204 results about "Antimony oxide" patented technology

The invention discloses a fluoride salt-free nitrate-free cast iron enamel semitransparent glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, sodium carbonate, potassium carbonate, calcium carbonate, potassium feldspar, zinc oxide, lithium carbonate, zirconium silicate, titanium dioxide, aluminum oxide, trisodium phosphate, antimony oxide, magnesium carbonate and barium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for cast iron matrixes, the firing temperature is 740-760 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention provides laser-assisted sintering base metal slurry for a TOPCon solar cell and a preparation method of the laser-assisted sintering base metal slurry, and relates to the technical field of photovoltaic cell manufacturing, the slurry comprises the following components: nickel powder, glass powder and an organic carrier; wherein the glass powder at least comprises two types of glass powder, one type of glass powder is corrosive glass powder, and the corrosive glass powder at least comprises one or two of lead oxide, bismuth oxide or antimony oxide; the other kind of glass powder is auxiliary promotion type glass powder, and the auxiliary promotion type glass powder takes silicon and borate as main bodies; the two kinds of glass powder do not contain first main group element oxides. The nickel powder is used for replacing silver powder, the contact defect is made up through the LECO technology, the specific glass powder formula and the high-temperature sintering technology are combined, performance balance is achieved, and verification experiments prove that the nickel paste achieves the same efficiency (gt; 24.5%), and the cost is reduced by about 30%-40%.

The invention discloses a composite clarifying agent for alkali-free glass and a manufacturing method of an alkali-free glass substrate, and relates to the technical field of glass manufacturing, the composite clarifying agent for alkali-free glass comprises the following components by mass: 12-30% of ammonium chloride, 48-73% of sulfate, and 11-25% of calcium fluoride; the preparation method comprises the following steps: adding a composite clarifying agent accounting for 0.2-1.2% of the total weight of the glass raw material into the glass raw material, uniformly mixing to form a batch, and carrying out melting, molding, spraying, annealing, cutting, alkali cleaning and other processes on the batch to finally prepare the glass substrate. The prepared composite clarifying agent does not contain toxic substances such as arsenic oxide and antimony oxide, the glass substrate produced by using the clarifying agent not only has an excellent clarifying effect, but also can recycle SO2 and NH3 gas generated in the melting process, can effectively solve the quality problems such as micro-flaws on the surface of the glass substrate in the production process, and has a good application prospect. And the production cost can be reduced and the product quality can be improved.

The invention relates to the technical field of heat dissipation materials, and discloses a graphite cooling fin of a multi-layer composite structure and a manufacturing process of the graphite cooling fin of the multi-layer composite structure. 15 to 25 parts of artificial graphite powder; 3 to 8 parts of an aniline-p-phenylenediamine copolymer; 2 to 6 parts of antimony oxide nano particles; 2 to 5 parts of urea; 1 to 3 parts of polyvinylpyrrolidone; the preparation method comprises the following steps: carrying out heat treatment on the artificial graphite film, and then carrying out mechanical pulverization; mixing the graphite oxide with an ethanol or water mixed solvent containing ammonia water; mixing the raw materials; performing vacuum defoamation and then coating on a base material; and performing carbonization treatment on the graphene film crude product, and performing lamination calendering treatment to form a final product. According to the technical scheme, the antimony oxide nano particles are adopted to synergistically adjust the heat conductivity, the effect of remarkably improving the transverse heat conductivity of the film body is achieved, the heat conductivity is enhanced, and material embrittlement caused by overfilling is avoided.

The invention provides a high-voltage low-loss dielectric material and a preparation method thereof, and relates to the technical field of high-voltage ceramic capacitors, and the high-voltage low-loss dielectric material comprises the following raw materials in parts by mass: 35-38 parts of barium titanate, 20-29.5 parts of strontium titanate, 15-17.5 parts of titanium dioxide, 9-12 parts of bismuth oxide, 3-4 parts of zirconium oxide, 0.8-1.0 part of X, 1.2-1.4 parts of antimony oxide, 1-1.2 parts of calcium carbonate and the like. The preparation method of the dielectric material comprises the following steps: 1, preparing the dielectric material; melting calcium carbonate, magnesium oxide, zinc oxide and the like, performing water quenching, and performing ball-milling granulation to obtain zinc borosilicate glass powder; uniformly mixing the zinc borosilicate glass powder with barium titanate, strontium titanate, titanium dioxide and the like, and granulating to obtain oxide powder; and tabletting and sintering the oxide powder to obtain the high-pressure low-loss dielectric material. The high-voltage low-loss dielectric material is high in dielectric constant, small in dielectric loss, high in compression strength and good in high-temperature stability, and the preparation method is simple.

The invention provides an anti-corrosion flame-retardant multiple-effect upgraded full-scene high-performance coating composition and application thereof. The anticorrosive flame-retardant multiple-effect upgraded full-scene high-performance coating composition is prepared from the following components in parts by mass: 20 to 40 parts of modified polysiloxane, 40 to 70 parts of polyurethane emulsion, 5 to 10 parts of flame retardant, 2 to 5 parts of cosolvent, 2.5 to 8 parts of auxiliary agent, 1 to 3 parts of color paste and 20 to 50 parts of solvent, wherein the modified polysiloxane is obtained by reacting antimony oxide, a silane coupling agent, vinyl POSS (Polyhedral Oligomeric Silsesquioxane), a cross-linking agent and methacryloyloxypropyl double-terminated polydimethylsiloxane. According to the present invention, the product can be endowed with the strong flame retardant property, the compatibility among the components is improved, the stability, the corrosion resistance and the weather resistance of the coating are significantly improved, and the coating can be used for a long time, can be widely used in the fields of water resistance, building, art coatings and the like, solves the problems in the prior art, and has good application prospects. Good application prospects are realized.

The invention belongs to the technical field of polyester master batches, and particularly relates to a damp-heat-resistant ultraviolet barrier polyester master batch and a preparation method thereof. The invention discloses an anti-ultraviolet polyethylene glycol terephthalate composite material, which is prepared from the following raw materials in parts by weight: 85 to 90 parts of polyethylene glycol terephthalate, 10 to 15 parts of anti-ultraviolet agent, 3 to 5 parts of epoxy-terminated polyether and 1 to 3 parts of lubricant, wherein the anti-ultraviolet agent is a modified intermediate obtained by modifying a nano light screening agent by a carboxylic ester coupling agent according to a mass ratio of (3 to 5): 100; the modified intermediate and a hydroxybenzophenone derivative are subjected to a grafting reaction according to the mass ratio of 100: (5-8); the nano light screening agent is selected from one or a combination of two or more of nano zinc oxide, nano titanium dioxide, nano cerium oxide, nano tin antimony oxide and nano carbon black. The dispersion effect of the anti-ultraviolet agent in the master batch is improved, and the ultraviolet barrier and the light transmittance are improved; meanwhile, the anti-ultraviolet agent is subjected to ester exchange with PET in the screw extrusion process, so that the interaction with PET is enhanced, migration in a humid and hot environment is avoided, and the ultraviolet shielding performance is lasting and stable.

The invention belongs to the technical field of nano materials, and particularly relates to a preparation method of antimony sulfide with good crystallinity and application of the antimony sulfide in a sodium ion battery. Antimony oxide is used as an antimony source, sulfide salt is used for dissolving the antimony source, antimony sulfide precipitates are obtained by adjusting the pH value of the solution, and the method specifically comprises the following steps that S1, the sulfide salt and antimony oxide are evenly mixed and then stirred at a high speed in water to be dissolved, a dispersing agent is added, and an antimony solution is obtained; s2, controlling the temperature of the antimony solution, adding an acid solution, adjusting the pH value, and stirring for reaction to obtain a precipitate; s3, filtering out the precipitate obtained in S2, washing with absolute ethyl alcohol for three times, and then drying at low temperature to obtain antimony sulfide particles; and calcining the antimony sulfide particles under the protection of inert gas to obtain the nano antimony sulfide with good crystallinity. The method has the advantages that the prepared nano antimony sulfide is uniform in granularity, good in dispersity and controllable in morphology; the product has the advantages of few impurities, high yield and high yield; the technological process is simple and low in cost.

The invention provides a high-performance polyamide flame-retardant composite material based on element synergistic effect and a preparation method thereof, and belongs to the technical field of polyamide flame-retardant materials. The preparation method comprises the following steps: preparing a phosphorus-nitrogen flame retardant, preparing a surface-modified rare earth-silicon-based material, preparing a mixture, extruding and granulating. The step of preparing the mixture comprises the following steps: uniformly mixing brominated polystyrene (BPS), a phosphorus-nitrogen flame retardant, a rare earth-silicon-based material, glass fibers, an antioxidant 1098, a heat stabilizer diisooctyl phenyl phosphite, nylon 66 and nylon 6 to obtain the mixture; according to the invention, the use of antimony oxide in the traditional bromine-antimony flame-retardant system preparation process is abandoned, and the preparation process is simple, good in repeatability, green, environment-friendly and efficient.

The invention discloses a preparation method of ultra-smooth low-expansion ceramic glaze for in-situ generation of cordierite, bismuth oxide and antimony oxide are introduced into a high-potassium low-sodium system to form a K-Mg-Sb-Bi multi-element eutectic system, so that the low thermal expansion property and the smooth property of the glaze are realized; in-situ precipitation of cordierite microcrystals in a glaze glass phase is more successfully guided, so that a ceramic glaze surface with excellent comprehensive performance is obtained.

The invention discloses an antimony electrolyte impurity removal adsorbent as well as a preparation method and application thereof, and relates to the technical field of antimony electrolyte purification. The adsorbent is specially used for solving the problem that lead and bismuth ions similar to antimony in potential in the antimony electrolyte are difficult to deeply remove. The preparation method comprises the following steps: mixing sulfuric acid, deionized water, antimony oxide powder and hydrogen peroxide according to a specific mass ratio (1: (0.8-1.5): (0.5-1.5)), and controlling the liquid-solid ratio to be 8-15 mL / g to form a synthetic initial solution; then reacting for 0.5-4 hours under the condition of stirring at the temperature of 60-90 DEG C and the speed of 200-600 r / min; and finally, carrying out solid-liquid separation and drying at 55-110 DEG C for 1-12 hours. When the adsorbent is applied, the adsorbent is added into electrolyte according to the proportion of 500-5000 times of the total mass of lead and bismuth, reaction is performed for 1-6 hours under the conditions of 30-90 DEG C and 200-550 r / min, and deep purification can be realized after standing, settling and separating. The method is short in technological process, mild in condition, easy to operate, environmentally friendly and high in lead and bismuth removal rate, purified liquid can return to an electrolysis system, the saturated adsorbent can be regenerated and reused, and good economic benefits and application prospects are achieved.

The invention discloses a two-dimensional antimony oxide film and a preparation method and application thereof, and the preparation method comprises the following steps: providing a growth substrate and an evaporation source, and placing the growth substrate and the evaporation source in a growth chamber of molecular beam epitaxy equipment; and heating and evaporating the evaporation source, and preparing two-dimensional antimony oxide films with different layers on the growth substrate by utilizing a molecular beam epitaxy process by controlling the temperature of the growth substrate, the temperature of the evaporation source and the growth time. The preparation method disclosed by the invention is simple in process flow, strong in controllability, higher in repeatability and easier to industrially apply.

The present application relates to the technical field of photovoltaic cells, and discloses a multi-element doped tin oxide-based target material, a preparation method therefor, and a use thereof. The described tin oxide-based target material comprises the following components by mass proportion: tin oxide, 95%-98%; zinc oxide, 1%-3%; antimony oxide, 0.5%-1%; cerium oxide, 0.5%-1%. In the tin oxide-based target material of the present application, the zinc oxide doping can promote sintering of the tin oxide-based target material; the cerium oxide doping promotes the growth of tin oxide lattices, and also generates a large number of electrons, which greatly increases the conductivity of a sintered body; the antimony oxide doping provides a large number of free electrons, effectively reducing the resistivity of the tin oxide.

The invention discloses a flame-retardant wear-resistant conveying belt for a coal mine and a preparation method thereof, and belongs to the technical field of wear-resistant conveying belts. Substances such as calcium nitrate tetrahydrate, ferric nitrate nonahydrate and antimony trioxide are subjected to hydrothermal coprecipitation to obtain multifunctional composite microspheres, the microspheres are aminated through a silane coupling agent KH-550 and then coated with silicon carbide, and coated composite microspheres are obtained; the preparation method comprises the following steps: carrying out graft copolymerization on nitrile rubber, octavinyl silsesquioxane and DOPO acrylate, compounding a quaternary phosphonium salt flame retardant to obtain modified nitrile rubber, carrying out three-stage mixing on the modified nitrile rubber, coated composite microspheres, conductive carbon black and other substances to obtain a rubber coating layer, carrying out double-sided calendering on the rubber coating layer and an epoxy resin plasticized aramid fiber skeleton layer, and carrying out vulcanization molding to obtain the composite material. And finally obtaining the flame-retardant wear-resistant conveying belt for the coal mine. The synergistic effect of high flame retardance, strong wear resistance and static electricity resistance is achieved, and the service life is prolonged.

The invention discloses an anti-ultraviolet heat-insulating radiation-proof water-based glass paint and a preparation process thereof. The anti-ultraviolet heat-insulating radiation-proof water-based glass paint is prepared from the following raw materials in parts by weight: 30-50 parts of acrylic resin, 5-10 parts of a coalescing agent, 3-8 parts of butyraldehyde, 10-20 parts of nano titanium dioxide, 8-15 parts of nano tin antimony oxide, 2-5 parts of a polyacrylate dispersant, 2-5 parts of a polyurethane thickener and 15-30 parts of deionized water. Comprising the following steps: S1, weighing deionized water, a polyacrylate dispersing agent and a polyurethane thickening agent according to a ratio, and adding into a stirring kettle; and stirring at the rotating speed of 400rpm for 8 minutes. Through the synergistic effect of the nano titanium dioxide and the nano tin antimony oxide, the anti-ultraviolet, heat-insulating and anti-radiation functions are achieved at the same time, and the problem that an existing glass paint is single in function is solved; the polyacrylate dispersing agent is adopted, so that the dispersity of the nano functional filler is effectively improved, the agglomeration phenomenon is avoided, and the uniformity of the paint film performance is ensured.

The application discloses a novel flexible printed circuit board and camera module prepared based on weldable low-temperature silver paste, and belongs to the technical field of electronic materials and devices. The conductor pattern in the flexible printed circuit board comprises a main circuit pattern and an auxiliary function structure formed by weldable low-temperature cured silver paste. The curing temperature of the weldable low-temperature silver paste is 87-103 DEG C. The silver paste comprises conductive fillers, a polymer resin system, ester solvents, a curing agent, a silane coupling agent, polyamide wax thixotropic agents, polysiloxane defoaming agents, modified carbon nanotubes, modified antimony tin oxide powder, modified ceramic fillers and low-stress modifiers. The polymer resin system comprises hydrogenated bisphenol A type epoxy resin, diphenyl type epoxy resin and polyacrylate-CTBN copolymer. The conductive fillers comprise silver-coated copper flaky powder, nano silver wire and low-temperature alloy powder. Through the synergistic effect of components and the innovative process, the comprehensive improvement of mechanical properties, conductive properties, high-frequency characteristics and welding reliability is realized under the premise of ultralow-temperature curing.

The invention discloses a novel steel-plastic composite protective net plastic formula for a coal mine and a manufacturing process. The novel steel-plastic composite protective net plastic formula comprises PVC three-type resin, PVC elastomer, ground calcium carbonate, paraffin, dioctyl phthalate, aluminum hydroxide, magnesium hydroxide, nano calcium carbonate, halogen flame-retardant master batch, fatty acid barium, DOTP, nitrile rubber, antimony oxide, acrylate, CPEB, silicone rubber, stearic acid, PE wax, phthalocyanine blue and high-melting-point wax. According to the formula design, PVC resin and an elastomer are compounded, and the synergistic enhancement effect of heavy calcium carbonate and nano calcium carbonate is combined, so that a rigid-flexible matrix structure is formed; multiple flame-retardant and smoke-suppressing properties are realized; a flame-retardant system is synergistic; the endothermic decomposition effect of aluminum hydroxide and magnesium hydroxide is combined with a gas-phase flame-retardant mechanism of halogen flame-retardant master batch and antimony oxide;

A modified metal oxide particle sol, when applied as a coating onto a substrate, is capable of having transparency, a high particle refractive index and good coat resistivity. The modified metal oxide particle sol is composed of modified metal oxide particles (iii) in which stannic oxide particles (i) having an average primary particle size of 4 to 50 nm serve as cores and are coated with metal oxide particles (ii) of at least one metal oxide selected from the group consisting of antimony oxide, stannic oxide and silicon oxide and having an average primary particle size of 1 to 10 nm, which modified metal oxide particles (iii) are dispersed in an organic solvent. The average primary particle size of the core particles (i) and the average primary particle size of the coating particles (ii) satisfy the relationshipsize of core particles(i)≥size of coating particles(ii),the ratio (total weight of metal oxides other than stannic oxide) / (weight of stannic oxide) is from 0.005 to 1.0, and the sol includes an amine (a) having a water solubility of 0.1 g / L or more and an amine (b) having a water solubility of less than 0.1 g / L.

The application belongs to the technical field of novel inorganic two-dimensional material preparation, and particularly relates to a method for efficiently and controllably preparing antimony oxide ene in pure water by using a liquid-phase ultrasonic exfoliation method. The method uses high-purity antimony particles as raw materials, and uses a simple liquid-phase exfoliation method to exfoliate the antimony powder to obtain few-layer antimony oxide ene. The preparation method is green, environmentally friendly, simple and easy to operate, can greatly reduce the preparation cost, and the prepared antimony oxide ene has the characteristics of high quality, good dispersity, high yield and high oxidation degree, so as to overcome the technical defects of the prior art method, such as relatively poor quality of the antimony oxide ene sample and environmental pollution in the preparation method.

The invention belongs to the field of waste liquid treatment, and particularly relates to antimony oxide processing waste liquid treatment equipment which comprises an inner ring tank capable of rotating, a treatment tank is fixedly connected to the interior of the inner ring tank, the treatment tank is composed of a plurality of separation tanks which are communicated with one another, the outer side of the treatment tank is sleeved with an outer layer tank, and the outer layer tank is provided with a water inlet and a water outlet. The tops of the treatment tanks are respectively communicated with the outside, the treatment tanks are integrally formed, a plurality of supporting seats for supporting the outer-layer tank are arranged at the bottom of the outer-layer tank, and the whole inner-ring tank is controlled to rotate, so that the plurality of treatment tanks are rotated, and the wastewater is subjected to a sufficient oxidation reaction; by means of the design, the manufacturing cost is greatly reduced, the structure is simple, operation is convenient, meanwhile, operation can be completed only by driving the large-size inner ring tank, and the problem that in a traditional design, due to the fact that a plurality of driving elements are arranged, faults of a single driving piece are prone to occurring, and the whole device stops running is solved.

The invention relates to the technical field of water-based paint preparation, in particular to a preparation method of epoxy resin water-based paint. The coating is prepared from 58 to 89 parts of waterborne acrylic resin, 36 to 59 parts of stearic acid, 22 to 46 parts of dimethyl silicone oil, 24 to 35 parts of calcium chloride, 43 to 55 parts of propylene glycol butyl ether, 32 to 40 parts of nano zinc oxide powder, 28 to 40 parts of hydroxyethyl cellulose, 30 to 47 parts of waterborne epoxy resin, 25 to 30 parts of antimony oxide, 45 to 72 parts of terephthalic acid, 14 to 35 parts of butanol and 22 to 45 parts of calcium lactate. The coating has the beneficial effects that the film-forming property and the corrosion resistance are improved, and the water-based acrylic resin and the water-based epoxy resin combine excellent weather resistance, good cohesiveness and high drying speed of the acrylic resin and good adhesive force, chemical resistance and stability of the epoxy resin, so that the coating has good comprehensive performance; the coating not only can be kept stable under different environmental conditions, but also can resist external chemical erosion and physical wear, and the service life of the coating is greatly prolonged.

This invention relates to the field of glass-ceramic technology, specifically providing a low-temperature co-fired ceramic, its preparation method, and its application. The raw materials for the low-temperature co-fired ceramic include VSBBS glass frit and ceramic frit, with the total weight of the VSBBS glass frit and ceramic frit being 100%. The mass percentages of the VSBBS glass frit and ceramic frit are 20-40% and 60-80%, respectively. The raw materials for the VSBBS glass frit, by mass percentage, include 10-30 wt% vanadium oxide, 10-30 wt% antimony oxide, 10-30 wt% barium oxide, 10-20 wt% boron oxide, and 30-50 wt% silicon oxide, with the sum of all oxides being 100%. The LTCC material obtained by this invention achieves excellent millimeter-wave dielectric properties, with a relative permittivity between 4.8 and 6.8, a dielectric loss less than or equal to 0.001, and a flexural strength of 180-230 MPa.

The invention discloses a resistor disc for a lightning arrester and a preparation method of the resistor disc. The resistor disc is prepared from the following components in parts by weight: 80-95 parts of modified zinc oxide, 3-6 parts of bismuth oxide, 1-4 parts of antimony oxide, 1-4 parts of cobalt oxide, 0.6-1.2 parts of nickel oxide, 0.6-1.2 parts of manganese oxide, 0.4-1.0 part of chromium oxide, 0.2-0.6 part of aluminum oxide and 1-4 parts of lead-free glass powder. Through two-step functional modification of the modified zinc oxide, the microstructure and macroscopic performance of the material are remarkably improved, so that the resistor disc has excellent nonlinear coefficient, low leakage current and high energy absorption capability, and the overall technical scheme not only improves the protection performance and service life of the lightning arrester, but also realizes lead-free environmental protection, energy conservation and consumption reduction, and has wide application prospects. And reliable guarantee is provided for safe and stable operation of a power system.

The invention relates to the technical field of sodium batteries, and discloses a coal-based composite sodium battery negative electrode material and a preparation method thereof.The preparation method comprises the following steps that S1, anthracite is subjected to supercritical CO2 treatment, and a treated body is obtained and mixed with nano antimony oxide; s2, heating the mixture to obtain coal-based graphite; s3, the coal-based graphite is treated through a Hummers method, and the composite material is obtained. According to the method, the pore structure of the anthracite is regulated and controlled in a supercritical CO2 mode, then the nano antimony oxide is doped into pores of the anthracite, the anthracite is charred during subsequent firing and can better wrap antimony, meanwhile, the pore structure and connectivity of the coal are improved by the supercritical CO2, and the volume expansion of the antimony oxide can be greatly relieved. After the treatment, the graphene / Sb composite material formed by oxidation reduction and ultrasonic exfoliation of the graphite can enable the combination of graphene and antimony to be tighter, so that the electrochemical performance is better.

The present application belongs to the field of metallurgy, and relates to a method for producing antimony white by directly oxidizing crude antimony, comprising the following steps: S1, mixing crude antimony with crude antimony alloy, and reacting under an oxygen-containing atmosphere, to obtain oxidized slag and a melt after the reaction is completed; S2, adjusting the temperature of the melt, and then introducing compressed air to react, to produce antimony trioxide-containing flue gas, and to obtain antimony oxide slag after the reaction is completed. The present application makes full use of impurities such as sodium sulfide, sodium hydroxide and sodium thiosulfate contained in crude antimony, and innovatively uses these components for arsenic removal reaction, which not only avoids the cumbersome steps of adding various auxiliary materials in the traditional process, but also enables the original sodium sulfide, sodium hydroxide and sodium thiosulfate in the crude antimony to fully play a synergistic role, showing excellent performance in arsenic removal effect, thus simplifying the process flow, significantly reducing the production cost, and realizing the dual improvement of economic benefit and process efficiency.

Disclosed is a catalyst composition for selective catalytic reduction of nitrogen oxides, consisting of at least one vanadium oxide in an amount of 2.0 to 4.0 wt.-%, calculated as V2O5 and based on the total weight of the catalyst composition; at least one tungsten oxide in an amount of 2.5 to 7.2 wt.-%, calculated as WO3 and based on the total weight of the catalyst composition; at least one antimony oxide in an amount of 0.6 to 3.4 wt.-%, calculated as Sb2O5 and based on the total weight of the catalyst composition; at least one zirconium oxide in an amount of 0 to 1.0 wt.-%, calculated as ZrO2 and based on the total weight of the catalyst; and at least one titanium oxide in an amount of 84.6 to 94.9 wt.-%, calculated as TiO2 and based on the total weight of the catalyst, wherein the weight ratio of the oxides of vanadium, tungsten, antimony, titanium and optionally zirconium, calculated as V2O5, WO3, Sb2O5, TiO2 and optionally ZrO2, respectively, add up to 100 wt.-%. Furthermore, disclosed is an SCR catalytic article, wherein the SCR catalyst composition according to the invention is attached in the form of a coating. Suitable catalyst carriers are corrugated substrates and cordierite monoliths. The SCR catalytic articles can be used in a method for reducing nitrogen oxides in the exhaust gas of lean-burn internal combustion engines, and they can also be included in exhaust gas purification systems for treating diesel engine exhaust gas.

The present invention belongs to the field of metallurgy and relates to a method for synergistically recovering valuable elements from arsenic-antimony fly ash and antimony electrodeposition lean solution. The method comprises the following steps: S1: mixing the arsenic-antimony fly ash with the antimony electrodeposition lean solution for an alkaline leaching reaction, whereupon antimony oxide slag and an arsenic-rich antimony solution are obtained; S2: adjusting the pH of the arsenic-antimony solution obtained in step S1 to a pH of 7-8, whereupon antimony sulfide slag, hydrogen sulfide gas, and an arsenic-rich solution are obtained; and S3: adjusting the pH of the arsenic-rich solution obtained in step S2 to a pH of 1-2, whereupon arsenic sulfide slag, hydrogen sulfide gas, and a sodium sulfate solution are obtained. The present invention utilizes the synergistic reaction of the arsenic-antimony fly ash with the antimony electrodeposition lean solution, and subsequently separates arsenic and antimony from the arsenic-rich antimony solution by reacting sodium thioarsenite (Na3AsS3) and sodium thioantimonite (Na3SbS3) with acid in different sequences. The separation and recovery steps are simple and the recovery rate is high.

The application discloses a steel plate enamel low-temperature nickel underglaze without fluorinated salt and nitrate, a preparation method and application thereof, and belongs to the technical field of enamel. The underglaze is prepared from quartz, zero-water borax, soda ash, potassium carbonate, calcium carbonate, potassium feldspar, sodium feldspar, recycled ternary battery positive material and antimony oxide according to specific mass proportions. The preparation comprises raw material mixing, smelting at 1230±10 DEG C under a pure oxygen environment, and rapid cooling after wire drawing detection of the smelting state. The underglaze completely avoids the use of fluorinated salt and nitrate, eliminates the problems of fluoride emission and environmental protection equipment blockage from the source, the fluorine content of the product is not detected, and the limit value requirement of the EU REACH regulation is met. Meanwhile, by introducing the recycled ternary battery positive material, the adhesion of the underglaze is obviously enhanced, the synergistic effect between components is strengthened, other performances are promoted, and resource recycling and cost reduction are realized.

The invention belongs to the technical field of epoxy resin adhesives, and particularly relates to a heat-conducting COB epoxy adhesive and a preparation method thereof. The flame-retardant coating is prepared from the following components in parts by weight: 30 to 40 parts of bisphenol F862 epoxy resin, 2 to 5 parts of ethylene glycol diglycidyl ether, 40 to 60 parts of aluminum nitride, 1 to 5 parts of antimony oxide, 0.5 to 2 parts of organic silicon defoaming agent, 0.01 to 0.1 part of ultramarine blue dye, 2 to 5 parts of fumed silica, 5 to 10 parts of methyl nadic anhydride and 0.5 to 2 parts of benzyl dimethylamine. According to the heat-conducting COB epoxy adhesive and the preparation method thereof, a step-by-step stirring mode is adopted, firstly, bisphenol F862 epoxy resin and ethylene glycol diglycidyl ether are premixed, then an aluminum nitride raw material is added step by step, and different stirring speeds and time are set, so that all the raw materials are fully contacted and dispersed, and the mixing uniformity is improved; therefore, the phenomenon of material agglomeration caused by adding excessive filler at one time is avoided.

The application discloses a fireproof and explosion-proof integrated coating for plugging of a transformer substation / conversion station and a preparation method thereof, and relates to the field of coatings.The coating paint comprises the following components in parts by weight: polyurea resin: 5-8 parts; graphene tube: 0.5-3 parts; nano tin antimony oxide: 0.5-5 parts; nano silicon dioxide: 20-30 parts; vermiculite powder: 30-50 parts; water glass: 20-40 parts.The application solves the problems that current organic coatings are not fireproof and inorganic coatings are prone to cracking and not explosion-proof, adopts an organic-inorganic two-component curing system to improve the fireproof and explosion-proof functions, the nano-level particles can reduce the heat conduction of the material, improve the fireproof grade, the vermiculite powder has a cavity structure, the solid heat conduction is relatively weak, and the vermiculite powder has an energy absorption and explosion prevention effect, and the coating is used for the plugging system of the conversion station, so that the problems of great construction and maintenance difficulty and long cycle of the conversion station can be effectively solved.