432 results about "Potassium oxide" patented technology

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 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 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 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 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 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.

The invention relates to the technical field of fertilizers, and discloses a molybdenum-boron synergistic control type macroelement water-soluble fertilizer, which is prepared from the following raw materials in parts by weight: nitrate nitrogen, ammonium nitrogen, ammonium polyphosphate, potassium oxide, chelated magnesium (MgO), trace elements, a stress-resistant enhancer, a synergistic control agent and a stabilizer, the trace elements are composed of ammonium molybdate, a boric acid-glycerol compound, chelated zinc, chelated manganese (Mn-EDTA) and a chelating agent. According to the molybdenum-boron synergistic control type macroelement water-soluble fertilizer and the preparation process thereof, the ammonium molybdate and the boric acid-glycerol compound are added into the fertilizer, so that the nutrient deficiency symptom can be effectively and synergistically prevented, the fungal disease resistance can be effectively improved by adding the salicylic acid and the nano silicon dioxide, and meanwhile, the effect of preventing and treating the macroelement is achieved. By adding the chlamydomonas rubra enzymolysis extract containing natural abscisic acid, potassium silicate and polyaspartic acid, the high temperature resistance, drought resistance and heavy metal pollution resistance of the fertilizer can be effectively improved, so that the effect of the whole water-soluble fertilizer is improved, and the application range of the water-soluble fertilizer can be widened.

The invention provides a composite heat storage material and a preparation method thereof, and relates to the technical field of phase change heat storage materials. The composite heat storage material comprises the following raw materials in percentage by mole: 10-70% of sodium hydroxide, 1-5% of potassium hydroxide, 10-60% of sodium nitrate and 10-70% of sodium nitrite. The prepared composite heat storage material has the characteristics of stable thermal cycle performance, high phase change heat storage density and the like, and is suitable for the field of medium-temperature heat storage.

The invention discloses a magnesium alloy micro-arc oxidation electrolyte which comprises sodium metaaluminate, sodium hydroxide, sodium fluoroaluminate, aluminum fluoride and glycerol. The content of sodium metaaluminate is 5-25 g / L, the content of sodium hydroxide is 1-3 g / L, the content of sodium fluoroaluminate is 0.3-0.7 g / L, the content of aluminum fluoride is 0.2-0.3 g / L, and the content of glycerol is 1 g / L. The magnesium alloy micro-arc oxidation electrolyte comprises potassium metaaluminate, potassium hydroxide, potassium fluoroaluminate, aluminum fluoride and glycerol, the content of potassium metaaluminate is 10-20 g / L, the content of potassium hydroxide is 3-5 g / L, the content of potassium fluoroaluminate is 0.5-0.7 g / L, the content of aluminum fluoride is 0.3-0.5 g / L, and the content of glycerol is 1 g / L. The invention further discloses the magnesium alloy hard ceramic membrane and a preparation method thereof. According to the preparation method of the magnesium alloy hard ceramic film, the components and the microstructure of the magnesium alloy micro-arc oxidation film layer are changed, and meanwhile the hardness and the corrosion resistance of the magnesium alloy micro-arc oxidation film layer are improved.

The invention discloses a technology and device for recycling a quartz crystal resonator base, and particularly relates to the technical field of quartz crystal resonators, and the technology comprises the following steps: 1, pouring the quartz crystal resonator base and a degumming agent into a box at the same time, carrying out water bath heating for 60 minutes, dissolving a conductive adhesive, and separating a wafer from the base; 2, a degumming agent is poured into the standby box, the quartz crystal resonator base is washed five times with hot water at the temperature of 50 DEG C, and the residual degumming agent and the wafer are washed clean; step 3, pouring the washed quartz crystal resonator base into a box filled with citric acid, and heating in a water bath for 30 minutes to remove potassium silicate on the surface of the quartz crystal resonator base; according to the invention, the conductive adhesive is decomposed by using potassium hydroxide, so that the quartz crystal resonator base is separated from the wafer, the bottleneck of base reutilization in the current crystal industry is solved, and the production cost of the quartz crystal resonator is greatly reduced.

The present invention belongs to the technical field of sewage treatment, and specifically relates to a demulsifier for oily sewage treatment and its synthesis method and application. The synthesis method is as follows: tributylaminomethylsilane, potassium hydroxide, 4-chloro-1-butanol are added to the reactor, stirred at room temperature, heated, and kept warm for reaction; the above mixture is transferred to an autoclave, potassium hydroxide is added again, vacuumed, filled with nitrogen, repeated three times, then slowly heated, vacuumed, passed through propylene oxide, heated up, kept warm for reaction, when the pressure no longer changes, passed through ethylene oxide, heated up, kept warm for reaction, when the pressure no longer changes, the system is cooled to room temperature using circulating cooling water, adjusted, and a product demulsifier is obtained. The demulsifier of the present invention has the advantages of a wide source of raw materials, a simple synthesis process, and low-concentration and high-efficiency demulsification.

This invention provides a micro-arc oxidation electrolyte for magnesium alloy surface treatment and a method for preparing a micro-arc oxidation film. The micro-arc oxidation electrolyte is an aqueous solution containing sodium silicate, sodium hydroxide, potassium fluoride, and titanium boron carbon nitride conductive nanoparticles; or, an aqueous solution containing sodium silicate, potassium hydroxide, potassium fluoride, and titanium boron carbon nitride conductive nanoparticles. This invention also discloses a method for preparing a micro-arc oxidation film using the aforementioned micro-arc oxidation electrolyte for magnesium alloy surface treatment. The micro-arc oxidation electrolyte of this invention contains conductive ceramic nanoparticles—titanium boron carbon nitride conductive nanoparticles. Using these nanoparticles to perform a micro-arc oxidation reaction on the magnesium alloy surface can improve the microstructure of the micro-arc oxidation film, while simultaneously enhancing the corrosion resistance and wear resistance of the magnesium alloy after micro-arc oxidation treatment, significantly improving the surface protection capability of the magnesium alloy, and extending its service life.

The invention relates to potassium superoxide composite particles as well as a dry-method preparation process and a preparation system thereof, and belongs to the technical field of superoxide. The composite particle comprises a core and a shell layer, the core is a mixture of potassium superoxide and bentonite, the shell layer is a calcium hydroxide wrapping layer wrapping the core, and the core and the shell layer form a core-shell structure; the process comprises the steps of dry powder mixing, dry granulation and size stabilization, microwave strengthening and surface wrapping. The system comprises a raw material pretreatment device, a dry powder mixing device, a dry rolling granulation device, a microwave strengthening treatment device and a surface wrapping device. A dry granulation process is adopted, the risk that potassium superoxide and water are subjected to violent reaction is fundamentally eliminated, bentonite is used as an inert matrix, the effects of diluting and stabilizing potassium superoxide are achieved, the sensitivity of potassium superoxide to external stimulation is reduced, and the particle product is excellent in comprehensive performance.

The invention belongs to the technical field of electromagnetic detection, and particularly relates to a conductive adhesive with detection parameter convergence and a preparation method and application thereof. The conductive adhesive provided by the invention comprises a gel component and a function initiation component, the gel component comprises acrylic acid, potassium chloride, potassium hydroxide and glycerol; the functional initiation component is composed of a photoinitiator, a cross-linking agent and a thickening agent; the weight part ratio of the gel component to the function initiating component is (13-17): 1. The conductive adhesive provided by the invention has detection parameter convergence and direct-current offset voltage not greater than 50mv.

This invention relates to a gold-sand porcelain, comprising a ceramic body, characterized by further including a carved layer disposed on the surface of the ceramic body. The ceramic body comprises, by weight, the following components: 35-50 parts mineral clay, 25-35 parts hydromica, 2-6 parts kaolin, 10-20 parts quartz, 5-10 parts mica, 1-6 parts silicon dioxide, 2-5 parts iron oxide, 1-3 parts aluminum oxide, 2-6 parts calcium oxide, 2-5 parts magnesium oxide, 5-10 parts manganese oxide, 1-6 parts potassium oxide, 2-5 parts sodium oxide, and 2-6 parts zinc oxide. The carved layer is decorated according to a desired pattern. The gold-sand porcelain of this invention is characterized by being made of clay with a high gold content, being unglazed, having good breathability, good thermal shock resistance, preserving the original flavor of food, and optimizing and activating beneficial bacteria.

The invention discloses a method for reducing by-product N-methylaniline in RT base condensation liquid. According to the method, potassium hydroxide modified activated carbon is added in condensation reaction. The potassium hydroxide modified activated carbon greatly reduces the generation of a by-product N-methylaniline in a condensation reaction, reduces the absorption of carbon dioxide in air by system materials, slows down the increase of tetramethyl carbonate, prolongs the catalytic life of tetramethyl ammonium hydroxide, saves the cost of raw materials, and has a good application prospect.

The invention provides a method for reducing the diameter of a tungsten filament of tungsten filament screen cloth, which reduces the risk of injury to operators and is good in environmental friendliness. The size precision control of the tungsten filament reducing process is high; the corrosion degree of equipment is reduced, and the maintenance cost is reduced. The method is characterized in that a mixed solution containing potassium ferricyanide, potassium hydroxide and deionized water is adopted as an etching solution for reducing the tungsten filament, the mass percent of potassium ferricyanide in the etching solution is 5%-20%, and the mass percent of potassium hydroxide in the etching solution is 3%-10%.

Glass compositions include one or more of phosphorus oxide (P2O5), niobia (Nb2O5), titania (TiO2), potassium oxide (K2O) and lithium oxide (Li2O) as essential components and may optionally include barium oxide (BaO), zinc oxide (ZnO), V2O5 (vanadia), FeO (iron oxide) and other components.