301results about How to "Improve densification performance" patented technology

The invention relates to the technical field of nano ceramic materials, and discloses a high-strength nano aluminum oxide ceramic product and a preparation process thereof.The preparation process comprises the following preparation steps that aluminum oxide powder, a composite binder, composite gel, a plasticizer and a solvent are mixed and subjected to ball milling, and composite slurry is obtained; placing the composite slurry in a mold, and performing mold pressing and drying to obtain a green body; and putting the green body into a high-temperature sintering furnace, carrying out high-temperature sintering, and cooling to room temperature to obtain the nano aluminum oxide ceramic product. Nano zirconium oxide and nano magnesium oxide are formed on the surfaces of the pretreated silicon carbide whiskers, and can form a solid solution with nano aluminum oxide in the sintering process to serve as a bridge of the silicon carbide whiskers and nano aluminum oxide particles, so that the binding force of the silicon carbide whiskers in a nano aluminum oxide ceramic matrix is remarkably enhanced; phosphoric acid and aluminum ammonium sulfate are firmly combined on the surfaces of nanometer aluminum oxide particles through carboxymethyl cellulose, and the situation that phosphoric acid and aluminum ammonium sulfate are not firmly combined with the nanometer aluminum oxide particles is avoided.

The invention discloses a wear-resistant and high-temperature-resistant synchronous belt and a preparation method thereof. The wear-resistant and high-temperature-resistant synchronous belt comprises a synchronous belt framework and a synchronous belt rubber sheet, the synchronous belt rubber sheet is prepared from the following raw materials: a fluorosilicone thermoplastic polyurethane elastomer containing a benzene ring structure, an amino-containing hyperbranched liquid crystal polymer, methyl vinyl phenyl silicone rubber, epoxidized natural rubber, molybdenum sulfide nanosheets, reinforced fibers, bis (1-vinyl imidazole-2-) ketone, 2-acrylamido-2-methylpropanesulfonic acid, 4, 4 '-difluoro-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1 The high-temperature-resistant rubber is prepared from 2, 6-hydroxy-2-cyanobenzothiazole, bis (3-aminophenyl) 3, 5-bis (trifluoromethyl) phenylphosphine oxide, a catalyst, a coupling agent, a vulcanizing agent, an anti-aging agent, a scorch retarder and a lubricating agent. The synchronous belt is good in mechanical property, sufficient in high-temperature resistance and cold resistance, good in wear resistance and excellent in aging resistance and flame retardance.

The invention relates to a flame-retardant inorganic quick-setting material and a preparation method thereof, and the flame-retardant inorganic quick-setting material is prepared from the following raw materials: sulphoaluminate cement, aluminum-magnesium hydrotalcite, phosphorus slag powder, waste PBO fiber, an accelerator, a water reducer, a functional auxiliary agent, and 3, 3 '-diamino-4, 4'-difluorodiphenyl sulfone. The functional auxiliary agent comprises structural units introduced by the following monomers: 3-[N, N-dimethyl-[2-(2-methylpropyl-2-enoyloxy) ethyl] ammonium] propane-1-sulfonic acid inner salt, diphenyl (4-vinyl phenyl) phosphine oxide, 1, 3-bis (oxirane methyl)-5-(2-allyl)-1, 3, 5-triazine-2, 4, 6 (1H, 3H, 5H)-triketone, 10-(4-vinyl phenyl)-10H-phenoxazine and itaconic acid. The material is high in strength, remarkable in rapid hardening and flame-retardant effect, and safe and environment-friendly to use.

The invention discloses low-alkali solid waste cementing material-based plant-growing concrete and a preparation method thereof. The vegetation concrete comprises a base layer framework and a surface layer material laid on the framework. Wherein the base layer framework is prepared from the following raw material components in parts by weight: 160 to 200 parts of low-alkali solid waste cement, 15 to 25 parts of phosphogypsum, 1380 to 2100 parts of mineralized concrete recycled aggregate, 62 to 102 parts of mineral admixture and 60 to 90 parts of mixing water. The surface layer material comprises the following raw material components: 1-5% of sodium alginate, 1-10% of calcium superphosphate, 1-10% of urea and the balance of soil. The mineralized concrete recycled aggregate is prepared by the following steps: soaking the concrete recycled aggregate in a diammonium hydrogen phosphate solution, and separating out the aggregate after soaking is completed, thereby obtaining the mineralized concrete recycled aggregate. According to the plant-growing concrete, alkalinity in concrete pores can be remarkably reduced, and the plant-growing concrete has stable later strength and good plant germination rate.

The invention relates to a composite multi-effect scale and corrosion inhibitor and a preparation method thereof, and belongs to the technical field of water treatment agents.The composite multi-effect scale and corrosion inhibitor is prepared from carboxylic acid monomers, sulfonate monomers, organophosphorus compounds, modified chitosan, modified nanometer titania, oxidation type initiators, reduction type initiators, azole derivatives and the like, the modified chitosan is formed by coating the surface of chitosan with cerium chloride; the modified nano titanium dioxide is formed by coating the surface of nano titanium dioxide with sodium polyaspartate. The composite multi-effect scale and corrosion inhibitor is prepared in a mode of compounding while synthesizing, the scale inhibition effect is excellent, the comprehensive descaling capacity can reach 97% or above, and the composite multi-effect scale and corrosion inhibitor can be used for a high-pH, high-alkalinity, high-temperature and high-hardness circulating cooling water system under the high-concentration-multiple operation condition; the method is suitable for circulating cooling water treatment requirements under harsh conditions in industries such as chemical industry, smelting and light industry.

The invention relates to the technical field of metal surface treatment, and discloses sheet metal part spraying and plastic spraying equipment and a technological method.The sheet metal part spraying and plastic spraying equipment comprises a spraying chamber and a conveying mechanism, the spraying chamber is arranged in the middle of the conveying mechanism, and a material distributing plate is installed at the top of the spraying chamber; two spraying mechanisms are arranged on the side, close to the material distributing plate, of the interior of the spraying chamber, a plurality of evenly-distributed spraying guns are arranged in the two spraying mechanisms, an air pressure tank and a conveying pipe are installed on the side, close to the material distributing plate, of each spraying gun, and a pump body is installed on the side, away from the spraying guns, of each conveying pipe; and a paint storage tank is arranged on the rear side of the spraying chamber. The position and the angle of the spraying gun are accurately controlled, and the automatic adjusting device is utilized, so that the spraying gun can be dynamically adjusted according to the surface shape and the size of the sheet metal part, and all corners of a workpiece are uniformly and comprehensively covered with paint.

The invention discloses a rare earth oxide modified high-entropy hard alloy and a preparation method thereof. A high-entropy hard phase (high-temperature calcination), a high-entropy binding phase and rare earth oxide are adopted, grinding, pressing and air pressure sintering at the temperature of 1450-1550 DEG C are conducted, and the high-entropy hard phase is prepared from tungsten carbide, titanium carbide, zirconium carbide, yttrium carbide, manganese carbide, chromium carbide and molybdenum carbide; the high-entropy binding phase comprises the following components: cobalt and a CoCrFeNi-series high-entropy alloy; and the component of the rare earth oxide is Y2O3 or Nd2O3. The prepared rare earth oxide modified high-entropy hard alloy has the advantages of high strength, high compactness, high hardness, high wear resistance and the like.

The invention relates to an environment-friendly low-carbon magnesia carbon brick and a preparation method thereof, and the environment-friendly low-carbon magnesia carbon brick comprises the following components in parts by weight: 70-85 parts of fused magnesia aggregate, 25-35 parts of magnesia powder, 3-5 parts of a composite antioxidant, 0.5-1 part of nano carbon black and 2-4 parts of nano carbon fiber. The nano carbon fiber is adopted as a binding agent, so that the strength and toughness of the magnesia carbon brick can be improved, the erosion resistance and thermal shock resistance of the magnesia carbon brick can be enhanced, and the magnesia carbon brick does not generate harmful gas to pollute the environment during heating and is environment-friendly. The nano carbon black can construct a continuous carbon network structure with relatively low carbon content and can be tightly combined with other raw materials in a magnesia carbon brick matrix to prevent the matrix from being wetted by slag, so that the erosion resistance of the magnesia carbon brick is improved, the carbon-containing resin powder can be softened in a high-temperature state, pores in the matrix are closed in the softening process, and the corrosion resistance of the magnesia carbon brick is improved. The compactness of the magnesia carbon brick is improved, and the strength, the high-temperature breaking strength and the erosion resistance of the magnesia carbon brick are further improved.

The invention provides a myriameter deep oil-gas wall-fixing type water-based drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The myriameter deep oil gas wall-fixing type water-based drilling fluid is prepared from the following raw materials in parts by weight: 100 parts of water, 1-5 parts of a modified clay shear strength improving agent, 2-4 parts of a hydrophobic association polymer flow pattern regulator, 3-8 parts of a blocking agent, 2-5 parts of a hyperbranched polymer filtrate reducer and 1-3 parts of a cementation blocking type wall-fixing agent. The invention also provides a preparation method of the drilling fluid. The components such as the flow pattern regulator, the plugging agent, the filtrate reducer and the wall-fixing agent are mutually matched and synergistic, so that the drilling fluid can keep good rheological, filtration, plugging and inhibition performances for a long time under the conditions of 240 DEG C and saturated salt, has a strong wall-fixing effect, can effectively maintain the stability of the well wall of an oil-gas well in the depth of 10,000 meters, and has a wide application prospect. And well collapse, well leakage, blowout and other complex well drilling are prevented, and the drilling tool can be used for drilling oil and gas wells with the depth of ten thousand meters.

The invention relates to the technical field of composite plastic wood, and discloses an environment-friendly composite plastic wood plate and a preparation method thereof.The environment-friendly composite plastic wood plate is prepared from bamboo powder, poly (butylene adipate-co-terephthalate), polylactic acid, a compatilizer, filler, a lubricant, functional fibers and a composite additive, the functional fibers are added, so that the prepared environment-friendly plastic-wood plate has excellent mechanical properties and antibacterial properties, and the situation that the composite plastic-wood plate is eroded by bacteria and molds, and the appearance and the performance of the composite plastic-wood plate are affected badly can be avoided; by adding the composite additive, the prepared environment-friendly plastic-wood plate has excellent impact resistance and ultraviolet resistance, energy can be better absorbed and dispersed when the environment-friendly plastic-wood plate is impacted by external force, and the situation that the service life of the composite plastic-wood plate is shortened due to ultraviolet irradiation in the long-term use process is avoided.

The invention discloses composite powder with a core-shell structure and a preparation method of the composite powder. The preparation method comprises the steps of pretreatment, titanium dioxide coating treatment, plating solution treatment and silver coating treatment. The titanium dioxide coating treatment comprises the following steps: after ultrasonically stirring butyl titanate and absolute ethyl alcohol, adding dilute acid to prepare a reaction solution; nickel powder is added into the reaction liquid for a constant-temperature reaction, and titanium dioxide coated nickel powder is obtained after the reaction; the plating solution treatment comprises the steps that titanium dioxide coated nickel powder, a solvent and a dispersing agent are subjected to ultrasonic stirring and then subjected to constant-temperature stirring, a reducing agent and a sodium hydroxide solution are added, and a dispersed solution is obtained after reaction; the silver coating treatment comprises the following steps: ultrasonically stirring and dispersing silver nitrate and deionized water, and then adding a complexing agent for complexing reaction; and pouring into the dispersion solution under a stirring state, and reacting to obtain the composite powder. According to the method, the stability of the nickel powder and the compactness of the coating layer in the preparation process of the composite powder can be effectively improved, and then the conductivity of the composite powder can be improved.

The invention discloses an application of a thiazole thioketone compound in chemical copper plating and a chemical copper plating solution, and belongs to the technical field of chemical plating. The thiazole thioketone compound with the structure shown in the formula I and the nitrogen-containing heterocyclic compound are combined to be used for chemical copper plating, the deposition speed of the chemical copper plating solution can be increased, the chemical copper plating solution has excellent stability, meanwhile, the electroplating hole filling effect after chemical copper plating can be improved, and correspondingly, the prepared chemical copper plating solution has good bath solution stability, and the chemical copper plating solution can be applied to chemical copper plating. When the copper plating solution is applied to a chemical copper plating method, the deposition rate of chemical copper plating and the compactness of a plating layer can be effectively improved. # imgabs0 #

The invention relates to the technical field of aluminum electrolysis carbon anodes, in particular to a prebaked carbon anode with high conductivity and oxidation resistance and a preparation method of the prebaked carbon anode. The raw materials of the prebaked carbon anode comprise dry materials with multiple particle sizes and a binder, and the total weight m1 of the dry materials with multiple particle sizes and the weight m2 of the binder meet the relational expression: m1: m2 = (82: 18)-(88: 12); wherein the raw materials of the dry material comprise calcined petroleum coke with multiple granularities and conductive carbon materials with multiple granularities, and the calcined petroleum coke and the conductive carbon materials meet the following relational expressions: m3: m4 = (80-95): (5-20), and m31: m42 = m3: m4. According to the prebaked carbon anode, the conductivity and the oxidation resistance can be synchronously improved.

The invention discloses a method for in-situ growth of a large-thickness high temperature resistance / heat insulation / radiation heat dissipation integrated thermal protection coating with a multistage gradient hole structure on the surface of thin-wall metal, and relates to the technical field of thermal protection coatings. The invention aims to solve the problems of how to finely regulate and control the pore size, pore content and pore distribution in the coating and how to improve the heat insulation performance and radiation heat dissipation performance of the coating. According to the method, electric parameters are regulated and controlled on the thin-wall metal surface in an electrolyte system in a multi-step grading mode, and in-situ preparation of the large-thickness high-temperature-resistant / heat-insulation / radiation heat dissipation integrated thermal protection coating with the multi-stage gradient hole structure is achieved. According to the invention, the multi-stage gradient pore structure coating is innovatively constructed by adopting multi-step hierarchical electrical parameters, so that the internal pore characteristics of the coating can be effectively controlled, the integrated improvement of heat insulation, radiation heat dissipation and high temperature resistance can be realized, and a new way is opened up for the in-situ preparation of a large-thickness and high-performance thermal protection coating.

The invention particularly relates to plate extrusion equipment and a using method thereof.The plate extrusion equipment comprises a plate discharging composite machine head, a plurality of feeding ends arranged on one side of the plate discharging composite machine head and a plurality of thermoplastic extruders correspondingly connected with the feeding ends of the plate discharging composite machine head, and the plate discharging composite machine head and the four thermoplastic extruders matched with the plate discharging composite machine head work cooperatively; according to the utility model, materials from different thermoplastic extruders can be layered, pressurized and conveyed through the four conical pressurizing ports, so that multiple layers of materials can be synchronously and accurately compounded in the plate outlet groove, the tight combination between layers is ensured, and the structural stability of the composite plate is improved; wherein the design of horizontal communication between the horizontal plate cavity and the plate outlet groove ensures the stable transition of the composite material in the extrusion molding process, avoids the common problem of unstable extrusion or fault in the traditional equipment, and is combined with the use of the cooler, so that the composite plate can be quickly cooled and molded after being extruded, the production efficiency is improved, and the production cost is reduced. And the size accuracy and the surface quality of the plate are ensured.

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 belongs to the technical field of packaging materials, and particularly relates to an environment-friendly packaging material and a preparation method thereof. The packaging material comprises an inner layer and a surface layer which are sequentially arranged, the inner layer is prepared from the following raw materials in parts by weight: 65 to 85 parts of low-density polyethylene, 20 to 30 parts of metallocene linear low-density polyethylene, 5 to 10 parts of ethylene-vinyl alcohol copolymer and 1 to 2 parts of nano zinc oxide; the surface layer is prepared from the following raw materials in parts by weight: 20 to 25 parts of low-density polyethylene, 60 to 70 parts of medium-density polyethylene, 8 to 12 parts of modified montmorillonite and 1 to 5 parts of sedum sarmentosum extract. The environment-friendly packaging material has better barrier property and antibacterial property, and also has excellent mechanical property.

The invention belongs to the technical field of magnetic materials, and particularly relates to a method for preparing a high-performance neodymium-iron-boron magnet in a one-stop mode. The method for preparing the high-performance neodymium-iron-boron magnet in the one-stop mode comprises the following steps that rapid-quenching neodymium-iron-boron magnetic powder is subjected to cold pressing to obtain a cold-pressed blank, the surface of the cold-pressed blank is coated with a release agent, then preheating is conducted, and then the cold-pressed blank is put into a heat flow deformation mold to be subjected to pre-pressing, heat flow deformation and forming; the heat flow change mold sequentially comprises a pre-pressing section, a heat flow change section and a forming section from top to bottom. According to the method, pre-pressing, heat flow change and forming are carried out in a one-stop mode in a heat flow change mold, densification-grain flow change, magnetic domain preferred orientation-orientation uniformization and finished product forming of the magnet are completed, the traditional hot pressing process is avoided, the production procedure is greatly simplified, the production cost is reduced, and the production efficiency is improved.

The invention relates to the technical field of building materials, in particular to a light anti-corrosion cement-based prefabricated part as well as a preparation method and application thereof. The cement-based prefabricated part is prefabricated and formed by bonding a base body located on the inner layer of the cement-based prefabricated part and a surface material located on the peripheral layer of the cement-based prefabricated part through an adhesive and performing microwave heating. Wherein the surface material is prepared from filler, modified stone powder, cement and the like through colloid mill shearing treatment and filter pressing treatment; the matrix is prepared by mixing a foaming agent, mineral powder, sodium hydroxide, metakaolin, aggregate, polypropylene fiber, calcium lignosulphonate and the like, putting into a mold, performing steam curing and demolding. The outer surface of the base body is coated with an adhesive, and the surface material and the base body are combined in a vibration extrusion forming mode and then subjected to microwave heating treatment to be manufactured into the cement-based prefabricated part. The cement-based prefabricated part is high in salt resistance, freezing resistance and acid resistance, light in weight and suitable for being used as a building material in a cold region, including curbs.

The invention provides a method for preparing austenite aging steel based on injection molding, and belongs to the technical field of steel materials. The modified raw materials such as the sulfur-carbon-molybdenum composite powder, the nitrogen-nickel composite powder and the boron-phosphorus-chromium composite powder are matched with the components such as the silicon powder, the manganese powder and the iron powder, the austenite aging steel is obtained through injection molding, the density of the austenite aging steel material is improved, and meanwhile the mechanical property and hardness of the austenite aging steel material are improved.

The inorganic quick-setting filling material comprises a material A and a material B. The material A is prepared from the following components in parts by weight: 25-35 parts of sulphoaluminate cement, 30-40 parts of blast furnace slag, 10-20 parts of waste gypsum, 1-3 parts of recycled alumina fiber, 5-10 parts of volcanic ash and 0.8-1.2 parts of (3, 6-diamino acridine-9-yl) boric acid. The material B is prepared from the following raw materials in parts by weight: 4 to 6 parts of functional water-soluble resin, 1 to 2 parts of sodium 3-(N-morpholinyl)-2-hydroxypropanesulfonate, 0.5 to 0.8 part of sucralose, 0.1 to 1 part of sodium lignin sulfonate, 0.8 to 1.2 parts of 1, 3, 5-triglycidyl-S-triazinetrione and 0.1 to 0.5 part of sodium N-(trimethoxysilylpropyl) ethylenediamine triacetate. The material is good in rapid hardening effect, high in compressive strength, good in flame-retardant and antistatic performance and long in service life.

The invention discloses a variable-diameter yarn bundle constraint control mechanism of a composite rod production line, relates to the technical field of composite rod production, and can solve the problem of small tension after a glass fiber bundle is laid and wound in the prior art. The variable-diameter yarn bundle restraint control mechanism of the composite rod production line comprises a carrying disc assembly which comprises a movable carrying disc and a static carrying disc which are arranged in parallel and rotationally connected, and a plurality of restraint unit assemblies used for restraining and controlling the distance between an axial yarn bundle and the outer wall of an electric pole mold. Wherein a movable disc inner ring is arranged in the movable loading disc, and a static disc inner ring is arranged in the static loading disc; the multiple restraining unit assemblies are rotationally and symmetrically distributed in the circumferential direction of the carrying disc assembly, one end of each restraining unit assembly is slidably connected to the movable carrying disc in the radial direction of the carrying disc assembly, and the other end of each restraining unit assembly is fixedly connected to the movable carrying disc through a movable disc inner ring and a static disc inner ring. And the driving assembly is used for driving the dynamic loading disc to rotate on the static loading disc.

The invention discloses a graphene-modified flame-retardant polypropylene material and a preparation method thereof. Graphene is dispersed through maleic anhydride grafted polypropylene to form a master batch, and flame retardants such as piperazine phosphate and sulfonyl bis(ethane-2,1-diyl)bis(diphenylphosphine oxide) are added; the graphene-modified flame-retardant polypropylene material is prepared by master batch-melting-smelting, the dispersibility of graphene in polypropylene is enhanced, the graphene is evenly dispersed in the mixed system, and the dispersion and combination of the flame retardant in the polypropylene matrix are further enhanced; the good barrier properties of graphene and the intumescent flame retardant produce a good synergistic effect, so that the compactness of the carbon layer formed by combustion is enhanced, and the flame retardant performance of the material is significantly improved.

The present invention relates to the technical field of plastic forming of complex parts, in particular to a multi-directional die forging die and forming process of a railway locomotive hook tongue forging, comprising an upper die assembly, a lower die assembly and two horizontal punches, wherein the upper die assembly comprises an upper die, an upper punch and a side punch; the lower die assembly comprises a lower die, and the upper die, the upper punch, the side punch, the lower die and the two horizontal punches are combined to form a cavity in the shape of a hook tongue. The present invention has a small machining allowance, and the upper punch directly extrude the blank into the traction curved surface of the hook tongue, thereby improving the tissue density of this part, improving its wear resistance and impact resistance, and extending the service life of the hook tongue.

The invention discloses a plastic inner container full-carbon-fiber winding gas cylinder with high fire resistance and a preparation method of the plastic inner container full-carbon-fiber winding gas cylinder, and belongs to the technical field of hydrogen storage cylinder preparation. The preparation method comprises the following steps that (1) PA6 serves as a base material, a plastic inner container is obtained through an injection molding technology, and a bottle opening is reserved in the top of the plastic inner container; (2) water-borne epoxy resin, a flame-retardant additive, ethanol and a curing agent are mixed to obtain slurry, and the flame-retardant additive is prepared through a reaction of a diamine monomer and bis (2, 3-dibromopropyl) phosphate; and (3) carbon fibers are soaked in the slurry to obtain soaked fibers, the soaked fibers are wound to the outer side of the plastic inner container and are heated and cured to form a fiber winding layer, and a bottle mouth connector is installed at a bottle mouth. The flame-retardant additive added into the slurry can endow the gas cylinder with good fireproof and flame-retardant effects, and can form a compact cross-linked network with the epoxy resin, so that the overall fireproof uniformity, sealing property and deformation resistance of the gas cylinder are improved, and the service life is prolonged.

The invention discloses an LCD photocuring 3D printer and a method for improving the resolution of the LCD photocuring 3D printer, the angle of light passing through a pixel opening area of an LCD screen is changed by adjusting the angle of a reflector group, the position of a curing light beam in a printing area (photocuring glue) is further influenced, so that the offset of a pixel image is realized, and when the offset is carried out for n times, the position of the curing light beam in the printing area (photocuring glue) is changed. Compared with the prior art, n times of pixel points are added on the basis of an original image, namely, the resolution ratio of the LCD is expanded in a multiplied mode, the effect of improving the resolution ratio of the LCD photocuring 3D printer in a multiplied mode is achieved, meanwhile, the sufficiency and compactness of an exposure area are improved, and the printing yield is improved.

The invention discloses a hydrogen-corrosion-resistant coating material for a hydrogen-rich electrolyte environment and a preparation method thereof, and relates to the technical field of hydrogen-corrosion-resistant coating materials, the coating material comprises the following components by weight: a metal matrix reinforcing material: 30%-50% of nickel and 5%-10% of cobalt; the ceramic particles comprise 10%-20% of aluminum oxide and 5%-15% of The coating material disclosed by the invention shows excellent corrosion resistance, wear resistance and hydrogen embrittlement resistance in a hydrogen-rich electrolyte environment. The nickel-cobalt alloy layer is kept stable at high temperature and high pressure, hydrogen permeation is blocked, and material degradation is prevented. Aluminum oxide and silicon carbide improve the hardness and wear resistance of the coating, and the coating is kept intact in temperature circulation. The rare earth elements yttrium oxide and cerium oxide enhance the oxidation resistance and hydrogen embrittlement resistance. And the dispersing agent and the cross-linking agent further improve the uniformity, compactness and adhesion of the coating, so that the coating is suitable for industrial parts in high-pressure and high-stress environments.

The invention discloses a method for removing metal impurities through electrolytic coupling vacuum distillation of tin benzene sulfonate. The method comprises the following steps: step 1, preparing a liquid; step 2, preparing an electrolyte; step 3, electrolysis; 4, copper removal and refining; and step 5, vacuum distillation. According to the method, the crude tin is prepared into the electrolyte, the benzene sulfonate is added for electrolysis, the precipitation potential of lead and tin is changed, the impurity lead element with high difficulty is removed, other impurity elements in the crude tin can also be removed, the lead, copper and other impurity elements are further removed by combining copper removal refining and vacuum distillation, and the 5N or 6N standard high-purity tin is obtained. The content of the lead element and the content of the bismuth element are both smaller than 1 ppm, the content of the uranium element and the content of the thorium element are both smaller than 1 ppb, the requirement of a low-alpha-ray-dose material is met, the problem that radioactive alpha-particle impurity elements in crude tin are difficult to remove through an electrolytic method is effectively solved, the use requirement that the high-purity tin serves as a welding flux is met, and the quality of a semiconductor chip is greatly improved.

The invention provides a magnesium alloy surface high-wear-resistance micro-arc oxidation film layer and a preparation method thereof. The preparation method comprises the following steps: S1, pretreatment of a magnesium alloy matrix: grinding and polishing the magnesium alloy matrix, and then cleaning and drying the magnesium alloy matrix; s2, preparing a silicate alkaline electrolyte: dissolving Na2SiO3, KF and NaOH in deionized water at room temperature, performing ultrasonic treatment until the Na2SiO3, the KF and the NaOH are completely dissolved, then adding the TiO2 nano-particles, and continuing ultrasonic treatment until the TiO2 nano-particles are uniformly dispersed in the deionized water to obtain the silicate alkaline electrolyte; and S3, micro-arc oxidation treatment is conducted, specifically, stainless steel serves as a cathode, the pretreated magnesium alloy matrix serves as an anode, the cathode and the anode are put into a silicate alkaline electrolyte, flushing and drying are conducted after micro-arc oxidation treatment, and then the high-abrasion-resistance micro-arc oxidation film layer is formed on the magnesium alloy sample. The structure, the structure and the performance of the magnesium alloy micro-arc oxidation film layer are improved by adding the nano TiO2 particles into the electrolyte, so that the wear resistance of the film layer is improved.

The present application relates to the field of filling glue, and in particular to a high-flowability epoxy resin encapsulated bottom filling glue and a preparation method thereof. The high-flowability epoxy resin encapsulated bottom filling glue, in parts by mass, has the following raw materials: 40 to 60 parts of epoxy resin composition, 10 to 15 parts of active diluent, 20 to 25 parts of curing agent, 1 to 2 parts of accelerator, 20 to 35 parts of modified filler, 1 to 4 parts of coupling agent, 1 to 1.5 parts of leveling agent, and 1 to 3 parts of flame retardant. The epoxy resin encapsulated bottom filling glue prepared in the present application not only has good stress impact resistance, mechanical properties and flow properties, but also can maintain excellent moisture resistance, water resistance, corrosion resistance, acid and alkali resistance and other properties, thereby greatly improving the application performance of the filling glue and having very excellent application prospects.