50 results about "Aerosol deposition" patented technology

The invention provides a method for plating an insulating ceramic coating on the surface of a copper / diamond composite material, and relates to the technical field of composite material surface insulating treatment. The method comprises the steps that surface pretreatment is conducted, specifically, the surface of a substrate made of the high-thermal-conductivity copper / diamond composite material is pretreated, and the substrate with the clean surface is obtained; carrying out surface sand blasting treatment: carrying out ceramic particle sand blasting treatment on the substrate with the clean surface to obtain a substrate with a rough surface; and plating an insulating ceramic coating: depositing the ceramic powder subjected to ball milling treatment on a substrate with a rough surface through an aerosol nozzle by virtue of an aerosol deposition device, so as to obtain the substrate with the insulating ceramic coating. According to the method, the copper / diamond composite material with the insulating coating is prepared through surface pretreatment, surface sand blasting treatment and plating of the insulating ceramic coating, wherein the copper / diamond composite material is uniform in component distribution, uniform in performance and capable of improving thermal conductivity and electrical resistivity synergistically; the method is simple and easy to operate, low in cost, short in process, high in efficiency and beneficial to industrial large-scale production and popularization.

The invention discloses an aerosol deposition spraying system for particle online grading and a high-density coating preparing method.The system comprises an aerosol generating chamber, a grading device, a nozzle and a deposition chamber, the grading device is arranged between the aerosol generating chamber and the deposition chamber, and the nozzle is arranged in the deposition chamber; the aerosol generation chamber is used for mixing high-pressure carrier gas and raw material powder to form aerosol; the classifier is used for screening and intercepting powder particles and soft aggregates of which the particle sizes exceed a preset size in the aerosol output by the aerosol generation chamber; the nozzle is used for spraying powder particles in the aerosol screened by the classifier to the surface of a base material in the deposition chamber; and the deposition chamber is used for enabling the raw material powder in the aerosol to deposit a required film layer on the surface of the to-be-sprayed base material through a chemical gas phase reaction in a low-pressure environment so as to realize spraying of the to-be-sprayed base material. The method can effectively reduce the grain size in the coating and improve the density of the coating.

The utility model provides a multi-path spray head of aerosol deposition equipment, which belongs to the field of film material preparation and comprises a shell, convex parts are arranged on the left side and the right side of the shell, extension plates are fixedly connected to the left side and the right side of the bottom of the shell, and an inlet end is fixedly connected to the top of the shell; and the spray head assembly comprises a lateral electromagnetic valve fixedly connected into the convex part and a straight electromagnetic valve fixedly connected to the inner wall of the bottom of the shell, and a four-way pipe is fixedly connected to the inner wall of the top of the shell. According to the aerosol spraying device, aerosol can be sprayed to a plurality of substrates at the same time through the arranged spray head assembly, whether different spray heads spray or not can be independently controlled, and when the positions of the substrates are different, the positions of the spray heads on the side edges can be adjusted so as to meet the requirement that the actual positions of the substrates are different; the multi-path spray head structure is high in flexibility, and the working speed and the working efficiency of existing aerosol deposition equipment can be effectively improved.

The application discloses a concentration monitoring device for an aerosol deposition process, and relates to the technical field of aerosol detection.The concentration monitoring device comprises a casing and a speed regulation mechanism, the speed regulation mechanism comprises an aerosol inlet pipe and an aerosol outlet pipe, the aerosol outlet pipe is arranged above the aerosol inlet pipe, the axis of the aerosol inlet pipe and the aerosol outlet pipe are collinear, the cross-sectional radius of the inlet end of the aerosol outlet pipe is larger than the cross-sectional radius of the outlet end of the aerosol inlet pipe, a test area is arranged between the aerosol inlet pipe and the aerosol outlet pipe, the aerosol inlet pipe comprises a first diffusion pipe, the cross-sectional radius of the first diffusion pipe increases from bottom to top, the aerosol outlet pipe comprises a second contraction pipe, the cross-sectional radius of the second contraction pipe decreases from bottom to top, the inlet end of the aerosol inlet pipe penetrates through the bottom of the casing, and the outlet end of the aerosol outlet pipe penetrates through the upper end of the casing.The special structural design of the aerosol inlet pipe and the aerosol outlet pipe is used to realize accurate regulation of the flow speed of aerosol by arranging the speed regulation mechanism.

The invention relates to a method for preparing a substrate activation-assisted aerosol deposition film, which comprises the following steps of: activating a substrate before the aerosol deposition film, namely sequentially performing plasma activation treatment of argon, oxygen and nitrogen at 25 + / -1 DEG C and under the pressure of 50-100Pa, removing organic matters on the surface by argon plasma activation, and removing organic matters on the surface by nitrogen plasma activation. A weak boundary layer is removed to form a certain rough structure, so that the surface area is increased; oxygen plasma generates a large number of polar groups such as hydroxyl on the surface of the substrate; nitrogen plasma nitrides the base material to generate Al-N bonds, so that the surface energy is improved, and a strong interface is formed; experiments prove that compared with an unactivated base material, the bonding strength of the coating subjected to aerosol deposition and the surface of the base material is improved to 33.5 MPa from 17.2 MPa, and an SEM pattern shows that the interface between the activated base material and the coating is clear, the coating is uniform, and the porosity is low.

The invention discloses a test system and a test method for measuring entrained liquid drop and aerosol deposition. The test system comprises a carrier gas generation pipeline, an aerosol distribution pipeline, a mixing pipeline, an entrained liquid drop generation and aerosol washing device, an entrained liquid drop size measurement device and an entrained liquid drop and aerosol filtering device, the carrier gas generation pipeline and the aerosol distribution pipeline are both connected with the mixing pipeline, the carrier gas generation pipeline provides carrier gas with different pressures and flows, the aerosol distribution pipeline provides water-insoluble aerosol with different concentrations, and the carrier gas and the aerosol are uniformly mixed in the mixing pipeline; the mixed pipeline is introduced into the entrained liquid drop generation and aerosol washing device, so that the carrier gas carrying the aerosol is washed and filtered to form entrained liquid drops in which the aerosol is deposited, and the entrained liquid drops enter the entrained liquid drop size measurement device for measuring the size distribution of the entrained liquid drops; and the liquid drops enter the entrained liquid drop and aerosol filtering device for aerosol and entrained liquid drop filtering retention.

The application discloses an aerosol flushing simulation detection device and a detection method thereof. The device comprises a water supply device, a flow distribution device, an experimental box, a detection plate and a solution sampling device. The water supply device is connected with the flow distribution device. The top of the experimental box is provided with a water inlet, and the bottom is provided with a water outlet. The flow distribution device is connected with the experimental box through the water inlet. The solution sampling device is connected with the experimental box through the water outlet. The detection plate is attached with aerosol and is arranged in the experimental box. The inner wall of the containment vessel with aerosol deposition and the surface of the structure in the containment vessel are simulated by the detection plate. The water supply of the water supply device is dispersed by the flow distribution device to form a water film flow, so as to simulate the flushing of the aerosol by the water film flow in the containment vessel. Finally, the solution sampling device is used for sampling, and the flushing of the aerosol by the water film flow in the containment vessel is simulated.

The invention relates to an airborne radioactive transport simulation test system and method for passive containment accidents. The system comprises an aerosol particle injection subsystem, an aerosol transport and deposition subsystem, a flow field measurement subsystem and an aerosol deposition and transport measurement subsystem. Through the design of a plurality of compartments (an aerosol particle injection compartment, a first transport deposition compartment and a second transport deposition compartment) and a connecting pipeline, the leakage diffusion and transport path of airborne radioactive substances in a passive containment accident can be really simulated; the compartments and the connecting pipelines are detachable, so that quick assembly and maintenance are facilitated; by combining the deposition wall surface and the coating, the test can be repeated for multiple times and deposition data can be collected; and the three-dimensional dynamic behavior of the aerosol is accurately captured through the flow field measurement subsystem. The method is suitable for source item analysis and aerosol diffusion research of a passive containment accident scene.

The application discloses a water vapor jet alkali metal reaction chemical flame section visualization measurement device and method, and belongs to the technical field of alkali metal reaction and combustion visualization experiment. The device comprises a glove box, a reaction container, a steam injection assembly, a double-layer transparent window observation assembly and a data acquisition assembly. The double-layer window is sequentially provided with a transparent oxide crystal hot side main window, an inert gas interlayer and a cold side protection window from inside to outside. An isolation layer is formed between the hot side and the cold side window by the inert gas in the interlayer, so as to reduce the shielding of imaging caused by splashing and aerosol deposition. The application can be used for experimental verification and safety evaluation of the alkali metal-water vapor reaction mechanism under the condition of the sodium-cooled fast reactor steam generator heat transfer tube rupture accident.

Constituent parts of a plasma processing chamber are provided. The yttria coating is formed on the surface of the part body. The yttria coating is deposited by aerosol deposition and annealed. The yttria coating is at least 95% by weight pure yttria.

Provided herein is a method that utilizes the production of photocatalytic nanoparticles in situ by flame spray pyrolysis (FSP) and the deposition of the nanoparticles on a substrate via aerosol deposition to produce a photocatalytic nanoparticle film on the substrate, a process of subsequently immersing the photocatalytic nanoparticle film with a polymer solution or a liquid polymer precursor material to form a composite layer. The method used results in a composite layer comprising an osmotic network of photocatalytic nanoparticles in a polymer matrix wherein the composite layer has enhanced durability and remains active after several irradiation cycles, which is an improvement to currently known coatings.

The present invention relates to the manufacturing of devices that comprise films having piezoelectric, pyroelectric and / or ferroelectric properties, obtained at room temperature by aerosol deposition (AD). Advantageously, the devices according to the invention are functional without requiring subsequent heat treatment, and can be produced on various types of substrates, rigid or flexible, with varied thicknesses, whether in a thin layer (< 10 μm) or a thick layer (> 10 μm). More particularly, the invention relates to ceramic-polymer composite films having piezoelectric, pyroelectric or ferroelectric properties, obtained by AD, wherein the rate of polymer integrated into the film is controlled in order to obtain films that are functional immediately after deposition. The interconnectivity of the phases and the diameter of the ceramic grains are also controlled, ensuring that the desired functional properties are maintained. The invention further relates to an AD method for producing such devices.

The invention belongs to the technical field of coating preparation, and provides a gas-assisted aerosol deposition device and a deposition method. The gas-assisted aerosol deposition device comprises a deposition chamber, a clamping mechanism, a supporting table and a spraying mechanism. The clamping mechanism is arranged in the deposition chamber and used for clamping a base material, the supporting table is arranged in the deposition chamber and can move in the Y direction, and the spraying mechanism is arranged on the supporting table and located below the base material; the spraying mechanism comprises a spraying assembly capable of moving in the X direction, and the spraying assembly blows gas to the surface of the base material for pretreatment and then sprays aerosol particles to the surface of the base material. According to the spraying assembly, the to-be-sprayed area on the base material is subjected to gas purging to achieve pretreatment, aerosol particles with weak binding force on the area are blown off, so that the aerosol particles sprayed by the subsequent spraying assembly can be tightly combined with the base material or a previous coating, the binding force of the coating and the base material is improved, and the coating quality is improved. The finished product quality is improved.

The invention relates to the technical field of gas sensors, in particular to a hydrogen sensor for lithium battery safety monitoring and a sensitive material preparation method, and aims at solving the problems that an existing hydrogen sensitive material is low in recovery speed and insufficient in sensitivity. Tungsten trioxide is adopted as a matrix of the sensitive material, compared with common materials such as tin oxide and zinc oxide, the sensitive material has the response characteristic of being more sensitive to hydrogen, the intrinsic sensitivity and the reaction rate of the material to hydrogen are improved through the synergistic dual sensitization effect of K + bulk phase doping and palladium nanoparticle surface catalysis, and the sensitivity of the material to hydrogen is improved. A sacrificial template is introduced into a tungsten trioxide sensitive layer prepared by aerosol deposition, and a segmented annealing process is adopted, so that a controllable porous structure is constructed while sufficient removal of the template and film continuity are ensured, and the sensitivity and response / recovery performance of the hydrogen sensor are improved; the sensor is suitable for lithium ion battery thermal runaway safety monitoring scenes with extremely harsh early warning requirements.

The invention relates to an aerosol deposition test method and system for a containment in a nuclear power station. Comprising the following steps: determining a target boundary condition of an aerosol deposition test of a containment in a nuclear power plant and an inertial collision deposition rate under a condensation-free condition; obtaining a second target boundary condition based on the target boundary condition; based on a second target boundary condition, performing a steam-aerosol impact jet test to obtain an aerosol deposition rate under the combined action of steam inertial collision and droplet precipitation; based on the inertial collision deposition rate under the condensation-free condition and the aerosol deposition rate under the combined action of steam inertial collision and droplet precipitation, obtaining the aerosol deposition rate corresponding to the droplet precipitation phenomenon; obtaining a third target condition based on the second target boundary condition; based on the third target boundary condition, a steam-aerosol impact jet test is conducted, and the aerosol deposition rate corresponding to wall surface condensation is obtained. By adopting the method, the retention mechanism and the particle size evolution rule of the aerosol can be comprehensively and truly reflected.

This invention provides a method for coating an insulating ceramic coating onto the surface of a copper / diamond composite material, relating to the technical field of surface insulation treatment for composite materials. The method includes surface pretreatment: pretreating the surface of a high thermal conductivity copper / diamond composite substrate to obtain a clean substrate; surface sandblasting: sandblasting the clean substrate with ceramic particles to obtain a rough substrate; and coating with an insulating ceramic coating: depositing ball-milled ceramic powder onto the rough substrate through an aerosol deposition device using an aerosol nozzle to obtain a substrate with an insulating ceramic coating. This invention's method, through surface pretreatment, surface sandblasting, and coating with an insulating ceramic coating, prepares copper / diamond composite materials with uniform composition distribution, uniform performance, and synergistically improved thermal conductivity and resistivity. The method is simple to operate, low in cost, short in process, and high in efficiency, facilitating large-scale industrial production and promotion.

The invention discloses aerosol deposition equipment with a function of fully covering a complex-shaped substrate, and relates to the technical field of aerosol deposition equipment, the aerosol deposition equipment comprises a deposition equipment main body, and a control panel, a fixed block and a flip cover which are arranged at the top end of the deposition equipment main body, the fixed block is embedded in the top end of the deposition equipment main body, and the flip cover is embedded in the fixed block. The edge of the fixing block is rotationally connected with the edge of the flip; the gravity center of a material in a complex shape deviates from the circle center of the annular groove, so that the material on the first fixing ring has a certain inclination angle, and substrate covering is conveniently conducted on the upper surface and the lower surface of a material substrate; the material substrate of the first fixing ring can be sprayed through the rotating first fixing ring and the air outlet floating up and down, so that aerosol is more evenly sprayed to the two surfaces of the material substrate, the material substrate in a complex shape can be completely covered, and the working time of the deposition equipment is short.

The invention discloses an ultrasonic-assisted aerosol deposition device and a coating preparation method. The ultrasonic-assisted aerosol deposition device comprises a powder ultrasonic treatment device and an aerosol ultrasonic treatment device, the powder ultrasonic treatment device is used for carrying out ultrasonic pretreatment on the raw material powder, so that the surfaces of powder particles of the raw material powder are broken through the cavitation effect of ultrasonic waves, and the dispersity of the powder particles in the raw material powder is improved; the aerosol ultrasonic treatment device is used for conducting ultrasonic treatment on aerosol in an aerosol conveying pipeline so as to improve the dispersity of powder particles in the aerosol through the cavitation effect of ultrasonic waves. Aerosol in the aerosol conveying pipeline is obtained by mixing raw material powder subjected to ultrasonic treatment through the powder ultrasonic device and high-pressure carrier gas. The uniformity, compactness and binding force of the coating can be remarkably improved, and the coating is efficient and free of pollution.

A method for manufacturing a multilayer ceramic circuit board, the method comprising: a step (I) for forming a first wiring layer containing copper on a core substrate selected from the group consisting of a ceramic substrate and a glass substrate; and a step (II) for forming, on the first wiring layer, a unit layer including a ceramic insulating layer containing a ceramic material and a second wiring layer containing copper, the step (II) including a step (II-1) for forming the ceramic insulating layer by an aerosol deposition method, a step (II-2) for flattening the surface on the side opposite to the core substrate of the ceramic insulating layer formed by the aerosol deposition method, and a step (II-4) for forming the second wiring layer on the flattened surface of the ceramic insulating layer.

The present invention specifically relates to a collection device that can be used in aerosol deposition experiments, which solves the problem of large experimental errors caused by airflow disturbances in current experiments. The present invention is used to be placed in an experimental cabin that provides a rain or snow environment, and includes a sample placement cabinet, a placement rack, a sampling tray, an electric push rod assembly, a drive assembly, a power supply and a control terminal; multiple placement racks are arranged in the sample placement cabinet to form a multi-layer structure; each placement rack corresponds to a sampling tray, and the electric push rod assembly is installed inside the sample placement cabinet. The electric push rod assembly is used to remove the sampling tray from the placement rack and move it to the outside of the sample placement cabinet when sampling, and to put the sampling tray back on the placement rack after sampling is completed, as well as to control the opening and closing of the sample placement cabinet; the output end of the drive assembly is connected to the electric push rod assembly; the output end of the control terminal is connected to the input end of the drive assembly; and the power supply is connected to the control terminal and the drive assembly respectively.

The application discloses a high-reliability insulating coating based on aerosol deposition and a preparation process thereof, and relates to the technical field of insulating coatings. The application deposits inorganic powder on the surface of a copper wire through aerosol deposition technology, and cooperates with a heat treatment process to prepare a high-reliability insulating coating. Through accurate regulation of the powder particle size and deposition parameters, the dielectric strength and electrical performance of the insulating layer are significantly improved, the risk of leakage current is reduced, the corrosion resistance, insulation and mechanical strength of the copper wire are effectively improved, the damage of traditional high-temperature processes to the performance of the copper wire is avoided, and the process is flexible. Mechanical anchoring formed through high-speed impact of aerosol deposition ensures the stability of the coating in a complex environment, has strong adhesion, and effectively prevents the coating from peeling off.

A gas-insulated switching device comprises a conductor held by an insulating spacer within a sealed container filled with insulating gas. An insulating layer is applied to the surface of the curved conductor within the device. This insulating layer is formed by laminating an insulating material to the conductor's surface using either a thermal spraying or an aerosol deposition process. Ceramic particles are typically used as the insulating material. The insulating layer is then impregnated with an insulating resin.

An embodiment of the present invention provides a method for manufacturing a coating layer, comprising the steps of: preparing an object to be coated; forming, on the object to be coated, an aluminum oxide-based, yttrium oxide-based or zirconium oxide-based first coating layer by means of aerosol deposition; and forming, on the first coating layer, an aluminum oxide-based, yttrium oxide-based or yttrium fluoride-based second coating layer by means of physical vapor deposition, wherein the second coating layer includes an array of columnar crystals that extend perpendicularly to the surface of the object to be coated.

Apparatus and methods are disclosed which apply inorganic particles to a plugged honeycomb body comprising porous walls, an inlet end and an outlet end. The apparatus comprises a Venturi tube through which the particles flow into a duct system. Filtration articles comprise: a plugged honeycomb body; inorganic deposits disposed within the plugged honeycomb filter body having a porosity in a range of greater than 95% to less than or equal to 99.9% and an average thickness in a range of greater than or equal to 0.5 μm to less than or equal to 50 μm; and a clean filtration efficiency of greater than or equal to 85% as measured by a smoke filtration efficiency test.

The present invention relates to the fabrication of devices comprising films with piezoelectric, pyroelectric, and / or ferroelectric properties, obtained at room temperature by Aerosol Deposition (AD). Advantageously, the devices according to the invention are functional without requiring further heat treatment and can be produced on various types of substrates, rigid or flexible, with varying thicknesses, whether as a thin film (< 10 µm) or a thick film (> 10 µm). More particularly, the invention relates to ceramic-polymer composite films with piezoelectric, pyroelectric, or ferroelectric properties, obtained by AD, in which the polymer content is controlled to obtain films that are directly functional after deposition. The interconnectivity of the phases and the diameter of the ceramic grains are also controlled, ensuring the maintenance of the desired functional properties.The invention further relates to a method AD for the production of such devices.

The high-hardness aerosol deposition coating equipment comprises a main body unit which comprises a material containing frame and a protection frame fixedly connected to the upper surface of the material containing frame, and a top plate is connected to the upper surface of the protection frame in an embedded mode; an inner ring gear is utilized, an output shaft of a driving motor drives a driving rubber wheel, the driving rubber wheel is further made to make contact with one side of a rotating rubber wheel, an inner ring gear ring and an outer ring gear ring of equipment integrally rotate, and then an inner outer ring gear rotates while rotating; the outer ring gear drives the inner ring gear in the equipment, so that the outer disc plate and the inner disc plate rotate at the same time, the inner ring gear drives and rotates the inner disc plate, and the inner disc plate and the outer disc plate can be adjusted at different rotating speeds in the process of rotating at the same time to a certain extent; therefore, the aerosol is forced to be dispersed through differential speed under the centrifugal force.

The invention relates to a uranium hexafluoride leakage experiment weighing and sampling device and an analysis and calculation method. The uranium hexafluoride leakage experiment weighing and sampling device comprises a monitoring chamber and weighing and sampling devices arranged on the bottom face, the side face and the top face in the monitoring chamber. The bottom surface of the monitoring chamber is parallel to the ground; and the sampling device is used for measuring the deposition and adhesion amount of the aerosol on the ground, the wall surface and the top surface. The method can be used for simulating measurement of the aerosol removal factor during uranium hexafluoride leakage, basic parameters after uranium hexafluoride leakage are obtained, and a basis is provided for nuclear and radiation safety analysis of the accident.

A component of a plasma processing chamber is provided. A yttria coating is formed on a surface of a component body, wherein the yttria coating is deposited by aerosol deposition and is annealed, wherein the yttria coating is at least 95% pure yttria by weight.

An aerosol transport simulation method for a nuclear facility pipeline system comprises the following steps: carrying out initial flow field modeling and calculation based on an Euler framework, tracking particle motion by using a particle deposition module under a Lagrange framework, generating particle deposition distribution, updating flow field boundary conditions, and calculating the particle deposition distribution. The method comprises the following steps: simulating an actual dynamic working condition by disturbing airflow, calling a particle resuspension module to judge particle behaviors, integrating resuspension particles and disturbing airflow injection particles, and generating a mixed particle source item; recursively calling a particle deposition module to process a mixed particle source item; when new disturbance airflow injection exists, the disturbance airflow flow field is reset to particle tracking calculation again, and finally a simulation result is counted and output. According to the invention, through a recursive feedback mechanism and considering the probabilistic resuspension behavior, multiple cyclic processes of deposition-resuspension-redeposition of the aerosol are captured, and the whole process and high precision simulation of the migration behavior of the aerosol are realized.

The invention provides a flat top distribution multi-scale aerosol jet printing method. According to the method, on the basis of anisotropic nozzle structure design of fluid dynamics, wide aerosol jet flow with the specific width and stable collimation is generated, the near-Gaussian deposition mode of traditional cylindrical aerosol jet flow is broken through, and high-flux and multi-scale flat-top deposition is achieved. According to the method, processes such as a programmable scanning path, multi-material in-situ mixing and deposition, dynamic regulation and control of jet flow resolution, curved surface conformal printing and the like are combined, so that aerosol deposition has high flexibility and adaptability in the aspects of multi-scale structure construction, composite material distribution regulation and control and complex three-dimensional surface in-situ forming; and the high-efficiency integrated manufacturing requirements of advanced flexible electronics, functional films, gradient structures and curved surface conformal devices in the future are met.