36 results about "Bismuth trioxide" patented technology

The invention discloses a NiCu-based alloy catalyst for preparing high-value products through natural gas decarbonization and application of the NiCu-based alloy catalyst, and belongs to the technical field of natural gas high-value catalytic conversion. The preparation method of the NiCu-based alloy catalyst comprises the following steps: (1) adding nickel nitrate hexahydrate and urea into hot water, adding ethylene glycol, carrying out a stirring reaction at 120-150 DEG C, and calcining the obtained intermediate to obtain a nickel oxide precursor; (2) adding a copper nitrate aqueous solution and ammonia water into the nickel oxide precursor, so that copper ions are anchored on the surface of nickel oxide, drying and calcining to obtain a Ni-Cu alloy oxide precursor; and (3) adding the Ni-Cu alloy oxide precursor, bismuth trioxide and metallic tin into deionized water, adding a complexing agent, carrying out ultrasonic treatment, and carrying out H2 reduction calcination on the obtained precipitate to obtain the Ni < x > Cu < y > Bi < z > Snm alloy. The NiCu-based alloy catalyst is used in a natural gas decarburization high-value product preparation reaction, and the natural gas decarburization reaction is sufficient, and long-term efficient conversion and stable operation are achieved by combining the synergistic effect of ultrasonic waves and an alternating magnetic field.

The present application relates to a kind of preparation method of bismuth trifluoride, belong to bismuth compound preparation technical field.The preparation method of bismuth trifluoride of the present application includes the following steps: bismuth-containing compound powder is hydrothermally reacted with hydrofluoric acid;The bismuth-containing compound is one or any combination of bismuth oxide, bismuth oxychloride, bismuth trichloride.The preparation method of bismuth trifluoride of the present application carries out hydrothermal reaction to bismuth oxide, bismuth oxychloride, bismuth trichloride and hydrofluoric acid, and the high temperature and high pressure generated by hydrothermal reaction are used to improve the reactivity, solve the problem that bismuth oxide, bismuth oxychloride and bismuth trichloride are not completely reacted with hydrofluoric acid under normal pressure, resulting in low yield and low purity, product can be obtained by one-step reaction.The preparation method of bismuth trifluoride of the present application is simple, and route is short, the solvent used is water, cost is low, yield is high, and it is economic and environmental protection.

The invention belongs to the technical field of electrochemical sensing, and discloses a preparation method and application of BiOCl and a bismuth membrane electrode. The preparation method of BiOCl comprises the following steps: heating and dissolving bismuth nitrate into concentrated nitric acid, then adding bismuth trioxide into the solution, then adding concentrated hydrochloric acid, fully stirring, standing and cooling to room temperature to obtain a solution A; preparing a 15-25 wt% sodium hydroxide solution as a solution B; the preparation method comprises the following steps: adding water into a reaction container, heating to 65-85 DEG C, then adding concentrated hydrochloric acid, then adding a non-sulfur non-phosphorus surfactant while stirring, stirring until the solution is clear, simultaneously dropwise adding the solution A and the solution B into the reaction container, reacting for 15-15.5 hours, then dropwise adding the solution B again, adjusting the pH value of the solution to 9-11, cooling to room temperature, and drying to obtain the target product BiOCl. The bismuth membrane electrode is obtained by modifying a carbon fiber electrode with BiOCl. The bismuth membrane electrode can be used for detecting one or two of Pb < 2 + > content and Cd < 2 + > content in a water body / blood, and can also be used for integrating a portable heavy metal detection device.

The utility model discloses a film-coated cover plate capable of adjusting optical performance and a smart phone display screen, the film-coated cover plate capable of adjusting optical performance comprises a glass cover plate, and an aluminum oxynitride layer, a beryllium oxide layer and a bismuth trioxide layer which are arranged on the upper surface of the glass cover plate in sequence from bottom to top, the thickness of the aluminum oxynitride layer is 20nm-30nm, and the thickness of the beryllium oxide layer is 20nm-30nm. The thickness of the beryllium oxide layer ranges from 30 nm to 40 nm, and the thickness of the bismuth trioxide layer ranges from 10 nm to 20 nm. And the aluminum oxynitride layer is used as an adhesion layer, so that the adhesion between the subsequent plating layer and the glass cover plate can be enhanced. The bismuth trioxide layer serves as the outermost layer, possibly has specific optical and electrical properties and can be used for adjusting the optical performance of the coating layer, such as increasing the light transmittance and the refractive index, so that the optical performance of the coating layer is adjustable, and the competitiveness of the product is improved.

The application provides a method for preparing bismuth trioxide-cuprous oxide nanocomposite based on a synergistic reaction, which comprises the following steps: dispersing sodium bismuthate, sodium sulfite and cuprous chloride in deionized water to obtain a solid-liquid mixture; and placing the solid-liquid mixture under a hydrothermal condition, so as to in-situ prepare the Bi2O3-Cu2O nanocomposite through the synergistic effect of the redox reaction between sodium bismuthate and sodium sulfite in the system and the anion exchange reaction between cuprous chloride and hydroxyl ions generated in-situ. The application is based on the synergistic effect of the redox reaction and the anion exchange reaction under the same hydrothermal condition, and high-purity Bi2O3-Cu2O nanocomposite can be prepared in-situ in one step without adding an alkali source and a template agent. The prepared composite can effectively form a p-n heterojunction, significantly inhibit the recombination of photo-generated carriers, improve the photocatalytic activity and redox capacity of the material, and the preparation process is simple, green and economical, and easy for industrialized production.

The invention belongs to the technical field of ceramic metal composite materials, and particularly relates to a multiphase ceramic composite plate and a preparation method thereof, and a metal-based ceramic composite lining plate for a ball mill and a preparation method thereof. The composite material comprises the following components in parts by weight: 70-90 parts of zirconium oxide, 5-10 parts of silicon carbide, 5-10 parts of aluminum oxide, 2-6 parts of titanium dioxide, 2-5 parts of tungsten carbide, 2-4 parts of scandium oxide, 2-4 parts of cobalt oxide, 1-3 parts of potassium tantalate, 1-3 parts of potassium titanate, 1-2 parts of bismuth trioxide and 1-2 parts of erbium oxide. A compact ceramic plate is obtained through mixing, wet grinding, drying, pressing and high-temperature sintering, and the special-shaped ceramic sheet is formed through further crushing and screening. The special-shaped sheet is laid in a mold and filled with high-chromium cast iron powder, and the integrated metal-based ceramic composite lining plate with a stable structure is formed through compaction and high-temperature sintering. The prepared lining plate has the high hardness of ceramic and the toughness of metal, and is suitable for high-abrasion equipment such as a ball mill.

The invention discloses an anti-radiation shielding plate and a preparation method thereof. The anti-radiation shielding plate comprises a middle core layer and two surface reinforcing layers, wherein the two surface reinforcing layers are correspondingly compounded on the upper end face and the lower end face of the middle core layer; the middle core layer comprises the following components in percentage by mass: 25%-45% of tantalum pentoxide (Ta2O5), 26%-46% of bismuth trioxide (Bi2O3), 4%-16% of thulium oxide (TM2O3), 8%-22% of natural rubber (NR) and 2%-6% of a coupling additive; the surface reinforcing layer comprises the following components in percentage by mass: 5%-25% of boron carbide (B4C), 2%-10% of thulium oxide (TM2O3), 65%-85% of natural rubber (NR) and 2%-6% of a coupling additive. The radiation-proof shielding plate has the advantages that through function layering, material cooperation and matrix supporting, the triple core advantages of full-spectrum radiation protection, mechanical property balance and environment-friendly and convenient processing are achieved, the problems that a traditional shielding material is single in function, unbalanced in performance and serious in pollution are solved, industrial production and actual requirements are taken into consideration, and the radiation-proof shielding plate is worthy of popularization and application. And the method can adapt to multi-scene application and is high in use adaptability.

The present invention discloses a polyvinyl chloride composition and polyvinyl chloride artificial leather thereof. The polyvinyl chloride composition comprises a polyvinyl chloride resin, a plasticizer, and a flame retardant. The flame retardant comprises only bismuth trioxide or comprises both antimony trioxide and the bismuth trioxide. The present invention completely or partially replaces non-environmentally friendly antimony trioxide with environmentally-friendly bismuth trioxide, while still ensuring flame retardant performance of the polyvinyl chloride artificial leather prepared from the polyvinyl chloride composition, which not only enhances environmental protection and safety but also maintains the flame retardant performance and provides lower cost.

The utility model relates to a double-layer wear-resistant film-coated cover plate and a display screen comprising the same, the double-layer wear-resistant film-coated cover plate comprises a cover plate body, and a bismuth trioxide layer, a zirconium nitride layer and a niobium nitride layer are sequentially laminated on the front surface of the cover plate body; wherein the thickness of the bismuth trioxide layer is 20-30 nm, the thickness of the zirconium nitride layer is 40-50 nm, and the thickness of the niobium nitride layer is 30-40 nm. By accurately controlling the thickness and the layered structure of each material layer, the wear resistance, the corrosion resistance, the optical performance and the functionality of the glass cover plate are remarkably improved. In addition, by adjusting the thickness of each layer and optimizing the layered structure, the technology can flexibly meet specific requirements in different application scenes.

This invention discloses a positive electrode paste for lead-acid batteries, its preparation method, and its application, belonging to the field of battery technology. The raw materials for the positive electrode paste include the following components: lead powder, sulfuric acid solution, deionized water, synthetic fiber, bismuth trioxide, conductive agent, polytetrafluoroethylene dispersion (based on solid content), and other additives. The lead powder is mainly composed of a mixture of elemental lead and lead oxide. The concentration of the sulfuric acid solution is 1.3~1.4 g / mL. The conductive agent is selected from conductive carbon black and conductive graphite. Through the combined effect of the above components and their contents, this invention enables the positive electrode paste for lead-acid batteries to possess high-rate discharge performance, high structural stability, and long cycle life. Lead-acid batteries prepared using this paste maintain high energy density while also exhibiting excellent electrical performance and cycle stability, solving the problems of low power density and poor cycle performance in traditional lead-acid batteries.

The invention relates to the field of resistor discs, and particularly discloses a metal oxide resistor disc and a preparation process thereof, and the preparation process comprises the following steps: S1, mixing zinc oxide, antimony trioxide, chromium sesquioxide, manganese dioxide, aluminum nitrate and silver nitrate to prepare a slurry, adding a surface modifier, and mixing to prepare a mixed slurry; s2, drying the mixed slurry to obtain prefabricated powder, pre-sintering the prefabricated powder to obtain a pre-sintered mixture, grinding the pre-sintered mixture, and drying the ground pre-sintered mixture to obtain additive composite powder; s3, manganese carbonate, bismuth trioxide, nickel oxide and cobaltosic oxide are mixed to serve as an additive mixture, a tin dichloride solution is added, and a mixed solution to be deposited is prepared after stirring; s4, mixing the to-be-deposited mixed solution with an adhesive, absolute ethyl alcohol and additive composite powder, then drying, carrying out compression molding, and then carrying out calcination treatment; and S5, performing post-treatment to obtain the metal oxide resistor disc. The resistor disc has the advantages that the porosity of the resistor disc is reduced, the through-flow capacity is improved, and the electrical performance is improved.

The utility model discloses a novel film-coated cover plate capable of enhancing the durability of a film layer and a liquid crystal display screen, and the novel film-coated cover plate capable of enhancing the durability of the film layer comprises a glass cover plate, and an aluminum oxynitride layer, a silicon carbide layer and a bismuth trioxide layer which are sequentially arranged on the upper surface of the glass cover plate from bottom to top, the thickness of the aluminum oxynitride layer ranges from 50 nm to 100 nm, the thickness of the silicon carbide layer ranges from 100 nm to 200 nm, and the thickness of the bismuth trioxide layer ranges from 20 nm to 50 nm. Each layer of material is meticulously selected and designed so as to realize specific functions and benefits. The aluminum oxynitride of the bottom layer provides good adhesive force and protection, the silicon carbide of the middle layer enhances wear resistance and thermal management capability, and the bismuth trioxide of the surface layer is used for adjusting optical performance. The design of the layered structure not only considers the unique properties of the materials, but also considers the interaction among the materials, so as to ensure that the final product shows excellent comprehensive performance in practical application.

The invention relates to the technical field of nickel-zinc batteries, in particular to negative electrode slurry for a nickel-zinc battery and a preparation method and application thereof.The negative electrode slurry is prepared from, by mass, 0.2-0.4 part of hydroxyethyl cellulose, 50-55 parts of zinc oxide, 15-17 parts of zinc powder, 0.1-0.3 part of dispersing agent, 3-5 parts of nanometer aluminum oxide, 1.5-2 parts of bismuth trioxide, 0.03-0.1 part of indium oxide, 0.1-0.3 part of potassium fluoride, 4-5 parts of polytetrafluoroethylene solution and 17-21 parts of water. According to the negative electrode slurry for the nickel-zinc battery as well as the preparation method and the application of the negative electrode slurry, the cycle life is prolonged, the rate capability is improved, and the defects in the prior art are overcome.

The application discloses a copper electrode zinc oxide varistor and a preparation method and application thereof, and relates to the technical field of varistor materials.The varistor disc preparation material is composed of zinc oxide, bismuth trioxide, nickel oxide, tricobalt tetroxide, manganese dioxide, boric acid, aluminum nitrate nonahydrate, antimony trioxide, yttrium oxide and chromium oxide, is subjected to ball milling mixing, granulation, compression molding, glue removal, sintering to obtain ceramic black sheets, and is subjected to copper electrode printing and burning and permeation in a nitrogen atmosphere to obtain a copper electrode varistor.The application effectively reduces the raw material cost under the premise of ensuring the quality of the grain boundary by replacing Sb2O3 with Y2O3, and simultaneously, the Cr 3+ The segregation at the grain boundary and the second phase precipitation form a grain boundary pinning effect, abnormal growth of ZnO grains is inhibited, and the grain size distribution is more concentrated.The application improves the nonlinear coefficient of the copper electrode varistor, reduces the leakage current and the residual voltage ratio, and the comprehensive electrical performance is excellent.

The invention relates to the technical field of special ceramic product manufacturing, and discloses a PTC ceramic material for water circulation electric heating and a preparation method and application of the PTC ceramic material for water circulation electric heating. According to the preparation method, an oxygen partial pressure environment is adjusted in a sintering cooling section, and a grain boundary modifier is induced to spread on the surface of the grain in a self-organizing manner and is condensed to form a film, so that an ion immobilization layer with a charge compensation function is constructed; the interface blocking structure is used for blocking a moisture permeation path, the electrochemical stability of the material in a pressure-bearing hot water circulation environment is ensured, Curie temperature drift is inhibited, and the ceramic valve plate is suitable for manufacturing a ceramic valve plate in an electric heating system.

The application belongs to the technical field of electronic materials, and specifically discloses a high-dispersion aluminum-doped zinc oxide voltage-dependent resistor material and a preparation method thereof. The high-dispersion aluminum-doped zinc oxide voltage-dependent resistor material comprises the following raw materials in parts by weight: pretreated zinc oxide 90-92 parts, bismuth trioxide 2-3 parts, cobalt oxide 0.7-0.9 parts, aluminum trioxide 1.5-1.8 parts, silicon dioxide 1.2-1.5 parts, manganese oxide 0.6-0.8 parts, tin oxide 0.07-0.09 parts, and nickel trioxide 0.2-0.5 parts. The pretreated zinc oxide reduces the agglomeration of zinc oxide, and the subsequent cooperation with other components improves the performance stability of the voltage-dependent resistor, reduces the leakage current, and prolongs the service life.

The application discloses a conductive silver paste for photovoltaic cells and a preparation method thereof. The conductive silver paste comprises the following raw materials in percentage: 65-85% of silver powder and 1-3% of modified binder, and the rest is an organic carrier. In the printing process of the conductive silver paste, the substances in the organic carrier contact the silver powder, so that the silver chelate in the organic carrier is fully contacted, and then a stable conductive path can be formed during baking. The modified binder is a lead-free glass formed by taking bismuth trioxide as a main raw material to form a bismuth-based glass. The addition of calcium fluoride in the raw material can reduce the water absorption of the bismuth-based glass, thereby ensuring the stability of the resistivity. The addition of titanium dioxide can exist in a quadruple coordination form, so that the Si-O-Si bond in the glass is changed into a Si-O-Ti bond, thereby forming an interconnected tetrahedral structure, increasing the network connectivity of the glass, and simultaneously increasing the antireflection effect of the glass and the utilization rate of light energy.

The application discloses a kind of steel identification traceability with high temperature ink and preparation method thereof, it is related to high temperature ink technical field, to solve the problem that prior art cannot meet the comprehensive application needs of steel high temperature online identification, low light high efficiency identification, by weight parts include: 20-30 parts rare earth glass frit powder, 5-10 parts inorganic pigment, 2-4 parts adhesion agent, 10-20 parts deionized water, 5-12 parts dispersing agent, 20-45 parts humectant, 0.05-0.15 parts defoaming agent, 0.05-0.15 parts PH regulator, 0.03-0.06 parts preservative;The melting temperature of the rare earth glass frit powder is 450-750 DEG C, and it includes by weight parts: 10-30 parts silicon dioxide, 5-10 parts aluminium oxide, 25-35 parts bismuth trioxide, 5-10 parts europium trioxide, 3-5 parts dysprosium trioxide, 5-10 parts boron trioxide, 3-8 parts calcium oxide, 2-4 parts strontium oxide, 1-3 parts magnesium oxide, 3-8 parts sodium oxide, 1-3 parts potassium oxide.The application has the advantages of enhancing the high temperature bonding performance of ink and low light color development and identification.

The application relates to the field of electronic materials, and particularly discloses a low-gradient zinc oxide varistor disc and a preparation method thereof; the low-gradient zinc oxide varistor disc comprises the following raw materials in parts by weight: 88-96 parts of zinc oxide, 1.5-3 parts of diantimony trioxide, 2-5 parts of bismuth trioxide, 0.2-1.8 parts of nickel oxide, 0.1-0.9 parts of cobalt trioxide, 0.1-0.4 parts of manganese oxide, 0.02-0.07 parts of chromium trioxide, 0.15-0.18 parts of lithium acetate, 1.2-1.8 parts of a dispersing agent, 1.8-2.5 parts of a binding agent, 0.12-0.15 parts of aluminum nitrate and 0.001-0.003 parts of silver nitrate; under the synergistic action of the components, the use ratio of the components is adjusted, the potential gradient of the varistor disc is reduced, the large-current resistance of the varistor disc is improved, and the change of the electrical performance after impact is reduced.

The invention discloses a polyvinyl chloride composition and polyvinyl chloride artificial leather thereof. The polyvinyl chloride composition comprises polyvinyl chloride resin, a plasticizer and a flame retardant. The flame retardant only comprises bismuth trioxide or comprises antimony trioxide and bismuth trioxide. The environment-friendly bismuth trioxide completely or partially replaces non-environment-friendly antimony trioxide, the flame retardant property of the polyvinyl chloride artificial leather prepared from the polyvinyl chloride composition can still be guaranteed, the environment friendliness and safety are improved, the flame retardant property is guaranteed, and the price is lower.

The application provides a low-shrinkage ceramic composite material and a preparation method thereof. The low-shrinkage ceramic composite material is prepared by using bismuth trioxide, boron nitride and aluminum oxide as raw materials, mixing and ball milling, pre-sintering, adding a binder to the pre-sintered material, granulating, pressing and sintering, and adopting a solid phase sintering method, so that the shrinkage rate, mechanical property and thermal conductivity can be well balanced; or the low-shrinkage ceramic composite material is prepared by adding a solvent, a dispersing agent, a binder and a plasticizer to the pre-sintered material, ball milling to obtain a uniform slurry, casting the mixed slurry into a green ceramic sheet, and performing glue removal and sintering after cutting the green ceramic sheet, so that the shrinkage rate of a single-layer sintered sheet is less than 5%, and the shrinkage rate of a five-layer laminated sintered sheet is less than 1%. The preparation process is simple and easy to implement, and the application prospect is wide in the fields of electronic packaging, precision part manufacturing and dentistry.

The application belongs to the field of porcelain dielectric capacitor preparation, and particularly relates to a base metal high-voltage multilayer porcelain dielectric capacitor and a ceramic dielectric material and a preparation method thereof. The ceramic dielectric material comprises the following molar parts of raw materials: 100 parts of a BST main matrix, and 0.5-2.0 parts of NBT material. The BST main matrix comprises the following raw materials: BT material, strontium titanate, magnesium oxide, trimanganese tetroxide, zirconium dioxide, calcium carbonate, rare earth oxide, niobium pentoxide, and silicon dioxide. The NBT material is composed of bismuth trioxide, sodium carbonate, and titanium dioxide in a molar ratio of 2:1:1. The application limits the composition of raw materials and the preparation method of the multilayer porcelain dielectric capacitor, and obtains excellent performances such as a dielectric constant (>=2000), low loss (<=2%), super-high withstand voltage (BDV >=100 V / um), high insulation resistance (RC@25 DEG C >=2000 M omega mu F, RC@125 DEG C >=200 M omega mu F), good temperature stability, and compliance with X7R requirements.

This invention belongs to the technical field of resistive electrical components, and specifically relates to a method for preparing a zinc oxide resistor with high gradient and high current flow stability. The zinc oxide resistor comprises: zinc monoxide, bismuth trioxide, antimony trioxide, nickel trioxide, manganese tetroxide, cobalt tetroxide, tin dioxide, boron trioxide, nano-silver powder, aluminum nitrate nonahydrate, barium acetate, binder, dispersant, and deionized water. The zinc oxide resistor designed in this invention has the advantage of good stability under high gradient and high current flow, overcoming the degradation behavior of existing zinc oxide varistors caused by the influence of high current surge impact on the zinc monoxide grain boundary barrier, and is suitable for industrial application.

The application belongs to the technical field of photocatalyst preparation, and discloses a preparation method of a bismuth-based semiconductor heterojunction photocatalyst. The catalyst contains the following components in mass fraction: active component 5-50%, oxide carrier 50-95%; wherein the active component contains bismuth-based metal oxides (Bi x MO y , M is a transition metal); and the carrier is bismuth trioxide (Bi2O3). The obtained Bi x MO y / Bi2O3 heterojunction photocatalyst has a unique electronic structure, high light spectrum response, high carrier separation efficiency, simple preparation method and the like, and exhibits excellent selectivity, stability and solar energy conversion efficiency in photocatalysis such as carbon dioxide reduction, and has wide application prospect.

The application relates to the technical field of lead-free coating, and discloses a lead-free coating applied to a resistor and a preparation method thereof. After cold pressing, ball milling and heat treatment, mixed powder is prepared from bismuth trioxide, aluminum trioxide, boron trioxide, potassium oxide and calcium fluoride. Grafted nano-silicon dioxide is prepared by grafting hyperbranched polyesters prepared from polymeric esters prepared by polymerization of acrylic acid, polyurethane and chitosan. Modified hydroxyethyl cellulose is prepared by modification of dodecylpyridine bromide. The lead-free coating prepared by the application has good explosion-proof performance, can not be cracked in the conversion process of low pressure and high pressure, the adhesion is greatly improved, the lead-free coating is not easy to fall off in the use process, the service life is prolonged, the lead-free coating has good hydrophobic performance and is easy to clean. The process is simple, harmful pollutants are not easy to be generated, and the process meets the green production requirement.

Preparation method of a cathode material for a doped manganese-based sodium ion battery, comprising the following steps: S1: Dissolving one or both of antimony trioxide and bismuth trioxide with an acid and subsequently adding a divalent manganese salt to produce a mixed metal salt solution; S2: Adding the mixed metal salt solution to an excess alkaline oxidizing agent solution for the reaction, and after the reaction is complete, carrying out a solid-liquid separation to obtain a solid material, such that manganese ions are oxidized to manganese dioxide, and antimony is co-precipitated with the manganese dioxide to a form of sodium hexahydroxyantimonate, or bismuth is co-precipitated with the manganese dioxide to a form of sodium bismuthate, thereby ensuring the homogeneity of doped elements in the cathode material and achieving atomic-level mixing between the elements; and S3: Drying the solid material and subsequent mixing with a sodium source and sintering of a resulting mixture to obtain the cathode material for the doped manganese-based sodium ion battery; wherein, in step S2, the alkaline oxidizing agent solution is a sodium hydroxide solution in which one or more of sodium hypochlorite, sodium chlorate, and sodium permanganate are dissolved; wherein, in step S2, the mixed metal salt solution is added dropwise, the alkaline oxidizing agent solution always has a pH equal to or greater than 10.5, and one oxidizing agent in the alkaline oxidizing agent solution is always sufficient; and wherein, in step S2, the temperature of the reaction is controlled to between 2 °C and 10 °C.

This invention provides a high-performance nano-cement alloy, its preparation method, and its application in milling cutters. By weight, it comprises the following components: 90.5-98.5 parts WC powder, 3-6 parts tungsten powder, 1-3 parts nano-nickel powder, 0.3-0.7 parts bismuth trioxide, 0.5-1.5 parts chromium boride, and 0.6-1.2 parts rare earth metal powder; the rare earth metal powder includes lanthanum, cerium, yttrium, and rubidium, with a mass ratio of 1:1.2-1.5:0.8-1.2:0.4-0.8; the WC powder has a particle size of 0.3-0.8 nm. The cemented carbide prepared by this invention possesses excellent toughness, hardness, and bending strength, making it better suited for use in milling cutter manufacturing.

The invention discloses a polyester powder coating as well as a preparation method and application thereof. The polyester powder coating is prepared from the following raw materials: modified polyester resin, a curing agent, a first filler and a second filler, the modified polyester resin comprises the following raw materials: alkyl dihydric alcohol, aromatic dibasic acid, an acidolysis agent and polyhedral oligomeric silsesquioxane containing at least two terminal carboxyl groups, and the modified polyester resin is prepared by the following method: after the alkyl dihydric alcohol and the aromatic dibasic acid react, adding the acidolysis agent and the polyhedral oligomeric silsesquioxane containing at least two terminal carboxyl groups; reaction generation; the first filler comprises titanium dioxide, and the second filler comprises barium carbonate, anhydrous boric acid, bismuth trioxide and zirconium oxide; during preparation, all the raw materials are mixed and extruded to prepare the powdery coating. The polyester powder coating disclosed by the invention has relatively good flame retardance, weather resistance, mechanical properties and the like, and is suitable for coating materials such as steel in various scenes.

The invention discloses positive lead paste of a lead-acid storage battery for long-service-life power, a preparation method and application. The invention provides positive lead paste of a lead-acid storage battery for long-life power. The positive lead paste comprises the following components in parts by weight: 80-85 parts of lead powder; 5-10 parts of sulfuric acid; 8 to 12 parts of pure water; 0.1 to 0.15 part of graphite; 0.08 to 0.1 part of short fiber; 0.08 to 0.1 part of antimony trioxide; 0.1 to 0.12 part of stannous mono-sulphate; 0.05 to 0.1 part of bismuth trioxide; and 0.05 to 0.1 part of rubidium hydroxide. Bismuth trioxide and rubidium hydroxide are added into a conventional lead paste formula, so that the binding force between active substances and a grid and the binding force between the active substances are improved, and the cycle life of the battery is further prolonged.

The invention relates to the field of open-cell foam materials, in particular to a TPU (thermoplastic polyurethane) composite foam material with an open-cell structure and a preparation method thereof, and the TPU composite foam material comprises the following components in parts by weight: 60-90 parts of TPU, 10-40 parts of EVA (ethylene-vinyl acetate) and 0.5-2.5 parts of a catalyst; the catalyst is a mixture of zinc diethyl dithiocarbamate and bismuth trioxide. Zinc diethyldithiocarbamate and bismuth trioxide are compounded into a catalyst to be added into a system, so that the compatibility between TPU and EVA can be improved through two aspects of physical coordination bridging and catalytic ester exchange, the EVA can be uniformly dispersed in a TPU matrix in a smaller particle form, and the EVA can be used as a pore opening agent, so that the compatibility between TPU and EVA can be improved. The aperture ratio of the TPU composite foaming material is improved, so that the TPU composite foaming material with excellent performance is prepared.