17 results about "Barium nitrate" patented technology

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 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.

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 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 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.

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 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.

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.

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 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.

The invention discloses an activated carbon supported ruthenium catalyst for ammonia synthesis and a preparation method thereof. The catalyst is prepared by taking heat-treated activated carbon as a carrier, ruthenium metal as an active component and barium, silicon and cerium as auxiliaries. The preparation method of the catalyst comprises the following steps: firstly, carrying out heat treatment on activated carbon in an inert atmosphere and carrying out oxidation treatment in oxygen-containing mixed gas to obtain a heat-treated activated carbon carrier, drying, dipping in a carbonaceous organic matter aqueous solution, and carrying out oxidation treatment in a nitric acid atmosphere; then dipping and introducing barium nitrate and a ruthenium precursor solution, carrying out high-temperature treatment in an inert atmosphere, then adsorbing a silanol ammonia water solution, introducing a silicon component, finally dipping in a cerium nitrate water solution, and reducing to obtain the activated carbon supported ruthenium catalyst. Compared with the heat-treated activated carbon supported ruthenium catalyst prepared by the existing method, the catalyst prepared by the invention has higher ammonia synthesis activity and better application prospect.

The invention discloses a synthesis method of a chloride-free cationic etherifying agent, and belongs to the technical field of cationic etherifying agents, and the method comprises the following steps: adding methyldiethanolamine and a catalyst into a reaction kettle, controlling the temperature at 15-25 DEG C, then adding acid, and keeping the temperature at 15-25 DEG C for 2-4 hours; dropwise adding epoxypropane, and reacting at 30 DEG C for 5-10 hours to obtain a cationic etherifying agent crude product; wherein the catalyst is a mesoporous silica supported phosphotungstic acid catalyst and is prepared by the following steps: dissolving phosphotungstic acid and barium nitrate in absolute ethyl alcohol, mixing and reacting with an absolute ethyl alcohol solution containing cetyltrimethylammonium bromide, then adding tetraethoxysilane and cyclohexane, standing, carrying out suction filtration, drying and calcining to obtain the mesoporous silica supported phosphotungstic acid catalyst. The prepared catalyst has excellent catalytic activity and stability, can significantly improve the reaction conversion rate and selectivity, effectively inhibits side reactions, and can be repeatedly used. The finally obtained cationic etherifying agent is high in purity, does not contain chloride ions, and meets the requirements of green chemical industry.

Provide is a separator used for a secondary battery. The separator may be provided on a surface of the secondary battery that is in contact with a negative electrode, and may include a functional layer containing a nitrate. The porosity of the functional layer may be 5-95%, and the basis density of the nitrate is 0.01 g / cm3 to 3.0 g / cm3. 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.

This invention relates to the field of ferroelectric thin film materials technology, specifically to a ceramic-based high-energy-density ferroelectric thin film material and its preparation method, comprising the following steps: S1: premix preparation, S2: substrate preparation, S3: finished product preparation. The premix is ​​spin-coated and cured on the substrate surface to obtain the ceramic-based high-energy-density ferroelectric thin film material. In this invention, zinc and tin elements are introduced in the preparation of additives. Zinc can improve the insulation of the thin film material. The addition of tetrabutyl titanate and barium nitrate components in the mixture allows the titanium and barium elements contained therein to form a regular crystal structure inside the film, enabling it to orderly accommodate charges and avoid chaotic charge loss. Utilizing the larger ionic radius of barium ions, the crystal lattice can be expanded to form a stable interlayer structure, which can reduce charge loss and improve energy storage efficiency.

The invention provides a marine mass concrete with high crack resistance and corrosion resistance, which mainly comprises a high-iron phase cementing material, an internal curing aggregate, a fine aggregate, a coarse aggregate, a temperature shrinkage type fiber, an additive and the like, the high-iron phase cementing material can reduce the shrinkage and temperature stress of the mass concrete, improve the chloride ion erosion resistance, and improve the crack resistance and corrosion resistance of the mass concrete. The high-modulus heat-shrinkable organic fibers improve the crack resistance of the mass concrete in the heating / cooling stage, and the porous internal curing aggregate is subjected to water retention and pre-cooling treatment in a silver nitrate and barium nitrate solution, so that the internal temperature rise and self-shrinkage of the mass concrete are further reduced, the compactness of the concrete is improved, and the crack resistance of the mass concrete in the heating / cooling stage is improved. Meanwhile, chloride ions and sulfate ions in seawater are solidified, and the seawater corrosion resistance is further improved. The mass concrete prepared by the invention has the characteristics of low temperature rise, low shrinkage, high crack resistance and high corrosion resistance, and can effectively solve the problem of insufficient durability caused by easy cracking and poor seawater corrosion resistance of common marine mass concrete.

The invention relates to the field of novel wall materials, and particularly discloses a novel wall material for a building and a preparation method of the novel wall material. The novel wall material for the building is prepared from 210 to 240 parts of cement, 40 to 60 parts of fly ash, 70 to 90 parts of sand, 80 to 100 parts of filler microspheres, 60 to 80 parts of filling particles, 5 to 10 parts of anti-seepage particles, 1 to 3 parts of air entraining agent, 20 to 28 parts of connecting fiber, 1 to 2 parts of waterproof agent, 1 to 2 parts of dispersing agent and 100 to 110 parts of water, the anti-seepage particles are prepared by adhering barium nitrate and a spermaceti hard alcohol solution to high-molecular-weight sodium polyacrylate particles in a mass ratio of 10: (0.5-1): (2-4); the preparation method comprises the following steps: uniformly mixing the cement, the fly ash and the sand, then adding the filler microspheres, the filling particles, the anti-seepage particles and the connecting fibers, uniformly mixing, adding the dispersing agent, the water, the air entraining agent and the waterproof agent, and uniformly mixing to obtain the wall material. The wall material has the advantages that the salt spray resistance effect is good, and the strength of the wall material is guaranteed.