32results about How to "The process steps are simple" patented technology

This invention discloses a method for purifying metallic selenium through continuous multi-stage vacuum distillation: S1: Crude selenium powder is placed in a graphite crucible, the temperature of the crucible heater is set to 350-500℃, the temperature of the temperature-controlled heater is set to 250-350℃, and the vacuum degree of the distillation apparatus is controlled to 0.1-10 Pa for first-stage vacuum distillation; S2: The temperature of the crucible heater is set to 200-300℃, the temperature of the temperature-controlled heater is set to 600-900℃, and the vacuum degree of the distillation apparatus is controlled to 0.1-10 Pa for second-stage vacuum distillation. This invention, by selecting and controlling the temperatures of the crucible heater and the temperature-controlled heater during the purification process, enables continuous multi-stage vacuum distillation to purify metallic selenium. This avoids the need for multiple heating and cooling cycles and multiple material handling processes required in traditional methods, reducing energy consumption and pollution caused during handling. The process steps are simple, and the overall process time is significantly shortened.

This application provides a method for preparing gallium oxide (GaO) with enhanced ultraviolet absorbance and a GaO material prepared according to this method. First, a GaO thin film capable of generating ultraviolet absorption is grown on a substrate by magnetron sputtering. The GaO thin film is then annealed. Next, a copper thin film is grown on the GaO thin film by magnetron sputtering, followed by rapid annealing, causing the copper film to crack into copper nanoparticles under heat. This preparation method utilizes copper nanoparticles to enhance the ultraviolet absorption performance of GaO. The process steps are simple and easy to operate, thus effectively reducing the preparation cost. Furthermore, the GaO material prepared by this method shows a significant improvement in ultraviolet absorbance.

The application provides a method for preparing 3.5-valence vanadyl sulfate electrolyte by reducing ammonium polyvanadate with a gas, which comprises the following steps: (1) ammonium polyvanadate is reduced and calcined by a reducing gas to obtain vanadium oxide; the vanadium oxide contains V4O7; the reducing gas comprises a mixed gas of NH3, CO and H2; (2) a mixed sulfuric acid solution and the vanadium oxide are subjected to a dissolution reaction, and vanadium adjustment is performed to obtain 3.5-valence vanadyl sulfate electrolyte. The process is simple and easy to implement, 3.5-valence vanadyl sulfate electrolyte product can be obtained from ammonium polyvanadate as raw material, the vanadium concentration is high, and the application prospect is wide.

The invention relates to the technical field of grain and oil by-product high-value utilization and food functional ingredient preparation, in particular to a nitrogen-rich mesoporous carbon-based cholesterol adsorption ingredient as well as a preparation method and application thereof. According to the method, soybean meal and rice bran are taken as a carbon source and an endogenous nitrogen source, and urea or melamine is compounded as an exogenous nitrogen-rich precursor, so that an internal-external synergistic nitrogen-rich system is constructed; the method comprises the following steps: compounding a zinc chloride or potassium hydroxide chemical activator with a ferric chloride catalytic graphitizing agent to form a nitrogen-rich-catalytic synergistic conversion system; the method comprises the steps of raw material pretreatment, nitrogen-rich slurry preparation, catalytic activation precursor preparation and the like. The prepared carbon-based ingredient has a developed mesoporous structure and high-content alkaline nitrogen-containing functional groups, and is large in cholesterol adsorption capacity and high in selectivity, and the raw materials are grain and oil processing byproducts, so that the cost is low, and the carbon-based ingredient is green and environment-friendly; the preparation process has the advantages of controllable parameters and good repeatability, is suitable for industrial production, and provides a new technical path for the development of functional food ingredients for reducing blood fat.

This invention relates to an additive manufacturing method for strain rate-enhanced composite gels, comprising: a) polymerizing silicone oil, boric acid, and octanoic acid at high temperature to prepare a shear-hardening gel; b) introducing the shear-hardening gel into a polyvinyl alcohol aqueous solution and adding chitosan particles, followed by ball milling to obtain a composite gel precursor; c) printing the composite gel precursor using pneumatic extrusion combined with a triaxial motion control system, and then obtaining the composite gel through freeze-thaw treatment. This composite gel precursor is propelled from the nozzle by air pressure in a pneumatic extruder, and the triaxial motion control system enables the deposition of arbitrary two-dimensional patterns and the stacking of three-dimensional structures, overcoming the limitations of traditional strain rate-enhanced composite gels formed by molding and injection molding methods, and endowing it with greater molding freedom and higher molding precision in additive manufacturing.

This invention discloses a highly wear-resistant and corrosion-resistant multi-principal element alloy and its preparation method, belonging to the field of metallic material preparation technology. It includes four main alloying elements (Al, Cr, Fe, and Ni) and a dopant element (Mn). The chemical composition of the multi-principal element alloy satisfies the general formula Al... a Cr b Fe c Ni d Mn e Where a is the atomic percentage of Al, b is the atomic percentage of Cr, c is the atomic percentage of Fe, d is the atomic percentage of Ni, and e is the atomic percentage of Mn, with the sum of the atomic percentages of each element being 100%. This invention regulates the phase, microstructure, and elemental distribution of the alloy through Mn doping, resulting in an alloy that possesses high hardness, excellent corrosion resistance, and corrosion wear resistance, as well as good plastic processing performance. The supporting preparation method is simple, with controllable parameters and readily available raw materials, making it suitable for large-scale industrial production. It can be widely used in key structural components of marine engineering equipment and other equipment operating under harsh corrosion-wear coupling conditions.

This invention discloses a coal gangue grouting and filling material with high rheological resistance and resistant to bleeding, its preparation method, and its application, relating to the field of mine filling material technology. The grouting and filling material, by mass percentage, comprises: 70%~75% coal gangue, 0.55%~2.3% composite rheology modifier, and the balance being water; wherein the composite rheology modifier includes an air-entraining agent and a dispersant, with a mass ratio of (90~99):(1~10); the air-entraining agent is a surface-active foaming material, and the dispersant is a phosphate additive. In its preparation, coal gangue is first mixed with water and stirred to obtain an initial slurry; then the air-entraining agent and dispersant are mixed to prepare the composite rheology modifier; finally, the composite rheology modifier is added to the initial slurry and stirred until homogeneous to obtain the grouting and filling material. This grouting and filling material uses coal gangue as the main raw material, has a simple preparation process, and possesses excellent fluidity, stability, and pumpability.

The application provides a wurtzite boron nitride / diamond composite material and a preparation method and application thereof. The composite material is composed of two phases of wurtzite boron nitride and diamond, and has a stacked sandwich microstructure, which comprises at least one first wurtzite boron nitride layer composed of wurtzite boron nitride, at least one second wurtzite boron nitride layer composed of wurtzite boron nitride, and a diamond layer composed of diamond and sandwiched between the first wurtzite boron nitride layer and the second wurtzite boron nitride layer. The wurtzite boron nitride is a metastable phase stably existing under normal pressure, and the Vickers hardness of the composite material is greater than 50 GPa. The novel wurtzite boron nitride / diamond composite material has high hardness, high toughness and high thermal stability, and the preparation method has low starting material price and simple preparation process.

This invention discloses a high-strength, high-elongation, low-hardness natural rubber and its preparation method. By weight, the high-strength, high-elongation, low-hardness natural rubber comprises the following components: 100 parts natural rubber, 1.5-3 parts crosslinking agent, 0.8-2 parts accelerator, 10-20 parts reinforcing agent, 5-15 parts softener, 1-3 parts antioxidant, and 3-8 parts activator. The high-strength, high-elongation, low-hardness natural rubber has a tensile strength ≥20 MPa, an elongation ≥700%, and a Shore A hardness of 35-45. Under normal operating conditions of -20℃ to 80℃, the fluctuation range of the tensile strength and elongation is controlled within ±5%, and the Shore A hardness fluctuation is ≤±2. This invention solves the technical problem of achieving a balance between high strength, high elongation, and low hardness in existing natural rubber formulations. The formulation components of this invention are widely available, the preparation process is simple, and the production cost is controllable. It can be widely applied in multiple fields and has extremely high practical value and promising prospects for promotion.

This disclosure provides a method for preparing ultrathin glass, ultrathin glass, and a display device, belonging to the field of ultrathin glass technology. It aims to reduce the risk of fragmentation during the manufacturing process of ultrathin glass. The method includes: laser cutting a thinned glass raw material to cut it into multiple glass sheets with chamfered edges; wherein the laser cutting is used to form the chamfers at the edges of the glass sheets while dividing the glass raw material into multiple glass sheets; tempering the glass sheets; and edge processing the tempered multiple glass sheets to obtain multiple ultrathin glass sheets; wherein the edge processing includes at least edge polishing.

The application discloses a coal-based hard carbon negative material of a sodium ion battery and a preparation method thereof, and the preparation method is as follows: coal powder and starch are uniformly mixed to obtain a coal-based hard carbon precursor; then the precursor is placed in a high-temperature and high-pressure device, the device is heated and pressurized, and the precursor is cross-linked and pre-carbonized, so that the cross-linking degree between the starch and the coal powder is greatly improved; then, the pre-carbonized material after treatment is secondarily crushed, after the crushing is completed, the material is placed in a high-temperature and inert gas atmosphere for carbonization, and finally, the coal-based hard carbon negative material with excellent performance is obtained. The coal-based hard carbon product interlayer distance can be obviously improved, the electrochemical performance of the coal-based hard carbon is improved, and the processing technology is simplified.

The application relates to the technical field and discloses a high-purity separation and extraction method of ginsenoside Re, which comprises the following steps: adopting beta-cyclodextrin pretreatment, ethanol-ionic liquid-water green solvent ultrasonic extraction, specific enrichment through a ginsenoside Re molecular imprinting column, combining high-speed counter-current chromatography refining and freeze drying to obtain a product of high-purity ginsenoside Re. The method solves the problems of low purity, large pollution and long cycle in the prior art, improves the product purity and total recovery rate, reduces the organic solvent consumption, is stable and can be scaled up, and is suitable for the fields of medicines and health products.

The invention discloses a package carrier and a preparation method thereof, and a chip packaging structure, and the method comprises the steps: firstly, providing a substrate, carrying out the patterning of the substrate, forming a first through hole, enabling the first through hole to penetrate through the substrate in the thickness direction of the substrate, and enabling the first through hole to be provided with a first axis; the first through hole is provided with a first opening and a second opening which are oppositely arranged in the thickness direction, and the aperture of the first opening is smaller than that of the second opening. The first through hole is filled with a buffer structure, the buffer structure is patterned to form a second through hole, the second through hole penetrates through the buffer structure in the thickness direction, the second through hole is provided with a second axis, and the first axis and the second axis are collinear. And finally, preparing a conductive structure, wherein the conductive structure is located in the second through hole. The first axis and the second axis are collinear, so that the thickness distribution of the buffer structure around the conductive structure is uniform and consistent, the stress generated by the difference of thermal expansion coefficients between the substrate and the conductive structure is effectively buffered, and the risk of crack generation is reduced.

A semiconductor structure and a method for forming the same are disclosed. The method includes: providing a substrate; forming an isolation layer on the substrate; forming a growth layer on the isolation layer for growing a channel material; growing a stacked structure on the growth layer, the stacked structure including one or more stacked channel layers, the channel layers including a sacrificial layer and a channel layer on the sacrificial layer; forming a dummy gate structure spanning the stacked structure, the dummy gate structure covering the sidewalls and top of the stacked structure; forming source / drain doped layers on the substrate on both sides of the dummy gate structure, the source / drain doped layers contacting the ends of the stacked structure in the extending direction of the stacked structure; removing the dummy gate structure and the sacrificial layer, retaining one or more longitudinally spaced channel layers as a channel layer structure suspended above the growth layer; and forming a gate structure spanning the channel layer structure on the substrate, the gate structure surrounding the channel layer in the extending direction of the gate structure. This method is beneficial for improving the operating performance of the semiconductor structure.

This application relates to the field of genetic engineering technology, specifically to a ketone reductase mutant and its uses. The ketone reductase mutant is formed by one or more amino acid mutations in the amino acid sequence of the wild-type ketone reductase shown in SEQ ID NO. 2, which is derived from *Chryseobacterium* sp. When the ketone reductase and its mutant of this invention are used to resolve milobalin intermediates, the chiral purity of the target product is greater than 99.9%. Compared with currently reported methods for synthesizing target products, this invention avoids the use of metal catalysts when using ketone reductase and its mutant for target product synthesis, making the process greener, more environmentally friendly, and reducing costs. Furthermore, this ketone reductase mutant simplifies the resolution process while improving the chiral purity of the target product, resulting in a simple synthesis method.

The application discloses an environment-friendly eutectic solvent anti-friction and anti-wear additive and a preparation method and application thereof, and belongs to the field of lubricating additives.The application uses cetyltrimethylammonium chloride / cetyltrimethylammonium bromide and natural plant source thymol as raw materials, mixes them in a molar ratio of 1:1 to 1:3, stirs them at a constant temperature of 90 DEG C for 2 hours, and thus a sulfur-free and phosphorus-free transparent stable eutectic solvent is prepared without an organic solvent and a catalyst; the solvent is used as an anti-friction and anti-wear additive, is added into lithium-based lubricating grease in an addition amount of 0.5wt% to 2.0wt%, is uniformly dispersed through three-roll grinding, and thus high-performance modified lubricating grease suitable for severe working conditions is obtained.The raw materials are green and renewable, the preparation process is mild and simple, and the environment compatibility is excellent; a low addition amount can significantly reduce a friction coefficient and wear volume, a dense adsorption film is formed on a metal friction surface, and the application is particularly suitable for long-acting anti-friction and anti-wear lubrication under high-speed and boundary lubrication working conditions such as cotton picker picking spindles.

The application discloses a display panel, a display device and a preparation method of the display panel. The display panel comprises a substrate, an isolation structure and a first conductive functional layer. The isolation structure is arranged on one side of the substrate and comprises an insulating material. The isolation structure comprises a first isolation part, a first isolation opening and a second isolation opening which are formed by the first isolation part. The first isolation opening is used for accommodating a light emitting unit. The first conductive functional layer comprises a first electrode and a touch electrode which are arranged in an insulating and spaced manner. The first electrode is located on the side of the light emitting unit of the first isolation opening which is away from the substrate. The touch electrode is located in the second isolation opening.

The application discloses a phosphorus-carbon-aluminum fluoride composite material, a preparation method and application thereof, and a lithium ion battery negative electrode. The phosphorus-carbon-aluminum fluoride composite material comprises a phosphorus-carbon matrix and aluminum fluoride crystals dispersed in the phosphorus-carbon matrix, stable phosphorus-carbon covalent bonds are formed in the phosphorus-carbon matrix, and the mass ratio of the aluminum fluoride crystals to the phosphorus-carbon matrix is 5-20:80-95. Through mechanical force action of high-energy ball milling, the phosphorus source and the carbon material are promoted to form phosphorus-carbon covalent bonds, and meanwhile, the aluminum fluoride crystals are uniformly dispersed in the phosphorus-carbon matrix. The carbon material improves the conductivity of the material, the phosphorus-carbon bond enhances the interface bonding force and inhibits volume expansion, and the aluminum fluoride optimizes the interface structure, inhibits the dissolution and oxidation of polyphosphorus compounds. The three components synergistically make the material have high conductivity, structural stability and interface stability. The aluminum fluoride as an additive can significantly improve the fast-charging performance and long cycle life of the lithium ion battery.

This invention discloses a large-sheet battery-grade anhydrous ferric phosphate and its preparation method. The preparation method includes: S1, preparing a ferric sulfate solution with an iron concentration of 55-65 g / L and a monoammonium phosphate solution with a phosphorus concentration of 80-100 g / L; S2, adjusting the pH of the iron solution to 1-2, preheating the phosphorus solution to 50-60℃ as the base solution, adding the preheated iron solution dropwise, controlling the phosphorus-iron molar ratio to 1.18-1.28, maintaining the temperature at 50-60℃ for 0.5-1 h, and aging at 85-95℃ for 2-3 h to obtain an anhydrous ferric phosphate slurry; S3, filtering, washing, and drying the anhydrous ferric phosphate slurry to obtain ferric phosphate dihydrate; S4, calcining to obtain anhydrous ferric phosphate for large-sheet batteries. This method requires no additives, and the obtained anhydrous ferric phosphate has a regular large-sheet structure, a D50 particle size of 5.66-6.57 μm, and a tap density of 2.72 g / cm³. 3 The above-mentioned materials have high purity and are suitable for high-energy-density battery systems.

The application discloses a stator assembly and a motor. The stator assembly comprises a stator core and a stator winding. The stator core has a plurality of stator slots formed on a radially inner surface of the stator core and spaced apart along a circumferential direction of the stator core at a predetermined slot pitch. The stator winding comprises a plurality of phase windings mounted on the stator core and forms M layers on each stator slot, M being an odd number greater than or equal to 3. Each phase winding comprises a plurality of coil units connected in series. Each coil unit comprises a first U-shaped hairpin winding, an I-shaped hairpin winding and a second U-shaped hairpin winding. The first U-shaped hairpin winding is located at an innermost layer of the stator slot, the I-shaped hairpin winding is located at a middle layer of the stator slot, and the second U-shaped hairpin winding is located at an outermost layer of the stator slot. The opening direction of the first U-shaped hairpin winding and the second U-shaped hairpin winding is opposite. The stator assembly of the application avoids same-layer welding, greatly simplifies the process steps and reduces the welding difficulty.

This invention belongs to the field of spinning technology and discloses a spinning fixture and a wheel hub spinning forming process. The spinning fixture includes a support, a tailstock, a roller assembly, and a ejector plate. The support is mounted on a first driving member and is used to hold the blank. A through hole is formed in the center of the support along its axial direction. The first driving member controls the rotation of the support. The tailstock is mounted on a second driving member, which controls the raising and lowering of the tailstock relative to the support and controls the rotation of the tailstock. The roller assembly includes a first roller and a second roller. The ejector plate is adapted to rise relative to the support after the blank is spun and formed, so as to lift the spun and formed blank and detach it from the support. The wheel hub spinning forming process uses the above-mentioned spinning fixture. The spinning fixture and wheel hub spinning forming process provided by this invention effectively improve the complex multi-pass spinning process steps in the prior art, effectively improve production efficiency, and reduce manufacturing costs.

This invention relates to the field of pet food technology, specifically to a nutritional supplement pill for parrots, its preparation method, and its application. The nutritional supplement pill is composed of basic ingredients and functional ingredients. The basic ingredients include buckwheat kernels, barley kernels, black beans, red beans, soybeans, black rice, mung beans, red peanuts, Job's tears, black sesame seeds, oat kernels, corn, egg yolks, dried bananas, dried hawthorn berries, dried coconut, raisins, goji berries, purple sweet potatoes, sunflower seeds, walnuts, chili peppers, chickpeas, mealworms, flax seeds, dried dates, pumpkin seeds, and carrots. The functional ingredients include small peptides, vitamin C, brewer's yeast, sodium dehydroacetate, calcium lactate, methionine, lysine, and honey. The total weight percentage of the basic ingredients and functional ingredients is 100%. This nutritional supplement pill, through scientific formulation, closely matches the physiological needs of parrots, exhibiting excellent palatability and digestibility, thus comprehensively meeting the daily growth and health maintenance needs of parrots.

The invention discloses an environment-friendly long-acting antifouling paint and a preparation method thereof, and belongs to the technical field of paint materials and antifouling. The environment-friendly long-acting antifouling paint comprises the following components in parts by weight: 30-50 parts of a component A, 25-45 parts of a component B, 8-25 parts of a functional body, 1-5 parts of color paste and 0.3-3 parts of an auxiliary agent, the component A is an aliphatic isocyanate prepolymer which is prepared from aliphatic isocyanate and castor oil through a reaction, and the specific preparation raw materials comprise the following components in parts by weight: 20-40 parts of aliphatic isocyanate and 10-20 parts of castor oil; the component B is polyaspartic acid ester, and the molecular weight of the polyaspartic acid ester is 800-1500 g / mol; the castor oil has good reaction activity with aliphatic isocyanate, can significantly improve the flexibility of a prepolymer (polyurea precursor) and the cohesiveness with a base material, and can optimize the compatibility of the polyurea precursor with polyaspartic acid ester with the molecular weight of 800-1500 g / mol, thereby improving the mechanical stability and weather resistance of the whole polyurea paint coating. The technical problem that an existing coating material cannot give consideration to synergistic improvement of environmental protection property and mechanical property is solved.

The application relates to a zirconia / silicon carbide / silicon oxide nanofiber and a preparation method and application thereof. The method comprises the following steps: adding a liquid silicon source into a zirconium sol solution, stirring uniformly to obtain a spinning solution; performing electrostatic spinning on the spinning solution, drying to obtain a nanofiber precursor; performing oxygen-free sintering to obtain the zirconia / silicon carbide nanofiber; wherein the zirconia serves as a fiber center; a silicon carbide layer is coated outside the zirconia; heat treatment is performed to oxidize the silicon carbide layer close to the outer surface to obtain the zirconia / silicon carbide / silicon oxide nanofiber. The technical problem to be solved is how to provide the zirconia / silicon carbide / silicon oxide nanofiber, so that the nanofiber has high elasticity, high flexibility, low density, low thermal conductivity, strong comprehensive performance and greatly expands the popularization and application of the zirconia fiber.

The application discloses a high beryllium copper alloy strip based on electric pulse assisted rolling and a preparation method thereof, and belongs to the technical field of precipitation hardening alloy material processing. The preparation method comprises the following steps: S1, after preparing materials according to the mass percentages of various chemical components of the beryllium copper alloy to be prepared, the materials are put into a vacuum induction melting furnace to be vacuum melted into a liquid state, and then the liquid state is poured into a beryllium copper alloy ingot; S2, the beryllium copper alloy ingot is heated to a temperature of 800-850 DEG C, and then hot-rolled after being kept at the temperature for 15-20 hours to obtain a beryllium copper hot-rolled blank; S3, the beryllium copper hot-rolled blank is sequentially subjected to annealing treatment and face milling; S4, the beryllium copper hot-rolled blank after the face milling is sequentially subjected to rough rolling, edge cutting, solid solution treatment and electric pulse rolling to obtain a beryllium copper alloy strip. The beryllium copper alloy prepared by the application has no cracks under a large deformation, has a large degree of grain crushing, has a small grain size, has good formability, and has a short production flow and high production efficiency.

The invention relates to a lithium ion capacitor anode material pre-lithiation method based on direct contact of a lithium foil, which comprises the following steps: calculating the required area of the lithium foil according to the type of the lithium ion capacitor anode material, the lithium intercalation capacity and the thickness of the lithium foil; cutting the lithium foil according to the required area, and completely covering the lithium foil on the surface of the anode plate; the anode strip covered with the lithium foil is rolled, and it is ensured that the lithium foil is completely attached to the surface of the anode strip; adding a preset amount of electrolyte into the rolled anode plate, and sealing; fully standing the sealed anode strip to ensure that the lithium foil completely reacts and is completely pre-lithiated; and cleaning the pre-lithiated anode plate to finally obtain the pre-lithiated anode of the lithium ion capacitor. Compared with the prior art, a direct contact pre-lithiation method is adopted, and diaphragm-free anode pre-lithiation can be achieved through the self-discharge process.

This invention discloses a method for preparing monolithic SiC nanowire aerogels via in-situ carbothermal reduction, as well as the SiC nanowire aerogels prepared by this method and their applications, belonging to the field of advanced ceramic materials and aerogel preparation technology. This method uses biomass-derived cellulose fibers as the carbon source and three-dimensional template, silica nanoparticles as the silicon source, and NH4Cl as a volume shrinkage inhibitor. Through precursor preparation, freeze-drying, carbothermal reduction, and post-treatment steps, the controllable preparation of monolithic SiC nanowire aerogels is achieved. This invention features a simple, green, and economical process, is easily scalable, and allows for near-net-shape forming of complex shapes through mold design. The prepared aerogel has a three-dimensional interwoven nanowire network structure with a porosity as high as 99.7% and a thermal conductivity as low as 0.045 W / (m·K). It also exhibits excellent superelasticity, high-temperature stability, and high-efficiency oil absorption capacity, making it suitable for applications such as aerospace high-temperature insulation, energy system protection, and oil pollution treatment.

This invention relates to the technical field of tunnel construction methods, and in particular to a method for anchoring and pulling out anchors in the excavation section of a hard rock tunnel. The method includes the following steps: S1, setting the outline of the excavated rock mass and creating a weakened structural surface along the outline; S2, driving several anchor rods into the excavated rock mass and creating a rock mass structural surface with several anchor rod ends; S3, using construction machinery to pull out the anchor rods; S4, removing slag; S5, subsequent rock mass support. This invention features simple process steps, a reasonable design, convenient construction, and good performance. It can easily complete the excavation and construction process of hard rock tunnels, ensuring safety and guaranteeing the construction period.