15 results about "Aerosol deposition" patented technology

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 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.

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 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.

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.

This invention relates to the field of humidity-sensitive materials technology, specifically to a ceramic-based high-sensitivity humidity-sensitive material and its preparation method, addressing the problems of low humidity sensitivity and slow response time in existing humidity-sensitive materials. Using niobium pentoxide and titanium as raw materials, core-shell powder is prepared via a two-step hydrothermal method, followed by electrochemical cathodic polarization to induce high oxygen vacancy concentration in the shell layer and optimize the heterojunction interface state. The material is prepared using a sol-gel method combined with high-temperature solid-state reaction, and processed via Li… + With Al 3+ Ti in the TiO2 lattice 4+ The dual acceptor cooperative substitution induces the generation of high-density oxygen vacancies and introduces Li + An ion-conducting channel is formed by spraying an aerosol deposition film and then annealing it under nitrogen protection to obtain a moisture-sensitive material. This moisture-sensitive material has a low response time, low hysteresis, and excellent long-term stability. Through the synergistic effect of the core-shell heterojunction barrier amplification effect and dual acceptor defect engineering, the sensitivity and response speed of the ceramic-based moisture-sensitive material are significantly improved.

The application belongs to the technical field of radiation protection, and particularly relates to a method and device for obtaining radioactive aerosol data in a closed space. The method comprises the following steps: obtaining a pre-established aerosol diffusion model and an aerosol deposition model; the aerosol diffusion model and the aerosol deposition model are obtained according to the properties of radioactive aerosol and the environmental parameters and ventilation system parameters of the closed space, and the radioactive decay, physical deposition and chemical deposition factors of the radioactive aerosol are considered; and the space radioactive aerosol concentration and the ground radioactive aerosol concentration in the closed space are obtained according to the aerosol diffusion model, the aerosol deposition model, the parameters of the closed space and the properties of the radioactive aerosol. The method solves the problem of dependence of radioactive aerosol on sampling measurement, and provides data for on-site radiation protection.

The invention relates to a thermal field-assisted preparation method of a ceramic film coating, which is characterized in that on the basis of the existing aerosol deposition method, a step of carrying out thermal treatment on powder particles of aerosol is added, and after the powder particles pass through a thermal field before deposition, the microstructure is changed; original fine seed crystal grains with weak binding force are fused, grown and rigidly connected after being calcined to form seed crystal grains with larger particle size, the calcined powder particles and seed crystal grains are changed into irregular polyhedral shapes, the porosity of the prepared ceramic film coating is reduced, and the compactness is improved; the invention further relates to thermal field auxiliary aerosol deposition spraying equipment, the heating device is arranged on the portion, between the aerosol generating chamber and the deposition chamber, of the ceramic tube, and the thermal field is formed on the inner wall of the ceramic tube through thermal radiation of the ceramic tube. The heating temperature and time of the powder particles can be controlled by regulating and controlling the heating power of the heating wire and the length of the ceramic tube, so that the microstructure of the powder particles is regulated and controlled.

A multilayer solid electrolyte separator (3) for a battery cell (1, 30) comprises at least two layers (3a-h), wherein the at least two layers (3a-h) are deposited layer by layer by means of aerosol deposition, and wherein one (3a) of the at least two layers (3a-h) comprises an ion conduction function and a separation function.

A multilayer solid electrolyte separator (3) for a battery cell (1, 30) comprises at least two layers (3a-h), wherein the at least two layers (3a-h) are deposited layer by layer by means of aerosol deposition, and wherein one (3a) of the at least two layers (3a-h) comprises an ion conduction function and a separation function.