12results about How to "Increase supersaturation" patented technology

The invention discloses coal gasification slag-based self-foaming lightweight concrete and a preparation method thereof, and relates to the field of comprehensive utilization of lightweight foam concrete and solid wastes. The coal gasification slag-based self-foaming lightweight concrete is prepared from the following components in parts by weight: 50 to 60 parts of coal gasification fine slag, 20 to 30 parts of waste incineration bottom ash, 10 to 30 parts of composite admixture, 5 to 20 parts of composite exciting agent, 20 to 40 parts of fine aggregate, 40 to 60 parts of water, 0.3 to 0.5 part of sodium lactate, 0.3 to 0.5 part of water reducing agent, 0.3 to 0.7 part of cellulose ether and 0.3 to 0.5 part of redispersible latex powder. The invention has the advantages of low manufacturing cost, small environmental pollution, simple process flow, multiple curing modes and excellent performance in various aspects, can replace the traditional foam concrete, can effectively reduce the use of cement-based cementing materials, and promotes the recycling and large-scale utilization of solid waste materials.

The invention provides an Al-Mg-Zn-Mn alloy profile and a preparation method thereof, and relates to the technical field of aluminum alloy processing.The preparation method comprises the following steps that an Al-Mg-Zn-Mn alloy cast ingot is prepared, and the cast ingot contains a primary Al6Mn phase and a primary T-Mg32 (AlZn) 49 phase; performing soaking treatment on the cast ingot; cogging treatment is conducted on the cast ingot obtained after soaking treatment, then extrusion forming is conducted, so that a T-Mg32 (AlZn) 49 phase is redissolved into an aluminum matrix, online quenching is conducted, and an extruded profile is obtained; stretching and straightening the extruded profile; and aging treatment is conducted, specifically, aging treatment is conducted on the stretched and straightened profile, so that the T-Mg32 (AlZn) 49 phase is separated out, and the Al-Mg-Zn-Mn alloy profile is obtained. The content of Mn in the raw materials is increased, the mass percentage content ratio of Zn to Mg is controlled, the proportion of recrystallized grains is increased through high-temperature extrusion forming, and the supersaturation degree of a matrix is improved through online quenching; and after aging treatment, dispersed precipitation of a T phase is promoted, and the obdurability of the aluminum alloy profile is remarkably improved. According to the method, off-line solid solution quenching is not needed, and the Al-Mg-Zn-Mn alloy profile with the large size and the high toughness can be prepared.

The invention discloses an aluminum alloy strip for battery case production and a preparation method thereof, and relates to the technical field of aluminum alloy processing, and the aluminum alloy strip comprises the following components in parts by weight: 75-95 parts of aluminum, 2-4 parts of silicon, 0.35-0.55 part of magnesium, 0.3-0.5 part of manganese, 1.30-1.80 parts of copper, 0.30-0.70 part of zinc, 0.20-0.50 part of titanium, 0.20-0.45 part of strontium, 0.35-0.65 part of rare earth elements and inevitable impurity elements. According to the aluminum alloy strip for producing the battery shell and the preparation method of the aluminum alloy strip, the components of the aluminum alloy are reasonably adjusted, so that the components of the aluminum alloy are more reasonable, and the produced aluminum alloy strip has the characteristics of high strength, high heat dissipation speed and corrosion resistance, can meet the use requirements of a lithium battery, and is good in use effect and high in practicability. Good use prospects are realized.

The invention discloses a jack-fruit-shaped manganese-rich precursor as well as a preparation method and application thereof. The manganese-rich precursor is of a composite multilevel structure, the composite multilevel structure is three-stage particles, the three-stage particles are composed of first-stage particles and second-stage particles jointly, and the second-stage particles are formed by stacking a plurality of first-stage particles and are of a sphere-like structure; the third-stage particles are formed by stacking a plurality of second-stage particles and are of jack-fruit-shaped structures; the specific surface area SSA of the manganese-rich precursor is larger than or equal to 80 and smaller than or equal to 200 m < 2 > / g, and the tap density TD of the manganese-rich precursor is larger than or equal to 1.3 g / cm < 3 >. The manganese-rich precursor has high specific surface area and high tap density at the same time, the change rule that the specific surface area and tap density of the precursor always present opposite changes is broken, and the positive electrode material end prepared from the precursor has higher capacity.

The invention discloses a machining method and application of a high-Cu-content Al-Cu alloy plate. The method comprises the following steps that S1, the high-Cu-content Al-Cu alloy plate is subjected to first-time solution treatment and then quenched; s2, the quenched Al-Cu alloy plate with the high Cu content is subjected to cold deformation; s3, the high-Cu-content Al-Cu alloy plate subjected to cold deformation is heated, subjected to overaging treatment and then subjected to cooling, heat preservation treatment and deformation; and S4, the deformed Al-Cu alloy plate with the high Cu content is subjected to secondary solution treatment, quenching and aging treatment. According to the alloy forming method provided by the invention, the impact resistance of the prepared aluminum alloy material is improved. According to the method provided by the invention, a coarse, hard and brittle second phase in the Al-Cu alloy plate with high Cu content can be refined and spheroidized, and meanwhile, fine equiaxed grains can be obtained, so that the strength, plasticity and toughness of the alloy are improved, and the impact resistance is improved.

The application discloses a preparation method and equipment of a chlorin supermolecular assembly, and belongs to the technical field of functional nanomaterials. The Y+S composite microfluidic chip is designed, the nucleation and growth kinetics of Ce6 molecules are precisely controlled by using the Dean vortex flow induced by the S-shaped flow channel, directional preparation of the nanospherical Ce6 supermolecular assembly is realized, and meanwhile, the assembly has a narrow particle size distribution (PDI<0.1), and the problems of great morphology heterogeneity and poor controllability of the traditional method are completely solved, thereby providing technical support for the morphology standardized preparation of the Ce6-based nanodelivery system.

The invention discloses a method for preparing L-proline through pressurized temperature oscillation crystallization in a water-ethanol system. The method comprises the following steps: adding an ethanol solution with the water content of 5-10v% and an L-proline raw material into a jacketed crystallization kettle, starting pressurizing and online particle size detection equipment, heating and stirring until the L-proline raw material is completely dissolved, and enabling the solution to reach a saturated state; performing linear cooling to 60-65 DEG C, closing a pressurizing valve, opening a crystal slurry tank valve, pressing L-proline crystal slurry into a crystallization kettle, growing the crystal, starting a cooling program, and cooling according to a function T2 (t) = T2i-{(t-120) / t2} 2 * (T2i-T2f), tlt; after 240min, cooling is carried out according to a function T3 (t) = T3i-{(t-240) / t3} 2 * (T3i-T3f), and the temperature is reduced according to 240lt; tlt; the time is 450 to 480 minutes; and when the temperature is reduced to the end point, growing crystals, filtering, washing and drying to obtain a crystallized product. The L-proline product prepared by the method is large in particle size, narrow in particle size distribution and relatively high in bulk density.

The invention discloses a method and device for collaboratively preparing a weld multi-level heterogeneous structure by using dual laser beams, and relates to the field of aluminum alloy material welding. The preparation device comprises an optical fiber laser with a galvanometer system, a short-wave laser, a dual-band composite swing welding head, an optical path system, a robot control system, a cooling system and a protection device. The preparation method comprises: using an optical fiber laser to perform swing filling welding, wherein the weld filling material is an Al-Si-Mg-Cu-Zn-Sn alloy, so as to obtain a weld with a heterogeneous grain structure; at the same time, using a short-wave laser to bake the weld online, so as to promote the composite precipitation of multiple nanophases and to distribute them in a gradient in the depth direction of the weld. By using the device and the method, an aluminum alloy weld with a multi-level heterogeneous structure combination can be prepared, and the comprehensive performance of the weld joint is collaboratively improved, thereby solving the problem of mismatch between the strength and plasticity of the heat-treatable and strengthened aluminum alloy fusion weld.

This invention provides a cobalt tetroxide with a compact inner structure and a loose outer structure, its preparation method, and its application. The preparation method includes the following steps: first, a reaction solution containing seed crystals is prepared; then, a second cobalt-aluminum mixed salt solution and a second precipitant solution are co-flowed into the reaction solution containing seed crystals to perform a crystal growth stage, obtaining a reaction solution containing a first intermediate; subsequently, a salt solution containing doped elements, a third cobalt-aluminum mixed salt solution, and a third precipitant solution are co-flowed into the reaction solution containing the first intermediate to perform a second co-precipitation reaction, obtaining a second intermediate; finally, the intermediate is calcined to obtain the cobalt tetroxide with a compact inner structure and a loose outer structure. This preparation method, by controlling the reaction conditions in stages, obtains a cobalt tetroxide with a compact inner structure and a loose outer structure, meeting the requirements for high tap density, high structural strength, and good conductivity, thereby improving the energy density and electrochemical performance of lithium-ion batteries.

The application relates to the field of high polymer foaming materials, and particularly discloses a preparation method of elastic polypropylene composite foaming beads, the foaming beads and a molded product thereof, and the preparation method of the elastic polypropylene composite foaming beads comprises the following steps: uniformly mixing polypropylene resin, alpha-olefin elastomer and an additive, melt plasticizing, the ratio of the melt mass flow rate of the polypropylene resin to that of the alpha-olefin elastomer being 1:1-3, to obtain a composite; injecting a supercritical fluid, the supercritical fluid accounting for 0.5-3.0 wt% of the total mass of the composite, mixing and melting to obtain a mixed melt; gradiently cooling the mixed melt, then extruding, cutting and drying, then adding a dispersion medium and a foaming agent, impregnating through pressurization and heating, then releasing pressure to foam, washing, drying and curing, to obtain the foaming beads; the molded product is obtained by water vapor heating molding of the foaming beads; and the foaming beads have the advantages of good compatibility and dispersibility, good heat resistance, high expansion ratio, high elasticity and dimensional stability.

The present invention belongs to the technical field of concrete admixtures, and in particular discloses a composite modified pillaring material modified with a hyperbranched quaternary ammonium salt and a preparation method thereof. The composite modified pillaring material uses a hyperbranched quaternary ammonium salt with a specific structure such as a quaternary ammonium salt corresponding to a hyperbranched polyamine shown in Formula I or a hyperbranched quaternary ammonium salt shown in Formula II as a modified material. Since it contains a branched structure, it is different from an ordinary modified material with a long-chain structure, which ensures that the interlayer spacing after intercalation of the orthorhombic pillaring material is larger and the CEC capacity is higher. The present invention also discloses a fluorine-free alkali-free accelerator using the above-mentioned composite modified pillaring material as a stabilizer and a preparation method thereof. The fluorine-free alkali-free accelerator increases the amount of aluminum sulfate used in the fluorine-free alkali-free accelerator by more than 10% compared with the traditional alkali-free accelerator, so that the supersaturation of the accelerator solution system is significantly improved, ensuring its excellent effect in concrete materials.

The invention relates to the technical field of aero-engine part manufacturing, in particular to a forging forming method for an aero-engine fuel pump shell. Comprising the following steps of S1, rough machining, S2, primary forging, S3, secondary forging, S4, secondary treatment, S5, tertiary forging and S6, tertiary treatment. According to the method, cracks and folding defects in the forging treatment process can be effectively removed through three times of forging and post-forging treatment, and the defects of corrosion spots, black spots, abnormal flower spots, peeling, bubbles, bruise and press-in objects can be effectively optimized.