a speed reducing motor is mounted on the mounting frame, a rotating shaft is connected to an output shaft of the speed reducing motor, a wire drawing mechanism used for conducting wire drawing on tungsten wires is arranged on the mounting frame, and the wire drawing mechanism comprises a wire drawing die. And a heating mechanism and a cooling mechanism which are used for heating the tungsten filament are arranged in the wire drawing die. After wire drawing is completed, wire winding can be conducted through the wire winding wheel, in the wire winding process of the wire winding wheel, the gear rotates to drive the reciprocating lead screw to move back and forth in a reciprocating mode, and therefore the wire winding wheel is driven to move back and forth in a reciprocating mode, and tungsten wires are evenly distributed on the wire winding wheel.

The invention discloses a charcoal nano lanthanum material capable of synchronously removing organic phosphorus and inorganic phosphorus, and belongs to the field of environmental functional materials. The adsorbent comprises biochar and nano lanthanum loaded on the biochar, wherein the biochar is bamboo biochar; the nano lanthanum is in a La (OH) 3 form, the particle size of the nano lanthanum is 1-250nm, and the loading capacity of the nano lanthanum is 3-20wt%; the pore diameter of the biochar nano lanthanum material is 1-30nm, and the specific surface area is 100-250m < 2 > / g. Compared with a biochar-loaded nano lanthanum composite material in the prior art, the composite material has the inorganic phosphorus adsorption performance and also has the organic phosphorus adsorption effect, and inorganic phosphorus and organic phosphorus can be synchronously removed. According to the charcoal nano lanthanum material, organic phosphorus is adsorbed and removed by regulating and controlling the defect form of lanthanum, especially organic phosphonate can be hydrolyzed and removed, meanwhile, large pore channels of bamboo charcoal are beneficial to diffusion of macromolecular organic phosphorus to action sites of lanthanum, and the adsorption and hydrolysis effects of lanthanum on the organic phosphorus are further enhanced.

The invention discloses a special phosphorus removal agent for deep phosphorus removal and a preparation method and application thereof, and relates to the field of phosphorus removal agents and preparation methods thereof.The phosphorus removal agent is prepared from a porous precursor, an activating agent and a dispersing agent, and the porous precursor comprises at least one of aluminum oxide, iron oxide, calcium oxide and magnesium oxide; the activating agent comprises at least one of lanthanum salt, cerium salt, zircon salt, magnesium salt and ferric salt. By optimizing the composition of the porous precursor and activating treatment, the phosphorus adsorption capacity is remarkably improved, the phosphorus removal agent also plays a role in micro-flocculation in the process of mixed adsorption with sewage, a wet adding mode is adopted, the adding amount can be flexibly adjusted according to the phosphorus concentration condition of inlet water and outlet water, and the phosphorus removal efficiency is improved. The phosphorus removal agent can reduce the total phosphorus concentration in tail water of a sewage treatment plant to 0.5 mg / L or below.

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 discloses a large-aperture aluminum oxide loaded copper-based catalyst as well as preparation and application thereof. The large-aperture alumina-loaded copper-based catalyst comprises a large-aperture alumina carrier, and copper oxide and lanthanum oxide loaded on the surface of the large-aperture alumina carrier, the large-aperture alumina-loaded copper-based catalyst is granular, the specific surface area is 250-500 m < 2 > / g, the pore volume is 1.0-2.0 cm < 3 > / g, the average aperture is 16-30 nm, and the pore diameter of the large-aperture alumina-loaded copper-based catalyst is 20-30 nm. The large-aperture alumina supported copper-based catalyst comprises the following components in percentage by mass: 79%-98.9% of a large-aperture alumina carrier, 0.1%-6% of copper oxide and 1%-15% of lanthanum oxide. The large-aperture aluminum oxide loaded copper-based catalyst disclosed by the invention shows relatively high catalytic activity and higher alcohol selectivity in a reaction for preparing higher alcohol from ethanol, and particularly has relatively high C6-C10 fatty alcohol selectivity.

The invention discloses lanthanum-cerium mixed rare earth corrosion-resistant twisted steel with yield strength of 400MPa. The lanthanum-cerium mixed rare earth corrosion-resistant twisted steel comprises the following elements: 0.10 to 0.20 percent of C, 0.25 to 0.80 percent of Si, 0.90 to 1.60 percent of Mn, 0.020 to 0.045 percent of V, 0.003 to 0.010 percent of Ti, less than or equal to 0.010 percent of P, less than or equal to 0.010 percent of S, 0.25 to 0.65 percent of Ni, 0.25 to 0.70 percent of Cr, 0.10 to 0.18 percent of RE, less than or equal to 0.20 percent of Cu, less than or equal to 0.004 percent of O, less than or equal to 0.006 percent of N and the balance of Fe and inevitable impurities. The invention further discloses a production method of the lanthanum-cerium mixed rare earth corrosion-resistant twisted steel with the yield strength being 400 MPa. The production method comprises the working procedures of converter smelting, argon blowing refining, LF furnace refining, continuous casting and rolling, and the lanthanum-cerium mixed rare earth reinforced alloy cored wire and the silicon-calcium wire are fed into molten steel in the argon blowing refining process. The components, inclusions and mechanical properties of the produced 400 MPa-grade lanthanum-cerium mixed rare earth steel bar completely meet the technical requirements of the steel bar, the quality control requirement is met, and the 400 MPa-grade lanthanum-cerium mixed rare earth steel bar has the advantages of being high in strength, high in plasticity, resistant to corrosion and the like. The service life of the steel is prolonged, coating and galvanization are avoided, the burden of environmental protection is relieved, and reasonable application of resources is facilitated.

The invention relates to the field of anticorrosive paint, in particular to anticorrosive paint containing lanthanum cerium oxide and a preparation method of the anticorrosive paint. The invention relates to an anticorrosive coating containing lanthanum cerium oxide. The anticorrosive coating is prepared from the following raw materials: 28 to 45 parts of ultraviolet stable composite film forming matter, 5 to 10 parts of composite rare earth filler, 6 to 12 parts of supported synergistic antirust agent, 18 to 30 parts of mixed solvent, 0.8 to 2.5 parts of dispersing agent, 2.7 to 5.3 parts of functional additive and 0.5 to 1.2 parts of nano montmorillonite, the composite rare earth filler is lanthanum cerium oxide-hydroxyapatite composite powder with a core-shell structure, wherein lanthanum cerium oxide is used as a core, hydroxyapatite is used as a shell, and the thickness of the shell layer is 10-20 nm; the ultraviolet stable composite film forming substance comprises epoxy resin and ultraviolet grafting modified polyurethane in a weight ratio of 1: (0.6-2.2); the supported synergistic antirust agent is a mixture of mesoporous silica supported benzotriazole and zinc molybdate. And the obtained coating is high in adhesive force and long in service life.

The invention relates to a nickel-based alloy composite plate and a preparation method thereof, and belongs to the technical field of alloy preparation. The alloy reinforcing agent is prepared under the sintering condition of high-temperature reducing gas protection by mixing the lanthanum element and the nanometer aluminum oxide, the granularity can be refined in the smelting process by adding the alloy reinforcing agent, and the wear resistance, hardness, strength and oxidation resistance of the alloy are effectively improved. Nickel is used as a matrix, an alloy reinforcing agent and elements such as molybdenum, copper, boron and hafnium are added, meanwhile, a mixture of potassium chloride and magnesium fluoride is used as a fluxing agent, uniform mixing and reaction of alloy components are promoted, and the nickel-based alloy smelted through step-by-step heating in vacuum has high hardness and strength and good abrasion resistance, corrosion resistance and high temperature resistance; and the stainless steel substrate and the nickel-based alloy plate are tightly combined through welding treatment, and the nickel-based alloy composite plate is suitable for manufacturing a vacuum chamber.

The invention provides a method for providing composite luminescent particles, comprising: (a) providing (i) a luminescent material, comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor, wherein A comprises one or more of yttrium, lutetium, gadolinium, lanthanum; B comprises one or more rare earth elements; C comprises one or more of aluminum, gallium, and scandium; D comprises one or more transition metal ions; and wherein 0≤x≤1, 0≤y≤1, and x+y>0; and (ii) further providing a precursor of an oxide material, wherein said oxide material has a melting point of at least 850°C; (b) mixing said (i) luminescent material comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor and (ii) said precursor of an oxide material; (c) curing said precursor of said oxide material to obtain a cured particle, said cured particle comprising said luminescent material, and a coating of said oxide material; (d) heating said cured particle at a first temperature for a first duration, wherein said first temperature is 600 °C or higher, wherein said first duration is 10 minutes or more; and (e) heating said cured particle under a reducing atmosphere comprising carbon monoxide at a second temperature for a second duration, wherein said second temperature is 700 °C or higher, and wherein said second duration is 1 hour or more.

The invention provides an anti-ferroelectric lanthanum ferrite, bismuth ferrite and strontium titanate superlattice film with high energy storage density as well as a preparation method and application thereof. The anti-ferroelectric lanthanum ferrite, bismuth ferrite and strontium titanate superlattice film with high energy storage density comprises a substrate layer, a bottom electrode layer and a plurality of stacked relaxation ferroelectric layers, wherein the bottom electrode layer and the multiple stacked relaxation ferroelectric layers are sequentially arranged on the substrate layer; each relaxor ferroelectric layer sequentially comprises a first functional layer, a second functional layer and a third functional layer from bottom to top; the first functional layer comprises LaFeO3, the second functional layer comprises BiFeO3, and the third functional layer comprises SrTiO3. The anti-ferroelectric lanthanum ferrite, bismuth ferrite and strontium titanate superlattice thin film with the high energy storage density has small electric leakage performance and high polarization value, and more excellent energy storage performance is achieved.

The invention relates to the technical field of welding, in particular to a lead-free solder composition and a preparation method thereof. The composition comprises brazing filler metal and a brazing flux, wherein the brazing filler metal comprises 55 to 65 parts of copper, 30 to 40 parts of zinc, 0.5 to 1 part of silver, 0.1 to 1 part of tin, 0.1 to 0.5 part of nickel, 0.02 to 0.15 part of lanthanum, 0.03 to 0.15 part of cerium and 0.05 to 0.2 part of indium; the brazing flux comprises 18-22 parts of borax, 13-17 parts of boric acid, 25-32 parts of a potassium fluoride and potassium fluoborate compound, 3-5 parts of calcium fluoride, 12-16 parts of aluminum oxide and 8-11 parts of magnesium oxide. The lead-free solder composition does not contain toxic lead elements, pollution to the environment and the ecological system is little, the wettability, corrosion resistance, strength, stability and the like of the lead-free solder composition are improved, and the welding quality is comprehensively improved. According to the preparation method, uniform distribution and accurate control of the brazing filler metal and the brazing flux are guaranteed, stability and consistency of product quality are guaranteed, and the preparation method is easy and convenient to operate and suitable for mass production.

The present application relates to the technical field of tungsten alloy materials, and in particular to a tungsten alloy wire, a preparation method therefor, and a use thereof in cutting of a semiconductor material. The tungsten alloy is composed of the following elements in percentage by mass: 0.4-1.1 wt% of L, 0.001-0.25 wt% of Z, and the balance of tungsten and inevitable impurities, wherein L is one or more than two of lanthanum, cerium, praseodymium, neodymium, gadolinium and erbium, and Z comprises oxygen and carbon. The wire diameter of the wire is 20-60 μm, the wire contains linear L or a compound of L along the wire axis direction, and the radial average width D of L or the compound of L is smaller than or equal to 5 nm. According to the present application, the linear L element is doped between tungsten base bodies, and the radial average width of L is controlled to be smaller than or equal to 5 nm, so that the wire has the tensile strength of 5000 MPa or above under the wire diameter of 20-60 μm, and the machining performance of the tungsten alloy wire is enhanced.

The invention provides a rare earth heat insulation coating and a preparation method thereof. The coating comprises the following components in parts by weight: 50-60 parts of acrylic resin, 10-15 parts of polyurethane modified epoxy resin, 5-8 parts of nano rare earth powder, 3-5 parts of filler, 0.5-1 part of a coalescing agent, 1-2 parts of a defoaming agent, 1-3 parts of a dispersing agent, 0.5-1 part of an ultraviolet light absorber and 1-2 parts of a silane coupling agent. Wherein the nano rare earth powder comprises lanthanum oxide powder, cerium chloride powder and yttrium hexaboride powder, and the filler comprises nano hollow microspheres, nano calcium carbonate and nano aluminum silicate. The rare earth heat insulation coating has excellent heat insulation effect and mechanical property, and can be applied to various scenes.

The present invention relates to the technical field of tungsten alloy materials, and in particular to a tungsten alloy wire, and a preparation method therefor and a use thereof. The tungsten alloy is composed of the following elements in percentage by mass: 0.45-0.9 wt% of L, 0.05-0.2 wt% of oxygen, and the balance being tungsten and inevitable impurities, wherein L is one or more of lanthanum, cerium, praseodymium, neodymium, gadolinium, and samarium, the wire has a wire diameter of 20-60 μm, in the wire, L or compounds of L exist in the axial direction of the wire in a linear shape, and the average width D of L or the compounds of L in the radial direction is less than or equal to 5 nm. The element L is controlled to be doped between the tungsten base materials in a linear shape, and the average width D of L in the radial direction to be less than or equal to 5 nm, so that cracks and wire breakage caused by second-phase particles in the subsequent pressure machining process are greatly reduced, thereby guaranteeing the mechanical strength of the tungsten alloy wire, and thus the wire has a tensile strength of 5000 MPa or above under a wire diameter of 20-60 μm, and the machining performance of the tungsten alloy wire is enhanced.

The invention discloses a coating method for improving the ionic conductivity and air stability of a lithium lanthanum zirconium oxide solid electrolyte, which comprises the following steps: step 1, preparing an M element doped lithium lanthanum zirconium oxide solid electrolyte by adopting first sintering at the sintering temperature of 900-1000 DEG C and the heat preservation time of 6 hours, and taking out the M element doped lithium lanthanum zirconium oxide solid electrolyte; crushing and sieving the prepared blocky material to obtain a granular material higher than 100 meshes, and drying and storing the granular material in a polypropylene bottle; 2, the granular material is subjected to secondary low-temperature sintering, the M-element lithium lanthanum zirconium oxide material is coated with lithium nitride, the adding proportion of the lithium nitride is 0 wt%-0.9 wt%, the sintering temperature is 850-900 DEG C, the heat preservation time is 4 h, and after secondary coating sintering, the M-element lithium lanthanum zirconium oxide material coated with the lithium nitride is obtained through crushing and screening of 100 meshes; and step 3, pressing the finally sintered material in the step 2 into an electrolyte sheet through an isostatic press, and then carrying out third high-temperature sintering at the sintering temperature of 1200-1300 DEG C for 40 minutes to finally obtain the finished electrolyte sheet.

The invention relates to plasticity-enhanced lead lanthanum zirconium tin titanate-based antiferroelectric ceramic and a preparation method thereof. The chemical formula of the zirconium tin lead titanate lanthanum-based anti-ferroelectric ceramic is (Pb < 0.975-x > La < 0.02 > Sr < x >) (Zr < 0.5 > Sn < 0.37 > Ti < 0.13 >) < 0.9975 > O < 3 >, x is smaller than or equal to 0.10; and sintering by adopting a flash sintering technology to prepare the plasticity-enhanced lead lanthanum zirconate tin titanate-based antiferroelectric ceramic. Wherein the initial electric field intensity is set to be 100-300 V / cm, and the temperature rise rate of the flash sintering furnace body is 5-15 DEG C / min; when the reading of the current detector reaches the order of magnitude of [mu] A, the electric field intensity is increased to 200-500V / cm; after the current density value reaches 10-30 mA / mm < 2 >, the stable current density is kept for 90-200 s; preferably, the temperature rise rate of the flash burning furnace body is 8-12 DEG C / min.

The invention relates to the technical field of metal materials, and discloses a light high-strength zinc alloy and a preparation method and application thereof.The zinc alloy takes aluminum and magnesium as main alloy elements, scandium-yttrium pre-alloying components, cerium-lanthanum composite rare earth and a nano TiB2 particle reinforced phase are introduced, and grain refinement and interface strengthening are achieved through the synergistic effect of multiple components; the preparation method comprises the key processes of pre-alloy smelting, dynamic magnetic field assisted die casting, gradient aging treatment and the like, and the defects of melt oxidation and solidification are effectively controlled. The zinc alloy has low density, high specific strength, corrosion resistance and excellent surface treatment adaptability, is suitable for manufacturing of precise metal fasteners such as belt buckles, belt buckles and shoe buckles, can remarkably improve the anti-fatigue performance and appearance quality of products, meanwhile, reduces processing energy consumption and material loss, and meets the market requirements of light-weight and high-end hardware fittings.

The invention relates to a composite diaphragm with high ionic conductivity, a composite solid electrolyte and a preparation method thereof. The composite diaphragm is composed of a lithium lanthanum-based fluorine-doped solid electrolyte LLMOF and a base membrane, the chemical general formula of the LLMOF is Li < x > La < y > M < 1 > < z > M < 2 > < w > M < 3 > O < 6 > F, wherein M1 is a tetravalent cation, M2 is a pentavalent cation, and M3 is a hexavalent cation; 1 < x + 3y < 5, 0 < x < = 2, and 1 / 3 < y < 5 / 3; 0 < = z < = 2, 0 < = w < = 2, 0 < = u < = 2, z + w + u = 2; the base membrane is a large-aperture base membrane, and the aperture r is more than or equal to 200nm and less than or equal to 1mu m; the particle size D50 of the LLMOF is 50 nm to 1 [mu] m, and the particle size D50 of the LLMOF is less than or equal to the aperture r of the base film. According to the composite diaphragm disclosed by the invention, the LLMOF solid electrolyte with an ion channel function is introduced, so that efficient conduction of ions is realized; the particle size is matched with that of a large-aperture base membrane, the membrane can be uniformly embedded into membrane holes, a continuous conduction path is constructed, and the ionic conductivity is improved; meanwhile, the composite diaphragm has excellent thermal stability and interface wettability, interface impedance is effectively reduced, and growth of lithium dendrites is inhibited.

The present application provides an entropy-regulated composite dielectric film, which comprises a polymer matrix; and fillers dispersed in the polymer matrix, wherein the fillers comprise Bi 4‑a M 1a Ti (3‑3b) M 2b O 12 , wherein M1 comprises at least one of lanthanum, neodymium, samarium and praseodymium, M2 comprises at least one of zirconium, hafnium and tin, 0 The entropy-regulated composite dielectric film has high temperature resistance, high breakdown strength, high polarization strength, high energy storage density and good stability.

The invention discloses a blue-and-white glaze and a preparation method and application thereof, and belongs to the technical field of inorganic non-metallic materials (ceramics), the blue-and-white glaze comprises quartz, feldspar, limestone, plant ash and other basic raw materials, zinc oxide, aluminum oxide, lanthanum oxide, cerium oxide and other rare earth elements, and a modified organic additive is introduced. Compared with the prior art, the blue-and-white glaze shows excellent stability in the drying and firing process, the phenomena of cracking and glaze stripping are effectively reduced, the friction coefficient after firing is low, the breaking strength and the breaking modulus are high, the glossiness and transparency of a glaze surface are remarkably improved, and the blue-and-white glaze has important application value.

The invention provides a nanometer casting and doping double-strategy improved lanthanum manganese perovskite catalyst, a preparation method thereof and application of the nanometer casting and doping double-strategy improved lanthanum manganese perovskite catalyst in degradation of halogenated organic pollutants. The preparation method of the nanometer casting and doping double-strategy improved lanthanum manganese perovskite catalyst comprises the following steps: taking transition metal salt as a doping agent, and mixing transition metal salt, lanthanum salt, manganese salt and a complexing agent in a solvent to form a mixed solution; then adding nano silicon dioxide, stirring and heating to a gel state, and drying to obtain a solid precursor; calcining the solid precursor to obtain a calcined product which comprises nano silicon dioxide and transition metal doped lanthanum manganese perovskite; and adding the calcined product into an alkaline solution, and etching to remove the nano silicon dioxide to form a nano pore channel structure so as to prepare the nano casting and doping double-strategy improved lanthanum manganese perovskite catalyst. The nano casting and doping double strategies have a synergistic improvement effect on lanthanum manganese perovskite, and the catalytic performance of the obtained catalyst is remarkably superior to that of a single-strategy improved catalyst.

The invention provides a low-cost high-specific-surface-area cerium-aluminum composite oxide, a preparation method and application thereof, and relates to the technical field of catalysts, the preparation method comprises the following steps: step S1, adding 10-40% of cerium salt, 50-90% of aluminum salt and 0-10% of lanthanum source or zirconium source into deionized water, stirring and mixing, filtering, and washing to be neutral to obtain a cerium-containing solution; step S2, impregnating an alumina carrier in the cerium-containing solution prepared in the step S1, and standing to enable the cerium-containing solution to be impregnated on the alumina carrier, so as to obtain impregnated slurry; and S3, drying the dipping slurry, and then roasting in an inert atmosphere to obtain the cerium-aluminum composite oxide. The stable cerium-aluminum composite material is formed by doping one of lanthanum and zirconium with different masses into aluminum oxide or cerium oxide, the problem that the adsorption capacity of a traditional ammonia trapping method is limited is effectively solved, and the adsorption capacity of the material to ammonia is remarkably improved.

The invention relates to the technical field of copper alloys, in particular to a high-conductivity wear-resistant copper alloy and a preparation method and application thereof. A high-conductivity wear-resistant copper alloy comprises, by mass, 3-6% of nickel, 2-5% of tin, 1-3% of zinc, 0.1-0.5% of a rare earth element, 0.8-1.2% of a carbon nanotube-copper intermediate alloy and the balance copper, the rare earth element is one of cerium and lanthanum, the conductivity of the high-conductivity wear-resistant copper alloy is larger than or equal to 94% IACS, and the Vickers hardness of the high-conductivity wear-resistant copper alloy is larger than or equal to 120 HV. By regulating and controlling the mass ratio of nickel (Ni) to tin (Sn), adding the rare earth element and the carbon nanotube-copper intermediate alloy and accurately controlling the preparation process, the conductivity, wear resistance and mechanical property of the copper alloy material are remarkably improved, and the copper alloy material has wide application prospects in the fields of power transmission, high-speed transportation, ocean engineering and the like.

The invention discloses a lanthanum-doped CuMgAl catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method of the lanthanum-doped CuMgAl catalyst comprises the following steps: adding a copper salt, a magnesium salt, an aluminum salt and a lanthanum salt into water to obtain a first solution; adding a precipitator into water to obtain a second solution; adding the second solution into the first solution to adjust the pH value to 10.5 to obtain a mixed solution, stirring the mixed solution to generate a co-precipitation reaction, after the reaction is completed, carrying out aging treatment to promote growth and structure ordering of layered double hydroxide crystals, and then carrying out calcination treatment to convert a layered double hydroxide precursor into an oxide, thereby obtaining the layered double hydroxide. And the lanthanum-doped CuMgAl catalyst is obtained. The lanthanum-doped CuMgAl catalyst prepared by the preparation method disclosed by the invention has excellent activity and stability.

The invention discloses a catalyst for preparing gamma-butyrolactone through liquid phase dehydrogenation of 1, 4-butanediol as well as a preparation method and application of the catalyst. Belongs to the technical field of catalyst preparation. The catalyst is composed of a carrier, CuO and MOx, the CuO and the MOx are loaded on the carrier, Cu accounts for 10-50% of the total mass of the catalyst, M accounts for 1-25% of the total mass of the catalyst, M is one of Mn, Zn, Co, Ni, Fe, Cr, Ce, Nb, Ru, Pt, Ir and Pd, and the carrier is one of silicon oxide, aluminum oxide, magnesium oxide, lanthanum oxide, hydroxyapatite and magnesium-aluminum hydrotalcite. An oxide-oxide interface is formed between CuO and MOx through roasting and reduction, and relatively strong electron interaction exists between highly dispersed Cu nanoparticles and the oxide-oxide interface, so that the stability of the catalyst can be enhanced.

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.

A component for use in a semiconductor processing chamber is provided. A metal or metal alloy component body has a process-facing surface. An intermediate aluminum oxide coating is disposed on the process-facing surface, the intermediate aluminum oxide coating being at least 99% pure by weight and having a porosity of less than 0.1% by volume, the intermediate aluminum oxide coating having a first thickness. A process-exposed layer is disposed on the intermediate aluminum oxide coating, the process-exposed layer comprising at least one of yttrium, hafnium, zirconium, lanthanum, magnesium, and a lanthanide, the process-exposed layer being at least 99% pure by weight, having a porosity of less than 0.1%, and having a second thickness, the second thickness being less than or equal to the first thickness.