470 results about "Bi layered" patented technology

The invention provides a double-layer carbon-coated lithium iron phosphate composite material as well as a preparation method and application thereof. The double-layer carbon-coated lithium iron phosphate composite material comprises lithium iron phosphate and a carbon coating layer coating the surface of the lithium iron phosphate, the carbon coating layer comprises a first carbon coating layer and a second carbon coating layer, the ID / IG of the first carbon coating layer is smaller than that of the second carbon coating layer, the ID / IG of the second carbon coating layer is smaller than that of the first carbon coating layer, and the ID / IG of the second carbon coating layer is smaller than that of the second carbon coating layer. ID / IG refers to a peak intensity ratio of a D peak to a G peak in Raman spectra of the first carbon coating layer and the second carbon coating layer. According to the double-layer carbon coated lithium iron phosphate composite material provided by the invention, the conductivity of lithium iron phosphate and the wettability of an electrolyte are improved, and the rate capability and the low-temperature performance of a battery are improved.

The invention relates to the field of photoelectrocatalysis, and provides a preparation method and application of a cerium-based double-layer composite material coated with indium zinc sulfide, and the preparation method comprises the following steps: dispersing Ce (IV)-MOF in DMF and methanol, adding a hydroxyl-containing organic ligand, carrying out room temperature ultrasonic treatment to obtain modified MOF, dispersing the modified MOF in water and glycerin, adding a zinc salt and an indium salt, stirring, adding thioacetamide, stirring, filtering, washing, and drying to obtain the cerium-based double-layer composite material coated with indium zinc sulfide. And heating to obtain the product indium zinc sulfide coated cerium-based double-layer composite material. According to the invention, an ultrasonic-assisted MOF ligand exchange technology is utilized, so that an MOF regular octahedral framework structure is well maintained; the ZnIn2S4 material is compounded through in-situ growth of ZnIn2S4, the compounding synthesis temperature and a solution system are optimized, a ZnIn2S4 double-layer coating structure is obtained, and the yield and dispersity of ZnIn2S4 are improved. And the prepared ZnIn2S4 / MOF composite material has excellent reaction efficiency and stability of photoelectrocatalytic hydrogen production.

The invention relates to the technical field of pressure forming, in particular to a skin drawing and liquid filling composite forming method for a double-layer plate of a double-curvature part, and aims to solve the problems that according to an existing aircraft skin forming process, the part is broken and wrinkled, the surface quality is poor, and the part with the complex shape and the large curvature change is difficult to manufacture. The method comprises the following steps that double-layer plate materials comprise a first plate material and a second plate material which are made of different materials; skin stretching forming is conducted, specifically, the double-layer plate is placed on a skin stretching forming die to be subjected to skin stretching forming; and liquid filling forming is conducted, specifically, the double-layer plate obtained after surface drawing forming is placed in a bulging mold, liquid is injected for pressurization, and therefore the first plate forms a final part. The friction maintaining effect between the second plate and the first plate is utilized, the plasticity of the second plate is larger than that of the first plate, deformation of the first plate is more sufficient, the forming limit of a part formed by the first plate is improved, and the problems that the part is broken, wrinkled, poor in surface quality, difficult to manufacture and the like are solved.

The invention is applied to the technical field of composite aluminum foils, and discloses a preparation method of a double-layer composite aluminum foil. The preparation method of the composite aluminum foil comprises the following steps: 1, preparing the following raw materials in parts by weight: 35-45 parts of a monofunctional thermocuring oligomer, 55-75 parts of a water-borne epoxy resin oligomer, 4-8 parts of nano boron nitride, 2-4 parts of hollow glass beads, 0.8-2.5 parts of a thermal initiator and 2-4 parts of a nonionic emulsifier. According to the preparation method of the double-layer composite aluminum foil, the nano boron nitride and the hollow glass beads are adopted, the nano boron nitride has high thermal conductivity and can be better combined with other materials after organic modification, the overall thermal conductivity is improved, the hollow glass beads are subjected to a special preparation process, silane coupling agent modified carbon nanotubes are introduced, and the thermal conductivity of the aluminum foil is improved. And due to the synergistic effect with the nano boron nitride, the composite aluminum foil has an efficient heat conduction effect.

The invention relates to a multilayer double-gradient nanopore resin-based composite material with strong interlayer bonding and a preparation method thereof, and the preparation method comprises the following steps: injecting first high-porosity nanopore resin into a first low-volume-density fiber preform to obtain a first low-density layer; surface tension weakening treatment is conducted on the first low-density layer, then a second low-volume-density fiber prefabricated body is laid on the first low-density layer, second high-porosity nanopore resin is injected, and a double-layer double-gradient nanopore resin-based composite material with strong interlayer combination is obtained; and surface tension weakening, glue injection, curing and drying treatment are cyclically carried out, the nanopore resin with the residual porosity decreasing progressively is injected into the residual fiber prefabricated body with the residual volume density increasing progressively, and finally the multilayer double-gradient nanopore resin-based composite material with strong interlayer combination is prepared. Compared with the prior art, the overall density of the material is reduced, and meanwhile the ablation resistance and the heat insulation performance of the material are improved.

The invention relates to the technical field of busbars, and discloses a multi-layer composite fire-resistant shielding busbar and a preparation method thereof, and the multi-layer composite fire-resistant shielding busbar comprises a conductor layer, a fire-resistant layer, a shielding layer and a sheath layer which are sequentially coated from inside to outside; wherein the conductor layer is made of copper or aluminum; the fireproof layer wraps the conductor layer and is formed by wrapping a double-layer PI three-in-one synthetic mica tape. According to the multi-layer composite fire-resistant shielding busbar and the preparation method thereof, the double-layer PI three-in-one synthetic mica tape is used for wrapping, a stable fire-resistant insulation structure is formed outside the conductor layer in a reverse wrapping mode that the first layer is clockwise and the second layer is anticlockwise, and the mica tape is formed by combining phlogopite paper and an organic silicon resin adhesive capable of resisting the temperature of 300 DEG C; the structural integrity can be maintained under the fire high-temperature condition, and electrical short circuit caused by thermal failure is effectively prevented; and meanwhile, the mica tape adhesive layer permeates into the micro-groove structure arranged on the surface of the conductor in the thermocuring process, so that the mechanical occlusion strength is further enhanced.

The utility model discloses a reinforced double-layer buffering angle bead, and relates to the technical field of packaging products. Comprising a corner protector body, the corner protector body comprises an inner side wall, an outer side wall and a cavity formed between the inner side wall and the outer side wall, the inner side wall and the outer side wall are each provided with a plurality of criss-cross grooves, the grooves are segmented and obliquely deepened towards the cavity in an arch arc shape, and the intersection point of every two adjacent grooves is deepest sunken. And the intersection points of the grooves in the inner side wall and the outer side wall correspond to each other and are mutually connected to form supporting points. The plurality of arch-shaped grooves are connected together in the cavity to form a framework-like structure, a gap space can be formed to meet the requirement that gas can smoothly flow in the material pipe in the blow molding process, and the wall surfaces of the inner side wall and the outer side wall can be supported by a plurality of supporting points, so that the wall surfaces can be prevented from collapsing, and the service life of the material pipe is prolonged. The whole large-area wall surface is divided into a plurality of buffer units by the grooves, so that the strength of the wall surface is greatly improved.

The invention relates to the technical field of aluminum matrix composites, in particular to a double-layer composite wire and a method for manufacturing a high-performance aluminum matrix composite through electromagnetic field regulation and control additive manufacturing of the double-layer composite wire. (2) the additive manufacturing process is regulated and controlled through a three-axis electromagnetic field; and (3) carrying out post-treatment on the prepared aluminum-based composite material. The Al-Ti-B alloy at the core provides an ideal reaction environment for in-situ generation of a TiB2 nanophase, and the Al-Cu-Mg alloy at the shell provides solid solution strengthening elements for a matrix. The layered design not only realizes the spatial separation of the reinforcing phase and the solid solution strengthening element, but also creates conditions for the synergistic effect of two strengthening mechanisms. And secondly, a powerful tool is provided for accurate control over behaviors of the molten pool through introduction of the three-axis electromagnetic field regulation and control technology. The magnetic field intensity and the frequency are independently regulated in the x direction, the y direction and the z direction, and multi-dimensional regulation of flowing, heat transfer and solidification behaviors of the molten pool can be achieved.

The invention discloses a one-step forming preparation method of a light carbon-based composite material (C / CA) surface gradient ultra-high temperature ceramic (UHTC) composite coating, and belongs to the technical field of carbon-based composite material oxidation resistance. According to the invention, a silicon (Si)-silicon dioxide (SiO2) co-cementation ceramization technology is adopted, and a pre-coating layer on a C / CA substrate and a carbon matrix of a C / CA shallow surface layer can be synchronously ceramized through one-time high-temperature heat treatment process and are respectively converted into a compact UHTC-SiC outer layer and a gradient SiC inner layer (i.e., a SiC / UHTC-SiC double-layer composite coating). According to the preparation process, the double-layer coating containing the ultra-high-temperature ceramic can be obtained only through one-time heat treatment, the influence of high temperature on a carbon matrix pore structure and the crystallization degree in C / CA is remarkably reduced, and meanwhile deformation mismatching between the coating and a substrate is relieved. The outer layer of the obtained coating is a SiO2-filled compact UHTC-SiC layer, the inner layer of the obtained coating is a relatively compact gradient SiC layer, the total thickness reaches 500 microns or above, the residual stress is low, and the weight loss of C / CA under the protection of the coating is only 4% after the C / CA is oxidized at 1500 DEG C for 30 h.

The invention discloses a construction method and application of a gradient metallurgical composite interface between ZTA ceramic particles and an alloy steel matrix. The preparation method comprises the following steps: firstly, preparing Zr-Fe alloy powder and ZTA micro powder into slurry by using ethanol, coating the surfaces of ZTA particles with the slurry, and pre-sintering to obtain ZTA particles with Zr-Fe-ZTA coating layers; the preparation method comprises the following steps: preparing a Zr-Fe-ZTA coating layer, soaking the ZTA particles with the Zr-Fe-ZTA coating layer in slurry prepared from Zr-Fe alloy powder, alloy steel powder and ethanol to realize secondary coating on the surfaces of the ZTA particles, and finally performing pressureless sintering to prepare the ZTA ceramic preform. Due to the bridge action of double-layer coating of the Zr-Fe-ZTA and the Zr-Fe-alloy steel powder, a metallurgical bonding interface is formed between ZTA ceramic and alloy steel, so that the impact abrasive wear resistance of the ZTA ceramic particle reinforced alloy steel composite material is greatly improved, and the ZTA ceramic particle reinforced alloy steel composite material can be applied to preparation and production of the ZTA ceramic particle reinforced alloy steel composite material.

The invention provides a multilayer composite barrier film and a preparation method thereof. The multi-layer composite barrier film comprises a middle coating, a plating layer and polyethylene glycol terephthalate layers arranged on the upper side and the lower side of the middle coating respectively, and the middle coating is composed of an inorganic plating layer, a barrier coating layer and a bonding layer. The preparation method is simple in process, the cooking performance and the mechanical performance of the middle layer can be improved through the double-layer polyethylene glycol terephthalate layer, and the bonding performance with the PET layer can be improved while the barrier performance is improved through the bonding layer; the inorganic plating layer and the barrier coating layer have the significance of providing good barrier performance, and the multi-layer composite barrier film has good water vapor / oxygen barrier performance and good thermal stability, transparency and mechanical performance.

The invention relates to the technical field of ceramic materials, in particular to high-purity yttrium oxide transparent ceramic and a preparation method thereof. The preparation method comprises the following steps: ball-milling yttrium oxide powder, a sintering aid and a solvent in a ball-milling device containing a ball-milling medium; stirring the ball-milled slurry by adopting a double-layer four-inclined-blade type stirring rod with a magnetic adsorption effect; sequentially drying and sieving the stirred slurry; and finally, calcining, forming, sintering, annealing and processing to obtain the yttrium oxide transparent ceramic. The double-layer four-inclined-blade type stirring rod with the magnetic adsorption effect is used for stirring the ball-milled slurry, so that the occurrence of impurity iron points in the yttrium oxide ceramic finished product is effectively avoided, and the yttrium oxide transparent ceramic with high optical quality is obtained. Meanwhile, an axial flow type fluid field can be formed to the maximum extent through the double-layer four-inclined-blade type, the shearing, crushing and dispersing effects are achieved, the ball milling time can be shortened, and the production efficiency can be improved.

This invention discloses a two-color injection molding process for Tritan material, belonging to the field of injection molding technology, which solves the problem of easy delamination and fusion lines in two-layer injection molding of the same Tritan material. The injection mold used in this process includes a male mold, a first injection mold, and a second injection mold. The workpiece includes a transparent inner layer and a transparent outer layer. The steps include: S1. Injecting molten Tritan raw material into the first injection mold heated to 100-130°C to form a transparent inner layer; S2. Cooling the first injection mold to 35-50°C, after mold opening, the transparent inner layer remains in the male mold and rotates 180 degrees to close with the second injection mold, so that the residual temperature of the transparent inner layer is maintained at 35-50°C; S3. Injecting molten Tritan raw material into the second injection mold heated to 100-130°C to form a transparent outer layer on the outer wall of the transparent inner layer; S4. Cooling and solidification; S5. Demolding. This invention achieves molecular chain diffusion and entanglement at the interface of inner and outer layer materials by precisely controlling the temperature of two injection molding processes, resulting in a product with strong interlayer bonding, high transparency, and rich visual effects in a single molding process.

The utility model discloses a portable assembly type laminated slab two-layer stand column. The portable assembly type laminated slab two-layer stand column comprises a supporting base and a column body. A column body is mounted at the top of the supporting base, a top plate is mounted at the top end of the column body, a supporting seat is mounted at the top of the top plate, and H-shaped steel is arranged at the inner bottom of the supporting base; the supporting base, the column body, the top plate and the supporting base are used in cooperation, the supporting base is clamped on the outer side of H-shaped steel, the column body supports the top plate at the top end and the supporting base, a worker can continuously stack the laminated slabs towards the top of the top plate and the top of the supporting base, the number of placing layers is increased, space resources are utilized, and an original single layer is changed into double layers; and the number of stacking layers is also increased, the occupied space is reduced, and then workers can use the stacking device conveniently.

This invention provides a method, system, device, and medium for simulating the spin transport properties of multiferroic materials, belonging to the field of materials simulation and computation technology. The simulation method for multiferroic materials includes: geometrically optimizing the structure of an asymmetric low-dimensional multiferroic material based on first-principles calculations to obtain its ground-state structure; determining the physical property parameters of the asymmetric low-dimensional multiferroic material based on the ground-state structure; constructing a two-layer system architecture with multiple polarization stacking modes for the asymmetric low-dimensional multiferroic material based on the ground-state structure; and calculating the spin transport properties of each two-layer system architecture to obtain the spin transport-related characteristic curves of the asymmetric low-dimensional multiferroic material. This invention significantly improves the simulation accuracy of spin transport properties through the synergy of high-precision ground-state modeling and multi-polarization configuration construction.

The utility model discloses double-layer laminated glass and relates to the technical field of glass. The double-layer laminated glass comprises a laminated glass body, a sleeve seat and a positioning base, the sleeve seat and the positioning base are arranged on the outer side of the laminated glass body, a first rubber ring is movably clamped in the sleeve seat, a second rubber ring is movably clamped in the positioning base, and a locking mechanism is arranged between the sleeve seat and the positioning base. According to the double-layer laminated glass, loading of the laminated glass body is convenient through the sleeve base, the positioning base and the locking mechanism, the laminated glass body is protected through the sleeve base and the positioning base, sealing and buffering of the laminated glass body are achieved through the first rubber ring and the second rubber ring, and when the first rubber ring and the second rubber ring are aged, the first rubber ring and the second rubber ring are sealed and buffered. And the first rubber ring and the second rubber ring can be conveniently and rapidly replaced and maintained, so that the device is easy to maintain, and the use requirements are met.

The utility model relates to the technical field of aluminum foil tape compounding, in particular to double-layer aluminum foil tape compounding equipment which comprises a compounding equipment body, the upper side of the compounding equipment body is fixedly connected with a first U-shaped seat and a second U-shaped seat respectively, the inner side face of the first U-shaped seat is rotationally connected with two movable shaft seats, and winding rollers are clamped in the two movable shaft seats. Aluminum foil on the unwinding roller and the winding roller can be rapidly fed or discharged in a clamping mode, other tools are not needed to fix an aluminum foil belt on the composite equipment, time and labor are saved, and therefore the composite efficiency of the composite equipment is improved; the two aluminum foil belts can be compounded through the two compounding rollers, the two aluminum foil belts can be bonded together so as to complete compounding of the double-layer aluminum foil belts, then the limiting circular ring can play a role in limiting and rolling, and the compounded double-layer aluminum foil belts are not prone to wrinkling.

The utility model relates to a multifunctional splicing type honeycomb carton assembly which comprises two sealing covers which are arranged up and down, four side plates which are connected end to end are arranged between the two sealing covers, baffles are integrally formed on the four side end faces of the two sealing covers in a bending mode respectively, the baffles correspond to the side plates, meanwhile, a matching plate is arranged on the side, away from the baffles, of each side plate, and the matching plates are matched with the baffles. The four matching plates are connected end to end to form a rectangular structure, so that a certain gap is formed between the baffle and the side plate in practice, a user can fill corresponding functional materials such as fireproof materials and moisture-proof materials in the gap according to storage requirements, and diversified storage requirements are met by matching the double-layer honeycomb paperboard structure with the functional materials.

The present invention relates to a composite material comprising a) at least one elastomer, and b) an amount equal to or greater than 30% by weight, relative to the total weight of said composite material, of type 3A zeolite in which the cationic sites are occupied by the potassium cation, the sodium cation, at least one alkaline earth metal cation from column IIA of the periodic table and the hydronium ion.The invention also relates to the use of said composite material as an adsorbent material, for the production of master batches, for packaging and for the production of double-glazing.

The invention discloses a high-stability rectifier bridge module assembly process. The high-stability rectifier bridge module assembly process comprises the following steps: step 1, preparing components; 2, fixing the electrode and the heat dissipation substrate; step 3, mounting an insulating part; 4, arranging and connecting the diodes; step 5, coating of a sealing coating; step 6, performing surface treatment on the heat dissipation substrate; 7, assembling and fixing the frame; the silicon nitride-based composite material is adopted as the heat dissipation substrate, compared with a traditional metal cooling fin, the heat conductivity and the insulation performance of the material are excellent, heat can be rapidly conducted in high-power operation, local overheating is prevented, and the high-temperature resistance of the module is improved; the heat dissipation substrate composite material can quickly lead out internal heat, the service life of the module is effectively prolonged, it is ensured that the module stably works in a high-temperature environment, and the shock resistance of the module is remarkably improved through the design of a double-layer buffering structure.

The invention relates to a device and process for pit bottom piping plugging. The device comprises a grouting pipe, a grouting system and a bag section. The bag section is fixed on the grouting pipe through a flange and is 5m away from the bottom end of the grouting pipe; the grouting pipe is connected with a grouting system, the bag section is of a double-layer composite structure, the outer layer is a high-strength polyester woven layer, and the lining is a butyl rubber sealing film; the outer diameter of the bag section in the folded state is 20-30 mm, the bag section is evenly expanded to 300-500 mm after grouting, the channel wall is extruded after expansion, and fast-setting grout is prevented from flowing upwards. The method is suitable for the pit bottom piping of the ultra-deep foundation pit, and is particularly suitable for the pit bottom piping working condition with the leakage amount larger than 10 m < 3 > / h.

The application discloses a soft and dry double-layer composite material, which comprises a bottom layer and a surface layer arranged on the upper portion of the bottom layer, wherein the surface layer has an upper surface and a lower surface, the surface layer is provided with an opening penetrating through the surface layer, the bottom layer is provided with a first protruding portion protruding upward, the first protruding portion penetrates through the opening, the top surface of the first protruding portion is higher than the plane where the upper surface of the surface layer is located, and the fiber fineness of the bottom layer is smaller than that of the surface layer. The application can provide a good soft and comfortable experience for users and improve the dryness of the material.

This invention discloses a lightweight sound-absorbing building material, its preparation method, and its application in ceiling components, relating to the field of lightweight building materials technology. The lightweight sound-absorbing building material of this invention consists of a porous plate and a glaze layer on the surface of the porous plate. The glaze layer is formed by spraying glaze onto the surface of the porous plate; the porous plate is formed by sintering a plate-forming composition; the plate-forming composition includes the following raw materials: waste foamed ceramic powder, diatomaceous earth, hollow glass microspheres, cellulose nanocrystals, bilayer fibers, a foaming agent, and an ethanol solution of polyethyleneimine. The core-shell structure bilayer fibers introduced in this invention, with a mesoporous barium titanate-silica composite phase as the core and an MXene-graphene composite phase as the shell, effectively improve the material's sound absorption and noise reduction capabilities; the introduction of hollow glass microspheres and cellulose nanocrystals further enhances the material's lightweight properties, flexural strength, and sound absorption and noise reduction capabilities. Therefore, this invention has broader application prospects.

The invention discloses a method for improving the thickness uniformity of a composite material based on a VARI technology, and relates to the technical field of composite material liquid forming. Comprising the following steps that a prefabricated part is laid on the surface of a tool, the surface of the prefabricated part is sequentially covered with demolding cloth and a flow guide net, and a composite body is formed; an inner-layer sealing bag is adopted to wrap the composite body and is connected with the glue injection pipe and the glue outlet pipe, and an inner bag packaging body is formed; after a breathable layer is laid on the periphery of the inner bag packaging body, the outer layer sealing bag is adopted for wrapping, a double-layer bag packaging body is formed, and the outer layer sealing bag is provided with an air outlet; the double-layer bag packaging body is vacuumized until the prefabricated part is compacted and the thickness is stable, and a compacted prefabricated part is obtained; measuring the net glue injection pressure range of the compacted prefabricated part without springback in thickness; and on the basis of the net glue injection pressure range, the net glue injection pressure is adjusted, glue is injected into the compacted prefabricated part till no bubble is discharged from the resin flowing out of the glue outlet pipe, and then the composite material product is obtained after curing. The defects of air holes and poor glue in the composite material can be avoided, the thickness rebound of the local area of the prefabricated part in the glue injection process is avoided, and the thickness uniformity of the composite material is good.

The high-performance double-layer material energy-saving sliding plate brick comprises a working material layer, a non-working material layer, an iron shell, a fire clay layer, a casting hole and a coating layer, the working material layer and the non-working material layer are compounded to form a sliding plate brick body, the iron shell is fixedly connected with the body through the fire clay layer, the casting hole penetrates through the body and the iron shell, and the coating layer is arranged on the surface of the body. The side, away from the iron shell, of the cast hole and the body is a working material layer, the non-working material layer is tightly attached to the iron shell, and the coating layer is arranged on the surface of the working material layer. The invention aims to provide the high-performance double-layer material energy-saving sliding plate brick which is long in service life, can utilize the waste corundum recycled material, saves resources, reduces the cost and does not affect the overall performance, and the preparation method thereof.

The invention discloses an efficient and precise construction method for a double-layer hyperbolic metal roof based on BIM. The efficient and precise construction method comprises the steps that a double-layer metal roof BIM overall model is constructed; a datum control line of the roof bearing and supporting assembly is determined; according to the reference control line, the roof bearing and supporting assembly is positioned and installed; and the roof aluminum plate is subjected to wire arrangement positioning and installation, a joint area of the installed roof aluminum plate is glued, and finally the constructed roof aluminum plate is checked and accepted. According to the method, the loss rate of main materials and the labor input can be reduced, joints between the plates are reduced, and the overall waterproof and wind uplift-resistant performance of the roof enclosure structure is guaranteed.

The invention belongs to the technical field of coatings, and particularly relates to a refractory coating and a preparation method thereof, a refractory coating and a preparation method thereof, and a double-layer composite pipe with a flat inner surface. The fireproof coating comprises a component A, a component B and a component C, the component C is prepared from the following raw materials in parts by weight: 55-100 parts of functional filler and 1-2 parts of coupling agent; wherein the functional filler comprises an ammonium phosphomolybdate coated UIO-66 composite material and further comprises at least one of mica powder, glass flakes, silicon dioxide powder and aluminum oxide powder. According to the fireproof coating provided by the invention, the raw materials comprise the functional filler of the ammonium phosphomolybdate-coated UIO-66 composite material, so that the fireproof performance, the antistatic performance and the impact resistance of the coating can be improved.