12results about How to "High surface" patented technology

The present invention discloses a surface-reinforced aerogel composite material and a preparation method thereof. The prepared aerogel has the characteristics of light weight, high temperature resistance, low thermal conductivity, high strength, simple structure, etc., can withstand high temperatures, resist high-speed airflow scouring and exert excellent thermal insulation performance, and can be used as a thermal protection material in the aerospace field and other related fields. It can solve the problem that the structural strength of aerogel composite materials in the prior art is usually 2 to 3 orders of magnitude different from that of corresponding dense materials, and they cannot withstand high-speed airflow scouring on the surface of the fuselage of high-speed aircraft, and therefore cannot be used as heat-proof materials.

The invention discloses magnetic asphalt concrete for an electromagnetic induction wireless charging pavement as well as a preparation method and application of the magnetic asphalt concrete, and belongs to the field of road engineering materials and road infrastructures. The magnetic asphalt concrete is prepared from the following raw materials in parts by weight: 8 to 12 parts of magnetic micro powder, 5.5 to 6.5 parts of asphalt, 50 to 75 parts of coarse aggregate, 20 to 40 parts of fine aggregate and 0.1 to 0.2 part of coupling agent, wherein the magnetic micro powder is prepared by mixing magnetic separation steel slag and a solid waste admixture, calcining, ball-milling to obtain magnetic coarse powder, mixing with a composite dispersant, and ball-milling at a high speed; the composite dispersing agent is a mixture of triethanolamine, glycerol and oleic acid. The magnetic asphalt concrete has good adhesion performance and pavement performance, can enhance the adhesion and interlayer mechanical strength of an asphalt concrete surface layer and a charging device when being used for a wireless charging pavement, greatly improves the charging efficiency, prolongs the service life of the pavement, and has a good application prospect.

The invention discloses a preparation method of a high-precision ultra-wide 50 steel cold-rolled steel strip, and belongs to the technical field of ferrous metallurgy. In the production process of the steel strip, the surface quality of the pickled steel strip is improved by optimizing the pickling process; the total reduction rate of cold rolling is adjusted, the problem of steel strip rolling edge cracking is eliminated, and a product is rolled to the target thickness; a process lubricating system of the rolling mill is optimized, so that the surface quality and the plate shape quality of a product are improved; and the annealing process parameters are optimized, so that the physical properties of the product are ensured. The high-precision ultra-wide 50 steel cold-rolled steel strip is successfully developed by adopting the measures of optimizing chemical components and physical properties of a cold-rolled base material, optimizing an acid pickling process, adjusting the total reduction rate of cold rolling, optimizing a rolling mill process lubricating system and annealing process parameters and the like; the problems that in the using process of a traditional steel belt, the thickness fluctuation is large, the plate shape quality is poor, and the surface quality is poor are solved.

The invention discloses a release agent for casting a refractory material and a preparation method of the release agent. The formula of the release agent comprises 55-65% of high-purity silicon carbide, 35-46% of a polyvinyl alcohol solution, 0.4-0.9% of sodium benzoate, 0.01-0.05% of octanol and 0.5-2.0% of xanthan gum. Wherein the mass percentage SiC content of the high-purity silicon carbide is greater than or equal to 97%, and the particle size is 1-2mm; the mass percent concentration of the polyvinyl alcohol solution is 4-14%. The preparation method comprises the steps of weighing, burdening, stirring and mixing, dispersing by a colloid mill and the like. The release agent can obviously prevent sand burning of a sand mold to the fused-cast refractory product, reduces the demolding resistance of the product after annealing, and improves the casting quality of the fused-cast refractory product.

This invention discloses a low-cost rare earth weathering steel and its production process. The chemical composition and mass percentage of the weathering steel are as follows: C 0.06%~0.12%, Si 0.25%~0.50%, Mn 0.60%~1.00%, P 0.07%~0.12%, S≤0.005%, Cu 0.15%~0.40%, Cr 0.30%~0.50%, Ce 0.002%~0.015%, Alt 0.020%~0.050%, Ti 0.02%~0.08%, N≤0.006%, with the balance being Fe and unavoidable impurities. This weathering steel uses rare earth oxides added to refining slag, and a high-alkalinity, low-oxidizing refining process to improve rare earth yield. Rare earth inclusions and nozzle turbulence are modified through calcium-magnesium composite treatment, achieving rare earth micro-alloying to replace high-alloy additions. While meeting the mechanical properties and high corrosion resistance of 355MPa grade weathering steel, it significantly reduces alloy costs by more than 15% compared to traditional weathering steel. The process flow is compatible with existing production lines and is suitable for industrial mass production.

The application relates to the field of functional polymer film materials, and discloses a porous film and a preparation method and application thereof. Two surfaces of the porous film are a hydrophilic film surface and a hydrophobic film surface; wherein the pore diameter of the porous film is 0.05-20 mu m, the average pore diameter is 2-15 mu m, the porosity is 35-80 vol.%, and the porous film is distributed with micro-protrusion structures. The porous film can effectively reduce water evaporation, the surface energy of the hydrophobic layer is relatively high, is suitable for water or mist collection, has good stability, is easy to recycle, and can avoid water body pollution caused by residual solvents on the film surface.

The invention relates to the technical field of grease fractionation finished products, and particularly discloses a preparation method of low-temperature-resistant high-iodine-value palm oil for a lubricant. The preparation method of the low-temperature-resistant high-iodine-value palm oil for the lubricant comprises the following steps: heating crude palm oil to completely dissolve the crude palm oil, then adding glyceryl stearate and cane sugar, and mixing to obtain a crude palm oil solution; cooling the palm crude oil solution to 21-23 DEG C, keeping the temperature constant, cooling to 11-13 DEG C, keeping the temperature constant, continuously cooling to 2-4 DEG C, keeping the temperature constant, continuously cooling to (-6)-(4) DEG C, and keeping the temperature constant to obtain a solid-liquid mixture; separating the solid-liquid mixture to obtain palm liquid oil; and adding a crystal inhibitor and an antioxidant into the palm liquid oil, and mixing to obtain a palm oil finished product. The palm oil finished product obtained through the preparation method has the advantages of being low in melting point, good in low temperature resistance, high in iodine value and high in yield, is suitable for being used as a lubricating agent and meets market requirements.

The invention relates to a preparation method and application of proton exchange membrane electrolyzed water iridium-based catalyst coating slurry, and aims to improve the dispersity of an iridium-based catalyst in the slurry, enhance the combination effect of the surface of the catalyst and Nafion, reduce the repellency of each component in a mixed system, obviously improve the dispersion state of the slurry, and improve the stability of the slurry. And the flow spreading of the slurry on the coating substrate is more uniform, and a uniform and crack-free catalyst layer is obtained through coating. The technology is rapid, simple and convenient, small in required technical difficulty, capable of preparing the slurry on a large scale and suitable for batch production.

Provided is a cellulose acylate composition containing cellulose acylate particles and metal compound-containing particles. The total degree of substitution of the cellulose acylate is from 0.7 to 2.9. The metal compound is one or more types of compounds selected from an alkali metal compound and an alkaline earth metal compound. The composition is produced by adding one or more types of metal compounds selected from an alkali metal compound and an alkaline earth metal compound during and / or after removing a water-soluble polymer from a dispersion containing, as a dispersoid, cellulose acylate impregnated with a plasticizer to form cellulose acylate particles.

The invention belongs to the technical field of oil and gas equipment detection, and particularly relates to a magneto-optical imaging detection system and a self-adaptive excitation and defect quantification method. The magnetic circuit module of the magneto-optical imaging detection system is designed to be more efficient in excitation intensity, and the lift-off of the magneto-optical film is smaller, so that the magneto-optical imaging detection system has higher surface and burial depth defect detection sensitivity; the integration level of the optical imaging module is higher, and the formed packaging structure of the magneto-optical imaging detection system is smaller. The magneto-optical imaging detection system comprises a scanning probe, a light source controller, an industrial control all-in-one machine, a direct-current power supply and a power amplifier, the scanning probe comprises a magnetic circuit module and an optical imaging module; the magnetic circuit module is composed of a coil, manganese zinc ferrite, a magnetic shielding layer and a magneto-optical sensor. The optical imaging module is composed of a camera, a polarized light source and a polaroid. Wherein the coil is wound on the periphery of the manganese zinc ferrite and is connected with the direct-current power supply and the power amplifier; the magnetic shielding layer is arranged on the outer side of the magneto-optical sensor.

The application discloses a preparation method of a self-supporting GaN substrate based on graphene and relates to the technical field of semiconductor devices. The preparation method comprises the following steps: performing pattern processing on a graphene layer on a substrate layer to prepare a graphene mask region with a plurality of window regions arranged at intervals; depositing a GaN thin film in the graphene mask region by using a metal organic chemical vapor deposition process until the GaN thin film of the window region forms a gap with the substrate layer; depositing a GaN film layer on the GaN thin film by using a hydride vapor phase epitaxy process, and obtaining a self-supporting GaN substrate after a stripping treatment; wherein the temperature of a nucleation growth stage is 550 DEG C-600 DEG C, and the temperature of an annealing crystallization stage is 1050 DEG C-1100 DEG C. The application realizes the significant reduction of the interface bonding strength between a GaN epitaxial layer and a substrate while ensuring the high-quality growth of the GaN epitaxial layer, so that the lossless stripping can be realized and a high-quality self-supporting GaN substrate can be obtained.

The utility model discloses a shot blasting machine blade polishing device which comprises a device body, a supporting frame, a motor, a rotating shaft, a polishing disc and a limiting frame, the supporting frame is located at the top end of the device body, an air cylinder is installed at the top end of the supporting frame, the output end of the air cylinder is connected with the top surface of the limiting frame, the limiting frame is in sliding fit with the supporting frame, and the motor is installed in the device body. The output end of the equipment body is connected with one end of the rotating shaft, the other end of the rotating shaft is connected with the center point of the grinding disc, a positioning groove for guiding the blade body is formed in the limiting frame and is in sliding fit with the blade body, and the blade body is in grinding fit with the grinding disc. According to the blade polishing equipment for the shot blasting machine, the shot blasting effect and the equipment safety of the shot blasting machine can be improved, the working efficiency can be improved, the maintenance cost can be reduced, meanwhile, the environment-friendly requirement is met, and the blade polishing equipment has multiple beneficial effects.