65 results about "Joule heating" patented technology

This invention discloses a method for efficiently extracting rare earth elements from mine sediment based on flash Joule heating technology, thus establishing a rare earth element extraction technology field. The method comprises the following steps: (1) drying and grinding the mine sediment to be extracted to obtain rare earth precursor powder; (2) heat-treating the rare earth precursor powder using flash Joule heating under a protective atmosphere, followed by cooling and grinding to obtain flash Joule-heat-treated rare earth powder; (3) activating the flash Joule-heat-treated rare earth powder in an acid treatment solution, filtering after activation, and collecting the filtrate to obtain a rare earth element extract. Using this invention, efficient extraction of rare earth resources from mine sediment can be achieved.

The application discloses a high-load porous carbon-coated integrated electrode constructed by one-step super-fast Joule heating and a preparation method and application thereof. The electrode comprises a current collector and an active material layer, and the active material layer has a three-dimensional porous carbon-coated integrated structure composed of an active material, a conductive agent and an in-situ generated carbon layer. The preparation method is to perform super-fast Joule heating treatment on the current collector coated with an electrode precursor wet film, and to synchronously complete solvent evaporation pore forming, binder / conductive agent carbonization coating and interface fusion in one step within a second. The method greatly simplifies the process, and the prepared electrode has high active material loading (active material surface loading≥20 mg / cm 2 ), rich ion transmission channels and excellent interface electron / ion conductivity, effectively solves the problem of slow charge transmission kinetics in high-load electrodes, and significantly improves the rate performance and unit area capacity of the battery.

This application relates to the field of semiconductor lighting driving control technology, and discloses a method for compensating for the luminous stability of a copper wire lamp under low-temperature conditions. This method injects a diagnostic current into the copper wire lamp during the turn-off time slot of a single-cycle driving sequence to obtain the transient voltage decay sequence of the light-emitting device. Based on this sequence, it decouples and calculates the equivalent ambient temperature and the mechanical stress deviation caused by the cold shrinkage of the packaging material. When the mechanical stress deviation exceeds a safety threshold, it calculates the corresponding active heat injection waveform parameters. Based on these parameters, it performs charge equivalence conversion, corrects the loss in the steady-state luminous time of the current cycle, and reconstructs and outputs a composite driving waveform including the heat injection and steady-state luminous stages. This invention improves the structural reliability and luminous stability of the device without adding external sensors by detecting and utilizing Joule heating to release low-temperature mechanical compressive stress through electrical signal quantization and Joule heating.

The application discloses a kind of heating and heat dissipation bidirectional personal thermal management fabric and preparation method thereof, belong to thermal management fabric design technical field.The main surface of fabric is sprayed with a layer of amorphous structure photonic crystal coating, the reflectivity of fabric in visible light near infrared band and the emissivity in mid-infrared band are improved, the physical coloring of no thermal burden is realized on the surface of fabric to meet the demand of diversification and beauty of textile, the MXene nanosheet of low emissivity is sprayed on the other side of fabric, the passive radiation heating performance, photothermal conversion performance and joule heating performance of MXene are used to realize the heating thermal management of fabric, the fabric of the application realizes dynamic personal thermal management, that is, compared with the temperature of simulated human skin, the temperature can be reduced by 10.2 DEG C in summer, and the temperature can be increased by 21.4 DEG C in winter by combining the heating effect of multiple modes, to provide greater flexibility for personal thermal management under different environmental conditions.

Interconnect via metal-insulator-metal (MIM) fuse for integrated circuitry. Two electrode metallization features, which may be within a backend of an IC die, are coupled through a via comprising a fuse material layer. The fuse material layer passes a non-zero leakage current when a lower read voltage is applied across the electrode metallization features, and irreversibly forms an open circuit when a higher programming voltage is applied across the electrode metallization features. The fuse material layer may be a compound of a metal and oxygen and be sufficiently thin to ensure a significant leakage current at the read voltage. Joule heating of the fuse material layer may induce a void between the electrode metallization features as the leakage current through the fuse material layer increases under higher voltages, creating an open circuit.

The application discloses a metal-ceramic connecting method based on core-shell micro-element resistance network metallization and high-entropy metallized ceramics, and relates to the technical field of ceramic matrix composite and metal connection. The method comprises the following steps: core-shell composite powder preparation; pre-layer preparation; controlled path joule heating metallization; and low-stress welding connection. The application solves the problems of local overheating and non-uniform conductivity of insulating ceramic powder in joule heat treatment, utilizes the un-melted ceramic core as a physical "pinning point" to build a rigid support, and makes the solder penetrate to form a strong and tough structure of "reinforced concrete" in brazing, so that the volume shrinkage of the solder of the welding seam is reduced, the problem of thermal stress mismatch of the joint is effectively solved, and reliable connection of large-size ceramic metal with high strength and toughness and low residual stress is realized.

The present application relates to mesophase pitch preparation field, disclose a kind of method for preparing mesophase pitch by joule heating, the method comprises: the heating treatment of pitch raw material by joule, cooling, obtain mesophase pitch;Wherein, the temperature of heating is 3600-3700 ℃.The method has the characteristics of high heating efficiency, short heating time, can quickly remove volatile substances in pitch raw material, quickly obtain mesophase pitch, the whole process of operation is economic, environmental protection, green and low carbon.

This invention belongs to the field of solid waste treatment and resource utilization technology, and discloses a surfactant elution and biochar synergistic electro-osmotic dewatering process for oily sludge and its application. Addressing the problems of high water content (>96%), strong insulation due to oil film coating, and difficulties in conventional dewatering of oily sludge, this invention adopts a coupled route of "liquid phase modification - mechanical pre-dewatering - electro-osmotic deep drying". First, surfactants are used to remove the oil film on the surface of sludge particles; then, biochar is added to construct a rigid conductive framework, and the water content is reduced to 80%~85% to form a sludge cake through flocculation and mechanical pressure filtration; finally, deep dewatering is carried out under the synergistic effect of electric field and mechanical pressure. This invention uses biochar to solve the problems of high resistance and high energy consumption of oily sludge, while combining Joule heating effect to assist in viscosity reduction. The water content of the treated sludge can be reduced to below 60%, and some oil is recovered during dewatering. It features high treatment efficiency, low energy consumption, long electrode life, and high resource utilization.

A nitrogen-doped carbon-supported high-entropy alloy nanoparticle electrocatalyst, its preparation method, and its application are disclosed. The catalyst uses nitrogen-doped carbon as a support, on which high-entropy alloy nanoparticles, a single-phase solid solution formed by five metal elements—platinum, copper, iron, cobalt, and nickel—are loaded. The preparation method mainly includes: first, preparing the nitrogen-doped carbon support; then, mixing it with a metal salt precursor and drying it; finally, subjecting the mixture to instantaneous high-temperature thermal shock treatment using Joule heating technology, which forces the various metal atoms to dissolve mutually during ultra-rapid heating and cooling, forming a homogeneous alloy that is firmly loaded onto the support. This method effectively solves the problems of easy phase separation, long cycle, and easy agglomeration of nanoparticles in traditional high-entropy alloy synthesis. The prepared catalyst exhibits excellent catalytic activity in the electrochemical hydrogen evolution reaction, reaching 10 mA / cm² under acidic conditions, for example. 2 The required current density is only 13 mV overpotential. This invention offers a simple and efficient process, providing a new approach for the preparation of high-performance, low-cost electrocatalysts.

A method of bonding two or more substrates, where the method comprises placing two or more substrates in a vacuum chamber, generating a vacuum in the vacuum chamber, compressing the substrates between opposing electrodes of a spark plasma bonding system to apply a target compression pressure, applying electrical current through the substrates via the electrodes to generate localized Joule heating, and maintaining the target compression pressure, a target bonding temperature for a target time duration sufficient to effect bonding between the substrates.

This invention belongs to the field of metal material joining technology, specifically relating to a high-strength joining method for 6000 series medium-strength aluminum alloys. The method includes: surface treatment and clamping of the end faces of the 6000 series medium-strength aluminum alloy workpieces to be joined; performing cold pressure welding or electro-pulse assisted pressure welding on the workpieces to be joined, causing plastic deformation of the end faces and forming a joint; subsequently performing electro-pulse aging treatment on the joint, or performing electro-pulse solution treatment followed by electro-pulse aging treatment. This invention utilizes the grain refinement, dislocation multiplication, and work hardening generated by the plastic deformation of pressure welding, combined with the Joule heating effect, electroplastic effect, and electron wind effect generated by electro-pulse treatment, to promote the diffusion of Mg and Si atoms and the precipitation of the Mg2Si strengthening phase. Through the above method, welding defects and joint softening problems can be reduced, and the strength of 6000 series medium-strength aluminum alloy joints can be improved. It is suitable for solid-state joining of 6000 series aluminum alloy wires, bars, or plates such as 6061, 6063, and 6082.

This invention relates to the field of metal wire processing control, and discloses a continuous drawing and annealing production control system for oxygen-free copper wire. The system includes a data acquisition module for collecting basic operating conditions, tension reference, and environmental reference data; a feedforward control module that uses incremental enthalpy calculation to generate an annealing voltage setpoint signal to control the annealing power supply; a collaborative cooling module that combines electrical Joule heating and mechanical enthalpy increments to calculate the total heat at the nodes and generate commands to control the cooling water frequency converter and regulating valve; a bidirectional decoupling module that obtains the effective slip factor and slip deterioration rate, and generates pneumatic back pressure pulses and power intervention signals to perform bidirectional decoupling; and a winding control module that generates commands to control the end winding and wire-laying motor. This invention, by establishing an electromechanical feedforward and bidirectional decoupling mechanism, quantitatively compensates for abnormal mechanical heat and progressively suppresses micro-slippage of the conductive wheel, thus avoiding overheating and arcing / breakage defects in the oxygen-free copper wire.

This invention discloses a novel method for preparing and applying protonated layered iridium oxide (H-IrO2) nanosheets. The iridium oxide nanosheets possess a typical layered structure, with a large number of protons accommodating the interlayer spaces. The in-plane layers exhibit abundant metallic iridium vacancy defects and localized disorder. The preparation method includes: 1) alkaline hydrolysis of an iridium metal salt to obtain an amorphous iridium oxide precursor; 2) Joule heating treatment to obtain the layered iridium oxide nanosheet structure; and 3) acidic proton exchange to obtain protonated layered iridium oxide nanosheets. This novel layered structure exhibits high activity and excellent stability in the anodic oxygen evolution reaction of acidic water electrolysis. Its unique structure and superior performance make it a promising alternative to existing commercial catalysts, playing a crucial role in large-scale water electrolysis.

The application provides a kind of reinforcement learning driven intelligent temperature control joule heating amplification device and method.The device includes scalable power modulation module, modular reaction cavity and multi-point electrode array structure, which can realize flexible expansion of reaction volume, electrode number and heating area, and is suitable for different preparation scale requirements.The application is based on COMSOL-Simulink joint simulation to build joule heat-electricity coupling model, and introduces reinforcement learning intelligent control method to complete control strategy training in simulation environment;During device operation, temperature feedback is obtained through multi-point temperature sensor, and intelligent controller adaptively adjusts pulse voltage amplitude, width and frequency to realize multi-point electrode collaborative heating and high-precision temperature control.This method does not require manual parameter setting, has good robustness and scalability, and can significantly improve temperature field uniformity, energy efficiency and large-scale preparation capacity.

Cryopreserved biomaterials are rewarmed with resistive heating methods. The method is scalable to large number of specimens. The cryopreserved biomaterial is in thermal contact with an electrical conductor. The electrical conductor is connected to a generator capable of discharging a tunable voltage pulse. The voltage pulse is tuned to deliver the selected heat to the conductor to rapidly and uniformly rewarm the cryopreserved biomaterial.

This invention discloses an electromagnetic pulse treatment device and method for zoned customized reinforcement of metal welded joints, belonging to the technical field of post-weld modification treatment of metal welded joints. It includes an upper mold, a lower mold, welded sheet metal, an insulating baffle, a magnet collector, a fixing device, a discharge coil, and a pulse discharge circuit. The heat-affected zones on both sides of the welded sheet metal are first subjected to transient pulse current treatment near the weld seam by induced eddy currents. The weld seam is then subjected to a high-energy pulsed strong magnetic field collected by the magnet collector. Furthermore, due to the contraction effect of the induced eddy currents and the diffusion effect of the pulsed strong magnetic field, both the weld seam and the heat-affected zone are further affected by the current and magnetic field during the attenuation of the electromagnetic energy field. This invention induces intense Joule heating, shock waves, and electromagnetic energy effects at the interface of heterogeneous joints through high-energy electromagnetic pulses, thereby instantly achieving the precipitation of nano-reinforcing phases and eliminating defects. It possesses advantages such as high flexibility, high efficiency, high performance, and high reliability.

An improved desiccant rotor is provided that uses a three-dimensional printed joule heating structure to heat the desiccant directly, thereby improving its efficiency. The heating structure is printed as the substrate itself using additive manufacturing techniques, allowing for unique rotor configurations and better performance in a smaller size. The desiccant is coated on and within the porous heating structure and is in direct contact with it. The heating structure generates heat that is transferred directly to the desiccant, resulting in better moisture removal. The porosity and configuration of the heating structure can be varied to achieve different heating levels and rotor designs. In one embodiment, the desiccant is mixed directly into the conductive ink used to print the heating structure for even greater heat flux. The desiccant rotor may also include sensors and controllers to monitor humidity and adjust heating levels accordingly to maintain consistent dehumidification.

The application provides a method for promoting millisecond-level rapid conversion of biomass material to MXene material by using flash joule heating technology. Biomass material and metal powder are used as precursors, a uniform mixture is formed after mixing and grinding, and then a transient high voltage is applied between two electrodes to trigger millisecond-level ultrafast heating to a reaction temperature. Under the extreme transient thermal field, the biomass is instantaneously pyrolyzed and reconstructed into high-activity amorphous carbon, and the metal component is simultaneously activated; the ultra-high heating rate and non-equilibrium environment significantly strengthen the atomic interdiffusion of the carbon / metal interface, driving the in-situ generation of MXene. This method breaks through the limitations of traditional multi-step processes, realizes the direct conversion of biomass to MXene, has the advantages of high efficiency and low cost, provides a new paradigm for the high-value utilization of biomass, and has a wide application prospect in the fields of energy storage, catalysis and adsorption.

This invention discloses a knowledge graph-based method and system for processing data on the impact of distribution network line losses, belonging to the field of data processing technology. The method includes: establishing a spatial coordinate system for the distribution network and dividing it into sub-regions; performing electrothermal coupling reasoning based on the knowledge graph to obtain dynamically corrected impedance and electricity consumption characteristic coordinates; calculating spatial drift dispersion and spatial drift penalty coefficient based on coordinate offset distance; obtaining the initial line loss impact degree based on the Joule heating cross-term model, combined with typical electricity consumption time differences; correcting this impact degree using the spatial drift penalty coefficient; and allocating topology weights according to betweenness centrality and dynamically corrected impedance, finally weighted aggregation to obtain the total line loss impact degree of the distribution network. This invention solves the problems of biased line loss assessment caused by existing assessments not considering electrothermal coupling impedance drift, time-asynchronous cross-heating, and unfused network topology, achieving accurate quantitative assessment of dynamic physical losses in distribution networks.

This invention provides a microcurrent rapid drying system and application method for metallic materials, belonging to the field of metallic material processing technology. It aims to solve the technical problems of low drying efficiency, easy oxidation, and uneven drying in traditional metallic materials drying processes. The system includes a chamber with a multi-layer material conveying mechanism. The conveying mechanism includes an insulated shaft drive assembly and a metal screen conveyor belt rotating in the opposite direction outside the chamber. The inner wall of the chamber is equipped with staggered insulating baffles to guide the material to tumble and fall. The system also includes an electrode module, which uses an external power supply and a constant-pressure spring-driven brush slidably connected to the metal screen conveyor belt to provide a microcurrent to the metallic material. An auxiliary module and a gas-liquid treatment module are connected to the outer side of the chamber for material feeding and discharging, drainage, and closed-loop circulation of inert gas. This invention utilizes electroosmosis and Joule heating to synergistically enhance drying, avoiding high-temperature oxidation and achieving rapid, non-destructive, and uniform drying at low or room temperature, significantly reducing drying energy consumption.

This invention discloses a device and method for preparing a solid electrolyte membrane based on Joule heating technology, belonging to the field of battery materials technology. The device includes a main body; a Joule heating element is disposed in the inner cavity of the main body; several slide rails are disposed on both sides of the Joule heating element, and the slide rails are fixedly connected to the inner wall of the main body; a temperature sensor that can slide vertically is disposed on the slide rail; the Joule heating element includes a heat-insulating sleeve, which is a hollow cylindrical structure with open ends; a detachable support is connected to the bottom of the heat-insulating sleeve; a semi-circular positive electrode interface and a negative electrode interface are respectively connected to both sides of the heat-insulating sleeve; pressure relief and temperature measurement holes are also provided on the side wall of the heat-insulating sleeve; an internal thread is provided on the upper inner wall of the heat-insulating sleeve for threaded connection with a pressure head; a ceramic preform is installed in the inner cavity of the heat-insulating sleeve; pads are disposed on both sides of the ceramic preform. This invention can achieve rapid densification and crystallization of the ceramic preform to obtain a high-performance solid electrolyte membrane.

This invention discloses a pixel array-based reconfigurable planar microwave device based on vanadium dioxide phase change thin film, belonging to the field of microwave device technology. The device includes a dielectric substrate, a metal ground plane, and a phase change patch array disposed on the dielectric substrate. The phase change patch array is composed of multiple vanadium dioxide thin film units. Each vanadium dioxide thin film unit has Cu thin film electrodes around its perimeter. The outer and inner electrodes are connected to pads via upper metal wiring, vias, and lower metal wiring, respectively, to form a localized current-carrying loop. The Joule heating generated by this localized current-carrying loop achieves selective phase change of the target vanadium dioxide thin film unit, forming different planar microwave conductive paths on the same device platform. This device features high structural integration, clear unit control, and good platform reusability.

This invention discloses a method for preparing polysaccharide-derived hard carbon anode materials using room-temperature molten salt-assisted Joule heating. Polysaccharide compounds are mixed with room-temperature molten salt, and the mixture is subjected to molten salt heat treatment to obtain a uniformly morphologically uniform ultrafine carbon precursor. This precursor is then subjected to high-temperature carbonization using Joule thermal shock technology. By precisely controlling the Joule thermal shock time, a hard carbon anode material with a composite structure of short-range ordered graphite microregions and a uniformly sized closed-pore network is obtained. The room-temperature molten salt plays a morphology-regulating role during heat treatment, ensuring uniform precursor particles and a smooth surface, providing an ideal reaction interface for subsequent Joule heat treatment. The Joule thermal shock treatment, through ultrafast heating and time threshold control, effectively preserves structural defects while allowing closed pores to grow to the optimal size. This invention achieves synergistic optimization of high plateau capacity and high ramp capacity through the synergistic effect of room-temperature molten salt morphology regulation and Joule thermal time threshold. The process is simple, energy-efficient, and suitable for large-scale production.

This invention discloses a 3D-printed liquid crystal elastomer (LCE) actuator and its electrothermal actuation method, belonging to the field of smart materials technology. Addressing the problems of complex alignment processes, difficulty in balancing printability and actuation performance, and limitations in three-dimensional structures inherent in traditional LCE processes, this invention utilizes material-structure co-design to directly induce liquid crystal alignment using the shear force of the 3D printing nozzle and achieves local alignment programming. By controlling the ratio of furan to phenylethylamine to construct a cross-linked network containing dynamic Diels-Alder bonds, high-temperature decrosslinking 3D printing and structural reconfigurability are achieved. Optimized printing parameters combined with conformal printing are used to fabricate a large-deformation three-dimensional LCE actuator. Electrothermal actuation is achieved using Joule heating with a serpentine resistance wire. The actuator prepared by this invention exhibits fast phase change response, large actuation deformation, and can be integrated into a single unit, making it suitable for flexible intelligent equipment and soft robots.

The utility model relates to the technical field of joule heat high temperature synthesis equipment discloses a rotatable joule heating device, include: the two sides inner wall of heating bin are connected with the clamping piece opposite rotation, and the pivot of one clamping piece is worn out heating bin, reaction pipe is arranged in the heating bin, and the both ends of reaction pipe are respectively clamped on two clamping pieces, and carbonaceous heating carrier is equipped in reaction pipe, and carbonaceous heating carrier is used for under the action of electric current instantaneous heat generation to heat the material in reaction pipe, the output shaft of rotary drive part is equipped with magnetic coupler, and magnetic coupler is connected with the pivot of clamping piece worn out heating bin, is used for driving reaction pipe to rotate through clamping piece, this device can overcome the defect that traditional heater heating rate is low, heating time is long and limit temperature is not high, can help high temperature synthesis material even in the heating test process is heated, and better control synthesis material's collective appearance, prevent the problem that synthesis material appearance is uneven.

This invention belongs to the field of electromagnetic absorbing materials technology. It relates to a layered high-entropy MBene material, its preparation method, and its applications. This invention utilizes high-temperature Joule heating to prepare the layered high-entropy MBene material. This layered high-entropy MBene material possesses many significant advantages, such as abundant defect density, good conductivity loss, high specific surface area, a large number of exposed surface atoms, and excellent mechanical and electronic properties. It can effectively control electromagnetic parameters and achieve excellent electromagnetic absorption performance. Furthermore, it exhibits nanoscale effects, which can induce lattice distortion, defects, and microstrain, significantly optimizing impedance matching and enhancing dipole polarization and conductivity loss, thus demonstrating outstanding microwave absorption performance. The high-temperature Joule heating synthesis strategy proposed in this invention provides a new approach for the development of advanced high-entropy electromagnetic absorbing materials and offers a general method for the development of other layered materials with tunable structures.

Methods and systems for the recovery and reuse of conductive additives for flash Joule heating. The conductive additives utilized or flash Joule heating for materials such as e-waste, ores, fly ash, soil, and / or bauxite residue can be recovered at high recovery yields greater than 85%, which can then be reused for further flash Joule heating processes. The conductive additives can be separated from the products of the flash Joule heating process, such as by sieving or by centrifugation, filtering, and drying.