23results about How to "Avoid high temperature oxidation" patented technology

The utility model discloses an open gas protection integrated high-frequency coil, which relates to the field of high-frequency coil welding and comprises an induction body, the induction body is mounted on a power supply base, and power is supplied to the induction body through the power supply base; a first isolation belt and a second isolation belt are sequentially formed in an inner cavity of the induction body from outside to inside, a water flow cavity is formed between the outer wall of the first isolation belt and the inner wall of the induction body, and the water flow cavity achieves water flow circulation through an external water inlet pipe and an external water outlet pipe. An air flow cavity is formed between the inner wall of the first isolation belt and the outer wall of the second isolation belt, the water flow cavity and the air flow cavity are separated through the first isolation belt, the bottom of the air flow cavity is connected with an air inlet pipe used for introducing shielding gas, and a welding induction hole is formed in the inner side of the second isolation belt in a penetrating mode and used for placing a welding part; and the airflow cavity is communicated with the welding induction hole. According to the utility model, only one group of open-type high-frequency coils is needed to realize synchronous heating and shielding gas introduction.

The invention particularly relates to a solid heat storage material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: mixing magnesite tailing fine powder, alumina tailing fine powder, quartz sand fine powder, used magnesia carbon brick fine powder and barium sulfate fine powder to obtain premixed powder; mixing the magnesite tailing particles with the particle size of 5-3mm, the alumina tailing particles with the particle size of 3-1mm, the quartz sand particles with the particle size of 3-1mm and the magnesite tailing particles with the particle size of less than or equal to 1mm to obtain a granular material; mixing the granules with the premixed powder to obtain a mixture; and adding a polyvinyl alcohol solution, uniformly mixing, carrying out compression molding, drying, and carrying out heat treatment at 1300-1500 DEG C for 5-8 hours to obtain the solid heat storage material. The prepared solid heat storage material is high in heat conductivity, large in heat storage capacity, high in thermal shock resistance and large in compression strength.

The application belongs to the technical field of two-dimensional materials, and relates to a method for preparing two-dimensional MXene materials through high-energy electric shock fluorinated salt etching in seconds, which comprises the following steps: 1) after grinding and mixing of a parent phase MAX powder and a fluorinated salt, the mixture is loaded into a quartz tube of a high-energy electric shock device, graphite electrodes are inserted into two ends of the quartz tube, and the material is compacted to be in close contact with the electrodes; 2) after completion of capacitor charging of the high-energy electric shock device, a discharge button is opened, high-energy electric shock is performed, the reaction is completed after flash phenomenon occurs, fluorinated salt is supplemented, and electric shock is repeated for 2-3 times; 3) the product after electric shock is ground and washed with acid, and after washing with deionized water until neutral, standing or centrifugal layering is performed, and the MXene two-dimensional material is obtained from the upper layer. Through high-energy electric shock, the reaction is completed in an instant, the comprehensive energy consumption is lower, and the etching efficiency is faster, and due to fast reaction time, high-temperature oxidation of the MXene can be effectively inhibited, and the application prospect is better.

The utility model discloses a kind of adjustable heating device for composite electric contact material, and heating device includes rack and heating furnace;Partition heating pipe for being used to supply belt material to pass is replaced or alternatively inserted in heating cavity;Partition heating pipe inner cavity is not communicated with heating cavity space, and heating cavity and / or partition heating pipe are separately independently ventilated into protective atmosphere;Composite equipment includes belt material unwinding device, material polishing device, heating device, rolling cooling device, belt material winding device sequentially arranged along the direction of transmission of belt material to be compounded;The application adopts variable protective atmosphere structure of insertable partition heating pipe, flexible construction of heating interval is realized, just replace different types or specifications of partition heating pipe, heating and atmosphere protection adjustment under different materials or process conditions can be satisfied;Not limited to the specific heating source or specific setting of heating furnace, without changing the overall structure of heating furnace, improve the adaptability and flexibility of composite equipment in multi-process scene.

This invention provides a surface mount reflow soldering method and apparatus. The method includes: pre-treating the solder paste state and performing reference positioning correction on the PCB pads to align the PCB pads with the target pad area; using an electroformed stencil with inverted conical openings and a surface nano-coating, printing the pre-treated solder paste onto the PCB pads under closed-loop monitoring; placing the printed PCB in a reflow soldering chamber, and strictly controlling the residual oxygen content in the chamber below a preset critical value through a closed-loop oxygen concentration control system; and performing thermal history control of the reflow soldering peak temperature, holding time, and cooling temperature based on the melting point characteristics of the solder paste to complete the soldering process. This improves printing transfer efficiency, reduces soldering oxidation problems, and ensures sufficient melting and wetting of the solder.

The invention relates to the technical field of tar residue treatment, in particular to mechanical residue removing equipment and process based on a tar residue storage tank, the residue removing equipment comprises the storage tank, a mixture conveying pump, a production unit and a guarantee unit, the mixture conveying pump is an intelligent variable frequency pump, and an outlet of the storage tank is connected with the input end of the mixture conveying pump; a flow detection module is mounted at the joint of the mixture conveying pump and the storage tank and is used for monitoring the flow of the tar residue mixture in real time and feeding back a signal to a control system of the mixture conveying pump; the output end of the mixture conveying pump is connected with the production unit, and the production unit is provided with two output ends, namely a solid output end and a liquid output end; the liquid output end is connected with the guarantee unit, and the guarantee unit comprises a showering system and a steaming and blowing system; the viscosity of the tar residues in the storage tank is greatly reduced through intermittent steaming and blowing softening and synchronous ammonia water spraying, the mixture conveying pump is smooth in pumping, and the problems that the tar residues in the storage tank are left and cannot be cleaned thoroughly are solved.

The application discloses a kind of low altitude flight sensing radar equipment chip level high temperature dynamic aging test unit, it is related to chip aging equipment technical field, including the heating carrier for bearing low altitude flight sensing radar equipment chip and the closed cavity for providing closed test environment, heating carrier is connected with closed cavity by pull-out type structure cooperation, realize independent development aging test or multiple integrated combination use;Heating carrier includes metal elastic needle, PCB board, heating module, metal heat sink, sheet metal shell, guide rail clamping groove and multi-core plug terminal, closed cavity includes cavity shell, guide rail, heat dissipation fan, gas valve and drawer locking mechanism.Can overcome the defects that existing equipment cannot unit temperature control, poor adaptability, unstable test environment, realize equipment structure simplification and miniaturization, achieve each test unit independently controlled temperature, gas environment and other parameters, while improving test operation convenience and result accuracy, reduce test cost.

The utility model discloses a novel bend -resistant polyester type halogen -free environmental protection explosion -proof shielding control cable, including cable installation layer, the outside installation of cable installation layer has cable protection composite layer, the cable protection composite layer includes elastomer sheath, the inside installation of elastomer sheath has multipoint position bending monitoring subassembly, and the multipoint position bending monitoring subassembly is by elastic electricity -making band and a plurality of bending monitoring units, and the elastic electricity -making band includes elastic protection zone, and the inboard of elastic protection zone is installed with a plurality of electricity -making silk, and the bending monitoring unit includes installation box, and the inboard fixed mounting of installation box has electricity -making seat, and the upper end surface fixed mounting of electricity -making seat has pressure -sensitive resistance, and the upper end surface installation of pressure -sensitive resistance has the elastic support plate. The utility model discloses through to the cable and carries out the layering cladding, can effectively improve the bending -resistant and stability of cable, can determine the bending position and bending degree simultaneously.

The present invention discloses a box for a thermal oxidation device and a thermal oxidation device. The purpose of the present invention is to provide a thermal oxidation device that can treat NO at low temperature. x A new flameless catalytic thermal oxidizer is provided to reduce the concentration of harmful substances such as THC. Another object of the present invention is to provide a flameless catalytic thermal oxidizer that can minimize the occurrence of THC and minimize the risk of accidents and environmental pollution caused during maintenance work. According to the above object, the present invention provides a box-type thermal oxidizer that can be separated for maintenance, the internal structure of the box is configured to increase the time that the object to be treated stays in the section with the catalyst, and a component is configured to allow the powder generated by the thermal oxidation reaction to fall and be collected.

The utility model discloses a target material heat treatment furnace capable of accurately measuring temperature on line, which comprises a furnace body, a temperature display instrument, a plurality of temperature measuring devices and a plurality of temperature measuring wires, the temperature measuring devices are respectively inserted into temperature measuring holes of a target material, the temperature display instrument is arranged outside the furnace body, and one side of the furnace body is provided with a threading hole communicated with a furnace cavity of the furnace body. One end of each temperature measuring line is connected with the temperature measuring device, the other end of each temperature measuring line penetrates through the threading hole to be connected with the temperature display instrument, fireproof heat insulation filler is filled between the threading hole and each temperature measuring line, and each temperature measuring device is provided with a sealing piece used for sealing the temperature measuring hole of the target material. A plurality of temperature measuring holes are formed in the target material, and the temperature measuring devices are respectively inserted into the temperature measuring holes, so that the actual temperature of the target material is directly detected, heat treatment process parameters can be accurately controlled, and the influence of a target material heating curve lagging behind the display temperature of a target material heat treatment furnace on the quality of the target material is reduced; the influence of different initial charging temperatures on the target material quality is reduced, and the target material grain uniformity is improved.

The invention discloses a preparation method for coating one side of glass fabric with polytetrafluoroethylene by a vertical gluing machine, and belongs to the field of manufacturing of bonding sheets in copper-clad lamins.The preparation method comprises the steps that firstly, the glass fabric is installed on a rolling device, and tension is adjusted through a fabric storage mechanism; then, a vertical three-roller precise transfer coating system is used for quantitatively coating the PTFE slurry with the controlled viscosity in a constant-temperature glue storage tank on the cloth surface in a single face mode, and the non-coating face is synchronously gelatinized; the coated cloth enters a six-section type vertical drying oven to be subjected to stepped curing, pre-drying, high-temperature melting, crystallization curing and gradient cooling are conducted in sequence, the temperature of the high-temperature section reaches 380-385 DEG C, and a double-layer air curtain is arranged on the non-coated side for isolation; and finally, cooling to 50-80 DEG C, and rolling. The tension is controlled within the range of 5-15 N / cm through a sectional type vertical tension control system in the whole process. According to the method, single-face accurate coating is achieved, the problems of slurry waste, poor uniformity, many defects, unstable size and the like of a traditional horizontal process are solved, and the product performance is excellent.

The invention discloses a replaceable integral tapping hole brick and a preparation method thereof, and belongs to the technical field of refractory materials for converter tapping and slag blocking, the replaceable integral tapping hole brick comprises an integral assembly tapping hole and a repairing material for replacing the tapping hole, and is characterized in that the integral assembly tapping hole comprises a metal steel pipe, a filler seam and a tapping hole sleeve brick, the tapping hole sleeve brick comprises a web brick, a large-head brick, an inlaid matched brick and an inner water gap, and the tapping hole sleeve brick is composed of granular materials and fine powder materials. According to the replaceable integral tapping hole brick and the preparation method thereof, the graphite is subjected to granulation treatment in advance, the granulated graphite with Al-C wrapped MgO particles is obtained, the carbon content is reduced, and meanwhile the high-temperature strength of the tapping hole brick is improved; and meanwhile, the assembly mode of the whole tapping hole brick is optimized and improved, the tapping hole sleeve brick is assembled by adopting a web brick, a large-head brick, an embedded matched brick and an inner nozzle mode, the slag-stopping tapping process requirement of the converter sliding plate mechanism is met, and meanwhile the service life of the tapping hole can be further prolonged.

The present application relates to metal wire plastic processing and photovoltaic module manufacturing technical field, more specifically, it relates to a kind of photovoltaic copper wire double-mode traction gas-liquid cooling stretching process and device, including integrated frame, on integrated frame, along the direction of travel of photovoltaic copper wire, first wire drawing module, tension compensation module, second wire drawing module and gas-liquid cooling module are sequentially arranged, controller is as core hub, coordinate first wire drawing module and second wire drawing module gradually progressive exert traction force, traditional single-stage concentrated stretching stress is dispersed into two-stage progressive stretching, reduce single-point stress concentration, tension compensation module can be dynamically path adjusted, to absorb or release excess tension, gas-liquid cooling module can be targeted cooling and drying treatment, realized "dispersion stretching-dynamic stable tension-on-demand cooling" integrated closed-loop operation, effectively overcome the problem such as wire breaking of tension mutation in traditional wire drawing process, heat accumulation causes lattice distortion and surface oxidation.

The invention relates to the technical field of metal production, and discloses an up-drawing crystallizer with an anti-oxidation device, which comprises a crystallizer socket used for being butted with an up-drawing movable position of an up-drawing crystallization copper wire blank, the crystallizer socket is positioned in a crystallization bin, and a thermal insulation outer layer is arranged at the upper end of the crystallization bin. According to the up-drawing crystallizer with the anti-oxidation device, a first graphite guide sealing sleeve and a second graphite guide sealing sleeve are arranged in holes in the upper end and the lower end of a thermal insulation inner layer, and a first shrinkage inner plate arranged in the first graphite guide sealing sleeve is used for reducing leakage of nitrogen due to excessive nitrogen; the contraction arc piece and the movable arc piece which are arranged in the second graphite guide sealing sleeve further limit the upward guiding process of the copper wire blank, nitrogen is prevented from moving and leaking along with the copper wire blank, oxidation of metal in the crystallization process is effectively prevented through the arrangement of the first graphite guide sealing sleeve and the second graphite guide sealing sleeve, generation of oxidation impurities is reduced, and the service life of the copper wire blank is prolonged. Therefore, the purity and quality of a crystallized product are improved.

The present invention discloses a textured surface spectral absorption coating for enhancing light trap effect and a preparation method thereof. The method cleverly uses element diffusion through high-temperature annealing and oxidation reaction, so that elements with higher diffusion coefficients in the substrate diffuse to the substrate surface, and grow raised oxides on the flat substrate surface to form a natural textured surface, so as to prolong the diffusion process and improve the spectral absorption performance and high-temperature stability of the coating. Then, by depositing an oxide layer / nitride layer / nitride oxide layer as an anti-reflection layer, an anti-oxidation layer, and an element diffusion inhibition protective layer, the high-temperature oxidation resistance of the coating is further improved. The coating is a combination of a textured surface and a protective layer, which solves the problem of structural damage caused by atomic diffusion and surface oxidation in the coating at high temperatures, and improves the high-temperature thermal stability to 800°C. The method and equipment provided by the present invention has a low threshold, is green and environmentally friendly, does not produce secondary hazards, has simple steps, low cost, strong controllability, and can be used for industrial large-scale production.

The application provides a metallized polymer film and a preparation method thereof, which comprises the following steps: S10: providing a polymer base film; S20: spraying a metal powder to the surface of the polymer base film by an atmospheric plasma torch to form a metal coating on the surface of the polymer base film, so as to obtain the metallized polymer film. By using the atmospheric plasma torch and controlling the spraying conditions, the application realizes the control of the high-speed plasma jet energy, and then the momentum and heat input to the surface of the polymer base film, so that the metal coating is deposited on the surface of the polymer base film without damaging the polymer base film, thereby obtaining the metallized polymer film with the stable and firm combination of the metal coating and the polymer base film.

The application provides a Sn-In-Ga ternary doped copper powder, a preparation method thereof and a TOPCon photovoltaic copper paste. The Sn-In-Ga ternary doped copper powder comprises copper powder, tin, indium and gallium, the tin, the indium and the gallium are attached to the surface of the copper powder, and the atomic molar ratio of each element in the Sn-In-Ga ternary doped copper powder is Cu:Sn:In:Ga=(98.0-99.2):(0.2-0.8):(0.2-0.8):(0.2-0.8). The Sn-In-Ga ternary doped copper powder can have good conductivity, oxidation resistance and interface compatibility.

The invention discloses a composite coating capable of enhancing high-temperature hydrogen corrosion resistance and a manufacturing method thereof, and relates to the technical field of composite coatings, the composite coating comprises the following components: 40-60% of a ceramic matrix material, and a mixture of alumina and zirconia; 20-30% of a metal binder, wherein alloy powder of nickel and chromium is selected; 5%-15% of an additive selected from tungsten carbide, boron nitride or silicon carbide; and 3%-10% of a polymer sealing layer. According to the composite coating disclosed by the invention, aluminum oxide and zirconium oxide are adopted as matrix materials, and a nickel-chromium alloy binder is combined, so that the corrosion resistance in a high-temperature environment is improved, and hydrogen embrittlement is prevented. And by adding carbides such as tungsten carbide or silicon carbide, the wear resistance and crack resistance of the coating are enhanced, and the reliability of the coating in a high-temperature and high-pressure environment is improved. By covering the surface with a polyimide or polytetrafluoroethylene sealing layer, hydrogen permeation and oxidation are further prevented, and long-term stability of the coating is ensured.

The invention discloses a nitrogen-containing heterocyclic borate modified black phosphorus nanosheet for a lubricating oil additive, and a preparation method and application of the nitrogen-containing heterocyclic borate modified black phosphorus nanosheet. The lubricating material is prepared from the following raw materials in parts by weight: 0.6 part of black phosphorus / polyvinylpyrrolidone composite powder, 0.6 part of polyvinylpyrrolidone and 1-3 parts of bismuth oxide, the preparation method of the black phosphorus / polyvinylpyrrolidone composite powder comprises the following steps: mixing black phosphorus powder and polyvinylpyrrolidone in an organic solvent, carrying out alternate mechanical stirring and ultrasonic treatment to obtain a suspension, centrifuging, taking a precipitate, and carrying out vacuum drying to obtain the black phosphorus / polyvinylpyrrolidone composite powder. According to the lubricating material provided by the invention, through a double protection mechanism of bismuth oxide coating and PVP grafting, high-temperature oxidation of black phosphorus is effectively inhibited, and the thermal stability of the material is remarkably improved. The material can still keep a low friction coefficient of 0.18-0.25 at a high temperature of 800 DEG C, and has excellent friction reduction and wear resistance. In addition, the lubricating liquid prepared from the lubricating oil is good in dispersion stability, free of sediment after standing at normal temperature for 7 days and convenient to store and use.

This invention relates to an ultra-low temperature ceramic binder, which is mainly composed of the following raw materials in the indicated mass percentages: Bi₂O₃: 40-80%, B₂O₃: 5-15%, ZnO: 10-35%, SiO₂: 0-5%, Li₂O: 0.5-3%, TiO₂: 0-5%, CaF₂: 2-10%, Y₂O₃: 0-5%. This binder can be fired at a minimum temperature of 400°C and softened at a minimum temperature of 320°C. It enables the ceramic binder to achieve bonding and consolidation before the polymeric pore-forming agent and temporary polymeric binder burn off, maintaining the integrity of the pore structure while achieving a high porosity. Furthermore, using this ceramic binder and a preferred polymeric pore-forming material, it is possible to construct spherical pores with interconnected microscopic gaps, and the pore size can be controlled during preparation.

The invention discloses an integrated forming method of an aluminum-based porous composite material sandwich panel, and relates to a preparation method of a sandwich panel. The problems that in a sandwich board structure prepared through an existing gluing method, the bonding interface strength of a panel and a core layer is low, the bonding interface of the panel and core layer metallurgical bonding sandwich board structure prepared from metal powder as the panel is uneven, and the thickness of the core layer is difficult to precisely regulate and control are solved. The aluminum-based porous composite material prepared by a pressure infiltration method is used as the core layer of the sandwich panel structure, and the metal plate or the carbon fiber reinforced aluminum-based porous composite material is used as the panel, so that the energy absorption characteristic of the sandwich panel structure is greatly improved; and the problems that the contact interface of the metal powder and the hollow microspheres is uneven and the thickness of each layer is difficult to accurately regulate and control are solved, the designability is high, and the material selection and the thickness of the metal plate and the core layer can be regulated and controlled according to different application scenes. And the integrated forming operation is simple, the processing and manufacturing cost is reduced, and the engineering application is wider.

The utility model discloses a pigment grinding device and relates to the technical field of grinding devices. The device structurally comprises a width-adjustable rolling table, a grinding tank, a speed regulator and a plurality of grinding balls mounted in the grinding tank, the rolling table comprises two electric supporting single rollers which are symmetrically arranged in parallel and a connecting and adjusting assembly used for connecting and adjusting the distance between the two electric supporting single rollers. The grinding tank is placed on a roller of the two electric supporting single rollers; and two deviation preventing devices for guiding the two ends of the grinding tank are mounted on one of the electric supporting single rollers. Through the combination of the rolling table, the grinding tank, the deviation preventing device and the protective cover, heat dissipation is good in the grinding process, high-temperature oxidation of a color carrier and auxiliary materials is avoided, the grinding tank can be conveniently taken down at any time for sampling to judge the grinding state, the manual work intensity is low, and the position of the deviation preventing device on the two fixing rods is flexibly adjusted and fixed; limiting rolling contact between the bearing at the end of the step shaft rod and the grinding tank is safe and effective, and the grinding device is suitable for small-batch grinding of painting pigment.