68results about How to "Improve densification performance" patented technology

The invention belongs to the field of thin films, and particularly discloses an atomic layer deposition method and a thin film prepared through the atomic layer deposition method. According to the deposition method, the reaction cavity, the two input pipeline systems, the outlet valve and the vacuum pump in the atomic layer deposition system are used for controlling precursor pulse deposition and inert gas purging conditions in the atomic deposition process, and the film deposition state is improved; the efficiency of purging and removing substances and impurity residues such as a precursor and a reaction product thereof is improved, the problem that the quality of a deposited film is affected by the impurity residues in a reaction system or on the surface of a sample in the film deposition process is avoided, the uniformity and compactness of film deposition and the coverage rate and conformal rate of a film on the surface of a base material hole are improved, the defects of the film are reduced, and the yield is improved. And the method can be applied to a substrate with a high aspect ratio structure to deposit the film, so that the purpose of manufacturing a large-size complicated special-shaped structure device is achieved.

The invention discloses a silver-coated copper powder preparation method based on nickel layer enhanced palladium catalysis and active hydrogen synergistic deposition, and relates to the technical field of powder surface treatment. The method specifically comprises the following steps that copper powder is soaked in acid liquor, then filtering, washing and drying are conducted, and pretreated copper powder is obtained; immersing the pretreated copper powder into a hydrochloric acid solution of nickel chloride hexahydrate, and then filtering, washing and drying to obtain sensitized copper powder; immersing the sensitized copper powder into a hydrochloric acid solution of palladium chloride, and then filtering, washing and drying to obtain activated copper powder; mixing the activated copper powder with the reduction solution to obtain a solid-liquid mixture, adding a silver-ammonia solution into the solid-liquid mixture, heating for reaction, and filtering after the reaction is finished to obtain a solid product; and washing and drying the solid product to obtain the silver-coated copper powder based on nickel layer enhanced palladium catalysis and active hydrogen synergistic deposition. The silver-coated copper powder with a compact silver layer and high binding force is prepared through the ternary synergistic effect of nickel layer sensitization, palladium nanometer activation and formaldehyde reduction.

The invention relates to a corrosion-resistant cable sheath material and a preparation method thereof, and relates to the technical field of cable materials, the corrosion-resistant cable sheath material comprises the following raw materials by weight: 95-105 parts of a base material, 5-10 parts of polyvinylpyrrolidone, 10-18 parts of modified zinc oxide, 1-2 parts of an antioxidant, 0.4-0.8 part of a vulcanizing agent, and 4-8 parts of a plasticizer. Compared with the prior art, the special modified zinc oxide and the polyvinylpyrrolidone in a proper K value range are mainly introduced, and all the components have a synergistic effect, so that the corrosion-resistant stability of the material is remarkably improved, the service life of the cable is prolonged, and the use requirements in the field of submarine underwater cable sheaths are met.

The invention relates to a high-entropy ceramic capacitor, a ceramic dielectric material for the high-entropy ceramic capacitor and a preparation method, the raw material composition of the ceramic dielectric material comprises NaNbO3, (Na0. 2Bi0. 2Ba0. 2Mg0. 2Zn0. 2) TiO3, H3BO3, CaZrO3 and the like, by controlling the raw material ratio and preparation process parameters of sodium niobate and adopting a multi-step grinding synthesis method, NaNbO3-based high-entropy ceramic is designed, so that the insulation resistance of the high-entropy ceramic capacitor is effectively improved; on the other hand, chemical modification treatment is carried out by introducing (Na0. 2Bi0. 2Ba0. 2Mg0. 2Zn0. 2) TiO3, H3BO3, CaZrO3 and the like, so that the structural stability of an antiferroelectric phase is enhanced, the compactness of the material is improved, and finally, the energy storage performance of the material is optimized and improved.

The invention provides a lithium-rich manganese-based positive electrode material, a preparation method thereof and a lithium ion battery containing the lithium-rich manganese-based positive electrode material, and belongs to the field of lithium ion batteries. The chemical formula of the lithium-rich manganese-based positive electrode material is xLi < 2 > MnO < 3 >. (1-x) LiTMO2, 0 lt, xlt; 1, TM is selected from Ni, Co and Mn; the lithium-rich manganese-based positive electrode material comprises a monoclinic Li2MnO3 phase and a rhombic LiTMO2 phase, the content of the monoclinic Li2MnO3 phase is sequentially reduced from inside to outside, the content of the rhombic LiTMO2 phase is sequentially increased from inside to outside, and a spinel phase layer is arranged on the surface of the lithium-rich manganese-based positive electrode material. The lithium-rich manganese-based positive electrode material prepared by the method has the advantages of high thermal stability, high compactness and high cycle performance.

This invention discloses a black-based blue-spotted glaze with an earthworm-like pattern and its preparation method. The glaze consists of a body, a black base glaze, and a blue-spotted glaze from the inside out. The raw materials for the black base glaze are: feldspar, calcite, calcium borate, dolomite, talc, barium carbonate, quartz, bentonite, zirconium silicate, rutile, cobalt oxide, manganese oxide, and iron oxide. The raw materials for the blue-spotted glaze are: feldspar, limestone, alumina, talc, barium sulfate, Datong clay, zinc oxide, quartz, and titanium dioxide. The preparation method includes: 1. Wet ball milling the black base glaze raw materials to obtain a black base glaze slurry; 2. Wet ball milling the blue-spotted glaze raw materials to obtain a blue-spotted glaze slurry; 3. Bisque firing the body; 4. Applying the black base glaze slurry to the body and drying it; 5. Applying the blue-spotted glaze slurry to the body and drying it; 6. Oxidation firing and reduction firing of the body, followed by natural cooling to obtain the black-based blue-spotted glaze. The raw material formula of this invention is reasonable and environmentally friendly, which can improve the mechanical properties of the glaze; the preparation method is simple and the yield is high.

This invention discloses a silver paste material for low ESR stacked solid-state capacitors, its preparation method, and the capacitor thereof. The silver paste material is prepared by a method comprising the following steps: S1, organic carrier preparation: mixing a main solvent, a co-solvent, a dispersant, and a plasticizer to obtain an organic carrier; S2, low-speed mixing: first adding all the required proportions of spherical silver powder to the organic carrier and stirring at low speed, then adding flake silver powder in batches and continuing to stir until a uniform paste is formed. By weight percentage, the components of the silver paste material include: 20%~35% flake silver powder, 20%~30% spherical silver powder, 10%~20% main solvent, 2%~4% co-solvent, 13%~30% binder, 2%~4% dispersant, 1%~3% defoamer, and 1%~3% plasticizer. This invention protects the morphological integrity of flake silver powder, forming a dense conductive network. The total silver powder content can be as low as 40wt%. The preparation process is simple, reducing material costs and achieving the best balance between electrical performance and cost. It is suitable for high-power applications such as AI servers, 5G communications, and new energy vehicles.

The invention relates to the technical field of brake disc materials, and discloses a brake disc material prepared from a carbon-ceramic composite material and a processing technology thereof.The processing technology comprises the following steps that phenolic resin, carbon powder, metal oxide, composite carbon fibers and a pore forming agent are evenly mixed and then placed in a mold, and a composite material prefabricated body is obtained through compression molding and cold water demolding; processing the composite material preform to form a carbon-ceramic brake disc rough blank, and then performing carbonization treatment to obtain a carbonized composite material; and mixing the carbonized composite material with silicon powder, carrying out siliconizing treatment, soaking in a protective solution, sintering, taking out, polishing and perforating to obtain the brake disc material prepared from the carbon-ceramic composite material. The composite carbon fiber contains a large number of silicon hydroxyl groups and can be tightly combined with phenolic resin, carbon powder, metal oxide and a pore-forming agent, and the polycarbosilane layer generates a nanoscale silicon carbide phase, so that the mechanical property and wear resistance of the brake disc material prepared from the carbon-ceramic composite material can be improved.

This invention relates to the field of concrete pouring equipment technology, and discloses a high-speed railway three-wall concrete pouring device, including a box body with a funnel-shaped bottom and four legs fixedly installed at the bottom corners. Each leg has a roller fixedly installed at its bottom end. The device also includes a discharge pipe, one end of which is fixedly installed through the bottom of the box body for discharging concrete from the box body; and a material feeding mechanism installed between two opposing legs on the same side for driving the discharge pipe opening to swing. This invention uses a stepper motor to drive a reciprocating screw to rotate, causing the screw to move a moving block threaded to its outer surface along the guide rod axis. This allows the moving block to move the opening of the discharge pipe's movable end via a mounting plate, enabling the discharge pipe to evenly spread concrete across the area to be poured.

The invention discloses essential oil microcapsule powder with high oil loading capacity and a preparation method thereof, and belongs to the technical field of microcapsules, the preparation method comprises the following steps: preparing a gelatin aqueous solution, preparing an Arabic gum aqueous solution, preparing an Arabic gum-starch aqueous solution, preparing a chitosan-tannic acid aqueous solution, preparing an emulsion, and performing primary crosslinking. Performing secondary crosslinking; the essential oil microcapsule powder prepared by the invention not only has high oil loading capacity and low surface oil content, but also has excellent slow release performance, solubility, long-term controlled release performance and flowability, and is uniform in particle size distribution.

This application provides a two-step flocculation adaptive control method for tailings slurry based on FBRM online monitoring, relating to the field of tailings treatment technology in the mineral processing industry. The method includes: online monitoring of the original tailings slurry using focused beam reflection measurement under no-doping conditions to obtain the particle size baseline characteristics of the original slurry; adding a primary flocculant to obtain a first slurry, and monitoring the dynamic particle size characteristics of the flocs during the flocculation process in real time; based on the dynamic particle size characteristics of the first slurry, determining whether the first slurry has reached a ready state suitable for secondary flocculation according to a preset primary flocculation completion criterion; when the first slurry reaches the ready state, automatically initiating the addition of a secondary flocculant to obtain a second slurry, and providing real-time feedback on the particle size distribution change in the second slurry as a control signal to adaptively adjust the dosing rate of the secondary flocculant. This method can automatically adapt to changes in ore properties, solid content, and operating conditions, and has strong potential for widespread application.

The application provides a degradable plugging material and a preparation method and application thereof, and belongs to the technical field of oil field chemicals; the plugging material takes lactide, aliphatic diol, epichlorohydrin, acid anhydride compound, aromatic diglycidyl ester and aliphatic monoamine as main raw materials, first prepares double-end hydroxyl-terminated polylactic acid, then modifies the double-end hydroxyl-terminated polylactic acid by epichlorohydrin to obtain double-end epoxy-terminated polylactic acid, then reacts with the acid anhydride compound to generate aromatic polyester compound containing a polylactic acid segment, and finally obtains degradable plugging material particles through low-temperature freezing, ball milling and surface modification treatment. The obtained material can effectively fill mud cake pores and micro cracks, and improve the plugging and filtration reduction performance of drilling fluid; meanwhile, the material contains a hydrolysable polyester structure, has temperature response degradation characteristics in a high-temperature clean water environment, can meet the requirements of early plugging stability and late degradation and plugging removal, and is suitable for downhole operation fields such as oil and gas field drilling, temporary plugging and reservoir protection.

The utility model discloses a die-casting die coating device which comprises a coating device body, a cleaning assembly, a moving assembly and a fixing assembly, a spraying machine is installed at the top end of the interior of the coating device body, and an air dryer is arranged on one side of the interior of the coating device body; the cleaning assembly is arranged in the coating device body and used for cleaning the coating before coating. The moving assembly is arranged on the top of the cleaning assembly and used for moving the die-casting die. The fixing assembly is arranged on one side of the moving assembly and used for fixing the die-casting die. According to the die-casting die cleaning device, a closed space is provided through the arranged sliding door, chemical cleaning liquid is prevented from volatilizing, pollution to air is reduced, harm to the body health of workers is reduced, cleaning liquid is arranged in the cleaning base to soak a die-casting die, surface pollutants are effectively removed, lifting of the die is controlled through the sliding plate and the threaded rod, and the die-casting die cleaning device is simple in structure and convenient to use. And complete infiltration of the die-casting die is ensured. And the rotating rod and the air dryer are matched to help the mold to be quickly dried after being cleaned, and finally, a coating is coated by using a spraying machine, so that the uniformity and adhesive force of the coating are improved, and the compactness of the coating is improved.

The application discloses an inorganic silicon modified water-based corrosion and rust prevention paint containing functional polysiloxane as well as a preparation method and application thereof. The paint contains, in parts by weight, 30-60 parts of a water-based hybrid acrylic emulsion, 1-15 parts of functional polysiloxane, 5-25 parts of inorganic silicon-based corrosion inhibitor filler, 10-40 parts of pigment and filler, 1-5 parts of water-based additive, and the balance of water. The functional polysiloxane is amino or silanol / alkoxy functionalized polysiloxane emulsion; and the inorganic silicon-based corrosion inhibitor filler is a combination of calcium ion exchange type silica gel pigment and calcium silicate. The inorganic hybrid emulsion, the functional polysiloxane and the inorganic silicon corrosion inhibitor pigment are compounded to endow the coating with excellent physical shielding property, active corrosion inhibition and surface hydrophobicity, realize fast drying, high hardness, excellent water and salt fog resistance and long-acting corrosion prevention performance, and especially can adapt to the harsh requirements of marine environment for the water-based corrosion prevention paint, which has important significance for the development of the shipbuilding industry.

This invention discloses a waterborne epoxy curing agent, its preparation method, and its application, belonging to the field of waterborne epoxy coating technology. It solves the problems of slow drying speed, poor flash rust resistance, inadequate water and salt spray resistance, and reliance on organic solvents in existing waterborne epoxy curing agents. The preparation method includes the following steps: adding an aliphatic polyamine to a reaction vessel, heating to 70-80°C, and then adding a mixture of epoxy resin and polyethylene glycol diglycidyl ether dropwise for an addition reaction; maintaining the temperature after the addition is complete, and then performing vacuum distillation; adding maleic anhydride oil to the product after vacuum distillation, and heating to 90-95°C for a reaction; cooling after the reaction, and then adding deionized water dropwise for emulsification to obtain the waterborne epoxy curing agent. This invention utilizes green, solvent-free production, and the resulting curing agent exhibits fast drying speed, excellent flash rust resistance, water resistance, and salt spray resistance.

The application discloses a device and method for discharging additive and subtractive materials by planetary electrodes, and relates to the technical field of electric spark deposition, which comprises a shell, a bottom end of a stirring head in a semispherical shape, a feeding cavity arranged in the stirring head, a feeding port arranged at a bottom of a side wall of the stirring head, a feeding pipe arranged at a top end of the stirring head, a first driving mechanism for driving the stirring head to rotate, the stirring head penetrating through a planetary carrier, a gap being arranged between the planetary carrier and the stirring head, an axis of the stirring head being parallel to or coinciding with an axis of the planetary carrier, the planetary carrier being arranged in the shell and being rotationally matched with the shell through a bearing, a gas feeding cavity being arranged in the planetary carrier, an air filling pipe being arranged at a top end of the planetary carrier, a second driving mechanism for driving the planetary carrier to rotate, a plurality of rotary motors being fixedly connected with the planetary carrier, a gas feeding channel and a gas outlet being arranged in each rotary electrode, and an electrode ring being fixedly arranged on an inner wall of the shell. The application can improve the compactness of a coating.

The invention relates to a chip solid capacitor and a coating process thereof, the chip solid tantalum capacitor is composed of a tantalum block, a dielectric oxide layer, a cathode layer, a transition layer, a silver layer and a plastic package layer, the cathode layer is a manganese dioxide layer, and the manganese dioxide layer is formed by thermal decomposition on the tantalum block on which the dielectric oxide layer grows through the coating process; the specific operation of the coating process is specifically limited, and the tantalum block is sequentially impregnated with thin-thick-thick-thin coating liquid, so that the prepared cathode layer is high in density, high in interlayer binding force and free of bubbling and delamination defects, the qualification rate and the moisture resistance of the product are greatly improved, meanwhile, parameters of all stages are controllable and adjustable, and the production cost is reduced. And the production requirements of high-specific-volume tantalum capacitors with different specific volume grades can be met, and the method has a good industrial application prospect.

This application relates to a passivation treatment solution, aluminum alloy components, and a method for preparing the same. The passivation treatment solution comprises a solvent and components dispersed in the solvent at the following concentrations: fluorozirconate 5 g / L–30 g / L, fluorinated silane coupling agent 10 ml / L–50 ml / L, polyphenol complexing agent 1 g / L–8 g / L, and silicate 5 g / L–25 g / L. The passivation treatment solution, through a multi-component synergistic formulation composed of fluorozirconate, fluorinated silane coupling agent, polyphenol complexing agent, and silicate, exhibits different functions and molecular bridging synergistic effects. After passivation treatment of anodized aluminum alloys, the alkaline corrosion resistance of the aluminum alloys can be significantly enhanced.

The application belongs to the technical field of modified functional fibers, and particularly relates to a manufacturing method of high-bulkiness special-shaped hollow fibers. The low-crystalline polyester chip is obtained by modifying the polyester, and the functional components such as graphite and tourmaline are introduced, and the high-bulkiness special-shaped hollow fibers are prepared by using a special-shaped spinneret to melt and spin, so that the hollow degree and bulkiness of the fibers are effectively improved, good breaking strength is obtained, and the oxygen index is effectively increased.

The invention provides a micro-channel heat exchange device based on high-entropy alloy connection and a preparation method and application of the micro-channel heat exchange device. According to the micro-channel heat exchange device, the connection quality of the joints of all layers of the micro-channel heat exchange device is improved, the tensile strength, the corrosion resistance and the hydrogen embrittlement resistance are improved, and the compactness, the corrosion resistance and the hydrogen embrittlement resistance of the fluid contact surface in the micro-channel heat exchange device are improved; the strength, the corrosion resistance and the hydrogen embrittlement resistance of the micro-channel heat exchange device are integrally improved, so that the micro-channel heat exchange device based on high-entropy alloy connection is suitable for places with high requirements for the space utilization rate and the reliability such as a hydrogen refueling station, and is particularly applied as a micro-channel heat exchanger of a hydrogen cooling system of the hydrogen refueling station.

This invention belongs to the field of passivating agent technology, specifically relating to a corrosion-resistant, high-temperature-resistant, chromium-free passivating agent for magnesium alloy workpieces and its preparation method. The chromium-free passivating agent comprises the following components by weight: 4-5 parts film-forming agent; 8-10 parts functional acrylic resin; 0.8-1 parts vanadate; 3-5 parts coupling agent; 1-2 parts corrosion inhibitor; and 70-80 parts water. The chromium-free passivating agent provided by this invention uses zirconium fluoride and titanium fluoride as film-forming agents, and is modified by adding functional acrylic resin, which improves the density and corrosion resistance of the passivation film. This results in a chromium-free passivating agent with good corrosion resistance, adhesion, high-temperature resistance, and antibacterial properties. When used in magnesium alloy workpieces, it exhibits good corrosion resistance and helps extend the service life of the magnesium alloy workpieces.

This invention provides a high-hardness, scratch-resistant, water-based two-component polyurethane matte black base coat, its preparation method, and its application. The two-component matte black base coat comprises component A and component B. Component A includes a water-based hydroxyl polyurethane acrylic dispersion, a water-based hydroxyl acrylic dispersion, hydroxyl microspheres, a high-pigment carbon black paste, water-based additives, a film-forming aid, and water. Component B includes a curing agent and a diluent. The matte black base coat of this invention exhibits high hardness, scratch resistance, and chemical resistance. It also demonstrates excellent workability, activation period, and surface finish, making it suitable for water-based two-component matte black base coat systems. It is particularly suitable for decorative and protective applications in the plastic paint industry, such as 3C consumer electronics, where extremely stringent requirements for abrasion resistance, scratch resistance, and chemical resistance are necessary.

This invention relates to a salt spray resistant nano-microceramic heavy-duty anti-corrosion coating material for use in port and marine environments, its preparation process, and its application. This salt spray resistant nano-microceramic heavy-duty anti-corrosion coating material for port and marine environments is composed of component A and component B mixed in a mass ratio of 4:1 to 5:1. By weight, component A comprises 30-45 parts film-forming resin, 15-25 parts nano-ceramic powder, 10-18 parts corrosion-resistant filler, 8-12 parts rust-preventive pigment, 0.3-0.8 parts dispersant, 0.2-0.5 parts defoamer, 0.2-0.6 parts leveling agent, 0.5-1.2 parts anti-settling agent, and 5-10 parts diluent; component B is a silane-modified phenolic amine curing agent. This nano-microceramic heavy-duty anti-corrosion coating material for port and marine environments solves the technical problems of existing marine anti-corrosion coatings, such as high chloride ion permeability, difficulty in low-temperature curing, large variations in adhesion with temperature differences, and insufficient weather resistance.

This application relates to the field of full transfer film technology, specifically disclosing an electroplated metal laser full transfer film with surface texture. The electroplated metal laser full transfer film with surface texture includes a substrate, a release layer, a laser molding layer, an aluminum plating layer, and an adhesive layer. The laser molding layer coating is prepared from acrylic resin, alkyd resin, isocyanate curing agent, hexamethylolmelamine, hydroxyl acrylate, modified filler, leveling agent, defoamer, pigment, and solvent. The modified filler is prepared from nano-alumina, polyethyleneimine, and fumaric acid, with a mass ratio of nano-alumina, polyethyleneimine, and fumaric acid of 1:(0.4-0.6):(0.7-1). This invention effectively improves the surface adhesion of the laser molding layer, reduces the separation of the laser molding layer during hot stamping, and improves the quality of the full transfer film.

The application belongs to the field of ceramic powder preparation, and discloses a method for in-situ preparation of high-performance TiB2-B4C composite ceramic from sapphire fine grinding waste. The method uses the waste produced in the sapphire grinding process as raw material (B4C, Al2O3 and Fe), adds TiO2 and C after alkali washing and purification, and combines with the discharge plasma sintering to in-situ prepare TiB2-B4C composite ceramic. The method not only realizes the comprehensive recovery of B4C in the sapphire fine grinding waste slurry, reduces environmental pollution, but also provides a method for in-situ preparation of TiB2-B4C composite ceramic from waste, changes waste into treasure, and realizes the secondary use of resources. In addition, the raw material cost is low, and the method has obvious economic value and environmental protection significance. The method has the advantages of short process, small pollution, simplicity and the like, and can be used for industrial production.

The invention belongs to the technical field of marine concrete, and particularly relates to sulfate-resistant corrosion-resistant concrete as well as a preparation method and application thereof. The sulfate-resistant corrosion-resistant concrete is prepared from the following raw materials in parts by mass: 200 to 400 parts of cement, 30 to 60 parts of fly ash, 30 to 60 parts of slag powder, 800 to 1200 parts of gravel, 30 to 60 parts of an expanding agent, 500 to 900 parts of sand, 5 to 15 parts of a water reducing agent, 10 to 30 parts of an erosion inhibitor and 100 to 200 parts of water. The erosion inhibitor comprises nano silicon dioxide, silane modified mica powder and modified expanded perlite; the modified expanded perlite is formed by loading a chelating agent on expanded perlite and then coating the expanded perlite with a water-absorbing swelling material. The sulfate-resistant corrosion-resistant concrete provided by the invention has excellent sulfate corrosion resistance in a low-humidity environment and under a semi-soaking condition.

The invention discloses a multifunctional super-hydrophobic heat-conducting anticorrosive coating and a preparation method, and belongs to the field of coatings, surface layer resin in the coating is blended fluororesin, and filler is fluorosilane modified silicon dioxide-fluorinated graphene composite filler prepared by a chemical grafting method; the bottom layer resin is polyether-ether-ketone (PEEK), the filler is graphene or fluorinated graphene, the bottom layer coating and the surface layer coating are both prepared through electrophoretic coating, the thickness of the bottom layer is 5-15 microns, the thickness of the surface layer is 10-30 microns, and the total thickness is 15-45 microns. The modified filler integrates the high thermal conductivity and high shielding property of fluorinated graphene, the high wear resistance of silicon dioxide and the high hydrophobicity of fluorosilane, a labyrinth anti-corrosion structure of the coating is constructed, and the thermal conductivity coefficient and wear resistance of the coating are improved through a formed three-dimensional thermal conduction network. The modified filler constructs a micro-nano structure on the surface of the fluororesin, so that the surface of the composite coating reaches a super-hydrophobic state, and corrosion prevention and enhanced condensation heat transfer are facilitated. And by combining the advantages of easiness in control and uniformity of electrophoretic coating, the coating is relatively thin and also has the characteristics of heat conduction, corrosion resistance, wear resistance, superhydrophobicity and the like. The invention provides a feasible solution for a protective coating of a corrosive flue gas waste heat recovery environment.

The utility model relates to the technical field of silver-copper alloy strip billet production, in particular to a combined die for large-specification silver-copper alloy strip billet production, which comprises a divergent die and a forming die which are arranged in an extruder cavity, the divergent die is arranged at the outlet end of an extrusion cavity of an extruder, and the forming die is positioned on one side, far away from the outlet end of the extrusion cavity of the extruder, of the divergent die. An expansion cavity is formed in the divergent die, and a sizing belt is arranged on the forming die. The internal structure of a strip blank produced by an existing mold is not compact enough, and product strength and stability are affected. According to the utility model, the trapezoidal shunting block of the shunting die is matched with the shunting groove and the sizing belt of the forming die, so that alloy raw materials flow in the die more smoothly and are uniformly distributed. In the uniform flowing and distribution process, the alloy raw materials can be more tightly combined together, so that the compactness of the internal structure of the strip blank is improved, the strength and stability of the product are enhanced, the product quality can meet the standard requirement more easily, the production cost is reduced, smooth production is guaranteed, and the production efficiency is improved.

The application relates to the technical field of corrosion-resistant alloy coating, in particular to a low-heat semi-solid surfacing process and application thereof, which comprises the following steps: using a plasma transferred arc surfacing gun with a double-gas channel, one channel is used for spraying low-heat semi-solid surfacing coating material, and the low-heat semi-solid surfacing coating material is heated to 6800-7800 DEG C through an ion source and is sprayed to the surface of a base material in a state of being protected by inert gas, and is scattered on the surface of the base material at an incident angle of 60-75 DEG; meanwhile, the other gas channel of the plasma transferred arc surfacing gun sprays alloy pellets to perform surfacing shot blasting, and a high-dense, continuous and uniform surfacing layer is formed on the surface of the base material; the low-heat semi-solid surfacing process has the advantages that the high-temperature corrosion resistance of the surface coating of important equipment such as thermal power, nuclear power, ocean, national defense and military industry can be improved.

This invention discloses a porous ceramic for semiconductors and its preparation method, which is mainly composed of the following raw materials by weight percentage: 50-80% high-temperature calcined oxide, 1-10% boron oxide, 5-20% silicon dioxide, 5-15% calcium carbonate, 3-5% lithium carbonate, 0.5-1.5% yttrium oxide, 2-15% sodium carbonate, and 0.3-0.8% zirconium tungstate. The preparation steps of the porous ceramic include: 1) thoroughly mixing all raw materials; 2) forming the mixed powder particles into a green body in a mold; and 3) sintering the green body in an oxygen-rich atmosphere with an oxygen volume ratio ≥30%. This porous ceramic material has good air permeability, low density, high strength, and a low coefficient of thermal expansion, making it an excellent choice for preparing vacuum adsorption components for cutting ceramic substrates and wafer thinning equipment.