51 results about "Barium nitrate" 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 relates to a glass bead, in particular to a high-refractive-index large-particle-size glass bead for road marking and a spheroidizing forming preparation method of the high-refractive-index large-particle-size glass bead. The material comprises the following components in parts by weight: 30 to 40 parts of titanium dioxide, 30 to 40 parts of silicon dioxide, 10 to 15 parts of barium nitrate, 10 to 15 parts of zirconium nitrate, 5 to 7 parts of zinc oxide, 3 to 5 parts of boric acid, 3 to 5 parts of calcium fluoride, 5 to 110 parts of Nb2O5 and 5 to 15 parts of a La2O3-ZrO2 compound. According to the invention, calcination is carried out at 900 DEG C for 12 hours, which is helpful for improving the thermal stability and mechanical strength of the glass beads, so that the glass beads can be used for a long time in a severe outdoor environment and are not easy to damage. And at the high temperature of 1300 DEG C and the spraying speed of 75 m / s, through precise intersection of the two nozzles in the combustion chamber, precise control over the melting and forming process of the glass beads is ensured, and therefore the high-quality high-refractive-index glass beads are obtained. The Nb2O5 and La2O3-ZrO2 compound is added, so that the refractive index of the glass beads is improved, and a relatively high yield is maintained.

The invention provides a preparation method of an ErBCO superconducting target, and belongs to the technical field of oxide target materials.The preparation method comprises the steps that firstly, erbium nitrate, barium nitrate, copper nitrate, high-purity water, a dispersing agent and a binding agent are sequentially mixed, and then mixed powder is obtained through segmented ball milling and spray granulation; then the ErBCO superconducting target material is prepared through the method that the mixed powder is sequentially subjected to calcination, cold sintering and drying treatment, the effect of reducing the cost while the performance such as the density of the target material is improved is achieved through the cold sintering process, and the ErBCO superconducting target material has the advantages that the ceramic sintering temperature is remarkably reduced, and the sintering time is remarkably shortened.

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 discloses a novel antibacterial environment-friendly ceramic and a preparation method thereof, and belongs to the technical field of ceramics, the method comprises the following steps: dissolving aluminum chloride, barium nitrate and ferric nitrate in a solvent, and stirring and mixing to prepare a first mixed solution; adding kaolin and carbon powder into the first mixed solution, and stirring and mixing to obtain a second mixed solution; boron, carbon, aluminum, boron oxide, zirconium dioxide and barium carbonate are dispersed in a dispersing agent to be mixed to prepare a third mixed solution; boron oxide, aluminum hydroxide, titanium boride, zirconium, silicon, sodium zirconate, sodium carbonate, calcium tungstate and zirconium dioxide are added into the second mixed solution to be stirred and mixed, and mixed slurry is prepared; the mixed slurry is used for preparing a blank body, the blank body is placed in a sintering furnace to be sintered in different temperature stages and sintering environments, and the prepared ceramic has high strength, is not prone to cracks in the environment where the temperature changes rapidly and is good in corrosion resistance.

The invention provides a preparation method for synthesizing lithium sulfide from industrial-grade lithium hydroxide and sodium sulfide, a preparation method for a solid electrolyte and a solid-state battery, and the preparation method for synthesizing lithium sulfide from industrial-grade lithium hydroxide and sodium sulfide comprises the following steps: dissolving an industrial-grade lithium hydroxide raw material, and sequentially carrying out oxidation, filtration, washing and drying to obtain lithium sulfide; sodium sulfide and a flocculating agent are added for precipitation and filtration, then sodium carbonate and barium nitrate are sequentially added for impurity removal and filtration, and a lithium hydroxide purified solution is obtained; reacting the sodium sulfide solid with dilute sulphuric acid to obtain hydrogen sulfide gas; hydrogen sulfide gas is introduced into the lithium hydroxide purification liquid for a reaction, and lithium sulfide slurry is obtained; evaporating, concentrating and crystallizing the lithium sulfide slurry, and centrifugally separating; and carrying out vacuum calcination on the crystal, and crushing to obtain lithium sulfide powder. Through oxidative conversion, chemical precipitation and crystallization purification, efficient and deep removal of impurities is realized, the problems that raw material components are complex and difficult to separate are solved, and the purity of lithium sulfide is improved.

The invention relates to a preparation method of a battery and the battery. The preparation method of the battery comprises the following steps: preparing a battery cathode based on barium nitrate, cobalt nitrate hexahydrate, ferric nitrate nonahydrate, zirconyl nitrate and yttrium nitrate hexahydrate; preparing a battery electrolyte based on barium nitrate, zirconyl nitrate, cerium nitrate hexahydrate, yttrium nitrate hexahydrate and ytterbium nitrate hexahydrate; preparing a battery positive electrode based on aluminum powder, iron powder, cobalt powder, nickel powder, chromium powder and molybdenum powder; a battery is prepared based on a battery cathode, a battery cathode, and a battery electrolyte.

The application discloses a method for preparing a monatomic mercury catalyst by using a waste mercury catalyst as a raw material and a product thereof. The method comprises the following steps: mixing the waste mercury catalyst with a mercury chloride gasification aid, and then heating to 300-350 DEG C in an inert gas flow to perform catalytic gasification; and using a defective carbon carrier to adsorb and capture mercury chloride in tail gas of the catalytic gasification to obtain the monatomic mercury catalyst. The mercury chloride gasification aid comprises at least one of potassium nitrate, sodium nitrate, barium nitrate, zinc nitrate and cerium nitrate. The application adopts the method of catalytic gasification-defective capture to obtain the high-performance monatomic mercury catalyst in one step by using the waste mercury catalyst as a raw material. Meanwhile, the carbon carrier after catalytic mercury extraction is crushed, bonded and formed into a shape, and catalytic carbonization is performed to obtain a chlorinated defective carbon carrier, which is used as a carrier of the monatomic mercury catalyst again, so that the waste mercury catalyst is fully recycled and utilized.

The present invention relates to glass microbeads, and in particular to a high-refractive-index, large-particle-size glass microbead for road marking and a spheroidization and molding preparation method thereof. The glass microbeads comprise, by weight, 30 to 40 parts of titanium dioxide, 30 to 40 parts of silicon dioxide, 10 to 15 parts of barium nitrate, 10 to 15 parts of zirconium nitrate, 5 to 7 parts of zinc oxide, 3 to 5 parts of boric acid, 3 to 5 parts of calcium fluoride, 5 to 110 parts of Nb2O5, and 5 to 15 parts of La2O3-ZrO2 compound. In the present invention, calcination at 900°C for 12 hours helps to improve the thermal stability and mechanical strength of the glass microbeads, enabling them to be used for a long time in harsh outdoor environments without being easily damaged. At a high temperature of 1300°C and a spray velocity of 75 m / s, the precise intersection of two nozzles in the combustion chamber ensures precise control of the melting and molding processes of the glass microbeads, thereby obtaining high-quality, high-refractive-index glass microbeads. The addition of Nb2O5 and La2O3‑ZrO2 complexes not only improves the refractive index of the glass microspheres but also maintains a high yield.

The invention discloses a display shell capable of generating a yellow smoke effect, which consists of a spherical shell body filled with explosives and effect powder and a paper cup seat loaded with propellant powder, and further comprises an ignition lead and a blasting fuse. According to the display shell provided by the invention, through the three-section synergistic effect of the effect powder, the explosive and the propellant powder, stable generation and high-altitude release of yellow smoke are realized. The effect drug takes 3, 6-diamino-10-methyl acridine hydrochloride as a color development core and is supplemented by a barium nitrate / strontium carbonate composite oxidant system; the explosive triggers the effect explosive to release through a high-heat reaction of aluminum powder-barium nitrate; the propellant ensures that the display shell is accurately lifted off through high-energy output of potassium perchlorate-magnesium aluminum alloy. The three formulas form synergy in three aspects of energy transfer, oxidant complementation and combustion regulation, so that the yellow smoke has the advantages of stable color development, uniform diffusion and long duration.

The invention provides a smoke agent for a starting cartridge. The smoke agent comprises 40 wt% of lead tetraoxide; 10 wt%-30 wt% of a strong oxidant; 25 wt%-35 wt% of silicon carbon powder; 8 wt%-10 wt% of a combustion agent; 0.5 wt% to 1.5 wt% of an adhesive; the strong oxidant is ammonium nitrate or barium nitrate. Compared with the prior art, the smoke agent for the starting cartridge has the advantages that specific components with specific contents are adopted, overall good interaction is achieved, on the basis that the obtained smoke agent for the starting cartridge meets various use requirements, potassium chlorate which is prone to being affected with damp is prevented from being used, the free-running property is good, and meanwhile the situation that the explosive loading amount of the smoke agent is not uniform is avoided.

Provided is a separator used for a secondary battery. The separator may comprises a complex-containing layer which is provided on a surface in contact with a negative electrode of the secondary battery and which contains an electrolyte complex. The electrolyte complex may contain a nitrate and a coordination substance. The nitrate may include at least one selected from lithium nitrate, potassium nitrate, cesium nitrate, sodium nitrate, silver nitrate, calcium nitrate, zinc nitrate, copper nitrate, magnesium nitrate, indium nitrate, aluminum nitrate, ammonium nitrate, barium nitrate, and iron nitrate.

The application belongs to the field of composite materials, and provides a preparation method of a composite material of barium borate as a skeleton loaded with glycerol monostearate, GMS is dispersed in deionized water, heated and stirred, and then cooled to room temperature to form a suspension, barium nitrate and sodium tetraborate are dispersed in deionized water and stirred by a magnetic stirrer; the GMS suspension is added dropwise into the sodium tetraborate solution and stirred uniformly, the barium nitrate solution and the PEG-200 solution are added dropwise into the GMS and sodium tetraborate mixed solution in sequence and stirred uniformly, and then poured into a hydrothermal kettle for hydrothermal treatment; after hydrothermal treatment, the product is naturally cooled to room temperature, centrifuged or suction filtered, and the precipitate is washed with deionized water to obtain a BaB / GMS / PEG composite material. The product has excellent tribological properties. The preparation method of the composite material of barium borate as a skeleton loaded with glycerol monostearate has the advantages of simple synthesis process and green and environmentally-friendly reaction.

The present application relates to a graphite furnace atomizer sulfate shielding pre-device, which comprises a sample inlet tube connected with a sample peristaltic pump at one end for inputting sample, and in parallel with a dilute nitric acid inlet tube and a barium nitrate inlet tube at the other end, respectively supplied by the peristaltic pump. After parallel convergence, the liquid enters a first cyclone mixing chamber to complete the sample mixing and acidification. The liquid enters a second cyclone mixing chamber through the bottom communication pipe and reacts with barium nitrate to generate barium sulfate precipitate. The mixed liquid flows into the collection area through the inverted umbrella-shaped distributor and the rotary reaction generator, and when flowing through the narrow pipeline, the photoelectric sensor monitors the content of the precipitate. After the liquid enters the precipitation area, it is discharged through the discharge valve plate. The three-way electromagnetic valve adjusts the flow direction according to the detection result, and completes the switching of sample inlet or waste liquid delivery. The device has high integration and simple operation, and is suitable for the efficient and accurate requirements of modern analytical chemistry, especially in trace analysis, which can significantly improve the working stability and safety of the graphite furnace atomizer.

The application provides a preparation method of an ErBCO superconducting target material, and belongs to the technical field of oxide target materials. In the application, nitric acid erbium, nitric acid barium, nitric acid copper, high-purity water, a dispersing agent and a binder are sequentially mixed, and then the mixture is subjected to segmented ball milling and spray granulation to obtain a mixed powder. Subsequently, the mixed powder is sequentially subjected to calcination, cold sintering and drying treatment to prepare the ErBCO superconducting target material. The cold sintering process can improve the density and other properties of the target material while reducing the cost, and has the advantages of significantly reducing the ceramic sintering temperature and shortening the sintering time.

The application discloses a kind of light absorption material glass for high-definition ultra-short inverter and preparation method thereof, and the light absorption material glass includes the following weight percentage components: quartz sand 40-50%, boric acid 6-12%, alumina 7-15%, sodium carbonate 1-10%, potassium carbonate 1-10%, lithium carbonate 0-2%, basic magnesium carbonate 0-3%, calcium carbonate 0-5%, barium nitrate 1-3%, zirconium oxide 0-3%, copper oxide 1-3%, potassium permanganate 3-6%, potassium chromate 0.2-1%, diiron trioxide 1-5%, cobalt trioxide 1-6%, nickel oxide 1-6%, vanadium pentoxide 1-6%, cerium oxide 0-1%. The light absorption material glass of the application is used for preparing ultra-short inverter, which can effectively improve the transmittance and resolution of ultra-short inverter.

The present invention discloses a perovskite catalyst with A-site defect precipitation, a preparation method and an application. The chemical formula of the catalyst is Pr x Ba x Sc y Co 1‑y O 3‑δ , where 0.3 < x < 0.5, 0.1 < y < 1, δ is the oxygen vacancy content, and 0 ≤ δ ≤ 1. The preparation method includes: dissolving praseodymium nitrate hexahydrate, barium nitrate, scandium nitrate hexahydrate and cobalt nitrate hexahydrate in deionized water, adding citric acid monohydrate and ethylenediaminetetraacetic acid for reaction, adjusting the pH to 3.00 - 9.00 with an ammonia aqueous solution, heating and stirring to form a gel, drying, grinding and calcining the obtained gel to obtain an A-site defect perovskite material; grinding the A-site defect perovskite material and then performing secondary calcination under the condition of introducing H2 to obtain the perovskite catalyst with A-site defect precipitation. The perovskite catalyst of the present invention has extremely high reaction activity and can be used to activate persulfate to degrade organic pollutants in wastewater.

The application relates to a low-temperature high-rate graphite negative electrode material and a preparation method thereof, and belongs to the technical field of high polymer materials. The low-temperature high-rate graphite negative electrode material comprises, in terms of weight parts, 25-35 parts of graphite, 1-2 parts of molybdenum disulfide, 0.8-1.2 parts of carbon black, 3-5 parts of nano titanium nitride, 3-5 parts of a low-temperature resistant modifier, 1-3 parts of butadiene styrene rubber emulsion, 1-5 parts of deionized water and 15-25 parts of N-methyl pyrrolidone. A compound is obtained by reacting a precursor prepared from lanthanum nitrate hexahydrate, barium nitrate and graphite powder with lithium fluoride, a pre-product is obtained by reacting the hydroxyl group of the compound with a silane hydrolysis product, and finally, the low-temperature resistant modifier is obtained by reacting the amino group of the pre-product with the double bond of a siloxane chain, the internal resistance is reduced, a gradient conductive network is formed, the volume change is buffered, and the rate performance of the negative electrode material is improved. The low-temperature high-rate graphite negative electrode material prepared by the application not only has good low-temperature resistance, but also has excellent high-rate performance and cycle stability.

The invention discloses a Pt-Ni alloy modified PBMPtNi catalyst as well as a preparation method and application thereof, and belongs to the field of electro-catalysis. The preparation method of the Pt-Ni alloy modified PBMPtNi catalyst comprises the following steps: stirring and mixing praseodymium nitrate, barium nitrate, manganous nitrate tetrahydrate, platinum tetrachloride, nickel nitrate hexahydrate and water, and completely dissolving metal salt ions to obtain a metal salt ion solution; adding ethylenediaminetetraacetic acid and citric acid into the metal salt ion solution, and adjusting the pH value to 7 to obtain a mixed solution; heating and stirring the mixed solution into gel; the preparation method comprises the following steps: preparing a Pt-Ni alloy modified PBMPtNi catalyst, drying the gel, grinding into powder, calcining, grinding to obtain a PBMPtNi sample, and preparing the Pt-Ni alloy modified PBMPtNi catalyst from the PBMPtNi sample through a hydrogen reduction method, the catalyst improves the Pt utilization rate, reduces the cost, and can greatly improve the ammonia electrooxidation reaction activity.

This invention discloses a method for low-temperature synthesis of tetragonal barium titanate powder and the resulting product. Using an ethanol solution of tetrabutyl titanate and an aqueous solution of barium nitrate as raw materials, a colloidal suspension is formed with a promoting liquid. The reactants are then dispersed under starch gelatinization to obtain a precursor. The precursor is then subjected to low-temperature heat treatment to obtain tetragonal barium titanate powder, thus achieving a simple solid-state method for low-temperature preparation of uniformly sized tetragonal barium titanate powder. The tetragonal barium titanate powder obtained by this invention has uniform grain size and high purity; the preparation method is simple, uses inexpensive raw materials, involves low-temperature synthesis, has a short preparation cycle, and low energy consumption, which is beneficial for large-scale industrial production.

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.

This invention relates to a preparation process for a heavy metal-free environmentally friendly aerosol agent. The aerosol agent is composed of the following raw materials in parts by weight: 10-60 parts perfluoroacetone, 20-50 parts potassium nitrate, 1-4 parts magnesium nitrate, 1-14 parts melamine, 4-15 parts dicyandiamide, 2-12 parts phenolic resin, 2-10 parts hexamethylenetetramine, 2-9 parts water-soluble polymer modified powder, 2-5 parts polyol composite igniter, 1-4 parts sucrose, 0.2-3 parts magnesium stearate, 0.1-2 parts composite lubricant, and 3-12 parts composite inorganic combustion aid and cooling agent. This technical solution completely eliminates heavy metal raw materials such as strontium nitrate and barium nitrate, and adopts a heavy metal-free composite formula. It leaves no toxic heavy metal residues after combustion, fully complies with REACH and SVHC global export environmental control standards, and has a wider range of applications. The copolymerization of phenolic resin and water-soluble polymer modified powder forms a high-density moisture-proof and antioxidant adhesive film, which effectively solves the problems of moisture absorption, oxidation, red spots, and cracking of traditional agents.

The application discloses a lithium-carbon fluoride battery electrolyte and application, and belongs to the technical field of lithium / carbon fluoride primary batteries. The lithium-carbon fluoride battery electrolyte comprises lithium salt, solvent and NO3 ‑ additive; the solvent comprises high dielectric constant solvent, ether solvent and nitrogen heterocyclic crown ether solvent; the NO3 ‑ additive is at least one of lithium nitrate, copper nitrate, ammonium nitrate, potassium nitrate, sodium nitrate, barium nitrate, zinc nitrate, lead nitrate, nickel nitrate, magnesium nitrate, calcium nitrate, strontium nitrate and cesium nitrate; the NO3 ‑ additive has a mass fraction of 5% to 20%. The high-concentration nitrate additive is introduced to form a protective layer on the surface of the lithium metal negative electrode, thereby inhibiting the side reaction of the lithium metal and the solvent and accelerating the Li + transporting effect, thereby reducing the polarization phenomenon during battery discharging; the nitrogen heterocyclic crown ether can promote the dissolution of the high-concentration nitrate and the lithium fluoride of the positive electrode in the battery discharging process, reduce the polarization of the battery and improve the energy density of the battery.

An organic-inorganic composite functional pigment preparation method, comprising the following steps: step 1, dissolving 10 parts of raw material A in 300 parts of water according to a mass ratio, and adding 2 parts of raw material B and 0.2 parts of polyethylene glycol; step 2, adding 5 parts of butyl titanate and 1 part of an organic acid, and heating at 75°C for reaction for 2 hours; step 3, adding 4 parts of ethylene glycol and 0.2 parts of hydrochloric acid, and carrying out stirring for 1 hour; step 4, carrying out aging under a sealed condition at 50°C for 24 hours, carrying out water washing and centrifugal separation, and carrying out oxygen-free calcination for 4 hours to obtain a pre-product; step 5, dispersing 10 parts of the product into 400 parts of N,N'-dimethylacetamide, adding 0.2 parts of 4-dimethylaminopyridine, adding 5 parts of a styrene-maleic anhydride copolymer, and heating at 45°C for reaction for 12 hours; and step 6, after washing with ethanol, separation, and drying, mixing a dispersing agent, a pigment, a coupling agent, and a solvent, and grinding a mixture to form a composite functional pigment. In step 1, A is a mixture formed by sodium tungstate and sodium metavanadate at a mass ratio of 2:8, and the raw material B is two or three selected from aluminum nitrate, zinc nitrate, cobalt nitrate, barium nitrate, manganese nitrate, and indium nitrate. The preparation method is simple and convenient, has low energy consumption and wide applicability, and has good economic efficiency and high efficiency in batch production.

This application discloses a continuous preparation method and system for nano-barium sulfate based on waste acid resource utilization and internal circulation. It belongs to the interdisciplinary technical field of industrial waste resource utilization and advanced inorganic nanomaterial preparation. It aims to solve the technical bottlenecks of traditional processes for preparing barium sulfate, such as wide particle size distribution, low purity, pollution caused by the formation of soluble barium nitrate from nitrate ions, and low resource utilization. The method uses industrial waste acid containing sulfuric acid and nitric acid and a barium source as raw materials. The two are fed into a dual-channel centrifugal atomizer for atomization, mixing and reaction. The molar ratio of sulfate ions to barium ions is controlled. After separation and washing of the reaction products, most of the acidic washing liquid is recycled for slurry preparation, a small part is bypassed for purification, and CO2 is recovered and recycled. Finally, the product is dried to obtain nano-barium sulfate powder.

The invention belongs to the technical field of new energy materials, and particularly discloses a double-phase solid electrolyte for synthesizing ammonia by electrochemical reduction of nitrogen, which is prepared by the following steps: uniformly mixing barium nitrate, cerium nitrate, zirconium nitrate and yttrium nitrate, crushing and pre-sintering to obtain BCZY powder; the preparation method comprises the following steps: doping Y2O3 into ZrO2, uniformly mixing, crushing and pre-sintering to obtain YSZ powder; and uniformly mixing the BCZY powder and the YSZ powder, carrying out mold pressing to prepare a green body, and sintering the green body at 1400-1500 DEG C for 10-12 hours to obtain the biphase solid electrolyte BCZY-YSZ. The invention also discloses a method for synthesizing ammonia by electrochemically reducing nitrogen by using the double-phase solid electrolyte as an electrolyte layer. According to the invention, long service life and reliability of the electrolyte can be ensured.

This invention discloses a photocurable composite solid electrolyte separator and its preparation method. The photocurable composite solid electrolyte separator includes a base film and a coating on the base film. The coating is obtained by applying a slurry. The raw materials for preparing the slurry include a modified solid electrolyte, a photoinitiator, a crosslinking agent, and a pore-forming agent. The modified solid electrolyte is a solid electrolyte treated with an inorganic nanoparticle precursor. The inorganic nanoparticle precursor is one or a mixture of aluminum isopropoxide, barium nitrate, tetrabutyl titanate, tetraethyl orthosilicate, tetrabutyl zirconate, and zinc acetate. The photoinitiator can initiate a crosslinking reaction under light irradiation to form a three-dimensional network structure, which significantly improves the heat resistance of the separator. The modified solid electrolyte can simultaneously improve the ionic conductivity and heat resistance of the separator, and effectively improve the problem of poor interfacial compatibility of solid electrolytes, ultimately achieving comprehensive optimization of the heat resistance, ion transport performance, and interfacial stability of the lithium battery separator.

The invention discloses a preparation method of barium carbonate powder. The preparation method comprises the following steps: respectively preparing a Ba (NO3) 2 solution and an NH4HCO3 solution by using deionized water; the preparation method comprises the following steps: dropwise adding an NH4HCO3 solution into a Ba (NO3) 2 solution under magnetic stirring, stopping magnetic stirring after the NH4HCO3 solution is dropwise added, and standing and precipitating the solution; and filtering and collecting the precipitate, washing the precipitate with deionized water during filtering, and carrying out vacuum drying to obtain the barium carbonate powder. According to the preparation method, barium nitrate is taken as a barium source, ammonium bicarbonate is taken as a carbon source, high-purity superfine BaCO3 powder is prepared through a double decomposition method, and the high-purity superfine BaCO3 powder has a witherite configuration, shows a granular structure which is uniformly distributed in a range of 100nm-200nm, and not only has more uniform particle size distribution, but also has a larger specific surface area.

The invention relates to a catalyst for synthesizing menthol through catalytic hydrogenation of thymol and a preparation method thereof.The catalyst is prepared through a coprecipitation method with cobalt nitrate, manganese nitrate and barium nitrate as active component precursors, and the preparation method specifically comprises the following steps that cobalt nitrate, manganese nitrate and barium nitrate are dissolved in deionized water to form a solution A; taking a potassium carbonate solution as a precipitator to form a solution B; mixing the solution A and the solution B to generate a precipitate by controlling the dripping rate and reaction conditions of the solution B; and centrifugally washing, drying and calcining to obtain catalyst powder, and finally forming particles. By optimizing the proportion of the active components and preparation process parameters, the problems of low activity, poor selectivity and insufficient stability of the existing catalyst are solved. The catalyst is suitable for industrial production and has the advantages of high efficiency, stability, low cost and the like.

The application belongs to the technical field of new energy materials, and specifically discloses a dual-phase solid electrolyte for electrochemical reduction of nitrogen to synthesize ammonia, which comprises the following steps: uniformly mixing and crushing barium nitrate, cerium nitrate, zirconium nitrate and yttrium nitrate, and then pre-sintering to obtain BCZY powder; uniformly mixing and crushing ZrO2 and Y2O3, and then pre-sintering to obtain YSZ powder; uniformly mixing the BCZY powder and the YSZ powder, and then molding into a green body; and sintering the green body at 1400-1500 DEG C for 10-12 h to obtain the dual-phase solid electrolyte BCZY@YSZ. The application also discloses a method for electrochemical reduction of nitrogen to synthesize ammonia by using the dual-phase solid electrolyte as an electrolyte layer. The application can ensure long-term service life and reliability of the electrolyte.