12 results about "Glow discharge plasma" patented technology

This invention discloses a SiC with an ultra-high temperature ceramic gradient coating. f / SiC composite materials, their preparation methods, and applications. A double-layer glow discharge plasma surface metallurgical method is used to prepare SiC composite materials. f A (Hf,Si,Ta)C gradient composite coating was prepared on the surface of the SiC composite material. This coating was able to resist SiC in an oxygen atmosphere at 1773 K. f Effective protection of SiC composite materials. The specific advantages of this invention are: (1) Ion bombardment of the substrate significantly improves the point defects and conductivity of the composite substrate; (2) The (Hf,Si,Ta)C coating has a continuous gradient structure, forming a good metallurgical bond between the coating and the substrate, with high bonding strength; (3) The similar thermal expansion coefficients of the (Hf,Si,Ta)C coating and the substrate can improve the thermal mismatch between the coating and the substrate, reducing the tendency for coating peeling and cracking during service; (4) The (Hf,Si,Ta)C coating system has a high service temperature and self-healing ability. The coating prepared by this invention has excellent high-temperature protection performance, improving the protection of SiC. f The high-temperature service life of SiC composite materials has broad application prospects in the aerospace field.

The present application relates to the technical field of mineral processing, and particularly relates to a modified dodecylamine collector, a preparation method and application thereof.The preparation method of the modified dodecylamine collector provided by the present application comprises the following steps: carrying out glow discharge air plasma treatment on dodecylamine by taking air as a working gas.The present application introduces oxygen-containing and / or nitrogen-containing active groups on the surface of dodecylamine molecules by means of glow discharge air plasma modification of dodecylamine, and the dodecylamine is used for flotation separation of quartz and hematite, so that the adsorption capacity and selectivity of the dodecylamine to quartz, especially fine quartz, are enhanced, and efficient separation of quartz and hematite can be realized at a lower dosage; and the raw material of the preparation method is green and environmentally friendly, the modification process is low-temperature, safe and controllable, no by-product is generated, and the energy consumption is low.

The application relates to the field of semiconductor material preparation, in particular to a preparation method of a GaON epitaxial film prepared through plasma-enhanced chemical vapor deposition (PECVD). The GaON epitaxial film is prepared by taking metal gallium as a gallium source, taking oxygen as an oxygen source, taking nitrogen as a nitrogen source and taking argon as a transport gas. The GaON epitaxial film is prepared by optimizing post-growth parameters through a PECVD system. The method can make gaseous substances containing film components chemically react through glow discharge plasma, and then realize film material growth. Since a large number of high-energy electrons are contained in the plasma, the high-energy electrons can provide the activation energy required by the chemical vapor deposition process, so that the reaction temperature is significantly reduced, and the efficiency and quality of film deposition are improved. The GaON epitaxial film prepared through the method has excellent performance and meets the needs of future industrialized mass production.

The invention relates to a method for processing a sample using glow discharge plasma, the method comprising one or more processing steps in which the sample for processing is subjected to plasma in a processing vessel provided with a temperature control system for cooling or heating the sample, wherein during the one or more processing steps the processing vessel is rotated around an axis to agitate the sample. The invention also relates to a device for use in such a method.

The present application relates to the technical field of mineral processing, and particularly relates to a modified dodecylamine collector, a preparation method and application thereof.The preparation method of the modified dodecylamine collector provided by the present application comprises the following steps: carrying out glow discharge air plasma treatment on dodecylamine by taking air as a working gas.The present application introduces oxygen-containing and / or nitrogen-containing active groups on the surface of dodecylamine molecules by means of glow discharge air plasma modification of dodecylamine, and the dodecylamine is used for flotation separation of quartz and hematite, so that the adsorption capacity and selectivity of the dodecylamine to quartz, especially fine quartz, are enhanced, and efficient separation of quartz and hematite can be realized at a lower dosage; and the raw material of the preparation method is green and environmentally friendly, the modification process is low-temperature, safe and controllable, no by-product is generated, and the energy consumption is low.

This invention discloses a method for modifying activated carbon and its application in the adsorption of CVOCs, belonging to the field of environmental protection technology. This invention prepares activated carbon through a multi-step modification process using low-pressure glow discharge plasma. The resulting activated carbon possesses high specific surface area, high adsorption capacity, and excellent hydrophobic properties. The adsorption system achieves fully automated integrated CVOCs adsorption-desorption-regeneration-wastewater treatment. The system of this invention can treat concentrations ≥10000 mg / m³. 3 The CVOCs waste gas, after purification, has a gas concentration ≤50mg / m³. 3 Simultaneously, it treats CVOCs wastewater with COD of 5000~7000mg / L to ≤50mg / L, all meeting national standards; the system reduces operating costs by over 77%, and after 7200 hours of continuous use, the activated carbon loss rate is ≤2%, and the purification efficiency is ≥99%, resulting in significant environmental and economic benefits.

This invention discloses a method for physical vapor deposition of a ceramic coating on the surface of an extrusion die working belt, belonging to the technical field of coating on the surface of extrusion die working belts. The method includes the following steps: surface pretreatment of the extrusion die working belt, including cleaning and degreasing, polishing, and activation treatment; the activation treatment refers to sequentially performing acid washing, primary salt washing, water washing, glow discharge plasma treatment, secondary salt washing, and water washing on the surface of the extrusion die working belt using an activation treatment solution; preparing a ceramic coating material by depositing the ceramic coating material on the surface of the extrusion die working belt using physical vapor deposition equipment to form a ceramic coating with a thickness of 4 micrometers to 6 micrometers; and post-treatment of the extrusion die working belt surface. The ceramic coating of this invention has high hardness, strong bonding strength with the die surface, excellent impact resistance, and is less prone to cracking, peeling, or even breakage.

The invention discloses a plasma parameter diagnosis method based on a Bi-LSTM model and related equipment, and the method comprises the steps: obtaining I-V characteristic data of double probes in a DC glow discharge plasma device under different potential deviation angles and different discharge voltage-air pressure combinations, plasma parameters corresponding to the I-V characteristic data at the datum point are recorded; taking the plasma parameters as labels of the I-V characteristic data to construct a data set, dividing the data set into a training set and a verification set, and training a preset Bi-LSTM model by taking minimization of a mean absolute error as a target to obtain a target Bi-LSTM model; and inputting the I-V characteristic data of the double probes to be tested into the target Bi-LSTM model to obtain plasma parameters corresponding to the I-V characteristic data of the double probes to be tested.

This invention discloses a resonant constant current source-driven dual-mode discharge plasma wastewater treatment system and method, belonging to the field of organic wastewater technology. The glow discharge unit of this invention is located within a reaction chamber and is used to generate stable glow discharge plasma in a pure oxygen atmosphere to generate hydrogen peroxide in situ. The packed bed dielectric barrier discharge unit includes at least one U-shaped discharge tube, high-dielectric particles filled inside the U-shaped discharge tube, a carbon fiber high-voltage electrode disposed at the center of the U-shaped discharge tube, and a grounded cooling pool. The U-shaped discharge tube is immersed in the grounded cooling pool. The carbon fiber high-voltage electrode is electrically connected to the resonant constant current unit via a high-voltage switch. The inlet of the U-shaped discharge tube is connected to an oxygen source, and the outlet is connected to the interior of the reaction chamber, used to generate ozone in an oxygen atmosphere and introduce the ozone into the reaction chamber. This invention improves the degradation rate and eliminates secondary pollution.

The invention discloses a system and method for driving plasma to convert carbon dioxide and water through new energy, and belongs to the technical field of greenhouse gas resource utilization and energy conversion. The system for driving the plasma to convert the carbon dioxide and the water through the new energy comprises a renewable power supply module, a plasma catalysis carbon dioxide and water conversion module and a product aftertreatment module, a plasma reactor comprises an outer medium pipe, and a net-shaped supporting piece is arranged in the outer medium pipe; a plurality of atmospheric pressure glow discharge plasma jet devices arranged in an array structure are arranged above the net-shaped supporting piece, an atmospheric pressure glow discharge plasma jet array can be provided, the effective action volume of plasmas is enlarged, the contact effect of active species in the plasmas with a carbon bed and a catalyst bed is further improved, and the service life of the plasmas is prolonged. And the production rate and selectivity of the product meet industrial application requirements.

This invention belongs to the field of plasma applications and relates to a material surface treatment device for axial magnetic field-controlled low-temperature plasma. The device includes an outer cylinder, a high-voltage tip electrode, a flat ground electrode, an electromagnetic coil, and a magnetic core. One end of the high-voltage tip electrode penetrates the left cover plate and extends into the discharge cavity, while the other end is connected to a high-voltage power supply. The flat ground electrode is disposed inside the outer cylinder and opposite to the high-voltage tip electrode. A placement platform for placing the material to be treated is pre-fabricated on the side of the flat ground electrode closest to the high-voltage tip electrode. An electromagnetic coil is laterally arranged around the outer cylinder and connected to a magnetic control unit. A magnetic core is disposed on the inner wall of the outer cylinder. An air inlet is opened on the left cover plate, and an air outlet is opened on the right cover plate. A large-area diffuse distribution of atmospheric pressure glow discharge plasma can be obtained between the high-voltage tip electrode and the flat ground electrode. The size of the distribution space can be precisely adjusted by the magnitude of the magnetic field strength, thereby expanding the distribution space of atmospheric pressure glow discharge diffuse low-temperature plasma.

The invention relates to the technical field of low-temperature plasma and interface construction, in particular to a method for regulating and controlling a composite material interface at low temperature based on plasma. According to the method, the composite material is placed in a glow discharge plasma chamber, inert gas is introduced after vacuumizing, low-temperature regulation and control treatment is carried out, and regulation and control of the interface of the composite material are completed. According to the method for low-temperature regulation and control of the composite material interface based on the plasma, low-temperature precise regulation and control of the composite material interface can be achieved, the macroscopic temperature of the composite material interface is close to the room temperature during application, and therefore the structure of the material cannot be damaged; the method only needs one-step operation, is simple, high in treatment speed, safe and reliable, does not use toxic reagents, has few material defects, is uniform in composite material component distribution, and has a wide application prospect in the fields of catalysis, microelectronics industry, polymer films and the like.