14results about How to "Inhibitory response" patented technology

The invention discloses a polyurea-based gel polymer electrolyte, a synthesis method thereof and application of the polyurea-based gel polymer electrolyte in a lithium battery, and belongs to the technical field of lithium batteries. A mixture containing a polyureido polyalkenyl monomer, an electrolyte and an initiator is subjected to thermal initiation polymerization reaction to obtain the polyureido gel polymer electrolyte, and the polyureido gel polymer electrolyte integrates ureido functional groups, flame-retardant structural units and coordination polar groups and has a covalent cross-linked network and a dynamic hydrogen bond network at the same time. The composite material shows excellent mechanical properties and ion transmission capability, has intrinsic flame-retardant characteristics, and is especially suitable for preparing high-safety gel-state lithium metal batteries, lithium ion batteries and other electrochemical devices.

The present application relates to the field of germanium polycrystal preparation, and specifically discloses a preparation method of high-purity germanium polycrystal, comprising the following steps: S01, using a mixed solution of up-grade HF and ultrapure water to ultrasonically clean a quartz boat, then using ultrapure water to rinse, blow dry and bake to complete the pretreatment of the quartz boat; S02, using a thin film deposition method to deposit 50-100 nm amorphous silicon on the inner wall of the pretreated quartz boat. The present application uses a quartz boat and an amorphous silicon layer on the inner wall of the quartz boat to replace a graphite boat and a carbon coating, completely eliminates carbon pollution, makes the produced high-purity germanium polycrystal C<0.1 ppt, and performs annealing treatment after depositing the amorphous silicon layer, so that high-temperature annealing can densify the amorphous silicon layer, improve the stability of the silicon layer, inhibit the reaction of Ge and SiO2, and reduce impurities.

The invention provides an epitaxial method for improving crystal point defects on the back surface of an epitaxial wafer, and the method mainly comprises the steps: carrying out the epitaxy through employing Poly and LTO in sequence, and carrying out the epitaxy through employing a perforated graphite disc, and obtaining an 8-inch epitaxial wafer. The epitaxial wafer can be used for a power semiconductor device, a photoelectric semiconductor device, a radio frequency and microwave device and a power integrated circuit. The method has the advantages that the perforated graphite disc is used for epitaxy, reaction gas entering the back of the substrate in the epitaxy process can be discharged to the lower part of the reaction chamber along the holes in the surface of the graphite disc, aggregation reaction on the back of the substrate is greatly reduced, and the crystal point defects on the back of the epitaxial wafer are greatly reduced; besides, in the epitaxy process, HCl gas is introduced into the lower end of the graphite plate, the HCl gas enters the back surface of the substrate through holes of the graphite plate to achieve the effect of etching crystal points on the back surface, and meanwhile, the HCl serving as a by-product in the epitaxy process can also achieve the effects of inhibiting the chemical reaction of SiHCl3 and H2 and reducing the generation of crystal point defects on the back surface.

The invention discloses a semi-supervised space-time action detection method, device and equipment based on semantic causal pseudo-mark uncertainty constraint and a storage medium. The method comprises the following steps: firstly, sampling a video to generate a fragment set, and extracting a target bounding box, a target-level spatial-temporal feature and a neighborhood background region feature through a two-dimensional and three-dimensional convolutional neural network; the target-level spatial-temporal features are enhanced through a semantic causal context enhancement module, and an enhanced target-level spatial-temporal feature set is output; unmarked samples are screened through an unmarked sample selection module with uncertainty constraint, and a reliable sample set is output; a pseudo mark calibration module calibrates a pseudo mark and outputs a high-quality pseudo mark set; and finally, outputting an action category probability set by the student model. According to the method, background features can be adaptively weakened, dynamic interference backgrounds can be inhibited, unmarked data can be fully utilized when marked data is limited, the action semantic discrimination capability is enhanced, the data marking cost is reduced, and the problem of balance between the detection efficiency and the cost under the limited marked data is effectively solved.

The invention relates to the field of concrete preparation, in particular to concrete containing sandy slate aggregate and a preparation method of the concrete. The sandy slate aggregate is prepared from the following components in parts by weight: 75 to 100 parts of ordinary Portland cement, 20 to 40 parts of fly ash, 1280 to 1380 parts of sandy slate low-strength aggregate, 300 to 500 parts of medium-strength aggregate, 0.5 to 1.0 part of carboxymethyl hydroxyethyl cellulose, 5 to 10 parts of fine ground gypsum powder, 0.8 to 1.2 parts of polycarboxylate superplasticizer, 0.1 to 0.2 part of air entraining agent and 70 to 110 parts of water. Wherein the granularity index B1 of the sandy slate low-strength aggregate is controlled to be 2.5-2.8, and the shape index S1 of the sandy slate low-strength aggregate is larger than or equal to 0.70. According to the invention, the void ratio is reduced by optimizing the aggregate gradation and the grain shape, and the water consumption and the cementing material consumption are obviously reduced on the premise of ensuring the workability and the strength.

This invention discloses a reinforced separator material for power batteries and its preparation method, belonging to the field of separator material technology. By acid-activating and hydrothermally coating boehmite powder, polydopamine-coated powder is obtained, improving the thermal stability of the powder and the strong bonding force between subsequent slurry components. Then, through ion exchange, zinc-intercalated montmorillonite is obtained, expanding the interlayer spacing to facilitate efficient lithium-ion transport and reduce battery internal resistance. Next, through polar gradient dispersion and high-pressure homogenization, the two are mixed with other components to obtain a premixed slurry. Polyether-modified silicone oil is added to the premixed slurry to obtain a mixed slurry. The mixed slurry is then coated on both sides of a pretreated PE separator and cured in stages to obtain a reinforced separator material for power batteries. This achieves strong interfacial bonding, high mechanical strength, and high thermal stability in the separator material.

The present invention provides a phosphorus pentafluoride purification method, which comprises: introducing a first mixed gas containing phosphorus pentafluoride and impurities into liquid hydrogen fluoride at a flow rate v, and washing at a normal pressure and a temperature T to obtain a second mixed gas containing phosphorus pentafluoride and hydrogen fluoride, wherein the impurities comprise phosphorus oxyfluoride, T is less than or equal to 15 DEG C, and v is more than or equal to 2mL / min and less than or equal to 10mL / min; and separating the second mixed gas to obtain phosphorus pentafluoride. According to the method, impurities in the phosphorus pentafluoride gas can be effectively removed, and the purity and the yield of phosphorus pentafluoride are improved.

The invention relates to an electrical feed-through (10) comprising: a body (20) having at least one through-hole (22) penetrating the body (20); the insulating material (30) is contained in the through hole (22) penetrating through the main body (20), and the insulating material (30) is composed of glass or comprises glass. The electrical feedthrough (10) further comprises at least one electrical conductor (40) extending through the insulating material (30) housed in the through hole (22), where the body (20) comprises titanium or a titanium alloy. The electrical feedthrough (10) is characterized in that the glass is a specific lanthanum borate glass containing an alkaline earth metal oxide, having improved hydrolytic stability and thus can withstand harsh conditions of multiple autoclaves. The insulation resistance of the feedthrough comprising the glass is at least 1 * 10 < 9 > Omega after 300 autoclave operations.

The invention provides a layered oxide material with a nanometer woven net interface structure and a preparation method and application thereof, and belongs to the field of electrode materials, a dilute acid solution is used as a reaction medium, and a spray pyrolysis mode is combined to enable dilute acid to fully react with a residual alkali compound on the surface of layered oxide, so that the layered oxide material is obtained. And synchronously converting into a uniform nano woven net interface structure in situ. A uniform nano interface structure can be prepared, belongs to a flexible film structure and has a relatively strong bonding effect, and the interface structure can persistently and stably exist in a charging and discharging process, so that the structural strain is reduced; the nano woven net interface structure has a relatively large specific surface area, so that the contact area and the liquid retention amount of the layered oxide material and an electrolyte are increased, and the diffusion of Li < + > and the migration of electrons are accelerated; the uniform knitted net interface structure can inhibit the surface oxidation of the material and the reaction with water and carbon dioxide in the air, improve the air tolerance of the matrix material, and also can greatly inhibit the erosion effect of the electrolyte on the matrix material.

The present disclosure relates to a power system source side carbon emission prediction method and system, the method comprising: collecting multi-source data; data preprocessing of the collected multi-source data, the data preprocessing comprising data alignment, outlier processing and normalization processing; based on wavelet decomposition method and compressed sensing reconstruction algorithm, time-frequency expansion is performed on the multi-source data after data preprocessing to obtain a high-resolution wavelet coefficient matrix; the high-resolution wavelet coefficient matrix is high-resolution time-frequency data; based on the multi-scale physical properties of carbon emission and the high-resolution wavelet coefficient matrix, enhanced data are generated which conform to the physical law and cover various scenarios; based on the resolution branch design, precise feature screening is performed on the enhanced data to obtain a plurality of high-resolution branch prediction sequence matrices and output; all branch prediction sequence matrices are respectively reconstructed into corresponding time-frequency features through inverse wavelet transform, and each time-frequency feature is fused based on a preset attention mechanism to obtain a carbon emission prediction value.

The application discloses a lithium battery cell with a composite diaphragm and a preparation method thereof, and relates to the technical field of lithium batteries. The base film is prepared by blending melamine formaldehyde resin prepolymer and cellulose and simultaneously introducing functional nanoparticles through spinning. The adsorption capacity of the diaphragm to electrolyte is improved by increasing the density of the polar functional groups of the base film. Then, the base film is laminated with a flexible graphene oxide film to improve the electrolyte retention rate and safety of the battery. The porous structure of the carbon base film screens lithium ions, and its electronic insulation avoids electronic leakage. In addition, the physical barrier of the nanoparticles and the chelation of nitrogen elements in melamine further improve the cycle performance of the battery.

This invention discloses a semiconductor device and its fabrication method. It provides a semiconductor substrate with a conductive structure. On the semiconductor substrate, a plug connected to the conductive structure is fabricated above it. An impregnation layer, which is an intermetallic compound, is formed on the surface of the semiconductor substrate with the plug. The intermetallic compound contains a metal wire element, an anti-electromigration metal element, and a bonding metal element. An upper metal layer containing the metal wire element is formed above the impregnation layer. The impregnation layer and the upper metal layer are patterned to obtain interconnects connecting the conductive structure. This invention enables the formation of a uniformly thick impregnation layer and upper metal layer, thereby improving reliability in areas such as electromigration and stress migration, and ensuring the quality of semiconductor products.

The application discloses a composite crucible for smelting aluminum-lithium alloy and a preparation method thereof. The composite crucible is composed of an outer heat-resistant cast steel layer, a middle carbon fiber felt layer and an inner silicon carbide ceramic layer. The heat-resistant cast steel is one of ZG40Cr24Si2, ZG50Cr28Ni48W5 and ZG35Cr24Ni7NRE. The middle layer is a carbon fiber felt with a porosity of 30-70% prepared from mesophase pitch-based carbon fibers. The silicon carbide ceramic layer is composed of 85-90% silicon carbide, 5-8% SiO2 and 2-10% mullite. The preparation process of the crucible is simple. The main body of the crucible does not react with lithium, thereby ensuring the quality of the melt. The multi-layer structure makes it easier to replace and repair the damaged crucible, thereby prolonging the service life of the crucible. Meanwhile, the crucible is convenient to transfer and will not crack during the smelting process.