295 results about "Metallic Nickel" patented technology

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

The invention belongs to the technical field of preparation of high-quality metallic nickel connecting strips for new energy batteries, and provides a preparation process for optimizing residual stress of a metallic nickel stamping connecting sheet for a new energy battery, which specifically comprises the steps of material selection, striping, continuous die stamping, inert atmosphere protection annealing, and residual stress detection and control. The range of corners and chamfers of a stamping die adopted in the progressive die stamping is 0.2 mm-1 mm, and the fit dimensional tolerance of a female die and a male die of the stamping die is controlled to be + / -0.05 mm; and the stamping surface in contact with the metal nickel strip is processed by adopting an electrochemical corrosion milling method, the roughness Ra of the stamping surface is less than 0.4 mu m, and the hardness HRC is more than or equal to 55. The metal nickel connecting strip prepared through the method is low in residual stress and small in size deformation after being used, the service life of the metal nickel connecting strip is prolonged, safety and reliability of the metal nickel connecting strip are improved, and the application prospect is wide.

The invention provides a flux-cored wire, a manufacturing method of the flux-cored wire, a gas-shielded arc welding method and deposited metal. The flux core of the flux-cored wire comprises the following components in percentage by weight: 27.5 to 29.5 percent of rutile, 1.0 to 2.0 percent of ferrovanadium, 0.2 to 0.3 percent of bismuth oxide, 0.8 to 1.2 percent of cryolite, 12.5 to 15.0 percent of high-carbon ferrochrome, 5.0 to 6.5 percent of electrolytic manganese metal, 4.5 to 6.5 percent of metal nickel, 1.0 to 3.0 percent of feldspar, 1.5 to 2.5 percent of ferromolybdenum, 1.0 to 2.5 percent of aluminum-magnesium alloy, 32.0 to 35.0 percent of micro-carbon ferrochrome, 0.5 to 1.5 percent of ferrotitanium, 1.15 to 2.85 percent of fluorite, 0.8 to 2.0 percent of ferrosilicon and 0.6 to 1.5 percent of lithium carbonate. In the invention, the alloy content of deposited metal and the hardness of the surfacing layer are controlled by adjusting the percentage of the flux core in the total weight, the surfacing layer with excellent corrosion resistance and proper hardness is ensured to be obtained, and the service life of the wrapper roller is prolonged. And meanwhile, by controlling all the components in the flux powder of the flux-cored wire and the proportion, the flux-cored wire has excellent welding process performance.

The invention discloses a heat-resistant aluminum alloy material and a preparation method thereof, and relates to the technical field of metal material metallurgy, and the heat-resistant aluminum alloy material comprises the following components in parts by weight: 78-85 parts of pure aluminum ingot; 4-6 parts of electrolytic copper blocks; 1.5 to 2.5 parts of magnesium ingot; 0.8 to 1.5 parts of zinc particles; 2 to 3.5 parts of metal nickel powder; 0.1 to 0.3 part of titanium-aluminum alloy; 0.05 to 0.15 part of a zirconium-aluminum alloy; 0.08 to 0.2 part of scandium aluminum alloy; 0.05 to 0.12 part of a cerium rare earth metal block; according to the aluminum alloy material disclosed by the invention, the high-temperature performance of the aluminum alloy material is remarkably improved by optimizing the composition proportion of the alloy. Elements such as copper and nickel are added to form a stable strengthening phase, so that the high-temperature strength and the creep resistance are enhanced; due to introduction of rare earth elements cerium and scandium, crystal grains are refined, and the thermal stability of the material is improved; and through compound addition of zirconium and titanium, grain boundary migration at high temperature is further inhibited, the softening phenomenon is effectively delayed, and the material still keeps excellent mechanical properties and oxidation resistance in a long-term high-temperature environment.

The invention relates to a high-Ni alloy flux-cored wire for 9% Ni steel welding, which is prepared by coating a flux core with a nickel-based steel strip, and the flux core comprises the following components in percentage by weight: 18.0-30.0% of metal nickel powder, 5.0-8.0% of metal chromium powder, 5.0-9.0% of metal molybdenum powder, 1-2% of metal tungsten powder, 20.0-30.0% of rutile, 1.0-3.0% of quartz, 2.0-5.0% of albite, 1.0-3.0% of potassium feldspar, 0.5-3.0% of mica, 1.0-4.0% of cryolite, 0.2-0.8% of self-made raw material and the balance of reduced iron powder and inevitable impurities. The flux-cored wire belongs to a hastelloy system and is particularly suitable for welding of horizontal position welding and vertical position welding of the marine LNG storage tank, the mechanical performance of cladding metal of the flux-cored wire can reach 50 J or above at the low-temperature impact of-196 DEG C, the tensile strength is larger than 700 MPa, and the flux-cored wire is excellent in crack resistance and comprehensive performance.

The invention relates to the field of advanced ceramic materials, in particular to a ceramic matrix composite (CMC) and a preparation method thereof. The technical problems that a traditional CMC preparation technology is long in period, poor in structural uniformity and insufficient in toughness are solved. According to the method, surface-modified aluminum oxide ceramic microspheres are used as reinforcements, the surfaces of the microspheres are sequentially modified with hexagonal boron nitride nanosheets and a metal nickel catalyst, the microspheres, silicon carbide nanoparticles and a polycarbosilane precursor are mixed to form slurry, and a complex component is formed through multi-material additive manufacturing. A green body is prepared by using a 3D printing technology combining photocuring and material extrusion; carrying out ultraviolet curing on the green body, and carrying out staged heat treatment in an inert atmosphere, so that the precursor polymer is subjected to cross-linking curing, and meanwhile, carbon nanowires grow through in-situ catalysis; and finally, sintering under a pressurizing condition to realize matrix densification. The preparation period is greatly shortened, and the obtained composite material is uniform in structure, compact in matrix and excellent in mechanical property.

The invention provides base metal main grid slurry, a preparation method thereof and a photovoltaic cell. The base metal main grid slurry comprises 3-8 parts by mass of nickel powder, and the surface of the nickel powder is coated with a modified component; 0.5-1 part by mass of first glass powder; 0.5 to 1.5 parts by mass of second glass powder; 13-16 parts by mass of an organic phase; 0.2 to 0.5 part by mass of an organic auxiliary agent; 15-25 parts by mass of a first silver powder; and 45-60 parts by mass of a second silver powder. The base metal nickel is used for replacing part of silver powder, the wettability is improved through surface coating, meanwhile, glass elements are optimized, the glass softening point is reduced, the paste can be sintered at the low temperature, close combination of silver particles is facilitated, and the density and conductivity of a conducting layer are improved. According to the technical scheme, the sintering is compact, the conductivity is slightly higher than that of pure silver paste, and the effects that the efficiency is equal to that of the silver paste and the tension is slightly lower than that of the pure silver paste are achieved.

The invention provides a lithium battery valuable metal separation and recovery method based on multi-stage synergistic extraction. The method comprises the following steps: obtaining an electrode material from a waste lithium battery, and crushing and roasting the electrode material; carrying out multi-stage extraction on the roasted electrode material, and sequentially carrying out lithium element extraction, cobalt and nickel element extraction and manganese element extraction; and carrying out back extraction, separation and metal recovery on the lithium-containing organic phase, the cobalt-nickel-containing organic phase and the manganese-containing organic phase obtained by the multi-stage extraction to respectively obtain lithium carbonate, metal cobalt, metal nickel and manganese dioxide. According to the method, a multi-stage synergistic extraction process is adopted, a specific extraction agent and optimized extraction conditions are selected according to the properties of different valuable metals in the lithium battery, and the valuable metals are extracted in a graded and coordinated manner in combination with a pi-pi conjugated amphiphilic dissolution aid, so that the valuable metals such as lithium, cobalt, nickel, manganese and the like are efficiently separated and recycled, and the resource utilization rate is effectively increased.

The invention discloses a metal oxide / carbon / nickel composite material, a preparation method and application of the metal oxide / carbon / nickel composite material to a magnesium-based hydrogen storage material, and belongs to the field of hydrogen storage energy. The problems that a single-component catalyst in the MgH2 hydrogen storage material is low in active site, the interface is inactivated in the circulation process and the like are solved. A metal nickel source and a cerium source are combined with an organic ligand trimesic acid to form bimetal MOF, CeO2 / C / Nix obtained after calcination inherits the high specific surface area of MOF, metal is evenly dispersed in a carbon matrix, CeO2 / C / Nix is introduced into MgH2, microscale efficient catalysis of MgH2 is achieved, when the doping amount of CeO2 / C / Ni20 is 8 wt.%, the initial dehydrogenation temperature is 188.23 DEG C, and when the doping amount of CeO2 / C / Ni20 is 8 wt.%, the initial dehydrogenation temperature is 188.23 DEG C, and the specific surface area of CeO2 / C / Nix is 27.8 wt.%. After 10 cycles, the capacity retention rate is 98.8%, excellent hydrogen storage performance is shown, and a unique insight is provided for large-scale production of the magnesium-based hydrogen storage material.

This invention relates to the field of water electrolysis and hydrogen energy utilization technology, and provides an in-situ electrodeposition method for improving NiMoP. x O y A method for studying the catalytic activity and stability of a self-supporting nickel-based hydrogen evolution electrode (NMOP). First, NiMoP... x O y The / NF self-supporting foam nickel-based electrode is prepared by immersing it in a nickel salt solution for a certain period of time, drying it, and then immersing it in a sodium sulfate solution for electrodeposition reduction reaction. This invention provides a simple and convenient method for adjusting the amount of metallic nickel deposited, ensuring its distribution among the active component particles of the electrode. This effectively improves the adhesion of the active component and prevents its detachment, significantly enhancing the hydrogen evolution activity and stability of the hydrogen evolution electrode. At an industrial current density of 100 mA / cm², the overpotential of the modified electrode prepared by this method is reduced by approximately 20% compared to the unmodified electrode, and the charge transfer resistance is reduced by approximately 41%. After 30,000 CV cycle accelerated durability tests, the increases in overpotential and charge transfer resistance are less than 7% and 26% of those of the unmodified electrode, respectively. Therefore, this invention has promising prospects for industrial application.

This invention belongs to the field of metal powder preparation technology, and discloses a porous nickel powder, its preparation method, and its applications. The method includes: preparing nickel oxalate powder as a precursor; forming a nickel coating layer on the surface of the nickel oxalate powder by chemical plating to obtain nickel oxalate@nickel core-shell structured composite particles; subjecting the composite particles to pyrolysis annealing treatment, causing the internal nickel oxalate to decompose and generate gas, and the external nickel coating layer to transform into a porous metal framework, thereby obtaining porous nickel powder. This method is simple, low-cost, and produces nickel powder particles with uniform size, stable pore structure, good connectivity, and large specific surface area, making it suitable as a precursor for electrocatalytic active materials or porous electrode materials.

This invention discloses a transition metal phosphide catalyst, its preparation method, and its application, belonging to the field of electrocatalysis technology. The process includes: firstly, dissolving nickel salt, lanthanum salt, urea, and ammonium fluoride in deionized water to synthesize a nickel-lanthanum layered hydroxide nanosheet precursor via a hydrothermal method; secondly, preparing a lanthanum-doped nickel phosphide catalyst using a phosphating reaction; and thirdly, utilizing a lanthanum doping strategy to modulate the electronic structure of nickel phosphide and improve its electrocatalytic reaction performance. This lanthanum-doped nickel phosphide material exhibits good catalytic activity when used to catalyze hydrogen evolution and sulfide ion oxidation reactions. In an integrated two-electrode electrolyzer for sulfide ion oxidation-assisted hydrogen production, it outputs 10 mA cm⁻¹. ‑2 This invention achieves the goal of producing hydrogen and high-value-added sulfur products with low energy consumption by requiring a relatively low voltage of 0.525 V at a current density. It has advantages such as simple preparation process, controllable operating conditions, and low raw material costs, possessing the potential for large-scale production and serving as a high-performance catalyst for electrocatalytic hydrogen production and sulfur ion oxidation reactions.

The invention belongs to the technical field of environmental science and water treatment, and particularly relates to a PLA-Ni-coated MOF composite membrane and a preparation method and application of the PLA-Ni-coated MOF composite membrane. Comprising a porous polylactic acid substrate film constructed by 3D printing, a metal nickel layer arranged on the surface of the polylactic acid substrate film, and a ZIF-8 nanoparticle layer arranged on the surface of the metal nickel layer, the metal nickel layer is arranged between the polylactic acid substrate film and the ZIF-8 nanoparticle layer. The PLA-Ni-coated MOF composite membrane has a three-stage hierarchical composite structure of a PLA substrate membrane, a nickel coating and a ZIF-8 particle layer, is stable in structure and excellent in performance, has good mechanical strength and acid and alkali resistance stability, and is suitable for large-scale industrial oil-water separation.

The invention provides a transition metal nickel complex as well as a preparation method and application thereof. The transition metal nickel complex has a structure as shown in a formula (I), wherein R1, R2, R3, R4 and R5 are independently selected from the following groups substituted by one or more Ra: H, C1-6 alkyl, C1-6 alkoxy, C6-20 aryl or C6-20 heteroatom aryl. The complex provided by the invention has higher catalytic activity and stability in catalysis of olefin polymerization, especially for polymerization of ethylene, has very strong regulation and control performance on the molecular weight of polyethylene, and can be used for preparing highly branched polyethylene.

The invention discloses a method for preparing monophenol compounds from lignin. The method comprises the following steps: mixing a raw material lignin with a solvent, and carrying out a one-step hydrogenation reaction in a hydrogen atmosphere under the action of a nickel-molybdenum-based catalyst to prepare the monophenol compound, the nickel-molybdenum-based catalyst comprises metal nickel and nickel oxide, molybdenum oxide and silicon oxide. The method provided by the invention has the characteristics of low production cost, simple separation, high monophenol compound yield and the like.

The invention relates to the technical field of all-vanadium redox flow battery electrodes, and discloses a three-dimensional carbon nanotube modified graphite felt and a preparation method and application thereof.The preparation method includes the following steps that carbon nanotubes are subjected to vapor deposition on the graphite felt twice, phthalocyanine is loaded on the graphite felt through solvothermal, then metal nickel is removed through cleaning, and the three-dimensional carbon nanotube modified graphite felt is obtained; the conductivity can be effectively improved by loading the carbon nanotubes on the graphite felt, and the three-dimensional structure can effectively increase the catalytic active sites of the graphite felt, so that the energy efficiency and the voltage efficiency of the all-vanadium redox flow battery are improved.

The invention discloses a rare earth element modified nickel-based nano-catalyst and a preparation method and application thereof.The rare earth element modified nickel-based nano-catalyst comprises a carrier and an active component loaded on the carrier, and the carrier is cerium dioxide and yttrium oxide co-doped three-dimensional ordered silicon dioxide nanoparticles; the active component is metal nickel. The application refers to the application of the catalyst in preparation of synthesis gas through carbon dioxide methane reforming. According to the invention, rare earth element doped and modified three-dimensional ordered silicon dioxide nanoparticles are used as a carrier, nickel metal is loaded on the nanoparticles, and the problem of carbon deposition can be effectively reduced by adjusting the interaction of alkaline sites and oxygen vacancies on the surface of the catalyst and the metal carrier. The method provided by the invention is helpful for realizing industrialization of a carbon dioxide methane catalytic reforming reaction, realizing a carbon emission reduction target and solving a green electricity energy storage problem.

The invention provides a method for removing ferrous iron in a nickel chloride solution through efficient oxidation promotion, belongs to the technical field of purification treatment of chlorination system solutions, and solves the problem that free ferrous iron in the nickel chloride solution cannot be effectively oxidized and converted into ferric iron in the prior art. Controlling the concentration of main metal nickel ions, and adding a corresponding amount of hydrogen peroxide into the nickel chloride solution for stirring according to the content of impurity Fe in the nickel chloride solution; injecting the stirred nickel chloride solution into an electrolytic bath, heating, and raising the temperature of the nickel chloride solution in the bath; and the cathode and the anode in the electrolytic bath are conducted, and the introduced nickel chloride solution is subjected to electrolytic treatment, so that divalent iron in the nickel chloride solution can be converted into trivalent iron. The process flow is simple, the production process is easy to control, the facility equipment investment is low, and the final benefit is remarkable.

The application relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method thereof. The high-temperature-resistant flux-cored wire containing rare earth elements comprises a wire sheath and a core; the core comprises the following raw materials: dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, aluminiferous iron, potassium cryolite, potassium titanate, sodium titanate, iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, chromium-iron nitride, bismuth oxide, an additive, and the balance of reduced iron powder; the additive is a mixture of zirconium-iron alloy, ferrotitanium alloy and aluminum-magnesium alloy. The application introduces a specific alloy additive into the core to protect the transition of the rare earth yttrium, optimizes the welding performance of the yttrium and multiple components in cooperation, matches the 253MA heat-resistant steel, adjusts the components of the molten slag and the electric arc, and reasonably processes the technology, so that the welding quality of the wire is improved.

The application relates to the technical field of fluorine-containing iodoalkane preparation, in particular to a preparation method of high-carbon-number diiodoperfluoroalkane, which comprises the following steps: reacting tetrafluoroethylene and elemental iodine to generate diiodotetrafluoroethane; and under the action of a catalyst, the diiodotetrafluoroethane is subjected to telomerization reaction with tetrafluoroethylene to generate high-carbon-number diiodoperfluorobutane and diiodoperfluorohexane; and the catalyst is a metal nickel catalyst supported on silicon dioxide. The metal nickel catalyst supported on silicon dioxide is used to make the diiodotetrafluoroethane and the tetrafluoroethylene subjected to telomerization reaction to obtain diiodoperfluoroalkane with higher carbon number. The application has the advantages of simple process, low reaction temperature and the like, and can significantly improve the yield of diiodoperfluorobutane and diiodoperfluorohexane.

The application discloses a preparation method of baricitinib, and belongs to the technical field of drug synthesis. The method comprises the following steps: firstly, 2-[1-(ethylsulfonyl)-3-azetidinyl]acetonitrile and 4-pyrazole boron pinacol ester are subjected to a Michael addition reaction to obtain 1-(ethylsulfonyl)-3-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]-3-azetidine acetonitrile as an intermediate I; secondly, a protection group is introduced on the amino group of 4-chloropyrrolopyrimidine to obtain an intermediate II; finally, the intermediate I and the intermediate II are subjected to a Suzuki coupling process by adopting a method of combining a nickel pre-catalyst with a supporting ligand to obtain the baricitinib. The preparation method creatively realizes cross coupling of the baricitinib by adopting the cheap metal nickel as a catalyst, avoids the use of a heavy metal palladium catalyst, and has the advantages of low cost, low toxicity, small pollution, green environmental protection and the like.

The invention relates to the technical field of metal powder metallurgy processing, and discloses a double-phase reinforced nickel-based composite material and a preparation method thereof, and the composite material comprises a metal nickel matrix and a double-phase reinforced phase. The preparation method comprises the following steps: taking graphite powder, target carbide element powder and nickel powder, ball-milling, mixing and smelting to obtain an alloy compound melt; the alloy compound melt is subjected to ultrasonic spray granulation, and nickel powder of endogenous carbide particles is prepared; immersing the nickel powder of the endogenous carbide particles into the precursor solution, and heating and stirring to obtain nickel powder particles; and carrying out cold press molding on the nickel powder particles, heating, pressurizing, curing and sintering under vacuum, and cooling to room temperature to prepare the structure-controllable double-phase reinforced nickel-based composite material. The preparation method is simple, efficient and low in cost, and the prepared product is light in weight, high in strength and toughness, resistant to abrasion and corrosion and suitable for manufacturing of equipment parts operating in a severe environment.

The invention discloses a self-supporting metal electrode-zero-valent nickel catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing metal nickel salt, a precipitator, a template agent and water to form a precursor solution; and soaking a pretreated metal electrode in the precursor solution for reaction, and then carrying out annealing treatment in an inert atmosphere so as to grow a zero-valent nickel material on the surface of the metal electrode in situ, thereby preparing the self-supporting metal electrode-zero-valent nickel catalytic material. The zero-valent nickel in the self-supporting metal electrode-zero-valent nickel catalytic material prepared by the invention can be stabilized by the self-supporting metal electrode and is not easy to agglomerate and oxidize, and meanwhile, regulation and control of catalytic activity can be realized through interface interaction with an oxide layer on the surface of the electrode. The catalytic material can show high hydrogen evolution activity and stability under acidic conditions, and has high activity and long-term stability when being used in PEM water electrolysis hydrogen production reaction.

This invention provides a composite cathode material for lithium-sulfur batteries, its preparation method, and its application. The preparation method of the composite cathode material for lithium-sulfur batteries provided by this invention includes: firstly, using carbon fiber cloth as a substrate, depositing a nickel source on the surface of the carbon fiber cloth, and then heat-treating the carbon fiber cloth with the deposited nickel source in an inert gas atmosphere to form metallic nickel nanoparticles and create pores within the carbon fiber cloth; after heat treatment, etching with an acid solution to remove the metallic nickel nanoparticles and obtain a porous carbon fiber framework; secondly, in-situ generating a bimetallic sulfide NiCo2S4 on the porous carbon fiber framework; finally, melting and combining the porous carbon fiber framework with the in-situ grown bimetallic sulfide NiCo2S4 with elemental sulfur to obtain the composite cathode material for lithium-sulfur batteries. The composite cathode material provided by this invention can significantly suppress the shuttle effect of the lithium-sulfur battery cathode, improve sulfur loading and reaction kinetics, thereby obtaining a high-performance lithium-sulfur battery.

The application provides a tungsten particle and a preparation method and application thereof, and the preparation method comprises the following steps: growing tungsten particles in a nickel-iron alloy system to obtain a tungsten-nickel-iron alloy; then preparing the tungsten-nickel-iron alloy into an alloy powder; then heating the alloy powder to 1550-1800 DEG C for melting, and then carrying out solid-liquid separation or static stratification, crushing to obtain the tungsten particles; the tungsten particles are obtained by growing tungsten powder in a nickel-iron alloy system first, and then separating the tungsten and the nickel-iron binder phase by density stratification or through a special device, so that the tungsten and the nickel-iron binder phase are separated, and the tungsten particles with uniform particle size are obtained; compared with the prior art, the method of the application overcomes the problems of environmental pollution and separation efficiency in the preparation process of the tungsten particles in the prior art, and can efficiently prepare the tungsten particles with uniform particle size.

The invention discloses a high-precision light guide plate injection mold and a light guide plate, the injection mold comprises a bottom plate, a supporting assembly, a lower mold plate, a lower mold core, a splicing block, an upper mold plate and an upper mold core, the supporting assembly is installed on the bottom plate, and the supporting assembly comprises a plurality of supporting blocks used for supporting the lower mold plate and adjusting the height of the lower mold plate; a metal nickel layer is plated on the upper side of the lower mold core, a plurality of V-cut grooves which are uniformly arranged and parallel to one another are formed in the metal nickel layer, the cross section of each V-cut groove is in an inverted isosceles trapezoid shape, and inverted V-shaped convex strips are arranged between the adjacent V-cut grooves; a plurality of lattice point combination bodies are arranged on the lower side of the upper mold core, and each lattice point combination body is composed of three lattice point pits which are shaped and arranged in a shape like a Chinese character'pin '. According to the lower mold core and the upper mold core, the brightness of the light guide plate subjected to injection molding can be greatly improved, the anti-pressure capability is high, the problem of interference fringes is avoided, and the problem that the light guide plate is adhered to the upper mold core can be avoided; according to the invention, the distance between the lower mold core and the upper mold core can be precisely controlled.

The application discloses an electrolytic water oxygen evolution catalyst coating material, a preparation method and application thereof, and relates to the technical field of electrolytic water catalysis. The electrolytic water oxygen evolution catalyst coating comprises a metal nickel framework, a spinel type manganese cobalt oxide and a spinel type nickel cobalt oxide. The metal nickel framework has a porous structure, which is beneficial to the contact of the electrode and the electrolyte and the escape of gas. The metal oxide can expose more active sites. The metal framework in the substrate and the coating can enhance the conductivity of the entire electrode system. The electrolytic water oxygen evolution catalyst coating material has the advantages of low preparation cost, high catalytic activity and good stability, and is beneficial to improving the hydrogen production efficiency of electrolytic water and promoting the wide use of hydrogen energy.

The invention discloses a low-energy laser combustion improver and a safe ignition method. The combustion improver comprises the following raw materials in percentage by weight: 1-5wt% of phosphorus-containing ligand, 3-8wt% of sulfur-containing ligand, 1-3wt% of metal nickel salt, 1-5wt% of accelerant and the balance of organic solvent. The invention provides a low-energy laser combustion improver and a safe ignition method, the low-energy laser combustion improver can ignite an object to be ignited through low-energy laser at a certain interval at a lower environment temperature, so that the ignition safety of explosives is improved, and the low-energy laser combustion improver can also be used in activities such as performance, magic and celebration; the combustion improver is simple and easy to prepare, free of tedious procedures and harsh conditions, capable of being prepared in an amplified mode, convenient to industrialize, relatively low in price and suitable for popularization.

This invention belongs to the field of catalyst technology and discloses a nitrogen-doped carbon-supported cobalt-nickel dual-site ORR-OER catalyst and its preparation method. The catalyst has the molecular formula CoNi-MOF@ACW and the structure is a dodecahedral CoNi-MOF grown on nitrogen-doped biomass carbon ACW with Co and Ni in an atomically dispersed state. Preparation method: (1) Prepare nitrogen-doped biomass carbon ACW; (2) Prepare a complex of metallic nickel and PI-PINi; (3) Dissolve water-soluble zinc salt, water-soluble cobalt salt and PINi together in methanol to obtain solution A; (4) Add 2-methylimidazole to methanol to obtain solution B; (5) Add ACW to solution A, stir evenly and then add solution B, continue stirring evenly; (6) Take out the solid material to obtain the precursor CoPINi-MOF@ACW; (8) Wash CoPINi-MOF@ACW with methanol and then dry; (9) Embed CoPINi-MOF@ACW with NH4Cl and pyrolyze to obtain the target catalyst. The catalyst of this invention has extremely high ORR-OER bifunctional catalytic activity and stability.

The application discloses a cobalt vacancy regulated hollow multi-shell nickel cobalt oxide catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: mixing glucose, a zinc salt, a cobalt salt, a nickel salt and water, and obtaining the cobalt vacancy regulated hollow multi-shell nickel cobalt oxide catalyst through a hydrothermal reaction, calcination and etching. According to the preparation method, the zinc salt, the cobalt salt, the nickel salt and the glucose are used as raw materials, the metal nickel, cobalt and zinc are cross-linked on polysaccharide to form a network structure through the hydrothermal reaction, and then the surface carbon and metal zinc are removed through the calcination and the etching, so that the cobalt vacancy regulated hollow multi-shell nickel cobalt oxide catalyst with a stable hollow multi-shell structure is formed. The preparation method has the advantages of simple process, safe raw materials, low cost and batch production. The cobalt vacancy regulated hollow multi-shell nickel cobalt oxide catalyst prepared by the method has the advantages of good catalytic activity, high degradation efficiency, good stability, strong anti-interference property and low metal ion leaching rate.