547 results about "Potassium oxide" patented technology

The present invention belongs to the technical field of glass preparation, and specifically relates to an ultra-white glass and a preparation method thereof. The ultra-white glass of the present invention is composed of the following raw materials by weight: 110 parts of quartz sand, 18-20 parts of sodium carbonate, 14-16 parts of colemanite, 4.5-5.5 parts of magnesia, 2.6-2.8 parts of calcined alumina, 1.1-1.3 parts of potassium oxide, 0.8-1.0 parts of zinc oxide, 1.5-1.7 parts of phosphorus pentoxide, 0.15-0.20 parts of strontium chloride, 0.3-0.34 parts of calcium fluoride, 0.25-0.27 parts of barium nitrate, and 0.16-0.18 parts of zirconium oxide. The ultra-white glass of the present invention has a synergistic effect between the raw materials to ensure that the prepared ultra-white glass has excellent whiteness and visible light transmittance.

The invention belongs to the technical field of glass materials, and discloses thermal shock resistant transparent high borosilicate glass which comprises the following components in percentage by weight: 60-70% of silicon dioxide, 18-22% of diboron trioxide, 4-7% of aluminum oxide, 3-5% of magnesium oxide, 2-4% of alkali metal oxide, 0.5-1.5% of nano silicon nitride and 0.5-1% of nano aluminum titanate. The thermal shock temperature difference of the glass within the temperature change range of 20-200 DEG C is larger than or equal to 180 DEG C, the light transmittance within the visible light range of 400-760 nm is larger than or equal to 85%, the alkali metal oxide is composed of sodium oxide and potassium oxide, the weight ratio of the sodium oxide to the potassium oxide is 1: 1-3: 1, the average particle size of the nanometer silicon nitride is smaller than or equal to 100 nm, and the nanometer silicon nitride is evenly dispersed in the glass matrix; according to the thermal-shock-resistant transparent high borosilicate glass and the preparation method thereof, the thermal shock resistance and light transmittance of the glass are improved by optimizing the chemical components of the glass and adding the special nanoparticles in cooperation with a specific preparation process, and the thermal shock resistance of the glass is improved. The problems that existing high borosilicate glass is insufficient in thermal shock resistance and low in light transmittance in a high-temperature environment are solved.

The invention relates to the technical field of iron ore tailing resource utilization, in particular to a method for preparing iron oxide yellow by leaching iron ore tailings through an advanced oxidation technology, which comprises the following steps: adding a required amount of iron ore tailing powder into a persulfate solution, stirring to react, adding a reducing agent, boiling, filtering, adding alkali liquor to adjust the pH value, and filtering, thereby obtaining the iron oxide yellow. Pure liquid containing ferrous ions is obtained; taking part of the pure solution containing ferrous ions, and adding a potassium hydroxide solution to obtain an iron oxide yellow seed crystal solution; adding a pure solution containing ferrous ions into the iron oxide yellow seed crystal solution, adding an alkali solution to adjust the pH value, reacting, and separating and drying a product to obtain the iron oxide yellow. According to the method, the persulfate is adopted to leach iron from the iron ore tailings, and the iron oxide yellow is prepared from the leachate; harmless treatment of the iron ore tailings and value-added utilization of valuable resources are achieved, the raw material source of the iron oxide yellow industry is widened, and a wider prospect is provided for development of iron oxide yellow.

The present invention discloses a 3D three-dimensional glaze, which comprises the following components in percentage by weight: 45% - 60% of silicon dioxide, 17% - 25% of aluminum oxide, 1% - 2% of calcium oxide, 0.06% - 1.2% of magnesium oxide, 0.4% - 0.6% of sodium oxide, 1% - 3% of potassium oxide, 10% - 20% of zirconium oxide, 0.2% - 0.6% of zinc oxide, and 1% - 3% of boron oxide; the loss on ignition of the 3D three-dimensional glaze is 1.8% - 3.6%. The preparation method of the 3D three-dimensional glaze is to quantitatively weigh powders such as zirconium silicate, quartz powder, calcined alumina, potassium feldspar, ceramic frit powder, sodium carboxymethyl cellulose, and industrial tripolyphosphate, and then sequentially add the powders and emulsifying wax into water and stir to obtain a glaze slurry. After adjusting the viscosity of the glaze slurry, the 3D three-dimensional glaze is obtained by passing through an 80-mesh sieve. The present invention improves the adhesion of the 3D three-dimensional glaze on the surface of the green body, and when fired directly or in combination with other glazes, the three-dimensional glaze lines will not collapse, crack, have bubbles or breakpoints.

The invention discloses a production method of nano-silicon composite fireproof glass, which comprises the following steps: compounding amino nano-silicon dioxide with a modified zinc-aluminum flame retardant to prepare a coated silicon-based filler, and compounding the coated silicon-based filler with nickel-titanium bimetal MOF to obtain a composite silicon-based flame-retardant filler; the preparation method comprises the following steps: mixing a mixed solution of silica sol, water-soluble silicone oil, a composite silicon-based flame-retardant filler, potassium hydroxide and sodium hydroxide with ethylene glycol, filling laminated glass with the mixed solution, and sealing and curing to obtain the nano-silicon composite fireproof glass. The nano-silicon composite fireproof glass has high light transmittance and high fire resistance, the zinc-aluminum flame retardant and the nickel-titanium bimetal MOF which have flame retardance are compounded on the nano-silicon dioxide to obtain a composite silicon-based flame-retardant filler, and the zinc-aluminum flame retardant and the nickel-titanium bimetal MOF generate a synergistic effect through compounding of a multi-layer core-shell structure, so that the flame-retardant performance of the nano-silicon composite fireproof glass is improved, and the flame-retardant performance of the nano-silicon composite fireproof glass is improved. The flame-retardant and fire-resistant performance of the composite silicon-based flame-retardant filler is improved, and the influence of the flame retardant on the light transmission of the nano-silicon composite fireproof glass is reduced.

The present invention relates to the technical field of cutting fluids, and in particular to a water-based high-lubricity cutting fluid and a preparation method thereof, comprising triethanolamine, an oily corrosion inhibitor, a lubricating additive, benzotriazole, a surfactant, a potassium hydroxide solution, a pH regulator and deionized water. The water-based high-lubricity cutting fluid in the present invention is compounded by lubricating additives, triethanolamine, an oily corrosion inhibitor, benzotriazole, a surfactant and the like, wherein the sulfide fatty acid ester embedded in the lubricating additive is thrown out from the pores under the action of centrifugal force when subjected to a high centrifugal speed, and adheres to the metal surface to form a dense sulfide film, which plays a lubricating role, can effectively reduce shear stress, reduce friction and power consumption, reduce the temperature of the friction part between the tool and the workpiece and the tool wear, improve the cutting performance of the workpiece material, and improve the lubrication performance of the cutting fluid, so that it has the characteristics of small usage and high cutting quality.

The invention discloses a preparation method of fireproof temperature-resistant special tempered glass, which comprises the following steps: pretreating substrate glass by using a mixed solution of cesium hydroxide and potassium hydroxide, with the cesium hydroxide content of 0.2-15 wt% and the potassium hydroxide content of 0.5-10 wt%; substrate glass is placed in the mixed solution of cesium hydroxide and potassium hydroxide, the mixed solution is placed in a micro-high-pressure environment for 0.5-1 hour, and the micro-high pressure is 10-15 MPa; basic glass is pretreated through a cesium hydroxide and potassium hydroxide mixed solution, under the synergistic effect of cesium hydroxide and potassium hydroxide, a hydroxyl layer on the surface of the glass is more easily removed, a silicon-oxygen network structure is damaged, a silicon-oxygen network is broken, more new diffusion ion channels are formed, and the ion exchange speed is increased; pretreatment is carried out in a micro-high-pressure environment, so that the substrate glass pretreatment speed can be increased, and the pretreatment time is remarkably shortened.

The invention discloses high-strength high-temperature-resistant fireproof industrial glass and a preparation method thereof, and relates to the technical field of glass manufacturing. The industrial glass is prepared from the following raw materials: silicon dioxide, boric oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, a composite reinforcing component and a clarifying agent, the composite reinforcing component is prepared from hafnium oxide, gadolinium oxide and zinc oxide; the clarifying agent is obtained by mixing cerium dioxide and tin oxide. The preparation method of the industrial glass comprises the following steps: preparing functional components, melting glass, forming a glass substrate, and preparing the industrial glass. The prepared industrial glass is high in strength, good in high-temperature stability and excellent in fireproof performance.

The invention relates to the technical field of electronic glass fiber materials, and particularly discloses a corrosion-resistant low-dielectric glass fiber and a preparation process thereof. A preparation process of corrosion-resistant low-dielectric glass fibers comprises the following steps: S1, uniformly mixing glass fiber raw materials, melting, clarifying, homogenizing, cooling, and carrying out wiredrawing treatment to obtain glass fiber precursors; and S2, sequentially carrying out plasma treatment and impregnating compound treatment on the glass fiber precursor, drying and curing to obtain the corrosion-resistant low-dielectric glass fiber, silicon dioxide, aluminum oxide, magnesium oxide, boric oxide, calcium fluoride, tin oxide, sodium oxide, potassium oxide and rare earth oxide are used as glass fiber raw materials, and the rare earth oxide is a mixture of gadolinium oxide, cerium oxide and samarium oxide. The obtained glass fiber has excellent low dielectric property and corrosion resistance, and has a wide market prospect.

The invention discloses a glass etching device for laser induction and a fluoride-free etching method, and belongs to the technical field of glass etching.The etching device comprises an etching tank and an oil bath heating device, the etching speed can be increased by heating alkaline fluoride-free etching liquid, and the etching efficiency is improved. A composite stirring system of a magnetic stirrer and a stirring paddle can enable the fluoride-free etching liquid to circularly flow, so that the etching uniformity is improved, and the etching reaction is more favorably and stably carried out; the fluoride-free etching method adopts fluoride-free etching liquid, does not contain hydrofluoric acid, is safe and environment-friendly, and can avoid deterioration of through hole characteristics. Under the action of the fluorocarbon surfactant, the etching liquid has excellent wettability, and sodium hydroxide and potassium hydroxide in the etching liquid can perform high-selectivity etching on the glass after laser induction; the glass subjected to fluoride-free etching is high in surface smoothness and higher in through hole roundness, the surface and the inner wall of the through hole are smooth, the roughness of the inner wall of the through hole is smaller than 1 micron, the taper of the through hole is smaller, and a good etching effect is achieved.

This invention relates to a method of reducing abnormal combustion events in a hydrogen fueled internal combustion engine (HICE) during operation of the engine. The method includes the steps of: a) providing to the HICE a lubricating oil composition including or resulting from the admixing of: i) a base oil having a KV100 of less than or equal to 12 cSt and included at greater than 50 wt. % of the composition and comprising a Group I base oil, a Group II base oil, a Group III base oil, a Group IV base oil, or combinations thereof; ii) an overbased metal-containing detergent comprising an overbased metal salicylate detergent, an overbased metal phenate detergent, or combinations thereof with a Total Base Number (KOH / g) greater than or equal to 9 and less than or equal to 500 and included at treat level to deliver between 100 to 5000 ppm by weight of total metal and between 0.15 wt. % to 8.0 wt. % of total soap to the composition; and iii) the lubricating oil composition having a total sulfated ash of less than or equal to 2.0 wt. %, a total phosphorous level of less than or equal to 0.120 wt. %, and a SAE viscosity grade of 25W-X, 20W-X, 15W-X, 10W-X, 5W-X or 0W-X, where X represents any one of 8, 12, 16, 20, 30, 40, 50 or 60; b) providing a fuel comprising hydrogen to the HICE; and c) combusting the fuel in the HICE. Also provided are a lubricating oil composition and a concentrate for use in a HICE to reduce the propensity for abnormal combustion events.

The invention provides a method for synthesizing an MSE molecular sieve, and belongs to the technical field of molecular sieves. The invention uses tetramethylammonium hydroxide and tetrapropylammonium hydroxide as mixed template agents, stirs and mixes a silicon source, an aluminum source, sodium oxide, potassium oxide, a template agent and water, and then directly crystallizes, and then washes, dries and calcines to synthesize an MSE molecular sieve. The method for synthesizing an MSE molecular sieve provided by the invention does not require the addition of external crystal seeds, has easily available raw materials, is low in cost, and has simple steps, thus laying a foundation for further industrial production.

The invention discloses a toughened glass ceramic and a preparation method thereof, and relates to the technical field of glass ceramics, and the toughened glass ceramic comprises the following components in percentage by weight: 64 to 68 weight percent of silicon dioxide, 22.67 to 26.5 weight percent of lithium oxide, 0.9 to 1.2 weight percent of antibacterial agent, 0.8 to 1.1 weight percent of modified mica powder, 1.98 to 2 weight percent of aluminum oxide, 1.78 to 1.8 weight percent of potassium oxide, 1.68 to 1.7 weight percent of zirconium dioxide, 1.19 to 1.2 weight percent of phosphorus pentoxide and 1 to 3 weight percent of calcium fluoride. According to the toughened glass ceramic and the preparation method thereof, a multi-scale anti-cracking network is formed through macroscopic crack deflection of mica and nanoscale phase change toughening of zirconium oxide, the fracture toughness is remarkably improved, zirconium oxide agglomeration can be reduced through interface optimization of modified mica powder, zirconium oxide is dispersed more uniformly, and the phase change potential is further exerted; due to high-temperature stability of aluminum oxide, antibacterial agent particles can be wrapped, and excessive volatilization or aggregation of the antibacterial agent particles in the sintering process is prevented; aluminum oxide is used as a'protective shell 'to delay the Cu < 2 + > release rate and realize long-acting antibiosis.

The invention provides a coal-based solid waste foamed cement material for filling a coal mine tunnel and a preparation method of the coal-based solid waste foamed cement material. The coal-based solid waste foamed cement material comprises 10-30 parts of coal gasification coarse slag micro powder, 0-30 parts of first-grade fly ash, 70-90 parts of cement, 0.3-0.8 part of a foam stabilizer and 0.1-0.5 part of an additive, the coal-based solid waste foamed cement material is further doped with foam, the mixing amount of the foam is 2-5 times of the volume of the cement slurry, the coal gasification coarse slag micro powder is coal water slurry furnace gasification coarse slag, and the coal gasification coarse slag micro powder is prepared from, by mass, 40% of silicon dioxide, 19% of aluminum oxide, 15% of ferric oxide, 16% of calcium oxide, 3% of sulfur trioxide, 3% of sodium oxide, 1% of magnesium oxide and 0.5% of titanium oxide. And 0.5% of potassium oxide. According to the invention, a physical foaming method is utilized, coal-based solid waste is used as a raw material to replace part of cement, and the foamed cement material with light weight and high strength is prepared, so that the foamed cement material meets the use requirements of underground roadway filling.

The invention provides a few-layer V2AlC MAX phase material and also provides a preparation method and application of the material, and the preparation method comprises the following steps: grinding and uniformly mixing vanadium powder, aluminum powder and graphite powder, and tabletting the mixed powder to obtain a solid A; roasting and grinding the solid A to obtain powder B; mixing sodium hydroxide, potassium hydroxide and the powder B, and performing high-temperature treatment to obtain powder C; the powder C is washed, subjected to suction filtration and dried and then mixed with isopropanol, nitrogen is introduced for heating treatment, and turbid liquid is obtained; and carrying out ultrasonic treatment on the turbid liquid, standing, centrifuging supernatant, washing and drying to obtain the few-layer V2AlC MAX phase material. The few-layer V2AlC MAX phase material with high catalytic activity is synthesized by using the molten alkali and the intercalator, the conversion rate of the few-layer V2AlC MAX phase material used for solvent-free catalysis of toluene reaches 20.83%, the selectivity of benzoic acid reaches 70.02%, and chlorine is not introduced into the obtained benzoic acid, so that the few-layer V2AlC MAX phase material can be applied to food and medicines.

The invention relates to a method for separating sodium and potassium from mixed sulfate containing sodium and potassium, which comprises the following steps: mixing the mixed sulfate containing sodium and potassium, a calcium-containing compound and water, dissolving and reacting to obtain potassium-removed mother liquor and double salt precipitate; performing first crystallization on the potassium-removed mother liquor to obtain a sodium sulfate product; mixing the double salt precipitate with water for elution treatment to obtain a potassium sulfate solution; performing secondary crystallization on the potassium sulfate solution to obtain a potassium sulfate product; according to the method, efficient separation of sodium and potassium in the mixed sulfate containing sodium and potassium is achieved, the purity of the obtained sodium sulfate product is preferably as high as 99.0% or above, the potassium content in potassium sulfate is preferably as high as 54.2 wt% or above based on the mass content of potassium oxide, the whole technological process is short, potassium chloride does not need to be added, the separation cost is low, waste gas, waste liquid and solid waste are not generated, and the method is suitable for industrial production. And green resource utilization of the mixed sulfate containing sodium and potassium is realized.

The present disclosure herein discloses a skeleton supported catalyst and a method for preparing allyl alcohol polyoxyethylene ether by using the same. The skeleton supported catalyst is a catalyst loaded with barium oxide, potassium oxide, yttrium oxide within a copper skeleton. A method comprising: putting the skeleton supported catalyst into a reaction vessel, and after adding nitrogen to the reaction vessel, adding dried and dehydrated allyl alcohol or the allyl alcohol polyoxyethylene ether with low molecular weight to the reaction vessel, raising the temperature, and continuously introducing dried and dehydrated ethylene oxide for reaction; after the reaction being completed, cooling down, and filtering and discharging to obtain after the reaction being completed, cooling down, and filtering and discharging to obtain a finished product of the allyl alcohol polyoxyethylene ether. The allyl alcohol polyoxyethylene ether product prepared by the skeleton supported catalyst of the present disclosure has excellent product performance.

The invention discloses an oxidation-resistant monomer casting nylon material and a preparation method thereof, and relates to the field of material preparation, and the monomer casting nylon material is applied to a high-temperature and oxygen-enriched environment and comprises the following components in parts by mass: 100 parts of caprolactam; 0.1-0.3 part of a catalyst which is one of sodium hydroxide, potassium hydroxide or lithium hydroxide; 0.5 to 1.5 parts of an activating agent, wherein the activating agent is N-acetyl caprolactam; 0.7 to 3 parts of a main antioxidant, wherein the main antioxidant comprises a hindered phenol antioxidant and a thioester antioxidant; 0.1-0.5 part of an auxiliary antioxidant, which is a metal deactivator; 1-3 parts of an inorganic filler which is modified montmorillonite; and 0.5-2 parts of a hydrophobic agent which is a silane coupling agent. By constructing a composite anti-oxidation system, multi-level synergistic protection can be formed for three key oxidation stages of free radical initiation, peroxide accumulation and metal catalysis, and a full path of an oxidation chain reaction is covered from a molecular level, so that the aging process of the material is remarkably delayed, and the service life of the material is prolonged. And high oxygen resistance and relatively long service life are provided for nylon application under severe working conditions.

The invention discloses a micro-arc oxidation coating for an artificial hip joint Ti6Al4V alloy and a preparation method of the micro-arc oxidation coating. The preparation method comprises the following steps that S1, pretreatment is conducted; s2, preparing a micro-arc oxidation electrolyte; s3, preparing a micro-arc oxidation coating; s4, cleaning and drying treatment; a preparation method of the electrolyte comprises the steps that 6 g of sodium metaaluminate solid powder, 4 g of potassium hydroxide solid powder, 2 g of sodium hexametaphosphate solid powder, 4 g of sodium silicate solid powder and 4 g of yttrium oxide nanoparticles are sequentially weighed and added into a beaker, then 980 mL of ultrapure water at the temperature of 60 DEG C is added into the beaker, and stirring is conducted for 2 min while the temperature is kept; the yttrium oxide particles are approximately spherical or ellipsoidal, the particle size range is 20-50 nm, and the purity is 99.99%. The yttrium oxide nanoparticles are introduced into the electrolyte, the micro-arc oxidation coating containing the yttrium oxide is prepared on the surface of the Ti6Al4V alloy, and compared with a traditional micro-arc oxidation coating, the surface porosity of the micro-arc oxidation coating containing the yttrium oxide is remarkably reduced, and the compactness is remarkably improved.

The invention belongs to the technical field of glass materials, and particularly relates to black high-hardness heat-resistant microcrystalline glass ware and a preparation method thereof. Silicon dioxide, sodium oxide, aluminum oxide, potassium oxide, boric oxide, magnesium oxide, calcium oxide, zinc oxide, sodium fluosilicate, iron oxide, manganese oxide, fluorite, lithium oxide, metal manganese coated with silicon dioxide and schorlite are used as raw materials, and the black high-hardness heat-resistant microcrystalline glass ware is prepared through the processes of high-temperature melting and mixing, compression molding, annealing and tempering. The black high-hardness heat-resistant microcrystalline glass ware is excellent in performance, high in hardness and good in heat resistance, and has potential market value.

The invention discloses a preparation process of carboxylated shell-based activated carbon for organic matter adsorption, and particularly relates to the technical field of adsorption materials, and the preparation process comprises the following steps: mixing coconut shell powder and walnut shell powder, crushing, and loading potassium hydroxide in stages in a gradient manner; carrying out two-stage microwave activation in an inert atmosphere, namely low-temperature pre-activation in the first stage and high-temperature activation in the second stage, and introducing carbon dioxide; the activated product, phosphoric acid, a laccase-peroxidase complex enzyme preparation and a buffer solution are subjected to ultrasonic synergistic modification, and then a weak acid reaction is maintained through dynamic pH regulation and control; and finally, performing graded washing and gradient drying to obtain a finished product. According to the method, high-density carboxyl grafting and graded pore construction are synchronously realized under mild conditions through a synergistic effect of directional catalysis of biological enzyme and dynamic regulation of microwave, so that the problems of structural damage caused by strong acid corrosion, pore imbalance caused by fixed parameters and stability reduction caused by insufficient post-treatment in a traditional process are solved; the adsorption performance and the regeneration cycle performance of the material are also obviously improved.

The invention relates to the technical field of catalysts, in particular to an iron-based catalyst for synthesizing low-carbon olefins and a preparation method and application thereof.The iron-based catalyst is prepared from, by mass, 50-80 parts of an active component, 5-20 parts of an auxiliary A and 2-10 parts of an auxiliary B. The active component is iron or iron oxide; the aid A is selected from at least one of transition metal manganese or manganese oxide, copper or copper oxide and zinc or zinc oxide, and the aid B is potassium or potassium oxide; the invention provides an iron-based catalyst for synthesizing low-carbon olefins, the average pore size of the iron-based catalyst is 2-20nm, in addition, the invention further provides a preparation method of the iron-based catalyst for synthesizing the low-carbon olefins and application of the iron-based catalyst for synthesizing the low-carbon olefins, and the iron-based catalyst for synthesizing the low-carbon olefins, the preparation method and the application have the advantages that the average pore size of the iron-based catalyst is 2-20nm; the problems that an iron-based catalyst is unreasonable in pore structure, wide in pore size distribution and low in catalyst activity and selectivity are solved.

The invention relates to the technical field of water-soluble fertilizers, in particular to a macroelement water-soluble fertilizer based on livestock and poultry breeding wastewater and a preparation method thereof, and the macroelement water-soluble fertilizer comprises the following raw materials in parts by weight: 50-60 parts of a breeding waste liquid concentrated base solution, 17-20 parts of amido nitrogen, 20-25 parts of potassium polymetaphosphate, 17-20 parts of phosphorus element, 17-20 parts of potassium oxide, 0.5-1 part of trace element boron, 0.5-1 part of trace element copper and 60-65 parts of solvent water. According to the macroelement water-soluble fertilizer disclosed by the invention, a base solution obtained by concentrating culture waste liquid is used as a matrix, the raw materials are coordinated, and the filling agent doped with the modified carbon nanotubes and the modified functional agent are added as blenders, so that the macroelement water-soluble fertilizer is prepared through the synergistic effect of the filling agent and the modified functional agent; the obtained water-soluble fertilizer product has obvious improvement effects on cotton crop disease resistance, seed cotton yield and fiber quality.

The invention provides a production method of ethyl 3-ethoxypropionate, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: adding ethanol and a catalyst into a reactor, dropwise adding ethyl acrylate, stirring for reaction, filtering, and recovering the catalyst to obtain ethyl 3-ethoxypropionate; the catalyst is a modified UiO-66-NH2 / layered metal oxide catalyst loaded with K2O (potassium oxide). The synthesis of the ethyl 3-ethoxypropionate is carried out under the catalytic action of the catalyst, the preparation method is simple, the conditions are mild, the product yield is high, the catalyst can be repeatedly utilized for multiple times, the method is green and environment-friendly, the cost is relatively low, and the method has a wide application prospect.

The invention relates to a controllable electrochemical etching strategy based on solubility product difference, in particular to a preparation method of a barium sulfate modified NiCo-LDH aqueous alkaline zinc battery positive electrode material, which comprises the following steps: firstly, dissolving 1, 4-phthalic acid and sodium hydroxide in a molar ratio of 1: 2 in water to obtain a solution A; dissolving barium nitrate pentahydrate, cobalt nitrate hexahydrate, nickel nitrate hexahydrate and ammonium fluoride in water according to a molar ratio of (0-1.5): 1: 4: 10 to obtain a solution B; the preparation method comprises the following steps: fully mixing the solutions, transferring the mixed solution into an autoclave containing foamed nickel (NF), and carrying out solvothermal reaction to obtain a tri-metal Co / Ni / Ba-MOF precursor (CNBx-BDC); cNBx-BDC is used as a working electrode, a platinum wire is used as a counter electrode, Hg / HgO is used as a reference electrode, 5-6M potassium hydroxide and 0.05-0.06 M sodium sulfate are used as electrolyte, a three-electrode system and a cyclic voltammetry method are adopted, electrochemical etching is carried out at the scanning rate of 20-30mV s <-1 > under the voltage range of 0-0.5 V, and the barium sulfate nanodot functionalized Co / Ni / Ba-LDH electrode (BS (at) CN-LDH) is obtained after six times of circulation. The unique porous structure can provide more electrochemical active sites and enhance electrolyte infiltration capacity, and the constructed heterostructure forms a strong built-in electric field, accelerates charge transfer, reduces ion diffusion energy barriers and improves energy utilization efficiency.

The invention relates to silver-shielding glass powder, a glass powder composition and automobile glass silver-shielding ink. The silver-covering glass powder comprises the following components in percentage by mass: 20-50% of silicon dioxide, 0-20% of bismuth oxide, 10-30% of zinc oxide, 5-20% of boric oxide, 4-12% of sodium oxide, 4-10% of potassium oxide, 2-5% of lithium oxide, 0-5% of aluminum oxide, 0-5% of calcium oxide, 0-5% of magnesium oxide, 0-3% of phosphorus pentoxide, 0-12% of titanium dioxide, 0-2% of antimony trioxide and 0-2% of calcium fluoride. The silver-covering glass powder further comprises sulfide and / or elemental sulfur, and the sulfide and / or elemental sulfur account for 6-9% of the total mass of the components. Compared with the prior art, the silver-shielding ink for the automobile glass, which is excellent in comprehensive performance, is finally prepared by introducing elemental sulfur or sulfide into a silver-shielding glass system and controlling a melting process.

The invention discloses a flame-retardant rubber hose for an automobile and a preparation method of the flame-retardant rubber hose, and relates to the technical field of automobile parts. The silane coupling agent is utilized to modify mica, chemical and physical adsorption between mica and active groups on silane molecules is promoted under the assistance of a ball milling process, and cyclotriphosphazene derivatives are subjected to a grafting reaction on the surface of mica through the silane coupling agent, so that the mechanical property of rubber is indirectly enhanced; the preparation method comprises the following steps: mixing a matrix with silicon rubber, potassium oxide and polydiphenyl siloxane to obtain a flame retardant, blending the flame retardant with silicon rubber, potassium oxide and polydiphenyl siloxane, in a high-temperature combustion state, enabling the matrix to form a hard ceramic phase so as to enhance the flame retardance and high temperature resistance, and finally, carrying out irradiation treatment under a vacuum condition so as to obtain the flame-retardant composite material. Hydrogen in phenyl and methyl equilateral groups in the matrix is extracted to generate benzene, so that the high temperature resistance and the mechanical property of the matrix are enhanced.

The invention relates to a method for simultaneously detecting fluorine and chlorine contents in lead concentrate by an ion selective electrode method, and belongs to the technical field of new material detection, and the method specifically comprises the following steps: (1) preparing a sample into a to-be-detected solution; (2) preparing a fluorine ion electrode standard solution and a chloride ion electrode standard solution; (3) calibrating a fluorine ion standard solution and a chloride ion standard solution; and (4) sample determination and data processing. According to the combined measurement method provided by the invention, through a layered coverage method, optimization of the ratio of potassium hydroxide to potassium nitrate and gradient temperature rise, on the premise of ensuring data quality, an accurate result is conveniently obtained; compared with a fluorine or chlorine testing method commonly used in the market, the method is short in time consumption, simple in equipment and accurate in data; in addition, the combined detection method provided by the invention breaks through the pH limit of traditional single ion detection, and provides a reliable solution for synchronous determination of fluorine and chlorine in a complex matrix sample.

This invention relates to a method of reducing abnormal combustion events in a hydrogen fueled internal combustion engine (HICE) during operation of the engine. The method includes the steps of: a) providing to the HICE a lubricating oil composition including or resulting from the admixing of: i) a base oil having a KV100 of less than or equal to 12 cSt and included at greater than 50 wt.% of the composition and comprising a Group I base oil, a Group II base oil, a Group III base oil, a Group IV base oil, or combinations thereof; ii) an overbased magnesium containing detergent comprising an overbased magnesium salicylate, an overbased magnesium sulfonate, an overbased magnesium phenate, or combinations thereof with a Total Base Number (KOH / g) greater than or equal to 9 and less than or equal to 500 and included at treat level to deliver between 100 to 5000 ppm by weight of total magnesium and between 0.15 wt. % to 8.0 wt. % of total soap to the composition; iii) at least one overbased calcium containing detergent with a Total Base Number (KOH / g) greater than or equal to 9 and less than or equal to 500 and included at a treat level to deliver greater than 100 ppm by weight of total calcium to the composition; and iv) the lubricating oil composition having a total sulfated ash of less than or equal to 2.0 wt.%, a total phosphorous level of less than or equal to 0.120 wt.%, and a SAE viscosity grade of 25W-X, 20W-X, 15W-X, 10W-X, 5W-X or 0W-X, where X represents any one of 8, 12, 16, 20, 30, 40, 50 or 60; b) providing a fuel comprising hydrogen to the HICE; and c) combusting the fuel in the HICE. Also provided are a lubricating oil composition and a concentrate for use in a HICE to reduce the propensity for abnormal combustion events.

The invention relates to the field of nuclear power operation, in particular to a control method for quantitative ammonia potassium saturation of cation resin of a primary loop purification system of a nuclear power plant. The method comprises the following steps: before starting ammonia-potassium saturation, calculating the total amount of ammonia absorbed by resin, the total amount of potassium absorbed by resin and the ideal concentration of a potassium hydroxide solution by utilizing the total exchange amount of nuclear-grade cation resins in a series I and a series II and the ammonia and potassium selectivity coefficients of the nuclear-grade cation resins; the flow of the first series and the flow of the second series are adjusted, the theoretical ammonia adding amount of the first loop under different flows of the second series is calculated, and continuous ammonia adding is conducted on the first loop with the theoretical ammonia adding amount as the target; when the series of diamino potassium is saturated, sampling and analyzing the total alkali metal content and the ammonia content from the outlets of the primary loop and the series II, and calculating and adjusting the adding amount and the frequency of the potassium hydroxide solution to ensure that the total alkali metal concentration of the main loop is in the area A and does not deviate; after the potassium ammonia saturation of the series II is finished, stopping the operation of the series I, calculating the required ammonia adding amount under the normal working condition, timely adjusting the continuous ammonia adding amount of the loop I, quitting the series I, and keeping the operation of the series II. According to the invention, smooth implementation of saturation of series of diamino potassium and safety of primary loop water quality are ensured.