124 results about "Zn element" patented technology

The invention provides an aluminum alloy brazing composite material, an Al-Zn-based pre-buried brazing flux plate blank and a preparation method of the Al-Zn-based pre-buried brazing flux plate blank and relates to the technical field of aluminum alloys, and the aluminum alloy brazing composite material sequentially comprises a non-brazing filler metal layer and a brazing filler metal layer; the non-brazing filler metal layer sequentially comprises a core layer and an Al-Zn-based pre-embedded brazing flux layer, and the Al-Zn-based pre-embedded brazing flux layer is arranged close to the brazing filler metal layer; the Al-Zn-based pre-embedded brazing flux layer comprises an Al-Zn alloy and a fluorine-containing brazing flux; the Al-Zn series alloy comprises 1-12 wt% of Zn element according to the mass fraction, the Al-Zn based pre-buried brazing flux layer has dislocation, and the dislocation density of the Al-Zn based pre-buried brazing flux layer is 2.5-4.0 * 10 < 14 > / m < 2 >; and the core layer and the Al-Zn-based pre-embedded brazing flux layer cannot be melted during brazing. The problem that the yield strength after welding is insufficient due to the fact that the proportion of the core layer in the aluminum alloy brazing composite material is reduced can be solved.

The present invention discloses a catalyst for dehydrogenating cyclohexanol to cyclohexanone, a preparation method thereof and an application thereof. The catalyst comprises a silica support and active components and active promoters uniformly loaded on the silica support; the active components include copper element, zinc element and magnesium element; the active promoter is selected from borate. The catalyst for dehydrogenating cyclohexanol to cyclohexanone disclosed by the present invention greatly enhances the interaction between the silica support and the active components, and significantly improves the long-term stability of the catalyst on the basis of ensuring that the catalyst has excellent catalytic activity and selectivity.

The invention provides an anodic oxidation die-casting aluminum alloy and a preparation method thereof. The anodic oxidation die-casting aluminum alloy comprises the following elements in percentage by mass: 2-4% of Mg element, 0.2-2% of Si element, 1.6-2.4% of Mn element, 0.2-0.3% of Cu element, less than or equal to 2% of Zn element, less than or equal to 0.2% of Fe element, less than or equal to 0.2% of inevitable impurities and the balance of Al, wherein the sum of the mass content of the Mg element and the mass content of the Zn element is 2-4%; the surface chromatic aberration of the anodic oxidation die-casting aluminum alloy is lt; the white brightness L is larger than or equal to 85, the tensile strength ranges from 180 MPa to 210 MPa, the yield strength ranges from 80 MPa to 120 MPa, and the elongation ranges from 3% to 5%. The anodic oxidation die-casting aluminum alloy has excellent flowability and surface glossiness, and is good in surface quality and high in yield.

The low-temperature welding method comprises the steps that firstly, abrasive paper is adopted for polishing the surfaces of a copper substrate and an aluminum substrate, then a welding clamp is adopted for fixing the aluminum substrate, then an interconnection interface of the aluminum substrate is filled with proper Sn0. 3Ag0. 7Cu alloy powder, the aluminum substrate is placed on a constant-temperature table to be heated after being covered with the copper substrate, and the copper substrate and the aluminum substrate are welded at the same time. And simultaneously applying ultrasound and pressure to the copper substrate and the aluminum substrate, and continuously keeping the temperature and the pressure after the ultrasound is stopped until the experiment is finished. The prepared connector is free of zinc element, the copper-aluminum connector with the (Sn) + Al2Cu + AlCu ternary eutectic is formed and has good plasticity and toughness, the welding method is easy to operate, the welding temperature is low, the welding time is short, the production cost is reduced, and the production efficiency and the product reliability are greatly improved.

The invention discloses a 6-series high-strength aluminum alloy plate for an automobile and a preparation method of the 6-series high-strength aluminum alloy plate, and belongs to the technical field of aluminum alloy preparation. The plate comprises the following metal element components in percentage by mass: 0.7%-1.0% of Si, 0.2%-0.3% of Fe, 0.5%-0.9% of Cu, 0.15%-0.3% of Mn, 0.6%-1.0% of Mg, 0.15%-0.25% of Cr, 0.05%-0.1% of Zn, more than or equal to 0.2% and less than or equal to 0.35% of Cr and Zn, and the balance of Al and inevitable impurities. The preparation method comprises the following steps: smelting and casting according to alloy components and proportions to obtain a cast ingot, homogenizing, carrying out hot rolling and coiling, cooling, carrying out cold rolling and coiling, carrying out solid solution treatment, carrying out pre-aging treatment, and detecting whether the mechanical property meets the requirements or not. By adding the Cr and Zn elements and controlling the adding amount of the Cr and Zn elements, the obtained aluminum alloy plate is high in strength, good in plasticity and low in anisotropy.

The invention provides an aluminum alloy wire and a preparation method thereof. The aluminum alloy wire comprises the following elements in percentage by mass: 0.1 to 7.0 percent of Zn element, 0.2 to 9.6 percent of Mg element, 0.1 to 6.0 percent of Cu element, 0.01 to 1.2 percent of Mn element, 0.1 to 2.0 percent of Fe element, 0.1 to 2.5 percent of Si element, less than or equal to 0.15 percent of inevitable impurities and the balance of Al element, the surface brightness L of the aluminum alloy wire is greater than 60, and the surface brightness color difference E is less than or equal to 0.5; the average roughness Sa is less than or equal to 0.4 mu m, and the maximum peak height Sp is less than or equal to 2.0 mu m; the aluminum alloy wire does not crack after 85% compression deformation; under the test conditions that the temperature is 35 DEG C, and the aluminum alloy wire is placed in a mixed solution of a 57g / L NaCl solution and a 10mL / L H2O2 solution to be soaked for 6 hours, the corrosion depth of the aluminum alloy wire is smaller than or equal to 10 micrometers.

The invention provides a cast rare earth magnesium alloy and a preparation method thereof, and relates to the technical field of magnesium alloys. The cast rare earth magnesium alloy is prepared from the following elements in percentage by mass: 4.5 to 6.50 percent of Gd element, 0.5 to 2.0 percent of Y element, 0.05 to 1.2 percent of Nd element, 0.05 to 0.5 percent of Er element, 0.3 to 1.2 percent of Zn element, 0.3 to 0.6 percent of Zr element, less than or equal to 0.1 percent of total content of inevitable impurities, less than 0.05 percent of single impurity and the balance of Mg element. By adding the Gd element, the Y element, the Nd element and the Er element, the basal texture of the magnesium alloy can be weakened, and the plasticity is improved. And the content of each element is controlled within the range, so that the interaction among the elements can be improved, and the magnesium alloy can realize good strength and plasticity synergy.

The invention discloses a method for preparing a Raney nickel electrode through electro-deposition of nickel-zinc alloy and application. The method comprises the steps that a nickel-based substrate is pretreated; the pretreated nickel-based substrate serves as a cathode, an electrochemical deposition reaction is carried out in an electrolytic bath containing electroplating liquid, and the electroplating liquid comprises nickel salt and zinc salt; carrying out heat treatment on the nickel-based substrate subjected to electrochemical deposition; and activating the nickel-based substrate subjected to heat treatment to remove the zinc element to obtain the Raney nickel electrode. According to the Raney nickel electrode, valence electrons can be redistributed by depositing the nickel-zinc alloy phase on the nickel substrate, so that electron transmission is accelerated, and the conductivity of the electrode is improved; the nickel-zinc alloy is slow and uniform in reaction in the activation process, nickel-zinc crystal nucleuses can be uniformly nucleated and grow, and a uniform pore structure can be formed after activation, so that the active area of the catalyst is greatly increased, and the hydrogen reaction rate is increased.

The invention provides a high-entropy alloy carbon nano composite fiber membrane, zinc element and one or more metal elements of iron, cobalt, nickel, magnesium, manganese and copper are compounded and concentrated on the surface of carbon nanofiber in a metal oxide form, the diameter of the carbon nanofiber in the composite fiber membrane is 100-600nm, the fiber is of a porous structure, and the specific surface area is 80-450m < 2 > / g; the fiber membrane is prepared by the following steps: adding metal salt and / or a metal oxide precursor into a solvent, stirring and dissolving to obtain a metal salt precursor dispersion liquid, adding polyacrylonitrile, heating and stirring to obtain a composite fiber membrane spinning solution, and carrying out electrostatic spinning, pre-oxidation and carbonization treatment. The prepared composite fiber membrane is high in evaporation rate and high in output current and voltage, and can be applied to the field of water and electricity co-production.

The invention discloses an ammoxidation catalyst and a preparation method and application thereof, the active component of the catalyst is represented by a general formula MoxBiaFebAcBdCeDfEgFhOy, A represents at least one element selected from the combination of a nickel element, a cobalt element, a manganese element, a zinc element and a cadmium element; b represents at least one element selected from the group consisting of magnesium, strontium and barium elements; c represents at least one element selected from a combination consisting of potassium, rubidium and cesium elements; d represents at least one element selected from the group consisting of a tungsten element, a vanadium element, a chromium element, a gallium element, a germanium element, a scandium element, an yttrium element, an indium element, a tin element, and an antimony element; e represents at least one element other than promethium element among lanthanide elements; f represents at least one element among platinum group elements. According to the present invention, the composition ratio of the active components of the catalyst is regulated according to the action mechanism of the metal catalyst, such that the comprehensive performance of the catalyst is improved, and the high trinitrile product yield and the low trinitrile yield material consumption are provided.

The invention provides an anodic oxidation die-casting aluminum alloy and a preparation method thereof. The anodic oxidation die-casting aluminum alloy comprises the following elements of, by mass, 0.01%-1% of Mg element, 0.01%-2% of Zn element, 0.01%-2% of Si element, 0.01%-1% of Ni element, 0.2%-0.5% of Fe element, 1.6%-2.4% of Mn element, 0.1%-0.2% of Cu element, 0.02%-0.2% of Ti element, the total content of inevitable impurities smaller than or equal to 0.2%, and the balance Al element. Wherein the sum of the mass content of the Mg element and the mass content of the Zn element is 1-3%, the sum of the mass content of the Si element and the mass content of the Ni element is 0.1-2.5%, and the sum of the Fe element, the Si element and the Ni element is 0.1-3%. The aluminum alloy can be better used for producing thin-wall piece products with the thickness of 0.8-1.8 mm.

The invention relates to shot-blasting-free treatment liquid for zinc-based coating hot forming steel, a preparation method and application of the shot-blasting-free treatment liquid, and relates to the technical field of steelmaking. Wherein the shot-blasting-free treatment liquid comprises 95 to 98 parts of a solvent; the composition comprises the following components in parts by weight: 0.2 to 0.3 part of an organic modifier, 1 to 4 parts of an inorganic film-forming agent, 0.1 to 0.4 part of an organic chelating agent, 0.2 to 0.4 part of a stabilizer, and 0.1 to 0.3 part of a surface improving agent. The shot-blasting-free treatment liquid forms a compact and uniform composite protective film on the surface of zinc-based coating steel. The protective film is converted into an inert layer with high-temperature oxidation resistance in the heat treatment process, and contact between oxygen and a zinc coating is effectively blocked, so that oxidation and volatilization of zinc at high temperature are remarkably reduced, the generation amount of ZnO and the loss of zinc element are reduced, the protective effect of the coating in the heat forming process is ensured, and the service life of the coating is prolonged. The product treated by the shot-blasting-free treatment liquid and processed by the hot forming process is clean in surface, controllable in surface oxidation product and free of an additional shot-blasting process.

The invention belongs to the field of selective laser melting rapid prototyping, and discloses a TiCN nanoparticle-containing magnesium alloy for selective laser melting and application thereof, and the TiCN nanoparticle-containing magnesium alloy powder for selective laser melting comprises the following components by mass: 8.5-9.5% of Al element, 0.5-0.9% of Zn element, 0.2-0.4% of Mn element, 1.5-2.5% of TiCN nanoparticles, less than or equal to 0.1% of impurity, and the balance of Mg element. The TiCN nanoparticles are introduced into the magnesium alloy, the selective laser melting process is matched, the mechanical property of the correspondingly obtained SLM magnesium alloy forming part is good, the ductility of the forming part is further improved through the refined and uniform magnesium alloy grain structure and dispersively distributed nano TiCN, and the tensile strength, the yield strength and the creep fracture life of the forming part are all improved.

The invention discloses a 7-series aluminum alloy material and a preparation method thereof, and belongs to the field of aluminum alloy preparation.The 7-series aluminum alloy material and the preparation method thereof have the advantages that on the basis of optimizing components of 7-series aluminum alloy, the proportion and the process of the components are properly adjusted, it can be guaranteed that the tensile strength, the yield strength and the ductility meet the use requirements on the whole, and the corrosion resistance can be further improved; by adding the Zn element and the Mg element, the strength and hardness of the 7-series aluminum alloy can be remarkably improved, a proper Cu or Cr ratio can reduce residual phases (a T-Al2Mg3Zn3 phase, an AlZnMgCu phase or an AlZnMgCr phase), but after solution treatment, the residual phases gradually disappear, all alloy elements can be dissolved in a matrix in a solid mode, an AlFe phase is reduced, then corrosion sites are reduced, and by combining the synergistic effect of the Mn element and the V-containing refiner, the corrosion resistance of the 7-series aluminum alloy is improved. The crystalline phase in the 7-series aluminum alloy is refined, so that the mechanical property of the 7-series aluminum alloy can be obviously improved, and the corrosion resistance of the 7-series aluminum alloy can be obviously improved.

The invention discloses a squeeze casting preparation method of a high-toughness and high-plasticity aluminum-copper alloy, and relates to a squeeze casting preparation method of an aluminum alloy. The method aims to solve the technical problems that an existing aluminum alloy casting formed through extrusion casting is uneven in structure and not high in density, and strength and plasticity are difficult to synchronously improve. A proper amount of Zn element and Mg element are added into the aluminum-copper alloy, Mg and Cu are combined to generate an S-Al2CuMg phase, the thermal stability of the S-Al2CuMg phase is superior to that of a theta phase, dislocation movement can be hindered through dispersed distribution of the S phase, and meanwhile the fatigue life of the alloy is prolonged. According to the preparation method, the mass fraction ratio of Zn to Mg is properly reduced, so that the precipitation rate of the S phase is increased, the extrusion casting process is combined for forming, the T6 heat treatment process is carried out after forming, the alloy performance is further strengthened, the high-toughness and high-plasticity aluminum-copper alloy is prepared, and the tensile strength under the room temperature condition ranges from 400 MPa to 460 MPa.

To provide a method for producing an oxide sintered body, in which a content of impurities is significantly reduced.SOLUTION: A method of the present invention for producing an oxide sintered body uses, as a raw material, an oxide containing two or more elements selected from In element, Ga element, and Zn element and satisfies the following conditions (a) to (c). An oxide having a purity of 6 N or more is used as the raw material. A grinding and mixing medium is formed of an oxide containing no element other than the elements selected as the raw material. Ultrapure water is used as a dispersion medium to form a slurry.SELECTED DRAWING: None

The invention provides ultra-fine grain high-yield bronze and a preparation method thereof, and belongs to the technical field of copper alloy manufacturing. The added tin can form a continuous solid solution with copper, has a wide single-phase region, and can obviously improve the mechanical property and corrosion resistance of copper; by adding phosphorus, the flowability of a melt can be improved, the problem of element segregation of a cast ingot can be remarkably reduced, phosphorus serves as an effective deoxidizing agent of the copper alloy, the adverse effect of oxygen in the copper alloy is reduced, and therefore the strength and hardness of the copper alloy are effectively improved, in addition, phosphorus can reduce product air suction in horizontal continuous casting, and the physical performance of bronze can be improved; iron can remarkably improve the strength and hardness of the copper alloy; nickel can generate an amplitude-modulated decomposition structure with tin and copper, so that the strength of the copper alloy is remarkably improved; the zinc element can improve the fluidity of copper alloy melt, reduce segregation of the copper alloy and improve the structure uniformity of the cast ingot, so that the copper alloy cast ingot can obtain high-strength and high-hardness bronze through combined deformation.

The invention provides a nickel hydroxide material and a preparation method thereof, and relates to the technical field of nickel-metal hydride batteries. The nickel hydroxide material is of a spherical composite structure and sequentially comprises a multi-element doped nickel hydroxide matrix, a hydroxyl cobalt oxide middle layer and an outer lithium modification layer which are arranged from inside to outside, at least one of a zinc element, an aluminum element and a magnesium element is doped in the nickel hydroxide matrix. According to the nickel hydroxide material, through a unique spherical composite structure and a specific element doping strategy, the electrochemical performance and the structural stability of the material are remarkably improved, and the nickel hydroxide material has a wide application prospect in high-performance battery application.

The invention discloses a preparation method of a lightweight high-strength plastic Mg-Li-Zn-Gd alloy bar, which comprises the following steps: (1) in an argon atmosphere, selecting alloy raw materials according to the mass percentage, heating and melting to prepare an alloy melt; (2) carrying out casting molding on the alloy melt to obtain an alloy ingot; (3) preheating the alloy ingot, and performing extrusion forming to obtain an extruded bar of the magnesium-lithium alloy; and (5) carrying out rotary forging deformation treatment on the extruded bar at room temperature. Gadolinium (Gd) with a grain refinement effect and zinc (Zn) with a solid solution strengthening effect are added into a magnesium-lithium alloy system to serve as main alloying elements, meanwhile, nano precipitated phases such as Mg3Zn3Gd2 and MgZn2 in the alloy and segregation of the Zn element near the precipitated phases are regulated and controlled through the extrusion-rotary forging process, and therefore the strength and plasticity of the alloy are improved; the yield strength of the light high-strength plastic magnesium-lithium alloy bar reaches 276 MPa, and the tensile strength of the light high-strength plastic magnesium-lithium alloy bar is 303 MPa; the ductility is 24%; and the density is 1.565 g / cm < 3 >.

The invention belongs to the technical field of composite aluminum alloy, and discloses an aluminum alloy composite board and a corrosion-resistant aluminum alloy composite board. The aluminum alloy composite board is of a double-layer structure which comprises a core layer and a corrosion-resistant layer; the core layer comprises a Si element, a Fe element, a Cu element, a Mn element and a Mg element, and the anti-corrosion layer comprises a Zn element, the Si element and the Fe element; the corrosion-resistant aluminum alloy composite board is obtained by carrying out zinc impregnation treatment on the aluminum alloy composite board. And after zinc impregnation treatment, the difference value between the potential of a Zn-element-free diffusion area of the anti-corrosion layer and the potential of the innermost layer of the core layer is smaller than or equal to 150 mV. The corrosion-resistant aluminum alloy composite board shows excellent layered corrosion in a corrosion environment.

The invention belongs to the technical field of blast furnace smelting, and particularly discloses a method for discharging a zinc element in a blast furnace. The method comprises the steps of zinc discharge triggering condition judgment, charge level lowering operation, heat system and slagging system control, air volume and top pressure control, charging system adjustment and safety monitoring, specifically, zinc discharge operation is triggered through cycle management or furnace condition fluctuation, the charge level is lowered to 13-15 m and maintained for 2-3 h, the furnace top temperature is controlled to be 300-350 DEG C, and the furnace top temperature is controlled to be 30-35 DEG C; the load is reduced to 3.5 before the material is reduced, the load is controlled to be 2.4-2.6 during the period, the air volume is gradually reduced from the initial value being less than or equal to 4200Nm < 3 > / min, and the ore coke angle is synchronously adjusted by 0.5 degree when the material line is 4-15m and the ore coke is lifted every 1m. The zinc element is efficiently and safely discharged, the zinc circulation enrichment mechanism is effectively broken, and stable operation of the blast furnace is guaranteed.

The invention provides a 7xxx series aluminum alloy plate strip for anodic oxidation with a high recovery ratio and a preparation method of the 7xxx series aluminum alloy plate strip. The 7xxx series aluminum alloy plate strip comprises the following elements of 0.06%-0.12% of Si element, 0.10%-0.25% of Fe element, 4.5%-5.5% of Zn element, 2.0%-3.0% of Mg element, 1.2%-2.0% of Cu element, 0.05%-0.15% of Mn element, 0.10%-0.15% of Er element, 0.10%-0.12% of Zr element, 0%-0.03% of Ti element and the balance aluminum element. The aluminum alloy plate strip is prepared through the steps of reclaimed material grading pretreatment, low-liquid-level semi-continuous casting, multi-stage homogenizing heat treatment, hot rolling, cold rolling, solid solution, pre-stretching, two-stage aging and the like. Through joint optimization of material components and the process, the finished plate strip has excellent mechanical performance, an oxidation film is uniform in color and luster, and salt mist resistance, friction resistance and the like are achieved.

The invention relates to the technical field of new materials, in particular to an Al-Cu-Li-Mg-Ag-Zn-Mn-Zr series high-strength and high-heat-resistance aluminum lithium alloy and a preparation method thereof. According to the invention, Al-Cu-Li-Mg-Ag-Zn-Mn-Zr is used as an alloy system, a certain amount of Cu, Li, Mg and Ag alloy elements are added to obtain a core-shell structure strengthening phase T1-AgMg phase which is stable at a high temperature, a certain amount of Zn element is added to improve the intrinsic stability of the T1 phase, and a certain amount of Mn and Zr alloy elements are added to obtain strengthening phases of a T phase and an Al3Zr phase. The novel high-strength and high-heat-resistance aluminum-lithium alloy with excellent tensile property at room temperature, 250 DEG C and 300 DEG C is obtained by combining proper preparation processes such as casting, homogenization, thermal deformation, solid solution aging and the like.

The application discloses a composite coating with inert plating layer for reducing hot forming crack of high-strength steel, which is in a double-layer composite form and is obtained by pre-plating a layer of plating layer on the surface of high-strength steel, wherein the pre-plating layer contains at least one of B, Al, Cr, Cu, Mo and W elements, and the elements have positive mixing enthalpy with Zn element, that is, inert interaction with liquid Zn atoms. A conventional Zn plating layer is plated on the pre-plating layer. The thickness of each plating layer in the double-layer plating layer is 1-30 microns. The plating layer for reducing the hot forming crack tendency of high-strength steel combines chemical composition, element interaction and other factors, so that the liquid Zn atoms which are easy to penetrate along the grain boundary in the hot forming process are repelled by the plating component atoms in the pre-plating layer, the penetration of the liquid Zn atoms into the grain boundary of the steel base body is prevented, and the formation of the hot forming crack is reduced or even avoided. Through reasonable regulation and control of the element ratio of the plating layer, the purpose of effectively reducing the crack tendency of different types of high-strength steel in the hot forming and resistance spot welding processes can be achieved.

The present invention discloses a high-toughness and easily soluble magnesium alloy and a preparation method thereof. The high-toughness and easily soluble magnesium alloy contains the following components by mass percentage: 1% to 6% of Zn element, 1% to 4% of Ni element, 0.2% to 4% of element A, 0.2% to 1% of element B, and the balance is Mg element; the element A is at least one of Gd element and Y element, and the element B is at least one of Ga element and In element; the high-toughness and easily soluble magnesium alloy contains 3 kinds of intragranular precipitation phases with regular shapes, and the intragranular precipitation phases are basal plane-oriented MgZn phase, prism plane-oriented MgZn phase, and non-oriented MgNi phase. The high-toughness and easily soluble magnesium alloy of the present invention simultaneously has high strength, high elongation rate, and high dissolution rate. The tensile strength at room temperature is ≥240 MPa, the yield strength is ≥160 MPa, the elongation rate is ≥8%, and the dissolution rate in water at room temperature is ≥30 mg·cm<supgt;‑2< / supgt;·h<supgt;‑1< / supgt>.

The invention discloses a method for preparing a porous nickel electrode by electrodepositing nickel-zinc-phosphorus alloy, which comprises the following steps: taking a nickel-based substrate as a cathode, and carrying out electrochemical deposition reaction in an electrolytic bath filled with an electroplating solution which comprises nickel salt, zinc salt and a phosphorus source; carrying out heat treatment on the nickel-based substrate subjected to electrochemical deposition; and the nickel-based substrate subjected to heat treatment is put into alkali liquor to be activated. The phosphorus source is introduced into the electroplating solution, the phosphorus element can be doped into alloy crystal lattices, and the dissolution efficiency of zinc is improved during activation, so that the residual quantity of the zinc element is effectively reduced, the activation time is shortened, sufficient formation of a porous structure is facilitated on the premise of ensuring the uniformity of the porous structure, the catalytic performance of the electrode is improved, and the service life of the electrode is prolonged. And the residual zinc element is prevented from polluting the electrolyte.

The invention relates to a catalyst and a preparation method and application thereof, the catalyst is a NiZnFe-LTH catalyst, in the catalyst, the molar ratio of a nickel element to a zinc element is 1: (0.1-10), and the ratio of the total mole number of the nickel element and the zinc element to the mole number of an iron element is (2.5-3.5): 1. According to the NiZnFe-LTH catalyst with the specific composition, the catalytic activity and stability of the catalyst are jointly improved through mutual cooperation of three transition metal elements, and efficient and stable decomposition of ozone under the condition of relatively high relative humidity is facilitated.

The present invention relates to a black granular zinc composite. 【Solution means】(a) Zinc element or zinc alloy metal in an amount c in the range of 58.0 to 85.0% by weight with respect to the composite, (b) ZnO, and (c) a further material, this further material (the amount of c) c Zn、M is in the range of 4.5 to 17.0% by weight with respect to the total amount of the composite material, and components (b) and (c) are at least partially mixed with the zinc element or zinc alloy metal (a). The black zinc particles are used as a corrosion inhibitor pigment. The particles are produced by a dry grinding process under severe conditions where they are incorporated into the pigment after the grinding process in the presence of an abrasion aid. add ​

The invention relates to the technical field of functional drinking water preparation, and discloses multi-element compound functional drinking water and a preparation method thereof. Aiming at the defects of serious element antagonism, high heavy metal residue risk, single function and the like in the prior art, the scheme innovatively adopts a five-stage gradient feeding process: an ion buffer system is established by preferential dissolution of calcium and magnesium, and stable retention of iron and zinc elements (the oxidation rate of Fe < 2 + > is less than or equal to 3%) is realized by shading treatment; elements easy to hydrolyze are fixed by a citric acid-titanoxyl complexing technology (the dissolution rate of titanium is greater than or equal to 99%), calcium and magnesium precipitation is inhibited by dynamic pH regulation (4.0-6.0), and nano-scale uniform dispersion (D50 is less than or equal to 100 nm) of 19 elements is realized by combining ultrasonic cavitation (45kHz) and 0.22 mu m terminal filtration. A gradient cooling (0.8 DEG C / min) and sodium citrate synergistic stabilization technology is originally created, so that the shelf life is prolonged.

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.