28 results about "Carbon contamination" patented technology

The application belongs to the technical field of rare earth metallurgy, and discloses a method for preparing rare earth metal by electrolyzing molten salt. The method comprises the following steps: taking rare earth oxide as electrolytic raw material, and performing electrolysis in molten salt electrolyte under a protective atmosphere; and collecting the deposit after electrolysis, so that the rare earth metal is obtained. Through the synergistic effect of multi-dimensional process, the application successfully constructs an efficient, green and stable rare earth metal electrolysis preparation system. The system completely eliminates carbon pollution, significantly improves the stability of the electrolysis process and the quality of the product, realizes efficient and stable preparation of high-purity rare earth metal, and can meet the stringent requirements of high-end electronics, aerospace, high-performance permanent magnet materials and other fields for ultra-high-purity rare earth products.

The invention provides a carbon combustion flue gas pollutant treatment device, and belongs to the field of separation treatment equipment.The carbon combustion flue gas pollutant treatment device specifically comprises a bearing barrel, a fixing disc, a cleaning frame and a lifting shaft, and the bearing barrel is in butt joint with a smoke exhaust pipeline; the fixing disc is connected with the bearing cylinder, and the inner space of the bearing cylinder is divided into an upper area and a lower area. The cleaning frame is used for scraping pollutants on the inner wall of the smoke exhaust pipeline and carrying the pollutants; the lifting shaft is movably connected with the fixed disc, and the lower end is fixed on the cleaning frame; in the vertical moving process of the lifting shaft, the cleaning frame is driven to vertically move, and meanwhile the cleaning frame is made to rotate; compared with the prior art, the cleaning frame and the fixing disc are connected through the lifting shaft, the cleaning frame can be rotated by controlling movement of the lifting shaft, carbon deposition pollutants on the inner wall of the smoke exhaust pipeline are cleaned through the cleaning frame, the carbon deposition pollutants are driven to vertically move, the cover plate is arranged below the fixing disc, and the cover plate is arranged below the fixing disc. After the cover plate is matched with the cleaning assembly, the carbon deposition pollutants are crushed into small particles, and the small-particle pollutants are discharged along with the flue gas.

The present application relates to the technical field of liquid phase epitaxy growth of thin film materials, and particularly to a vertical liquid phase epitaxy graphite boat and a method for epitaxy using the same. The graphite boat comprises a sample holder, a stirring rod, a stirring base, and a crucible. The graphite boat can improve the uniformity of epitaxial materials, reduce surface defects, reduce the epitaxial composition and thickness difference caused by the inhomogeneity of the mother liquor, and avoid the melting of the surface layer of the substrate at high temperature in the mother liquor, which causes the change of the composition of the mother liquor. While ensuring the uniformity of the epitaxial thickness and composition, the epitaxial carbon contamination defects can be effectively reduced, and the batch yield can be effectively improved.

The application provides a high-density magnesium oxide target material and a preparation method and application thereof, and belongs to the technical field of new material manufacturing and application. The application obtains a slurry by mixing a magnesium source powder raw material, a solvent and a functional additive and then sand grinding; then the slurry is pressure grouted and pressure-kept to obtain a target material blank; finally, the target material blank is sequentially subjected to drying treatment, degreasing and sintering to obtain a high-density magnesium oxide ceramic target material. In the preparation process, no sintering additive is used, and no hot pressing method is adopted, so that the problem of insufficient purity caused by the sintering additive and carbon pollution is solved, the degreasing and sintering steps are combined to simplify the preparation process, the preparation process is performed under normal pressure, the cost and operation difficulty are reduced, and the application is suitable for industrial production.

Catalyst assisted chemical etching of semiconductor substrate can achieve extreme aspect ratio (better than 1000:1), reproducibility and controlled etching quality for submicron feature size in the direction perpendicular to the substrate. The current patterning methods of the catalyst layer suffer of carbon contamination that affects the etching quality and limits the high-resolution pattern transfer in the semiconductor substrate for high aspect ratio etching. The present method allows to use semiconductor standard manufacturing processes to realize carbon-free pattern of catalyst layer by a physical separation with an interlayer material between the catalyst and the polymeric resist used in common lithographic methods. The present method allows to realize controlled predefined nanostructures with high resolution, high fidelity and high throughput yield during the catalyst assisted chemical etching of silicon for X-ray optics nanofabrication.

An optical measurement mark for an imaging system includes a reflective region and a substructure configured to reduce an intensity of an image of the optical measurement mark formed by the imaging system. The substructure can effectively reduce the rate of carbon contamination that may occur when measuring using the optical measurement mark.

The invention discloses a carbon dioxide pollution resistant filtrate reducer for water-based drilling fluid and a preparation method thereof, and belongs to the technical field of filtrate reducers for water-based drilling fluid. The preparation method comprises the following steps: sequentially dissolving monomers N 'N-dimethylacrylamide, sodium p-styrenesulfonate, dimethyl diallyl ammonium chloride, N-vinyl pyrrolidone and 2-acrylamide-2-methylpropanesulfonic acid in a molar ratio of 5: (3-8): (1-5): (0-4): (1-6) in a solvent, adding an alkali solution to adjust the pH value, heating, adding an initiator, drying, and crushing to obtain the filtrate reducer. The filtrate reducer for the water-based drilling fluid has strong competitive adsorption capacity with carbonate and bicarbonate, can improve the performance of the drilling fluid, increase the carbon dioxide containing threshold value and reduce the risk that the filtration performance is out of control after the drilling fluid is polluted by carbon dioxide, and is suitable for improving the formula of the filtrate reducer for the water-based drilling fluid.

The invention relates to a device (1) for ion beam processing of an optical component (2), in particular an optical component (2) for semiconductor technology, comprising: a housing (8) having a processing space (7) for receiving the optical component (2), and an irradiation device (3) designed to generate an ion beam (4) for ion beam processing a surface (2a) of the optical component (2). The device (1) has a UV cleaning device (14) for generating UV light (16) for at least partially removing contaminants (13), in particular carbon contamination, from the surface (2a) of the optical component (2). The invention also relates to a method for at least partially removing contamination (13) from a surface (2a) of an optical component (2) arranged in such a device (1).

The invention relates to the technical field of titanium tetrachloride, and provides a vanadium removal reagent for removing vanadium impurities in titanium tetrachloride and a use method of the vanadium removal reagent, the vanadium removal reagent is prepared from the following components in percentage by mass: 20-60% of anthracene compounds, 1-10% of phenanthrene compounds, 5-20% of pyrene compounds, 10-30% of thiophene compounds and 10-30% of naphthalene compounds, the sum of the mass percentages of all the components is 100%, and the vanadium removal reagent is used for reacting with vanadium oxychloride in titanium tetrachloride to remove vanadium impurities. According to the scheme, the defects that the vanadium removal efficiency is low, the speed is low, dangerous reagents are used and secondary carbon pollution is introduced in a traditional process are overcome, and the purity of the obtained titanium tetrachloride product completely meets the strict application requirements in the high-end field.

To provide a method for evaluating a substrate, a substrate evaluation device, and a substrate evaluation system capable of evaluating the degree of contamination caused by carbon.SOLUTION: In the method for evaluating a substrate, Raman spectra are acquired at a plurality of locations within an evaluation region, which is at least a part of a substrate. For each of the plurality of locations, the intensity of a spectral peak derived from carbon included in the acquired Raman spectrum is calculated. Among the plurality of locations, the number NA of locations where the intensity of the spectral peak derived from carbon is equal to or greater than a threshold value is calculated.SELECTED DRAWING: Figure 4

A method for removing carbon contamination from a silicon carbide chip includes: providing a substrate having opposing first and second surfaces; forming a device layer on the first surface of the substrate, the device layer having a source doped region; forming an interlayer dielectric layer on the source doped region; etching the interlayer dielectric layer to expose the surface of the source doped region, forming a contact hole; forming a first metal layer at the bottom of the contact hole; heat-treating the first metal layer and the source doped region to form a first ohmic contact layer and a first carbon contamination layer on the surface of the first ohmic contact layer; and performing a plasma gas cleaning operation to remove the first carbon contamination layer. Since the plasma gas cleaning operation is a dry removal method, specifically involving low-energy ion bombardment to remove the first carbon contamination layer, it can remove the first carbon contamination layer while avoiding damage to the first ohmic contact layer at the bottom of the first carbon contamination layer and the surface of the source doped region, thereby improving the electrical performance and reliability of the silicon carbide chip.

The invention relates to the technical field of big data, in particular to a low-carbon transportation feedback control system and method based on big data evaluation, and aims to predict carbon emission diffusion of each position on a path based on vehicles corresponding to each path, speed limiting conditions and driving habits of a driver. The method comprises the following steps: performing carbon emission absorption prediction analysis on each position of a road according to environmental conditions, growth conditions and dense conditions of plants on two sides of the road at each position and a carbon emission diffusion diagram, and performing vehicle road matching analysis according to a carbon emission prediction result of each position on a path and a carbon emission absorption prediction analysis result of each position of the road. In combination with carbon emission characteristic analysis and position carbon absorption characteristic analysis, the carbon pollution condition of each alternative path in the driving process is comprehensively evaluated, and the environmental protection property in the vehicle driving process is improved.

A sewage treatment system for treating high-nitrogen wastewater comprises a pretreatment unit, a denitrification adjusting area, a granular sludge reaction area, a sludge-water separation unit and a water outlet unit which are communicated in sequence, and the sludge-water separation unit is further connected with a sludge discharge unit; the pretreatment unit is used for removing suspended solids and large-particle impurities in the wastewater; the denitrification adjusting area is used for adjusting the dissolved oxygen concentration of the wastewater to enable the proportion of nitrogen in the wastewater to meet the aerobic treatment requirement; the granular sludge reaction zone is used for removing nitrogen and carbon pollutants in the wastewater in a high dissolved oxygen environment and promoting the formation of granular sludge; the sludge-water separation unit is used for separating granular sludge and treated supernate, and returning the separated sludge to the denitrification adjusting area; the sludge discharge unit is used for discharging residual sludge in the system; and the water outlet unit is used for discharging the treated supernate. A denitrification adjusting area is arranged in a sewage treatment system, so that the nitrogen proportion and the dissolved oxygen concentration in wastewater are accurately adjusted, and the operation conditions of a subsequent granular sludge reaction area are optimized.

The invention relates to the technical field of environmental pollution statistics and prediction, in particular to a carbon pollution fusion list mapping method, which dynamically simulates the activity level based on future resident energy consumption, industrial energy consumption and industrial process emission, and realizes a prediction list with consistent caliber. By constructing a carbon and pollutant fusion list mapping system, the emission factor construction and fusion list generation capability is provided for a carbon-pollutant collaborative emission reduction research scene. The method supports the mapping and dynamic prediction of a multi-source emission list, can output a long-term emission sequence on a provincial scale, achieves the dynamic coupling simulation of the whole process of energy supply and demand-emission-pollution-health, and carries out the prediction of a future emission list.

The invention discloses a directional controllable growth method of high-purity polycrystalline silicon, which relates to the technical field of material science and engineering, and comprises the following steps: realizing impurity atomic-scale control and non-contact smelting through a four-order synergistic process, performing electromagnetic suspension melting on industrial silicon materials in an inert coating crucible (1420-1450 DEG C, less than or equal to), separating melt from the inner wall of the crucible, and thoroughly blocking an oxygen-carbon pollution source; plasma targeted impurity removal is conducted, specifically, pulse plasma beams (50-200 W / cm, 10-30 min) with the ratio of 4: 1 are adopted for bombarding the surface of the melt, and boron and phosphorus impurities are removed through in-situ gasification; magnetic field coupling directional solidification is conducted, the axial temperature gradient is controlled to be 30-50 DEG C / cm, the solidification rate is controlled to be 0.5-2 cm / h, a transverse alternating magnetic field (0.1-0.5 T, 5-20 Hz) is overlaid to inhibit dendritic crystal deflection, and impurities are driven to be enriched towards the top; and 10-15% of an enrichment layer at the top is cut off, so that a high-purity silicon ingot with oxygen less than or equal to 0.1 ppm, carbon less than or equal to 0.1 ppm and boron phosphorus less than or equal to 0.05 ppb is obtained, and the standard of a 3nm chip substrate is met.

The invention discloses a method for reducing carbon deposition of a transmission electron microscope sample, and belongs to the technical field of analytical testing. According to the method, the polar organic solvent and the porous material are synergistically cleaned for the first time, and combined treatment of drying and secondary cleaning is performed, so that organic matter residues and ligand material residues on the surface of the colloidal nanoparticle sample and the carrier net can be efficiently and thoroughly removed; therefore, the carbon deposition phenomenon in the observation process of the transmission electron microscope is obviously reduced. The method disclosed by the invention is simple and rapid to operate, low in cost, safe and environment-friendly, not only greatly improves the image contrast and resolution and the accuracy of the energy spectrum, but also can effectively avoid false or wrong analysis caused by carbon pollution, and is suitable for high-quality transmission electron microscope characterization of various nanoparticles and samples with similar properties.

The application provides an anti-carbon dioxide pollution water-based drilling fluid viscosity reducer and a preparation method and application thereof, and belongs to the technical field of drilling fluid treating agents. The anti-carbon dioxide pollution water-based drilling fluid viscosity reducer is prepared from the following raw materials in parts by mass: 0.5-1 parts of acrylic acid, 7-10 parts of 2-acrylamido-2-methylpropane sulfonic acid, 5-8 parts of acryloyloxyethyl trimethyl ammonium chloride, 50-80 parts of ethylene glycol monovinyl polyethylene glycol ether, 0.04-0.08 parts of an oxidizing agent, 0.05-0.07 parts of a reducing agent, 0.03-0.06 parts of a chain transfer agent and 130-180 parts of water. The viscosity reducer prepared by the application has excellent viscosity reduction performance in the drilling fluid, especially has a remarkable resistance to CO2 pollution, effectively reduces the apparent viscosity, plastic viscosity and dynamic shear force of the drilling fluid system, significantly improves the drilling efficiency, and is suitable for high-temperature and high-pressure complex formation environments.

The application provides a drilling fluid anti-carbon dioxide pollution diluent and a preparation method and application thereof. The drilling fluid anti-carbon dioxide pollution diluent is prepared from the following raw materials in parts by mass: 10-20 parts of acrylic acid (AA), 5-15 parts of sodium p-styrenesulfonate (SSS), 1-5 parts of N-vinylpyrrolidone (NVP), 45-55 parts of isoamyl alcohol polyoxyethylene ether, 0.01-0.1 parts of an initiator, and 100-140 parts of water. The diluent can solve the problems of thickening of the drilling fluid, increase of the viscosity and shear force, and increase of the filtration loss after CO2 pollution, and is applied to the CO2-polluted drilling fluid, so that the viscosity and shear force of the CO2-polluted drilling fluid can be effectively reduced, and the filtration loss of the drilling fluid can be reduced.

This invention discloses a SiC substrate MOCVD gallium oxide epitaxial wafer, belonging to the field of wide-bandgap semiconductor epitaxial material preparation technology. The epitaxial wafer comprises, from bottom to top, a silicon carbide substrate, a β-Ga2O3 carbon getter layer, and a β-Ga2O3 drift layer. The carbon concentration ratio of the β-Ga2O3 carbon getter layer to the β-Ga2O3 drift layer is not less than 100, forming a decreasing carbon concentration gradient. The β-Ga2O3 drift layer contains periodically distributed annealing repair interfaces. The preparation method employs a precursor spatiotemporal separation alternating gas supply mode to grow the β-Ga2O3 drift layer, with periodic insertion of in-situ flash annealing steps. A three-stage carbon purification mechanism synergistically removes carbon from three stages: carbon source generation, defect complex formation, and cumulative stabilization, solving the technical bottleneck of uncontrollable carrier compensation ratio caused by organometallic precursor carbon contamination during MOCVD growth of ultra-thick drift layers.

The invention discloses a preparation method for producing a high-precision complex casting shell mold by using an evanescent mode, which is realized by the following steps of: (1) manufacturing a mold by using EPS (Expandable Polystyrene), foaming by using an aluminum mold during batch production, and manually cutting in single piece or small batch production; (2) the surface of the white mold is coated with a fireproof coating of 1.0-3.5 mm; (3) the EPS is melted and recycled at the low temperature of 200-300 DEG C; (4) sintering the demolded shell mold at 600-800 DEG C for 5-10 hours; (5) pouring the shell mold in a negative pressure molding box; and (6) the casting is cleaned after heat preservation. The method combines the advantages of lost foam casting and shell mold casting, solves the problems of carbon pollution, high mold cost, insufficient dimensional precision, environmental pollution and the like in traditional process manufacturing of castings with complicated and high-precision requirements and various weights, and is suitable for production of precise and complicated castings in the fields of chemistry and chemical engineering, aerospace, medical instruments and the like.

The invention discloses a high-temperature response type composite material for coal pile flame retardance and calorific value release coordinated regulation and control and a preparation method and application thereof.The material is formed by a modified inorganic particle filler and a composite high-calorific-value carrier in a coordinated mode, and the modified inorganic particle filler comprises organic modified SiO2 particles and grafted MnFe2O4 nanoparticles containing hydroxyl functional groups; the composite high-calorific-value carrier is composed of polyether, polydimethylsiloxane and a white oil high-calorific-value oil phase. All the components are treated to form an emulsion-like composite system which is uniformly dispersed and stable in structure, and the emulsion-like composite system has good seepage perfusion performance and environmental adaptability. At the normal temperature stage, the initial oxidation rate of coal is reduced by blocking a moisture and oxygen diffusion path, and efficient flame retardance is achieved. And in the high-temperature stage, the cracking and oxidation processes of coal and organic carriers are accelerated through catalysis, the problems of oil phase agglomeration and carbonization coking are solved, and the burn-off rate and the clean combustion performance are remarkably improved. The material system has multiple advantages of normal-temperature flame retardance, high-temperature combustion supporting, no residual carbon pollution and the like.

The invention relates to the technical field of semiconductor wafers, in particular to a preparation method of a semiconductor graphical epitaxial thin film, an embedded electrode structure and application, and the method comprises the following steps: S1, carrying out the pretreatment of a substrate layer, and carrying out the low-temperature deposition of a high-temperature-resistant hard mask layer on the surface of the pretreated substrate layer; s2, performing segmented etching treatment on the deposited high-temperature-resistant hard mask layer and part of the substrate layer according to a photoetching pattern, and removing the photoresist after etching treatment to obtain a first substrate; s3, the first substrate is placed in a PLD cavity, a bottom electrode thin film layer is epitaxially deposited on the etching face of the first substrate, the thickness of the bottom electrode thin film layer is the same as the etched depth of the substrate layer, and a second substrate is obtained; and S4, performing wet etching on the second substrate until the high-temperature-resistant hard mask layer is completely removed, and performing post-processing to obtain the embedded electrode structure. According to the technical scheme, the problems of high-temperature failure, cavity carbon pollution, pattern collapse, surface roughness and the like of traditional optical cement are solved.

The utility model provides a guide cylinder assembly and a single crystal furnace. The guide cylinder assembly comprises a guide cylinder body, an inner sleeve body and a positioning pin, the guide cylinder body is provided with an axially through cylinder channel; the inner sleeve body is arranged in the barrel channel and is provided with a hollow space through which a silicon rod can penetrate, and a pin hole is formed in the inner sleeve body in the wall thickness direction; the positioning pin is connected with the pin hole in a penetrating mode, and the bottom end of the positioning pin is a reference point for measuring the melting gap. By means of the arrangement, the guide cylinder body serves as an existing guide cylinder, hole opening design is not needed, the inner sleeve body is additionally arranged in the guide cylinder body, the inner sleeve body does not have the function of the guide cylinder and can be punched at will, and therefore an installation position is provided for the positioning pin, and the positioning pin is installed at the position outside the guide cylinder body. The loss of the filler in the guide cylinder body is not accelerated, the carbon pollution risk caused by tapping is avoided, and the problems that the arrangement mode of the positioning pin for detecting the melt gap in the single crystal furnace in the prior art is not beneficial to protecting the interior of the guide cylinder and the carbon pollution risk is increased are solved.

The invention belongs to the technical field of rare earth metallurgy, and discloses a method for preparing rare earth metal by electrolyzing molten salt. The method for preparing the rare earth metal through electrolysis of the molten salt comprises the following steps that under the protective atmosphere, a rare earth oxide serves as an electrolysis raw material, electrolysis is conducted in molten salt electrolyte, sediment is collected after electrolysis is finished, and the rare earth metal is obtained. The efficient, green and stable rare earth metal electrolysis preparation system is successfully constructed through the synergistic effect of a multi-dimensional technology, the stability of the electrolysis process and the product quality are remarkably improved while carbon pollution is thoroughly eradicated, efficient and stable preparation of high-purity rare earth metal is achieved, and the method is suitable for industrial production. And the harsh requirements on ultra-pure rare earth products in the fields of high-end electronics, aerospace, high-performance permanent magnet materials and the like can be met.

The present disclosure generally relates to compositions comprising activated carbon derived from a metal-organic salt, and related methods and devices. According to some embodiments, the activated carbon is derived from a metal-organic salt precursor formed from a reaction between an organic acid and a metal-containing inorganic base. The metal-organic salt precursor may be purified by crystallization such that it contains a substantially low amount (or no amount) of impurities. Advantageously, in some embodiments, the controlled nature of the crystalline metal-organic salt precursor results in an activated carbon product without electrochemically active non-carbon contaminants (e.g., ash and / or transition metals) that are conventionally associated with activated carbon derived from biological feedstocks (e.g., biomass materials). The methods described herein, in certain embodiments, therefore provide a purer activated carbon composition that can be used in electrochemical devices (e.g., capacitors), affording longer cycling lifetimes, as compared to, for example, devices that include activated carbon derived from biological feedstocks.

A high-temperature response composite material for synergistic regulation of coal pile fire resistance and heat value release, and a preparation method and application thereof. The material is composed of modified inorganic particle fillers and composite high heat value carriers. The modified inorganic particle fillers include organic modified SiO2 particles and MnFe2O4 nanoparticles grafted with hydroxyl functional groups. The composite high heat value carrier is composed of polyether, polydimethylsiloxane and white oil high heat value oil phase. After treatment, the components form a uniform dispersion, stable emulsion composite system, with good seepage perfusion performance and environmental adaptability. At room temperature, the initial oxidation rate of coal is reduced by blocking the diffusion path of water and oxygen, realizing efficient fire resistance. At high temperature, the cracking and oxidation process of coal and organic carriers is accelerated by catalysis, inhibiting oil phase agglomeration and carbonization coking problems, significantly improving the burnout rate and clean combustion performance. The material system has multiple advantages such as room temperature fire resistance, high temperature combustion support and no residual carbon pollution.

The invention provides a catalyst and application thereof in removal of carbon-containing pollutants, and belongs to the technical field of air purification materials.The catalyst is prepared through the following steps that S1, potassium permanganate, a zinc source, an iron source and a copper source are added into a ferrous chloride aqueous solution, and a mixed solution is obtained; s2, adjusting the reaction temperature of the mixed solution, and carrying out a reaction under an ultrasonic stirring condition to obtain a reaction solution; s3, supplementing a potassium permanganate solution into the reaction solution, performing ultrasonic stirring, and then performing solid-liquid separation and drying to obtain a precursor; and S4, sintering the precursor, carrying out quenching treatment by using a ferrous salt aqueous solution, filtering, crushing, and drying to obtain the catalyst. According to the catalyst provided by the invention, the structural strength of the catalyst can be effectively improved on the basis of ensuring the catalytic activity, and the efficient purification and long-term use of the catalyst on carbon-containing pollutants are ensured.

This invention discloses a method for preparing magnesium-aluminate spinel transparent ceramics by hot-pressing sintering based on mold isolation technology, belonging to the field of transparent ceramics technology. The method involves setting an isolation layer between a graphite mold and a ceramic blank; wherein the isolation layer includes a graphite paper substrate and a homogeneous isolation layer disposed on one side of the graphite paper substrate, the homogeneous isolation layer being made of the same material as the ceramic blank. The isolation layer of this invention effectively blocks the diffusion of carbon-active substances released from the graphite matrix under high temperature and pressure into the ceramic blank, thereby significantly reducing the penetration and residue of carbon impurities inside the ceramic. This method achieves physical isolation by addressing the contamination propagation path, effectively suppressing carbon contamination in transparent ceramics at a lower cost without significantly altering the existing main process, and helps improve the optical uniformity, transmittance, and long-term reliability of the product.