96 results about "Advanced materials" patented technology

The invention belongs to the field of advanced materials, and particularly relates to polyimide resin with low curing temperature and high heat resistance and a preparation method thereof. According to the invention, pararosaniline is introduced into the molecular chain structure of the phenylacetylene-terminated polyimide resin, and the curing temperature of the phenylacetylene-terminated polyimide resin is reduced by changing the spatial distortion degree of the polyimide molecular chain and introducing free radicals to catalyze the curing process. The polyimide resin can be cured and molded at a relatively low temperature, and keeps excellent heat resistance and mechanical properties. The forming temperature of the high-performance polyimide and the composite material thereof is effectively reduced, so that the manufacturing difficulty and cost are reduced, and the preparation method has important application prospects.

The invention provides a phase change enhanced ablation-resistant modified liquid silicone rubber material as well as a preparation method and application thereof, and belongs to the field of advanced materials. According to the invention, paraffin is adopted as a phase change filler, so that the ablation resistance and heat insulation performance of the expanded ceramic liquid silicone rubber material are remarkably improved, and the prepared silicone rubber composite material has the advantages of low density, low ablation surface temperature, strong carbon layer and high heat absorption capacity. The phase-change reinforced modified expanded ceramic flexible ablation-resistant material further improves the ablation resistance and high-temperature heat insulation performance of a liquid silicone rubber material, and has a good application prospect in the fields of aerospace thermal protection, building heat insulation and the like.

The invention provides a continuous annealing process method for cooperatively regulating and controlling the shape of an ultrathin and wide precise foil, and relates to the technical field of advanced material processing frontier. According to the continuous annealing process method for synergistically regulating and controlling the shape of the ultrathin and wide precise foil, micron-sized precise foils with different marks, the specification of 0.02-0.2 mm and the width of more than 600mm are selected for continuous annealing, and the preparation process comprises the following steps: putting a cold-rolled and cleaned ultrathin and wide foil coiled material into a continuous annealing furnace for annealing treatment, and the method can be suitable for regulating and controlling the structure properties and the plate shapes of various ultrathin precise foils. The method can effectively control the abnormal growth of crystal grains, realizes the fine grain structure of the foil, improves the surface quality and the mechanical property of the ultrathin precise foil, fills the technical defects of the plate shape consistency and the structure property of the ultrathin and wide precise foil after annealing, and has positive significance in promoting the development of the key technical industry in China.

The invention provides a graphene oxide and aramid nanofiber hybrid modified chopped fiber reinforced flexible polymer thermal protection material as well as a preparation method and application thereof, and belongs to the field of advanced materials. Aiming at the problems of huge modulus difference, poor interface compatibility and serious stress concentration between fibers and a flexible matrix, a hybrid interface phase composed of graphene oxide and aramid nanofibers is constructed, so that an inert surface microstructure of the chopped fibers is improved, and a multi-scale mechanical interlocking structure is promoted to be formed between the fibers and the flexible matrix; the modulus mismatch between the fiber and a rubber matrix is effectively relieved, and more uniform and efficient stress transfer of an interface area is realized. In the processes of tensile deformation, dynamic loading, high-temperature ablation and the like, the hybrid interface phase can keep tight interface combination between the fibers and the flexible matrix, the ablation anti-scouring performance and mechanical performance of the flexible composite material are remarkably improved, especially the flexible ablation performance in the high-dynamic and deformation state, and the flexible composite material has good application prospects.

The invention discloses a composite coating diaphragm and a preparation method thereof and a secondary battery, the composite coating diaphragm comprises a base membrane and a composite functional coating compounded on the surface of the base membrane, the composite functional coating comprises a first functional coating relatively close to the base membrane and a second functional coating relatively far away from the base membrane, the porosity of the first functional coating is smaller than that of the second functional coating, and the raw material components of the first functional coating comprise modified nanocellulose obtained by double-grafting cis-1, 4-polybutadiene and polyethylene glycol chain segments and gas-phase aluminum oxide. By constructing a diaphragm coating with a gradient pore structure and combining an advanced material modification technology, the composite coating diaphragm integrates high thermal stability, excellent electrolyte wettability and low-temperature adaptability, and can still keep stable structure and interface characteristics under an extreme temperature working condition; therefore, the method has good expandability and industrial application prospects, and is suitable for development and application requirements of high-performance lithium ion batteries and next-generation energy storage devices.

The invention relates to the technical field of laser welding, and discloses a laser welding device for a shock absorber pin, which comprises a mounting bottom plate, a limiting baffle plate, a fixed toothed plate, a rotating gear, a limiting end shock absorber pin, an inserting end shock absorber pin, a laser welder, a clamping assembly, a driving assembly and a circulating assembly, according to the device, through the meshing structure of the circulating assembly and the gear, revolution and autorotation of a workpiece to be welded are conducted synchronously, the laser welding device is driven to move synchronously in cooperation with the driving assembly, laser does not need to surround the workpiece, uniform girth welding can be completed, and welding seams are continuous and regular; the welding precision and connection stability are remarkably improved, advanced material preparation and continuous operation are supported through the circulating layout, workpieces to be welded can be synchronously replaced in the welding process, shutdown waiting is not needed, and meanwhile the production efficiency can be greatly improved.

The utility model discloses a fixture for rotor processing, which relates to the field of industrial equipment processing equipment and comprises a device main body, an open slot is arranged in the device main body in a penetrating manner, a placement plate is arranged at one end of the device main body, an expansion sleeve is movably arranged in the open slot, a limiting block is movably arranged in the expansion sleeve, and the limiting block is movably arranged in the device main body. One end of the inner diameter of the expansion sleeve changes from small to large, a rotating shaft matched with the limiting block is arranged in the expansion sleeve, one end of the rotating shaft is connected with a connecting plate, a placement groove is formed in the end, away from the device body, of the connecting plate, and a control motor matched with the rotating shaft is arranged in the placement groove. By adopting innovative structural design and advanced materials, the machining precision and stability of the rotor are improved. The equipment performance is guaranteed, the defective rate is reduced, the product quality is further improved, waste in production is reduced, the production cost is effectively reduced, and industrial production is promoted to a higher level.

Provided is a sacrificial composition. The sacrificial composition comprises a polymer (A) that undergoes acid-catalyzed decomposition, a compound (B) that generates an acid by heat, and a solvent (C), wherein the compound (B) that generates the acid by heat consists of a carboxylic acid and a base, and a content of the compound (B) is 1 to 60 parts by mass based on 100 parts by mass of the polymer (A). The sacrificial composition may exhibit at least one of properties as an advanced material or as a high performance material. The sacrificial composition may be used in the nanotechnology process to make semiconductor device / display device application, for example semiconductor chip, or a liquid crystal, quantum dot, OLED display fabricated on a substrate controlled by semiconductors.

The invention relates to the technical field of spacecrafts, in particular to a spacecraft defense material and a preparation method thereof, and designs a structure capable of effectively absorbing and dispersing impact energy on microscopic and macroscopic scales by utilizing computer simulation and an advanced material modeling technology. A base material with high strength, high toughness, light weight and corrosion resistance is selected, nanofibers, nanoparticles or nanosheet layers are embedded into the base material by utilizing a nanotechnology so as to enhance the mechanical property and the impact resistance of the base material, and the shape, the structure and the performance of the material are accurately controlled by adopting an advanced manufacturing technology. The prepared materials are stacked, bonded or mechanically connected together to form a final defense structure, and the structure is strictly tested. By combining a nanotechnology, composite material engineering and an additive manufacturing defense material, the deep requirement of a space exploration task is met, and the safety of astronauts and the smooth completion of the task are ensured.

The invention relates to the technical field of advanced materials, integrated circuits and microelectronic devices, and provides an atomic layer Van der Waals heterojunction-based sensing, storage and calculation integrated device and a preparation method thereof. The device comprises a substrate, a first gate electrode, a first two-dimensional Van der Waals alternating magnetic material layer, a second gate electrode, a first two-dimensional Van der Waals ferromagnetic material layer, a two-dimensional Van der Waals insulating material layer, a second two-dimensional Van der Waals ferromagnetic material layer, a third gate electrode and a second two-dimensional Van der Waals alternating magnetic material layer which are sequentially stacked from bottom to top, and a fourth gate electrode and an encapsulation layer. According to the invention, the integration of the sensing of optical signals, the nonvolatile storage of information and the logic calculation function is realized in a single device unit, and the sensing, storage and calculation integrated function of a single device constructed by an atomic layer is realized. On the basis, by combining and interconnecting a plurality of device units, basic logic functions such as an AND gate, an OR gate and a NOT gate can be further realized, and a solid foundation is laid for expanding application scenarios.

This invention relates to a method for testing the fracture toughness of anisotropic eccentrically loaded single-sided notched tensile specimens, comprising: S1, establishing a two-dimensional plane stress model of anisotropic material ESET specimens; S2, mesh generation; S3, calculating displacement, strain, and stress field to obtain the stress intensity factor K and compliance C under different initial crack lengths and anisotropic material parameters; S4, establishing crack length calculation formulas and stress intensity factor calculation formulas based on compliance under different eccentric loading rates, initial crack lengths, and anisotropic material parameters. This invention allows for rapid and accurate measurement of crack length simply by measuring the deformation of the material under external force; it reliably extends the application range of standardized eccentrically loaded single-sided notched tensile specimens from traditional isotropic metals to modern advanced materials such as composite materials, additive manufacturing alloys, and rolled plates, while ensuring the calculation accuracy under anisotropic conditions.

The application provides a poly(dimethyl diphenyl imide) siloxane / phenolic based double network hybrid resin and a preparation method and application thereof, and belongs to the field of advanced material technology. The application firstly provides a copolymer for preparing an ablative thermal protection hybrid resin, and the structure of the copolymer is shown as formula I. Then, the hybrid resin prepared from the copolymer is provided. The copolymer shown as formula I and the phenolic resin in the hybrid resin of the application have good compatibility, and the copolymer is uniformly distributed in the phenolic resin; and the hybrid resin is graphitized and ceramized in the ablative process, and has excellent ablative resistance. The application provides a new idea and method for preparing a new ablative resistant hybrid phenolic resin through copolymerization, and a new ablative resistant hybrid resin which is expected to meet the increasingly severe flight environment in the future is prepared.

This invention relates to a formulation for preparing an optical layer containing a metal oxide. The formulation can exhibit at least one of the properties of an advanced material or a high-performance material. The formulation can be used in nanotechnology processes to fabricate semiconductor device / display applications, such as semiconductor chips, or liquid crystal, quantum dot, and OLED displays fabricated on semiconductor-controlled substrates.

The invention discloses a method for multi-dimensional uniform deformation of a micro-nano structure, belongs to the technical field of advanced material processing and manufacturing, and solves the problems of product structure distortion and out-of-control precision of a nano-scale structure caused by low shrinkage rate and non-uniform sintering process densification in the prior art. The method comprises the following steps: uniformly mixing matrix powder, an activator and a morphology stabilizer to obtain a mixture, and carrying out micro-injection molding on the mixture to obtain a pre-amplified micro-nano structure; performing segmented degreasing on the pre-amplified micro-nano structure, performing gradient sintering, and performing hot isostatic pressing treatment to obtain a multi-dimensional uniformly-deformed micro-nano structure; wherein the matrix powder comprises metal powder and / or ceramic powder, the activating agent is eutectic alloy with the melting point smaller than or equal to 200 DEG C, and the morphology stabilizing agent is rare earth metal oxide and / or transition metal oxide. The invention has the advantages of high shrinkage rate, uniform shrinkage and high mechanical strength.

The application discloses a kind of MEMS device architecture, including cap layer, device layer and substrate layer, cap layer and device layer are bonded, the whole after bonding is bonded with substrate layer, cap layer is manufactured based on first silicon substrate, cavity structure is provided at the bottom of cap layer, high-depth groove structure is provided in cap layer, groove wall of high-depth groove structure is provided with silicon dioxide film, high-depth groove structure is filled with polycrystalline silicon and deposited, the upper surface of first silicon substrate is provided with silicon dioxide layer;Device layer is made based on SOI wafer, including the first silicon structure layer consisting of top layer silicon, buried oxide layer and the second silicon structure layer consisting of back substrate silicon;Substrate layer includes second silicon substrate, bottom cavity is provided on the top surface of second silicon substrate, exhaust hole is opened on the bottom surface of second silicon substrate.The application combines deep groove etching, polycrystalline silicon slot filling and bonding technology, utilizes advanced materials such as SOI wafer and polyimide layer, and realizes excellent signal isolation and flexibility of various MEMS IMU applications.

The application discloses a system and a method for accelerating the degradation of solid nuclear waste, aiming at eliminating radioactive hazards from the root. The system comprises an inner barrier, an intermediate filling layer and an outer barrier. The inner barrier is made of functional parallel nanotube material, the outer barrier is a titanium alloy container, and the intermediate filling layer is nanotube grade graphene powder. The method is to wrap the solid nuclear waste in the inner barrier, assemble it through the intermediate filling layer and the outer barrier, and then store it in a deep geological environment. Through the strong parallel force field created by the inner barrier and the parallel wave particle flow in the environment, the energy is gathered to deconstruct the cross superposition operation state of the basic particles of the nuclear radiation source. The scheme combines advanced material science, photon physics and philosophical thought, realizes the complete elimination of radioactive hazards, provides the possibility for the transformation and reuse of solid nuclear waste, and has environmental protection and innovation.

The application belongs to the field of advanced material technology, and relates to a method for preparing large-size room-temperature ferromagnetic graphene based on stress engineering, ferromagnetic graphene and application thereof. The method is as follows: 3 or more layers of copper-based graphene are folded densely by a mechanical method, and then at least 10 cycles of rapid cooling and heating are performed, and the ferromagnetic graphene is obtained; the process of rapid cooling and heating is as follows: the copper-based graphene after being folded densely is placed in a cold trap environment of 70-120K for cooling, and then is rapidly placed in an environment of room temperature and above for heating. Through the pretreatment method of mechanical folding and continuous rapid cooling and heating, strong and tough ferromagnetic property is observed in large-size graphene (centimeter scale), and the Curie temperature is 100K to room temperature and above. The ferromagnetic graphene in the application is applied to the fields of flexible electronic devices and wearable artificial intelligence.

The application provides a kind of chopped fiber reinforced flexible polymer thermal protection material by graphene oxide and aramid nanofiber hybrid modification and its preparation method and use, belongs to the field of advanced materials.Aiming at the problem that the modulus difference between fiber and flexible matrix is huge, the interface compatibility is poor, and the stress concentration is serious, by constructing the hybrid interface phase composed of graphene oxide and aramid nanofiber, the microstructure of the inert surface of the chopped fiber is improved, the multi-scale mechanical interlocking structure between the fiber and the flexible matrix is promoted, the modulus mismatch between the fiber and the rubber matrix is effectively relieved, and the uniform and efficient stress transfer in the interface area is realized.In the process of tensile deformation, dynamic load and high temperature ablation, the hybrid interface phase can keep the close interface bonding between the fiber and the flexible matrix, significantly improve the ablation and erosion resistance of the flexible composite material and the mechanical properties, especially the flexible ablation performance under high dynamic and deformation state, and has good application prospect.

The present invention relates to a formulation for preparing an optical layer containing a metal oxide. The formulation may exhibit at least one of properties as an advanced material or as a high performance material. The formulation may be used in the nanotechnology process to make semiconductor device / display device application, for example semiconductor chip, or a liquid crystal, quantum dot, OLED display fabricated on a substrate controlled by semiconductors.

The technology described herein is directed towards phase-change material-based (e.g., chalcogenide) radio frequency components that can be used in unit cells of a reconfigurable intelligent surface. A multi-state tunable capacitive element for reconfigurable operation is described, in which phase-change material operates as a switching element to controllably vary capacitance of each unit cell. The multi-state tunable capacitive element can be made of multiple subcircuits in which capacitors of various values can be selectively switched in or out to vary the capacitance of the multi-state tunable capacitive element, resulting in a phase change of a unit cell with respect to reflecting or refracting an electromagnetic wave. By arranging the subcircuits with capacitors of different values, and actuating each one in or out of the overall capacitive element, an analog-like variable capacitor is provided to provide more granular phase shift control of cells of a reconfigurable intelligent surface.

The composition can be used for a negative photosensitive composition, and the composition can exhibit characteristics of at least one advanced material or high-performance material. The compositions may be used in nanotechnology processes to fabricate semiconductor / display devices, such as liquid crystal, quantum dot or OLED displays fabricated on substrates and controlled by semiconductors. A negative-type photosensitive composition comprising (I) a polysiloxane, (II) an acrylic polymer, (III) a compound comprising two or more (meth) acryloyloxy groups, (IV) a polymerization initiator, (V) a thiol compound comprising at least two thiol groups, and (VI) a solvent wherein component (II) has a glass transition temperature of 0 to 60 DEG C.

The invention discloses a pavement repairing composite material and a preparation process and an application process thereof, the pavement repairing composite material provided by the invention comprises an interface agent and a repairing material, the interface agent comprises SBS modified asphalt, water, an emulsifier, a defoaming agent, a stabilizer, an anti-stripping agent and SBR latex; the repairing material comprises single-component glue, aggregate and reinforced fibers, and the two components cooperate to achieve the integrated repairing effect of strong bonding, high bearing, crack resistance and durability. When in use, the asphalt pavement pit slot repairing work can be quickly completed by brushing the interface agent and filling the repairing material. Advanced materials and technologies are adopted for repairing the damaged position of the asphalt pavement, disease aggravation is prevented, it is guaranteed that the repaired pavement is smooth and durable, and the original bearing capacity and driving comfort of the pavement are restored.

The invention relates to the technical field of advanced materials of an integrated circuit packaging COF technology, in particular to a method for inhibiting diffusion plating and skip plating of chemical nickel plating of a superfine circuit of an integrated circuit packaging flexible substrate and application. According to the method, through the systematic synergistic effect of pre-dipping treatment before activation, activation treatment and post-dipping treatment, the uniformity of line activation can be promoted, the deposition rate of nickel plating around the line can be regulated and controlled, diffusion plating and skip plating phenomena caused by non-uniform adsorption amount of palladium on the two sides of the line are improved, nickel plating deposition between fine lines is reduced, and the service life of the line is prolonged. And the problem of nickel bridging of the fine line caused by over-strong palladium activity or palladium residues at intervals of the fine line is avoided. The method has the advantages of being simple in process, easy and convenient to operate, low in production cost and capable of being suitable for large-scale production, and can be well applied to the chemical nickel plating process of the superfine circuit of the flexible substrate with the line width smaller than 12 micrometers and the line width larger than 50 micrometers at the same time.

The utility model discloses a wear-resistant anti-aging vacuum roller, which belongs to the technical field of vacuum rollers and comprises a workbench, a fixing plate fixedly mounted at the top of the workbench, a rotating shaft rotatably mounted in the fixing plate, a vacuum roller body fixedly mounted on the outer side of the rotating shaft, and a mounting shell mounted on the outer side of the vacuum roller body in a sleeving manner. An anti-aging layer is fixedly mounted on the outer side of the mounting shell, a wear-resistant layer is fixedly mounted on the outer side of the anti-aging layer, four sliding frames are slidably mounted in the vacuum roller body, moving blocks are slidably mounted in the four sliding frames, inserting blocks are fixedly mounted on one sides of the four moving blocks, and moving rods are fixedly mounted on the other sides of the four moving blocks. The whole vacuum roller device does not need to be disassembled complexly, the maintenance time is greatly shortened, upgrading and reconstruction of the vacuum roller are facilitated, more advanced materials and technologies are adopted in time, the performance and competitiveness of equipment are improved, large-scale replacement of the whole vacuum roller is not needed, and the cost and difficulty of equipment upgrading are reduced.

This invention relates to the field of petroleum engineering equipment and advanced materials processing technology, specifically to an anti-galling toothed connection structure suitable for titanium alloy oil casing, comprising interlocking female and male threads. Through parametric design of tooth width and groove dimensions, female and male thread angles and tooth heights, the galling phenomenon caused by high temperature and friction during processing is reduced, the risk of stress concentration is lowered, sealing and connection reliability are improved, thread engagement accuracy is guaranteed, and combined with surface treatment processes, the overall sealing and connection strength is enhanced. It is suitable for extreme environments such as deep wells, ultra-deep wells and offshore oil and gas extraction.

The invention belongs to the technical field of titanium-based composite materials, and particularly relates to a multi-component composite material reversely constructed based on machine learning and a design method. The method comprises the following steps: selecting a reinforcement phase which is expected to realize the high-strength and high-plasticity titanium-based composite material from the existing reinforcements, analyzing the reinforcements, the content and the distribution structure which have great influence on the comprehensive mechanical properties of the titanium-based composite material by utilizing a method of combining machine learning with first principle simulation, and obtaining the high-strength and high-plasticity titanium-based composite material according to the obtained result. And a laser additive manufacturing process and a high-energy ball milling process are utilized to prepare a printed piece. According to the method, the data mining capability of machine learning, the theoretical analysis advantages of a first principle and an advanced material preparation process are integrated, and an efficient, scientific and systematic new way is provided for research and development of the titanium-based composite material.

The invention discloses a nickel-rich high-entropy alloy composite material for an extreme high-temperature environment and a preparation method of the nickel-rich high-entropy alloy composite material, and belongs to the technical field of advanced materials and manufacturing. The preparation method comprises the following steps that S1, nickel-rich high-entropy alloy composite powder is provided, and S2, additive manufacturing is conducted through the laser powder bed melting technology, specifically, the spread nickel-rich high-entropy alloy pre-alloyed powder is scanned through a main laser beam so that the nickel-rich high-entropy alloy pre-alloyed powder can be melted and rapidly solidified, a base body blank of an endogenous dual-phase nanometer lamellar sheet interlocking structure can be formed through layer-by-layer printing, and the nickel-rich high-entropy alloy pre-alloyed powder is obtained. The method has the beneficial effects that structure-function integrated manufacturing is achieved, precise forming of a complex component, generation of an internal nanometer strengthening structure and construction of a surface authigenic anti-oxidation functional layer are synchronously completed through the double-laser synergistic additive technology, and the industrial problem of separation of manufacturing and protection is fundamentally solved.

The application discloses a method for improving the strength and toughness of duplex stainless steel based on alternating powder laying in additive manufacturing, and belongs to the field of metal additive manufacturing and advanced material design. In the method, duplex stainless steel powder and austenitic stainless steel powder are respectively laid on different layers for forming through an alternating powder laying strategy. After laser melting and solidification, a composite structural material with alternating arrangement of ferrite and austenite is directly obtained. Meanwhile, the method retains the characteristics of laser powder bed fusion forming materials, i.e. fine grain structure and high density dislocation, and can realize the synergistic improvement of strength and elongation without subsequent heat treatment, with the yield strength being greater than or equal to 700 MPa and the elongation being greater than or equal to 25%, which is significantly higher than the standard value of ASTM 240.

The invention relates to the technical field of petroleum engineering equipment and advanced material processing, in particular to an anti-thread-gluing tooth-shaped connecting structure suitable for a titanium alloy oil casing, which comprises a female end thread and a male end thread which are meshed with each other. The thread gluing phenomenon caused by high temperature and friction during machining is reduced, the stress concentration risk is reduced, the sealing and connecting reliability is improved, the thread meshing precision is guaranteed, the surface treatment technology is combined, the overall sealing and connecting strength is improved, and the joint is suitable for deep wells, ultra-deep wells, offshore oil and gas exploitation and other extreme environments.

The invention discloses a high-entropy material with a grain-precipitated phase dual heterostructure and a preparation method of the high-entropy material, and belongs to the technical field of advanced materials, and a precipitated phase heterostructure part in the grain-precipitated phase dual heterostructure high-entropy material is composed of a nanoscale precipitated phase size and a submicron precipitated phase size. And a nano-scale precipitated phase is beneficial to a dislocation bypassing mechanism, has strength and also has relatively good plasticity. The submicron precipitated phase can effectively hinder dislocation movement, and remarkable strengthening is generated through dislocation accumulation. The preparation method comprises the following three steps: selecting isomeric induction elements; presetting the isomeric induction elements; and stirring, friction and alloying. Gradient element alloying and dynamic recrystallization structure regulation and control are synchronously completed through stirring friction alloying single-step machining. The component-process collaborative strategy has the characteristics of short process and high flux, and the component / structure collaborative optimization complexity is remarkably reduced.