6 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 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.

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.