26results about How to "The process is simple and controllable" patented technology

The invention relates to the technical field of metal processing, in particular to a zirconium alloy plate texture control method for regulating recrystallization based on cold rolling deformation. The zirconium alloy hot-rolled plate blank is subjected to annealing treatment, so that an equiaxial grain structure with the proper size is obtained; cold rolling treatment is conducted on the zirconium alloy plate blank obtained after annealing treatment, different rolling deformation accumulation modes are introduced through total deformation design, rolling pass control and pass deformation control, and different dislocation and subgrain distribution states are formed in the zirconium alloy cold-rolled plate; and the zirconium alloy plate strip prepared through cold rolling deformation is subjected to annealing treatment, so that a completely recrystallized plate with refined grains and weakened texture is obtained, and the plasticity and forming performance of the zirconium alloy plate are improved. The technological process is simple, the recrystallized zirconium alloy plate with the basal texture weakened can be obtained only by slightly changing the zirconium alloy plate machining technology, the anisotropy of the zirconium alloy plate can be reduced, and therefore the use performance of the zirconium alloy plate is improved.

The invention relates to the technical field of neodymium-iron-boron magnetic materials, in particular to a preparation method of a large-size high-performance sintered neodymium-iron-boron magnet. According to the method, a blank of a layered structure is prepared by stacking magnetic powder with different components in a profiling stage, first grain boundary diffusion is accompanied in the sintering process, and then the large-size high-performance sintered neodymium-iron-boron magnet is prepared through traditional grain boundary diffusion (second time). The first grain boundary diffusion involved in the method is generated in the liquid phase sintering densification process, and concentration gradient diffusion is carried out along the grain boundary after a diffusion source is liquefied; and the second grain boundary diffusion is the concentration gradient diffusion of the heavy rare earth on the surface of the compact magnet towards the interior of the magnet. In a large-size magnet, the layered structure design is matched with the twice grain boundary diffusion technology, and the defect of insufficient depth in the traditional grain boundary diffusion technology can be overcome.

The invention relates to the field of iron phosphate preparation, in particular to heterogeneous doped iron phosphate, a preparation method thereof and heterogeneous doped lithium iron phosphate, and the preparation method of the heterogeneous doped iron phosphate comprises the following steps: S1, preparing a titanium-containing iron source solution and a phosphorus source solution; s2, mixing and reacting the iron source solution, the phosphorus source solution and an oxidizing agent to prepare titanium-doped amorphous iron phosphate; s3, aging and crystal transformation are conducted on the titanium-doped amorphous iron phosphate, and titanium-doped iron phosphate dihydrate is prepared; s4, uniformly adding a secondary doping aid into the titanium-doped iron phosphate dihydrate to form secondary doped iron phosphate dihydrate; the secondary doping aid contains at least one element of titanium, vanadium or niobium; and S5, dehydrating and drying the secondary doped iron phosphate dihydrate, and then carrying out high-temperature calcination to form the heterogeneous doped iron phosphate. The whole process is simple and controllable in technological process, stable in quality, low in cost and easy to industrially popularize, and the prepared lithium iron phosphate material is excellent in gram volume and rate capability and wide in application field.

A low-temperature synchronous short-cut nitrification and denitrification SBR (sequencing batch reactor) nitrogen removal method relates to the field of biological nitrogen removal of sewage and comprises the following steps: S1, adding common activated sludge into an SBR reactor; s2, starting a short-cut nitrification-denitrification nitrogen removal process under the condition of 28-32 DEG C until the accumulation rate of nitrite in a nitration reaction stage reaches 75-80%; s3, culturing the low temperature resistance of the short-cut nitrification-denitrification nitrogen removal process through stepped cooling; and S4, establishing a synchronous short-cut nitrification-denitrification SBR nitrogen removal process under a low-temperature condition through batch water feeding. The technical problem that the short-cut nitrification process is poor in low-temperature sewage treatment effect can be solved, and the sewage treatment efficiency is further improved.

The invention discloses a graphene film for lithium metal negative electrode protection and a preparation method thereof, belongs to the technical field of lithium batteries, and solves the problem of poor battery cycle performance caused by non-uniform deposition and dissolution of a lithium metal negative electrode in the prior art. The graphene film is formed by stacking graphene sheets, the structure is complete and free of defects, the thickness ranges from 0.02 micron to 1 mm, and the surface loading capacity ranges from 0.1 mg / cm < 2 > to 5 mg / cm < 2 >. The graphene film provided by the invention is applied to the surface of a lithium metal negative electrode, does not react with metal lithium and is stable in chemical property.

The invention relates to a lactic acid bacteria composition and an application thereof in a low-temperature liquid biological feed, in particular to a lactic acid bacteria complex microbial inoculant suitable for a low-temperature environment (15-25 DEG C) and a fermentation process of the lactic acid bacteria complex microbial inoculant. The combination comprises pediococcus pentosaceus WP101 (the preservation number is CCTCC NO: M 20241055) and lactobacillus plantarum PC01 (the preservation number is CCTCC NO: M2022106), and the viable count of the combination is 25 million cfu / g feed according to the proportion of 1: 1. By optimizing the synergistic effect of strains and fermentation conditions, efficient fermentation in a low-temperature environment is realized, the content of lactic acid in the feed is remarkably increased, and growth of harmful microorganisms is inhibited. Animal experiments show that the fermented feed can reduce the diarrhea rate of piglets by 45.5% (Plt; 0.05), improve the daily gain of fattening pigs in the later period and the feed conversion rate, and reduce the loss of dry matters at the same time. The problem of energy consumption caused by the fact that traditional medium-temperature fermentation depends on heating and heat preservation is solved, technical support is provided for large-scale low-temperature liquid biological feed production, and economic and environmental benefits are achieved.

The invention provides a proton conduction composite membrane for a flow battery and a preparation method thereof, and the method comprises the following steps: dissolving polyvinylidene fluoride and a first modified additive in a first organic solvent, and stirring for the first time to obtain a first membrane casting solution; dissolving polybenzimidazole and a second modified additive in a second organic solvent, and stirring for the second time to obtain a second membrane casting solution; the preparation method comprises the following steps: coating a flat carrier surface with a first membrane casting solution, carrying out tape casting to form a first thin layer, carrying out first-time baking oven heating until the first thin layer is completely dried to obtain a base membrane, coating a second membrane casting solution on the base membrane surface, carrying out tape casting to form a second thin layer, and carrying out second-time baking oven heating until the second thin layer is completely dried. The membrane surface resistance is greatly reduced, the coulombic efficiency of the flow battery is improved, the stable operation life of the flow battery is prolonged, the production cost is low, the technological process is simple and controllable, the membrane performance is stable and reliable, the battery efficiency is remarkably improved, the technical industrialization amplification difficulty is low, and automatic continuous production can be realized.

This invention relates to the field of microbial fermentation technology, specifically a method for preparing Rehmannia glutinosa through simultaneous fermentation with compound bacteria and a laxative effect. This method involves extracting four types of probiotics that meet national safety standards: Lactobacillus acidophilus, Bifidobacterium longum, Lactobacillus casei, and Saccharomyces cerevisiae, and then formulating a high-concentration compound bacterial agent according to the live bacteria ratio. The initial fermentation material is adjusted to a material-to-water ratio of 1:5 and a suitable pH is maintained. After autoclaving, the materials are inoculated with bacteria at a weight-to-volume ratio for biological culture. The entire system is placed in a 37°C environment for continuous constant-temperature static co-fermentation. Through specific enzymatic hydrolysis and metabolic pathways of multidimensional bacterial communities, the absolute content of the core active ingredient catalpol and soluble dietary fiber in the final product is significantly increased. This bio-fermentation process effectively eliminates the potential risk of spleen and stomach irritation and damage from traditional Chinese medicinal materials. The resulting dry powder raw material can be widely and safely used in the preparation of microecological functional foods or pharmaceutical preparations targeting constipation symptoms caused by intestinal dryness and fluid deficiency.

The invention belongs to the technical field of oil-water mixture separation materials, and particularly relates to a submerged super-amphiphobic oil-water separation material as well as a preparation method and application thereof. The preparation method of the submerged super-amphiphobic oil-water separation material comprises the following steps: (1) carrying out photoresist removal, acidification and vacuum plasma pretreatment on carbon fibers; (2) growing Co (OH) 2 nanocrystals on the surfaces of the pretreated carbon fibers in a coating manner, and carrying out calcination treatment to convert Co (OH) 2 into Co3O4; and (3) converting Co3O4 on the surface of the carbon fiber obtained in the step (2) into CoS2 in situ under the action of a vulcanizing agent to obtain the submerged super-amphiphobic oil-water separation material. The method has the beneficial effects that the material prepared by the method has excellent submerged super-amphiphobic property, shows super-oleophobicity underwater and super-hydrophobicity under oil, can efficiently separate light oil / water and heavy oil / water mixtures, and has the separation efficiency of 90% or above. The method has a wide application prospect in the field of complex oil-water separation.

This invention provides a method for preparing a vanadium-titanium catalyst repair agent and a method for repairing vanadium-titanium catalysts using the agent. The preparation method of the repair agent is as follows: A seed mother liquor from the Bayer process for alumina production is added to lime slurry and stirred to obtain a filter cake and filtrate; the filter cake is added to a mixed solution of organic acid and ammonium salt and stirred to obtain an active component replenishment solution; aluminum hydroxide slurry from the Bayer process for alumina production is added to a citric acid solution and stirred to obtain an aluminum sol strength repair solution; the active component replenishment solution and the aluminum sol strength repair solution are then mixed to obtain the final product. The repair method is as follows: the vanadium-titanium catalyst to be repaired is immersed in the repair agent, dried, and calcined to obtain the final product. This invention cleverly incorporates the Bayer process to obtain the key materials required for the repair process, thereby achieving the repair of vanadium-titanium catalysts; after repair, the radial and axial compressive strength, wear resistance, and catalytic activity of the catalyst are all significantly improved.

The application provides a kind of over rumen schizochytrium sp. Powder and its preparation method and application, product includes schizochytrium sp. Powder core material and coating protective layer two parts;Wherein, the schizochytrium sp. Powder core material is prepared by schizochytrium sp. Powder, forming agent, antioxidant and digestion promoting agent;The coating protective layer is prepared from over rumen protective material.The preparation method of the application obtains nanofiber protection structure by whole low-temperature process, new over rumen coating technology, realizes the technical effect that DHA of schizochytrium sp. Powder is high retention, high utilization, high stability, to effectively improve the enrichment of DHA in beef, simple process, good repeatability, can be widely applied in ruminant functional feed additive field, with good industrialization prospect and popularization value.

The invention discloses a high-entropy alloy nitride coating, a preparation method of the high-entropy alloy nitride coating and a wear-resistant part, the coating is an AlTiVCrMoSiN high-entropy alloy nitride coating, and in corresponding preparation raw materials, the element content of Al ranges from 10% to 30%, the element content of Ti ranges from 10% to 30%, the element content of V ranges from 10% to 30%, and the element content of Cr ranges from 10% to 30%. The element content of Mo ranges from 5% to 25%, and the element content of Si ranges from 1% to 10%. The coating has a compact and uniform feature-free structure, and has excellent mechanical properties, high elastic modulus, wear resistance and good surface quality. The preparation method of the AlTiVCrMoSiN high-entropy alloy nitride coating comprises the step of preparing the AlTiVCrMoSiN high-entropy alloy nitride coating on the surface of a matrix by adopting a cathode arc ion plating deposition method. The preparation method is simple, high in deposition rate and suitable for industrial production.

The application discloses a preparation method of low specific surface area superfine alumina powder, which comprises the following steps: acid pickling and impurity removing: industrial gamma alumina is added into an acid pickling solution, and is pressed, filtered, dried to obtain low-sodium alumina; wet grinding: the low-sodium alumina is configured into slurry, is firstly put into a stirring mill for coarse grinding treatment, and then is put into a sand mill for sand grinding treatment to obtain superfine alumina slurry; spray drying: the superfine alumina slurry is subjected to spray drying in a spray drying tower to obtain superfine alumina granulation powder; calcination and phase conversion: the superfine alumina granulation powder is put into a sagger, is transferred into a calcining furnace for calcination to obtain superfine alumina granulation calcined powder; scattering and depolymerization: the superfine alumina granulation calcined powder is subjected to airflow scattering to obtain low specific surface area superfine alumina powder. The method has low cost, simple and easy-to-control process, and the prepared superfine alumina powder has better primary crystal appearance integrity and powder dispersibility.

This invention discloses a method for preparing Ganoderma lucidum and jujube seed compound freeze-dried flash release tablets by enzymatic hydrolysis and fermentation, which relates to the field of traditional Chinese medicine preparation technology. The method includes the following steps: (1) Raw material pretreatment: Jujube seed is crushed and mixed with citrate buffer to obtain jujube seed slurry; Ganoderma lucidum fruiting body is ultra-finely pulverized and mixed with cut lily petals to obtain mixed raw materials. This invention uses a specific ratio of compound enzymes (cellulase, pectinase, β-glucanase) in an optimized acidic environment for enzymatic hydrolysis, which can efficiently and selectively destroy the plant cell walls of jujube seed, Ganoderma lucidum and lily, and fully release the active ingredients in the cells; the subsequent fermentation of Lactobacillus plantarum can further decompose the substrate and may produce new beneficial metabolites, forming a synergistic biotransformation, which greatly improves the extraction rate of total active ingredients and product value.

The invention provides a preparation method of nano cobalt hydroxide, belongs to the technical field of preparation of lithium ion battery materials, and solves the problems that an existing nano cobalt hydroxide preparation process is complex, high in requirements for production equipment and unfavorable for large-scale product.The preparation method comprises the steps that a solution A and a solution B are prepared according to three conditions, and a synthetic reaction and aging are conducted after preparation; after aging is finished, washing the prepared cobalt hydroxide slurry; the washed cobalt hydroxide material is dried; and crushing the dried cobalt hydroxide to obtain a nanoscale cobalt hydroxide product. The prepared nanoscale cobalt hydroxide is small in specific surface area, does not need to add a dispersing agent, is simple in raw material and process, is easy to wash, and is easy for industrial production.

The application discloses a microwave communication material with low dielectric constant and low microwave loss which is prepared by mixing a base body and ceramic hollow microspheres, wherein the base body is an engineering plastic or a ceramic matrix composite base body, and the ceramic hollow microspheres are micron-sized mullite / quartz composite ceramic hollow microspheres; the material is used for manufacturing a 5G antenna cover, a radio frequency base material or a high-frequency PCB, and has the advantages that the micron-sized mullite / quartz composite ceramic hollow microspheres greatly reduce the overall density of the composite material, realize lightweight of the antenna cover and the radio frequency base material, and cooperate with forming processes such as segmented pressurization, step curing and slow cooling, so that the internal stress of the material is significantly reduced, the size stability of the high-frequency PCB and the antenna cover is greatly improved, and the problems of easy warping, deformation and poor precision of traditional inorganic fillers are solved.

The invention relates to the technical field of aluminum alloy conducting bars, and discloses a high-conductivity aluminum alloy conducting bar and a preparation method thereof. According to the method, the content of alloy components is accurately controlled, specific aluminum bar homogenizing temperature and cooling speed requirements are adopted, specific extrusion temperature and speed are adopted, cold deformation is performed before and after aging, and a two-stage aging process is adopted; the aluminum alloy conducting bar has the comprehensive performance of high conductivity (greater than or equal to 62% IACS), high thermal conductivity (greater than or equal to 220W / (mK)), high strength (tensile strength greater than or equal to 110MPa and yield strength greater than or equal to 110MPa) and good toughness (ductility greater than or equal to 12% and hardness greater than or equal to 30HV), meets the requirements of the field of electrical materials for high-conductivity aluminum alloy, and has wide application prospects. The problems that the material strength is reduced, the process is complex, the cost is high and the like when the electric conductivity is improved in the prior art are solved, and the method has remarkable superiority and wide application prospects.

This application provides a high-hydrogen-storage-capacity AB2-type hydrogen storage alloy that can be activated at room temperature, its preparation method, and its application. The chemical composition of the AB2-type hydrogen storage alloy is Ti. a Zr 1‑a Mn b Cr c Fe d RE f Wherein, 0.70≤a≤0.90, 0.7≤b≤1.3, 0.7≤c≤1.0, 0<d≤0.3, 1.7≤b+c+d<2.0, 0<f≤0.3; RE represents a combination of two or more rare earth elements. This application, through the synergistic addition of at least two rare earth elements and precise control of the content of each element in the alloy, achieves high hydrogen storage capacity while realizing rapid activation at room temperature, exhibiting moderate hydrogen absorption / desorption plateau pressure and excellent cycle stability. The preparation method provided in this application is simple and easy to industrialize. The hydrogen storage alloy provided in this application can be widely used in hydrogen energy storage, transportation, and utilization, and has broad market application prospects.

The invention provides a preparation method of a multi-component structure gradient material and a gradient structure, and relates to the technical field of functional gradient structural design, the preparation method comprises the steps that a component gradient model and a structural gradient model are built through simulation software, the component gradient model comprises a plurality of single-component wafers with different densities, and the structural gradient model comprises a plurality of single-component wafers with different densities; the structure gradient model comprises a plurality of regulation and control structure elements with the same size; a plurality of regulation and control structure elements are arranged on the upper surface of the component gradient model in a preset arrangement mode, so that a multi-component gradient structure model is formed, and the sectional area of the structure element model is gradually increased from the direction away from the component gradient model to the direction close to the component gradient model; and the multi-component gradient structure corresponding to the multi-component gradient structure model is prepared on the basis of printing parameters and the 3D printing technology, the printing parameters comprise the single-component wafer layer thickness, the exposure intensity and the printing speed, and the impedance adjustable range of the structure gradient material can be improved easily.

The application relates to a perovskite cell electron transport layer, a perovskite cell and a preparation method, and belongs to the photovoltaic field. 60 The precursor solution is prepared, C 60 The precursor solution takes an organic solvent as a solvent, part or all of the organic solvent is a chlorobenzene solvent, C 60 and an additive is a solute, the additive is a cationic surfactant; the formed film layer is dense and uniform, the interface is firmly combined, the open-circuit voltage and the fill factor of the prepared cell device are improved, the photoelectric efficiency is improved, and the anti-radiation performance is enhanced.

The invention belongs to the technical field of building materials, and discloses low-carbon low-shrinkage lightweight concrete prepared on the basis of multi-source industrial solid wastes and a preparation method of the low-carbon low-shrinkage lightweight concrete. The low-carbon low-shrinkage lightweight concrete prepared on the basis of the multi-source industrial solid wastes is prepared from the following raw materials in parts by weight: 250 to 640 parts of cement, 150 to 250 parts of silica fume, 190 to 210 parts of fly ash microspheres, 260 to 650 parts of phosphorus slag, 1100 to 1300 parts of quartz sand, 10 to 15 parts of a de-foaming agent, 12 to 20 parts of a water reducing agent, 200 to 300 parts of water and 120 to 200 parts of fibers. According to the low-carbon low-shrinkage lightweight concrete prepared on the basis of the multi-source industrial solid waste, the synergistic utilization efficiency of the multi-source industrial solid waste can be remarkably improved, and high-value conversion of solid waste recycling is promoted; the comprehensive performance of low carbon, light weight and high strength can be considered, and the multiple performance requirements of modern structural materials are met.

The invention discloses a PESA / N-CQDs scale inhibitor and a preparation method and application thereof.The preparation method comprises the steps that citric acid, urea and a polyepoxysuccinic acid salt solution serve as raw materials, nitrogen-doped carbon quantum dots are prepared through a hydrothermal method (150-170 DEG C, 3-5 hours), then polyepoxysuccinic acid is obtained through precipitation and drying treatment, and the PESA / N-CQDs scale inhibitor is obtained. And finally, mixing the nitrogen-doped carbon quantum dots with polyepoxysuccinic acid, adjusting the pH value to 7-8, stirring and reacting for 20-28 hours at the temperature of 75-85 DEG C, and precipitating, washing and drying to obtain the PESA / N-CQDs scale inhibitor. The method is simple, convenient and controllable in process, environment-friendly, good in product dispersity, capable of showing excellent scale inhibition efficiency after being added in a trace amount, suitable for scale inhibition treatment of various scale-containing systems such as industrial circulating water and oilfield production water, and good in application prospect.

The application belongs to the technical field of high polymer materials, and discloses a fluorine-free high and low temperature resistant organic silicon modified polyurethane elastomer as well as a preparation method and application thereof. The elastomer is prepared from an organic silicon modified polyurethane base and a peroxide compound solution, the mass of the peroxide compound solution is 1-5% of the mass of the organic silicon modified polyurethane base; the preparation raw materials of the organic silicon modified polyurethane base include 4,4'-dicyclohexyl methane diisocyanate, hydroxyl-terminated polybutadiene, monohydroxy polydimethylsiloxane, N1-(3-aminopropyl)-N1-dodecylpropane-1,3-diamine and 3-glycidyl ether oxypropyl triethoxysilane; the peroxide compound solution is prepared by dissolving benzoyl peroxide and dicumyl peroxide with a mass ratio of 1:0.5-1:2 in an organic solvent, stirring at room temperature until completely dissolved, and then preparing a homogeneous peroxide solution with a mass fraction of 5-20%.

The invention discloses a preparation method for synthesizing a high-temperature-resistant viscous material. The high-temperature-resistant viscous material is mainly composed of a poly (oxazolidinone) derivative (POL), an AB type hydrophilic-hydrophobic block copolymer, a nano reinforcement, microcapsules and the like. The preparation method comprises the following steps: ultrasonically dispersing the POL, the copolymer and the nano reinforcement in NMP, adding the microcapsule to prepare a pre-glue solution, carrying out argon plasma treatment on a base material, then coating, and carrying out stepped curing to trigger cyclization. The material has excellent high-temperature tolerance and self-repairing capability, is suitable for bonding metal or ceramic structures in extreme environments such as aerospace, nuclear power and the like, and can realize long-term stable bonding and self-repairing in a range of 200-400 DEG C.

The invention relates to a method for removing Ca ions in a nickel aminosulfonate solution based on an extraction method, which comprises the following steps: (1) preparing a sodium soap organic solution, namely diluting P204 by using light white oil to obtain a solution before saponification with the hydrogen ion concentration of 0.2 g / L, adding a sodium hydroxide solution into the solution before saponification to carry out sodium soap reaction, the sodium soap organic solution with the hydrogen ion concentration of 0.02-0.04 g / L is obtained; (2) preparing a nickel soap organic solution: adding a diluted nickel aminosulfonate solution into the sodium soap organic solution for extraction to obtain the nickel soap organic solution; (3) nickel soap organic sodium washing: carrying out sodium washing on the nickel soap organic solution by using a sulfamic acid solution to respectively obtain a pre-solution and a sodium washing solution; (4) extraction and impurity removal: extracting the nickel aminosulfonate solution by adopting the pre-solution to obtain a raffinate solution of which the nickel content is greater than 170g / L, the Ca ion content is less than 4mg / L and the pH value is greater than 3.5; and (5) backwashing with an extracting agent: adding a saturated sulfamic acid solution into the organic solution extracted in the step (4) for backwashing. The method is efficient and environment-friendly.

The present invention discloses a layered ordered@disordered core-shell structure lithium ion battery positive electrode material and its preparation method and application, belonging to the technical field of lithium ion battery positive electrode materials. The present invention adopts a high-temperature molten salt method, and its preparation process is as follows: firstly, a hydroxide precursor or a carbonate precursor is prepared by a coprecipitation method, and then a layered ordered oxide Li (Ni x Co y Mn 1‑x‑y )O2, and then evenly mix it with an appropriate amount of molten salt and calcine it at high temperature to extract the layered ordered structure Li(Ni x Co y Mn 1‑x‑y )O2 surface lithium / oxygen to obtain Li(Ni x Co y Mn 1‑x‑y )O2@Li 1‑m (Ni x Co y Mn 1‑x‑y ) 1+m O2 core-shell structure material. This method can prepare core-shell structure oxide materials with different shell thicknesses by adjusting the molten salt ratio and calcination temperature in the high-temperature molten salt section, and has excellent cycle stability, which can be effectively used in the preparation of lithium-ion batteries.