23results about How to "Improve structural uniformity" patented technology

The invention discloses a composite regulation and control method for improving the performance of a laser additive manufacturing high-strength aluminum alloy, and relates to the technical field of laser additive manufacturing high-strength aluminum alloy materials, micron-sized ceramic particles and micron-sized AlMgScZr alloy powder are mixed, and ceramic particle reinforced aluminum-based composite powder is prepared. According to the composite material powder, the solidification structure is regulated and controlled through the characteristics of ceramic particles, stress concentration is reduced, and meanwhile the reinforcing phase particle aggregation phenomenon is avoided. The obtained composite material is excellent in quality and few in metallurgical defects in laser forming, and the density reaches up to 99.8% or above. By combining the optimized selective laser melting and heat treatment process, the room-temperature mechanical property of the prepared composite material part is remarkably improved, the tensile strength exceeds 540 MPa, the yield strength exceeds 490 MPa, and the elongation at break exceeds 10%.

The application relates to a surface enhanced Raman scattering (SERS) substrate, a preparation method and application thereof, and belongs to the technical field of Raman spectrum detection. The substrate comprises, from bottom to top, a substrate layer, a distributed Bragg reflector, a chalcogen phase change material functional layer and a nanoscale metal structure layer. The distributed Bragg reflector is composed of a periodic structure stack of medium materials with different refractive indexes. The distributed Bragg reflector is coupled with the nanoscale metal structure layer to excite a Tamm state. The chalcogen phase change material functional layer can realize reversible regulation of amorphous state and crystalline state under external light excitation, changes the Tamm state resonance wavelength to regulate the SERS enhancement effect. The application realizes high-sensitivity detection through double enhancement of the Tamm state and localized surface plasmon resonance, has the characteristics of non-volatility, reconfigurability, high reproducibility and design flexibility, is convenient to operate, stable in performance, and is suitable for fields of chemical biological sensing, laboratory chip systems and optical encryption.

The invention relates to a wet spinning preparation process of protein modified polyacrylonitrile fibers, and relates to the field of wet spinning preparation processes, the wet spinning preparation process comprises the following steps: S1, heating and softening a spinning stock solution, dropwise adding a protein solution, and fully dissolving to obtain a clear and transparent protein modified spinning solution; s2, the protein modified spinning solution is sequentially subjected to filtering, defoaming, spinning, coagulating bath and drafting, and then the protein modified polyacrylonitrile fiber is obtained; the spinning stock solution is an acrylonitrile-methyl acrylate-itaconic acid ternary copolymerized stock solution. The acrylonitrile-methyl acrylate-itaconic acid ternary copolymerized stock solution is adopted as a spinning matrix, the compatibility with natural protein is improved by introducing a polar group, and the protein is uniformly dispersed at a molecular level in cooperation with a mode of dropwise adding the protein solution after heating and softening, so that the protein agglomeration phenomenon is remarkably reduced, and the uniformity of the internal structure of the fiber is improved.

The present application relates to the technical field of silicone rubber material, in particular to a sericite modified silicone rubber material and a preparation method thereof.The present application overcomes the problems of poor dispersion of sericite in the organic silicon matrix and poor compatibility of fluorosilicon and common silicon.The silicone rubber material is prepared from polysiloxane hybrid base glue prepared by in-situ polymerization of fluorine-containing / ethenyl double modified sericite, fluorosilicon raw rubber, methylphenylvinyl silicone rubber, MQ silicone resin, hydrogen-containing silicone oil and vulcanizing agent;the preparation process involves double functional group grafting on the surface of sericite, monomer in-situ ring-opening polymerization coating, multiphase blending to build interpenetrating network and hydrogen-containing silicone oil chain extension to cooperate with gradient vulcanization, through building a rigid-flexible stereo enhanced network, the material is endowed with excellent oil resistance, heat resistance and high mechanical strength, and can be used in the field of automobile manufacturing.

The invention relates to a device and a method for tightly and efficiently arranging composite glass fibers, the device comprises a plate arranging mold, multifilament fibers are placed in the plate arranging mold, the plate arranging mold is placed on an electromagnetic vibration table, and the electromagnetic vibration table is connected with a controller. And a magnifying lens connected with the display screen is arranged above the plate arranging mold. The method comprises the steps that multifilament fibers are put into a plate arranging mold for blank plate arrangement, a controller is started when 4-6 layers are arranged every time, an electromagnetic vibration table is made to vibrate, the plate arranging mold is driven to vibrate up and down at the set frequency and amplitude for preset time, the multifilament fibers are vibrated at a certain frequency, the position is adjusted, and a close packing state is achieved; and the blank plate structure is displayed in real time through a display screen connected with the magnifying lens, after the current blank plate structure is adjusted, the controller is turned off, and the multifilament fiber row plate continues to be placed in. By means of the arrangement device and method, the phenomena of multifilament fiber dislocation and structure holing can be reduced, the internal cleanliness of the blank plate is improved, and the plate discharging efficiency is improved.

The application discloses an alumina-coated aramid core-shell fiber / epoxy resin composite medium and a preparation method and application thereof, and belongs to the technical field of polymer composite media and electrical insulation materials. The application solves the problems of insufficient heat conduction performance of existing epoxy resin, easy agglomeration of traditional inorganic fillers, weak interface bonding between aramid fibers and resin, and difficult balance between heat conduction performance improvement and breakdown performance maintenance. The application constructs an alumina coating layer on the surface of aramid fibers through a precursor deposition-thermal conversion method, and then is modified by a coupling agent, and is compounded with an epoxy resin, a curing agent and an accelerator, and is subjected to vacuum degassing and gradient curing to obtain a high-heat-conduction insulation epoxy resin composite medium. The application has the advantages of simple preparation process, easily available raw materials and controllable cost, and the obtained composite medium has heat conduction performance, electrical insulation performance and mechanical performance, and can be widely applied to the fields of electronic packaging, transformer pouring insulation, high-voltage insulation components and new energy motor insulation systems.

This invention discloses a stacking and encapsulation module, a stacking and encapsulation machine, and a method thereof. The stacking and encapsulation module and machine include a machine base and a feeding mechanism, a stacking mechanism, a film encapsulation mechanism, an adhesive tape application mechanism, and a transfer and positioning mechanism mounted on the machine base. The feeding mechanism automatically feeds the electrode sheets and separator and precisely positions them on all four sides. The stacking mechanism alternately stacks the positive and negative electrode sheets and separator and has a separator alignment function. The film encapsulation mechanism achieves uniform film encapsulation of the battery cell through synchronous rotation. The adhesive tape application mechanism uses constant pressure adhesive application and indexing rotation to complete multi-sided edge sealing. The transfer and positioning mechanism achieves three-sided centering positioning of the battery cell. The encapsulation method includes feeding and positioning, alternating stacking, rotating film encapsulation, constant pressure adhesive application, and transfer and positioning steps. This invention features high integration, high positioning accuracy, stable operation, and high automation, significantly improving battery cell quality and production efficiency, and is suitable for large-scale production of form-fit lithium batteries.

This invention relates to the field of polyether material preparation, and provides a low-foaming block copolymer ether and its preparation method. The method involves reacting a hydroxyl-terminated polyoxyethylene-polyoxypropylene block copolymer with propyltriethoxysilane isocyanate, followed by hydrolysis-condensation to construct a block copolymer ether with siloxane-containing nanoclusters at the end groups. By controlling the number-average molecular weight of the polyether backbone, the content of ethylene glycol oxy units, the content of propylene glycol oxy units, the amount of silane introduced, the degree of hydrolysis-condensation, and the average particle size of the siloxane nanoclusters, low initial foam height, low 5-minute foam height, suitable cloud point, and low residue are achieved. This solves the problem of simultaneously achieving persistent low foaming with low viscosity, a wide processing window, structural uniformity, water solubility, and compatibility stability, and has good industrial application value.

The utility model relates to foundry technology field especially relates to a vertical directional glass casting mould, it contains four identical size L type cast iron unit, L type cast iron unit is set up as cast iron piece of right angle bending. L type cast iron unit is through end point butt joint or overlapping nested and is pasted and constitutes the mould with longitudinal cavity to make glass liquid can flow in the height direction of pouring opening based on mould. The technical scheme presented in the application not only significantly improves the quality and efficiency of glass casting, but also reduces defects, improves the yield and performance of products. These improvements not only improve the overall quality of the product, but also provide a more reliable material basis for subsequent processing and application, with wide application prospect and significant economic benefits.

The application relates to the technical field of inorganic non-metallic materials, and discloses a high-entropy oxide ceramic and a solid-phase reaction preparation method thereof; the high-entropy oxide ceramic is prepared by using multiple rare earth oxides, alkaline earth metal oxides and transition metal oxides with a purity of greater than or equal to 99.99% as raw materials, through the following steps of raw material pretreatment, chemical stoichiometric ratio batching, wet ball milling mixing, pre-sintering, secondary ball milling, composite forming, internal stress release, normal-pressure sintering densification and the like, and the high-entropy oxide ceramic bulk body with a single-phase solid solution structure, high density and stable performance is prepared. The process route of the application is simple and controllable, the raw material cost is low, no complex equipment is needed, the generation of multiple-component system heterogeneous phases can be effectively inhibited, the powder component uniformity is excellent, the prepared ceramic bulk body has high density, is suitable for large-scale industrial production, and can be widely applied to the fields of electronic information, aerospace, energy catalysis, heat protection and the like.

The present invention discloses a method for preparing high-strength and tough carbon aerogel composite materials through the fiber softening effect, which belongs to the field of new lightweight carbon-based composite materials. This method replaces the traditional "rigid" fiber reinforcement with polyacrylonitrile precursor, and utilizes the characteristics of rich surface active groups of polyacrylonitrile precursor to realize polymerization reaction between the precursor surface and the resin solution in the process of high-pressure environment assisted phase separation, thereby forming a good chemical bonding interface between the fiber / matrix. Utilizing the characteristics of the polyacrylonitrile precursor that softens and deforms when heated, the free shrinkage of the resin matrix during the carbonization process can be realized, thereby effectively reducing the residual stress inside the composite material, and fundamentally solving the common problems of matrix cracking and interface debonding. The carbon aerogel composite material prepared by the above method has the characteristics of small residual stress, high toughness, high strength and good thermal insulation performance.

A Ni-BiVO4 / g-C3N4 gas sensing material, wherein the Ni-BiVO4 / g-C3N4 gas sensing material is a polyhedral structure, the particle size is about 100-300nm, and g-C3N4 is attached to the surface of the polyhedral structure, and the surface is rough. The Ni-BiVO4 / g-C3N4 gas sensing material in the present invention has a narrow bandgap width, a large specific surface area of ​​17.64cm2 / g, excellent selectivity for triethylamine, a sensitivity of 25.2 at a triethylamine concentration of 30ppm, a minimum detection limit of 55.7ppb, a fast response / recovery time, a response / recovery of 39s / 32s at a triethylamine concentration of 30ppm, and good repeatability and stability.

The invention belongs to the technical field of fabrics, and particularly relates to a color-retaining and multi-color production process of a yarn-dyed heavy-twist leno fabric. The process comprises the following steps: dyeing yarns in various colors to enable dye to permeate into fibers, humidifying the yarns, performing heavy twisting processing, and forming a tension buffer area through yarn supply adjustment in the heavy twisting process to reduce tension fluctuation; multi-color yarns are woven through double warp beams, so that the tension difference of different yarns is controlled; and carrying out refining treatment on the woven fabric. Through the synergistic effect of the process steps, the color stability and the multicolor effect consistency of the fabric are improved, and meanwhile the stability in the production process is improved.

This invention discloses a nano-modified composite grouting material suitable for deep, high-temperature geothermal environments and its preparation method, belonging to the field of geotechnical engineering technology. The raw materials for preparing this composite material include: cement, fly ash, cellulose nanofibers, Pluronic F-127 dispersant, calcium formate, tannic acid, borax, defoamer, and water; wherein the mass ratio of tannic acid, calcium formate, and borax is (0.15-0.25):(1.1-1.4):(0.1-0.2). This invention, through the compounding of specific admixtures, effectively overcomes the defects of traditional grouting materials, such as rapid setting at high temperatures and poor rheological properties. The resulting composite material exhibits low viscosity, long pumpability, and high early strength in high-temperature environments, significantly improving the reinforcement effect on deep, high-temperature rock masses and providing a high-performance, high-reliability grouting solution for deep underground engineering.

The application provides a doped and repaired regenerated lithium nickel cobalt manganese oxide ternary material, a preparation method and application thereof, and belongs to the field of resource recycling science and engineering. The preparation method comprises the following steps: sequentially performing alkali washing and impurity removal and low-temperature pre-burning on waste lithium nickel cobalt manganese oxide material to obtain an activated material; mixing the activated material with a first lithium source, and performing one-time lithium supplement sintering to obtain one-time lithium supplement regenerated material; mixing the one-time lithium supplement regenerated material with a second lithium source and a lanthanide compound, and performing secondary sintering to obtain the doped and repaired regenerated lithium nickel cobalt manganese oxide ternary material. The application adopts a synergistic repair process of "alkali washing and impurity removal-low-temperature pre-burning-step-by-step lithium supplement-lanthanide element doping", does not need to use corrosive reagents and complex separation steps, and has the advantages of simple process, low energy consumption and green environmental protection. The obtained regenerated material restores the layered crystal structure, and when used as a lithium ion battery positive electrode material, has excellent cycle stability and rate performance.

The invention specifically discloses a functional current collector with low residual stress and a preparation method and application thereof. The invention discloses a functional current collector with low residual stress. The functional current collector comprises two metal layers and a polymer layer arranged between the two metal layers, wherein the range from the surface of the polymer layer to the 2-3 [mu] m far away from the metal layer in the polymer layer is marked as a region A, the range from the surface of the metal layer close to the polymer layer to the 100 nm far away from the polymer layer in the metal layer is marked as a region B, and the region A and the region B are junction regions of the polymer layer and the metal layer; the functional current collector contains nitrogen ions, and the concentration of the nitrogen ions in the junction region of the polymer layer and the metal layer accounts for more than 80% of the total concentration of the nitrogen ions in the functional current collector. The method has the advantages that the residual stress of the functional current collector is weakened, the stability of the functional current collector is improved, the cycle life of the battery is prolonged, and the safety performance is improved.

The utility model belongs to the technical field of building foundation structures, and particularly relates to a laminated steel mesh strip-shaped foundation structure suitable for an assembly type rural house strip-shaped foundation. Comprising a necessary bearing platform, a foundation wall, embedded ribs and optional foundation beams. The bearing platform is composed of a first steel wire net frame and in-cavity concrete. The first steel wire net frame comprises a steel wire net, inserting wires, an edge sealing net film and reinforcing ribs. The foundation wall is composed of a second steel wire net frame, a heat preservation plate and in-cavity concrete. The second steel wire net frame comprises a main reinforcement net, a disassembly-free net film, a second inserting wire and a positioning clamping piece. The embedded ribs are longitudinally arranged in the foundation wall, and the upper ends of the embedded ribs are exposed. The problems that an existing foundation is tedious in construction, long in period, high in thermal bridge effect and poor in structural integrity are solved, formwork-free rapid construction is achieved through the prefabricated steel wire net frame, the thermal bridge effect is reduced through the heat preservation plates, the structural strength and durability are improved through cooperation of multiple components, the foundation beams can be selectively arranged according to the foundation conditions, and the construction efficiency is improved. And the method has remarkable practicability and economical efficiency.

The application discloses a carbon fiber front machine cover decoration piece forming die and a forming method, and relates to the technical field of carbon fiber forming die and forming method. The forming base is sequentially provided with two independent sealing cavities from inside to outside; the two independent sealing cavities are respectively an independent part forming vacuum cavity and a buffer pressure stabilizing vacuum cavity; the differential pressure linkage control mechanism matches the rheological characteristics of carbon fiber prepreg resin, and independently controls vacuumizing, pressure maintaining and pressure releasing of the part forming vacuum cavity and the buffer pressure stabilizing vacuum cavity according to forming process stages, so as to adapt to the forming process of differential pressure exhaust, temperature control compaction and segmented curing. The whole forming die and process can be completely adapted to conventional ordinary oven equipment, and the dependence on high-end autoclave equipment is abandoned. Meanwhile, through structural innovation and process fine control, the short board of poor quality and low yield of traditional oven forming process is solved, and high-precision and low-defect forming effect under low-cost production conditions is realized.

The application discloses a composite current collector and a vertical graphite directional deposition method and application of a copper foil surface of the composite current collector. The method comprises the following steps: preparing a (111) single crystal copper foil, evaporating an island-shaped nano copper transition layer, and adopting a two-stage PECVD process to form a planar buffer layer at low power and then to excite vertical growth at high power, and combining pulse gas supply and spectrum monitoring to realize accurate thickness control. The prepared composite current collector has a structure of "single crystal copper foil / planar graphene buffer layer / vertical graphene", the interface resistance is less than 60 Ω, and the contact angle is greater than 125°, and the composite current collector is suitable for fields of lithium ion battery current collectors, heat-conducting interface materials and field emission devices.

The invention discloses a low-loss organic ice micro-nano optical fiber and a preparation method thereof.The preparation method comprises the steps that two standard quartz single-mode optical fibers are arranged at intervals along the same straight line, a gap is formed between the ends, close to each other, of the two standard quartz single-mode optical fibers to serve as a sample preparation area, and the temperature of the sample preparation area is adjusted to be close to the glass-transition temperature of organic liquid; and at a temperature slightly higher than the glass transition temperature of the organic liquid, stretching the organic liquid dropwise added in the sample preparation area at a constant speed, thereby preparing the high-quality one-dimensional organic ice micro-nano optical fiber. The organic ice micro-nano optical fiber prepared by the method disclosed by the invention is smooth in surface, good in diameter uniformity, adjustable in diameter and uniform region length, capable of realizing low-loss ground wave guide and good in mechanical property, provides a new platform for researching the physical and chemical properties of organic matter micromolecules and expanding the application of the organic matter micromolecules as a functional material, and has a wide application prospect. The method has great research and practical values in the fields of physical chemistry, material science, life science, universe exploration and the like.

This disclosure relates to a method and system for preparing an alkaline slag-calcium sulfate composite activated product, belonging to the field of carbon fixation material preparation technology. The method includes: firstly, differentially mechanically activating alkaline slag and calcium sulfate to obtain pretreated powder; then, performing microwave-chemical coupling activation treatment; and finally, intermittent ultrasonic dynamic aging to obtain a precursor for carbon fixation filling materials. The system includes a dual-cavity graded ball mill module, a microwave-chemical coupling activation module, and an ultrasonic dynamic aging module connected in sequence. This application significantly improves the system's reactivity and structural uniformity through multi-stage synergistic activation, effectively solving technical defects such as salting out and cracking, and can greatly improve the carbon fixation rate and long-term mechanical strength, realizing the high-value utilization of bulk industrial solid waste and efficient carbon dioxide sequestration. This application has a simple process, low energy consumption, and strong controllability, and is suitable for large-scale industrial applications of carbon fixation filling in mines.

The embodiment of the application provides a solid electrolyte with a multi-layer coating structure, a solid electrolyte preparation method and a battery. The solid electrolyte with the multi-layer coating structure comprises: a core, a first coating layer coated on the surface of the core, and a second coating layer coated on the surface of the first coating layer. The chemical general formula of the core is Li 6‑a PS 5‑a X 1+a The chemical general formula of the first coating layer is Li (2+b‑3c) M c OX b The chemical formula of the second coating layer is B2O3. Wherein, X is at least one of F, Cl, Br and I, M is at least two of Al, La, Cr, Y, Yb, Gd and Ga, the value range of a is 0<=a<=2, the value range of b is 1<=b<=7, and the value range of c is 0.5<=c<=3. The solid electrolyte with the multi-layer coating structure does not need to be subjected to secondary refinement treatment, and the ion conductivity is improved.

The invention relates to the technical field of intraocular lens growth, and discloses an intelligent regulation and control system for large-scale production forming of a cubic zirconia material. Comprising a central cooperative control module, a partition cooling data monitoring module, a contact thermal resistance liquid level analysis module, a vertical temperature gradient construction module and an induction energy dynamic matching module, and the partition cooling data monitoring module, the contact thermal resistance liquid level analysis module, the vertical temperature gradient construction module and the induction energy dynamic matching module are connected through a bus. The vertical temperature gradient construction module constructs a vertical heat flow channel by adjusting the flow velocity difference of cooling water on the side wall and the bottom. The induction energy dynamic matching module dynamically adjusts the radio frequency output power according to the liquid level height; the central cooperative control module overall plans the whole process of raw material melting, crystal growth and annealing shutdown according to thermodynamic characteristics. The technical problems that the liquid level of the high-temperature melt is difficult to monitor and the thermal field is difficult to control are solved, automatic closed-loop control over crystal growth is achieved, and the structural uniformity and the yield of large-size single crystals are remarkably improved.