Multi-field collaborative low-damage rapid powder homogenization system and method
By coupling the low-frequency ultrasonic field with the high-voltage electrostatic field, the mechanical contamination and damage problems in traditional powder mixing methods are solved, and the powder is mixed quickly and uniformly with low damage. This method is suitable for complex multi-component systems, especially rare earth composite materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JILIN UNIVERSITY
- Filing Date
- 2026-01-24
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional powder mixing methods suffer from problems such as mechanical contamination, damage, low mixing efficiency, difficulty in achieving uniform distribution at the nanoscale, and complex equipment, making them particularly unsuitable for high-value-added powders.
The system employs a coupled energy field of low-frequency ultrasonic field and high-voltage electrostatic field. The low-frequency ultrasonic field is generated by an ultrasonic resonance unit, and the high-voltage electrostatic field is generated by a high-voltage electrostatic field unit. This enables macroscopic convection and microscopic charging of powder, which are then precisely controlled by a control system.
It achieves low-damage, rapid, and uniform mixing of powders, avoids mechanical contamination, has a wide range of applications, is suitable for nanopowders and rare earth composites, and provides an ideal basis for sintering raw materials.
Smart Images
Figure CN122032384A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of metal powder processing technology, specifically relating to a multi-field synergistic powder low-damage rapid homogenization system and method. Background Technology
[0002] In the field of powder metallurgy, mixing uniformity is a key factor affecting the performance of the final product. Traditional powder mixing methods mainly rely on mechanical mixing paradigms, such as ball milling, high-speed stirring, and vibrating sieving. These methods achieve macroscopic dispersion and mixing of powders through mechanical forces (such as impact, shearing, and friction). For example, ball mills reduce particle size and promote mixing by the collision and rolling of grinding balls with powder; stirred mixers use the convection and shearing forces generated by the rotation of blades to achieve material dispersion and fusion; and vibratory mixing utilizes high-frequency vibration to cause powder flow and achieve mixing.
[0003] However, these traditional methods have inherent limitations: 1. During mechanical mixing, hard grinding media or stirring components come into direct contact with the powder, which can easily introduce metal or ceramic contamination, leading to a decrease in material purity; 2. Excessive mechanical force, especially for brittle powders or nanopowders, can cause particle breakage, surface damage, or lattice defects, affecting the original properties of the powder. 3. Traditional methods have limited ability to deagglomerate soft powder agglomerates (such as agglomerates formed due to van der Waals forces or electrostatic adsorption), making it difficult to achieve uniform distribution at the nanoscale. This is especially true for multi-component systems (such as composite materials containing rare earth phases), which can easily lead to component segregation. 4. Mechanical mixing has low efficiency, long mixing time, high energy consumption, and difficulty in maintaining stable mixing uniformity, making it difficult to meet the requirements for high-performance material preparation. 5. Traditional equipment has a complex structure, usually containing multiple moving parts, resulting in high maintenance costs and complicated operation; 6. Traditional equipment has a limited scope of application and is not effective in mixing high-value-added powders (such as rare earth materials and nanopowders), and cannot achieve directional enrichment or microstructure control. Summary of the Invention
[0004] The technical problem to be solved by this invention is to provide a multi-field synergistic powder low-damage rapid homogenization system and method to address the shortcomings of existing technologies. This invention achieves precise control of the powder mixing process by constructing a coupled energy field of low-frequency ultrasonic field and high-voltage electrostatic field.
[0005] This solution is achieved through the following technical measures: a multi-field synergistic powder low-damage rapid homogenization system, including... A mixing container used to hold powder samples; An ultrasonic resonance unit, installed at the bottom or side wall of the container, is used to generate a low-frequency ultrasonic field to drive macroscopic convection of powder. The high-voltage electrostatic field unit is used to generate a uniform high-voltage electrostatic field to charge the powder. The control system is used to adjust the ultrasonic parameters and the high-voltage electrostatic field parameters to achieve precise control of the coupled energy field. Temperature control unit is used to maintain a constant temperature during the mixing process.
[0006] Preferably, the multi-field synergistic powder low-damage rapid homogenization system further includes a vacuum or inert gas environment unit to prevent powder oxidation within the mixing container.
[0007] Preferably, the ultrasonic resonance unit includes a signal generator, a power amplifier, and a low-frequency ultrasonic transducer connected in series.
[0008] Preferably, the high-voltage electrostatic field unit includes a high-voltage DC power supply, a charge control system, and an electrode plate connected in series. The electrode plate is placed inside or outside the mixing container. The charge control system receives instructions from the control system and regulates the output of the high-voltage DC power supply. The charge control system also receives feedback signals from a charge sensor or current sensor arranged inside the mixing container to precisely regulate the charge state of the powder.
[0009] Preferably, the charge control system includes a parameter setting module and a feedback monitoring module; The parameter setting module is used to set and output the initial operating parameters of the high-voltage electrostatic field, including the DC voltage amplitude and polarity. The feedback monitoring module indirectly assesses the overall charge status of the powder by monitoring the average current or space charge distribution within the mixing container.
[0010] Preferably, the charge control system includes the following operating modes: Strong depolymerization mode: When the homogenization system aims to depolymerize hard or soft agglomerates, the charge control system outputs a static voltage of 3-5kV. Directed enrichment mode: When a homogenization system needs to promote the migration of specific components to the interface, the charge control system adjusts the voltage polarity or applies an asymmetric electric field within a specific time period. Dynamic synergistic mode: Synchronous modulation is performed based on the operating frequency or power of the low-frequency ultrasonic transducer, so that the intensity or polarity of the high-voltage electrostatic field changes periodically with the low-frequency ultrasonic field, forming a resonant synergistic effect.
[0011] Preferably, the control system includes a microprocessor, sensors, and a user interface, wherein the sensors and the user interface are electrically connected to the microprocessor.
[0012] Preferably, the output voltage range of the high-voltage DC power supply is 0.5-10 kV, and its output polarity is adjustable; the ultrasonic frequency of the low-frequency ultrasonic transducer is 40-60 kHz, and the voltage range of the high-voltage electrostatic field is 1-5 kV.
[0013] This invention also provides a multi-field synergistic powder low-damage rapid homogenization method based on the above-mentioned multi-field synergistic powder low-damage rapid homogenization system, comprising the following steps: S1: Powder preparation: Add the powder to be mixed to the mixing container in the specified proportion; S2: System Initialization: Start the control system and set initial parameters; S3: Synchronous activation of the coupling energy field: Simultaneously activates the ultrasonic resonance unit and the high-voltage electrostatic field unit, wherein: By applying a low-frequency ultrasonic field through an ultrasonic resonance unit, the low-frequency ultrasonic field forms a standing wave or traveling wave in the mixing container, driving the powder particles to generate macroscopic convection and diffusion, thereby achieving rapid distribution and mixing. A high-voltage electrostatic field is applied by a high-voltage electrostatic field unit to charge the powder particles. The charged particles generate Coulomb repulsion to deagglomerate soft agglomerates and promote the directional migration of charged particles at the interface. S4: Mixing process monitoring and control: The mixing uniformity and temperature parameters are monitored in real time by sensors and fed back to the control system. The control system dynamically adjusts the parameters of the low-frequency ultrasonic field and / or the parameters of the high-voltage electrostatic field according to the feedback information to maintain the stability and optimization of the mixing process. S5: Mixing complete: After mixing for 5-30 minutes, when the predetermined uniformity is reached, stop the ultrasonic resonance unit and the high-voltage electrostatic field unit, and remove the mixed powder.
[0014] Preferably, the particle size of the powder in step S1 ranges from nanometers to micrometers, and the powder to be mixed in step S1 is a metal powder, ceramic powder, or a composite powder containing rare earth phase.
[0015] The beneficial effects of this invention are: 1. The multi-field synergistic powder low-damage rapid homogenization system of the present invention abandons the traditional mechanical mixing paradigm and adopts the coupling and resonance of high voltage electrostatic field and low frequency ultrasonic field to achieve precise, efficient and uniform mixing of powder (especially micro / nano powder and difficult-to-mix materials) from macro to micro, thereby eliminating mechanical contamination and achieving micro-damage and ultra-uniform mixing of powder system. 2. The multi-field synergistic powder low-damage rapid homogenization system of the present invention has a simple structure, few system components, convenient maintenance, and easy automation of operation; 3. This invention has a wide range of applications and can be applied to various powder materials, including nanopowders and rare earth composite materials. It can also achieve directional enrichment, providing an ideal raw material basis for subsequent sintering.
[0016] Therefore, it can be seen that the present invention has outstanding substantive features and significant progress compared with the prior art. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the multi-field synergistic powder low-damage rapid homogenization system in this invention.
[0018] Figure 2 (a) Schematic diagram of the microstructure of the mixed powder after homogenization treatment in Example 1 of the present invention.
[0019] Figure 2 (b) Schematic diagram of the microstructure of the mixed powder in Comparative Example 1 of the present invention.
[0020] Figure 2 (c) Schematic diagram of the microstructure of the sintered mixed powder after homogenization treatment in Example 1 of the present invention.
[0021] Figure 2 (d) Schematic diagram of the microstructure of the mixed powder in the sintered state in Comparative Example 1 of the present invention.
[0022] In the diagram: 1-Control system, 2-Mixing container, 3-High voltage electrostatic field unit, 4-Ultrasonic resonance unit, 5-Temperature control unit, 6-Vacuum or inert gas environment unit. Detailed Implementation
[0023] To clearly illustrate the technical features of this solution, the following detailed implementation method, in conjunction with its accompanying drawings, will be used to describe the solution.
[0024] Multi-field synergistic powder low-damage rapid homogenization system, including Mixing container 2, used to hold powder samples; Ultrasonic resonance unit 4, installed at the bottom or side wall of the container, is used to generate a low-frequency ultrasonic field to drive macroscopic convection of powder; High voltage electrostatic field unit 3 is used to generate a uniform high voltage electrostatic field to charge the powder. The voltage range of the high voltage electrostatic field is 1-5 kV. Control system 1 is used to adjust ultrasonic parameters and high-voltage electrostatic field parameters to achieve precise control of the coupled energy field; Temperature control unit 5 is used to maintain a constant temperature during the mixing process; A vacuum or inert gas environment unit 6 is used to prevent the powder in the mixing container 2 from oxidizing.
[0025] The ultrasonic resonance unit 4 includes a signal generator, a power amplifier, and a low-frequency ultrasonic transducer connected in series, wherein the ultrasonic frequency of the low-frequency ultrasonic transducer is 40-60 kHz.
[0026] The high-voltage electrostatic field unit 3 includes a high-voltage DC power supply, a charge control system, and an electrode plate connected in series. The electrode plate is placed inside or outside the mixing container 2. The output voltage range of the high-voltage DC power supply is 0.5-10 kV, and its output polarity is adjustable. The polarity of the high-voltage electrostatic field can be selected according to the work function of the powder material. For example, for metal powders that easily lose electrons, such as titanium alloys and aluminum alloys, the electrostatic field polarity is usually set to negative to promote the powder particles to lose electrons and become positively charged; for some ceramic or polymer powders, it can be set to positive polarity. The optimal polarity can be determined through simple preliminary experiments. For example, under the same voltage, the polarity that produces stronger Coulomb repulsion and better dispersion is the suitable polarity.
[0027] The charge control system receives instructions from the control system 1 and regulates the output of the high-voltage DC power supply. The charge control system also receives feedback signals from the charge sensor or current sensor arranged in the mixing container 2 to precisely regulate the charge state of the powder.
[0028] The charge control system includes a parameter setting module and a feedback monitoring module; The parameter setting module is used to set and output the initial operating parameters of the high-voltage electrostatic field, including the DC voltage amplitude and polarity. The feedback monitoring module indirectly assesses the overall charge status of the powder by monitoring the average current or space charge distribution within the mixing container 2.
[0029] The charge control system includes the following operating modes: Strong depolymerization mode: When the homogenization system aims to depolymerize hard or soft agglomerates, the charge control system outputs a static voltage of 3-5kV. Directed enrichment mode: When a homogenization system needs to promote the migration of specific components to the interface, the charge control system adjusts the voltage polarity or applies an asymmetric electric field within a specific time period. Dynamic synergistic mode: Synchronous modulation is performed based on the operating frequency or power of the low-frequency ultrasonic transducer, so that the intensity or polarity of the high-voltage electrostatic field changes periodically with the low-frequency ultrasonic field, forming a resonant synergistic effect.
[0030] The control system 1 includes a microprocessor, sensors, and a user interface, wherein the sensors and the user interface are electrically connected to the microprocessor.
[0031] The ultrasonic resonance unit 4 in this invention can generate a low-frequency ultrasonic field. The low-frequency ultrasonic field generates strong fluid dynamics through cavitation effect and acoustic flow effect, driving the macroscopic movement of powder and realizing rapid convection mixing. The resonance frequency can enhance energy transfer and reduce energy loss.
[0032] The high-voltage electrostatic field unit 3 in this invention can generate a uniform high-voltage electrostatic field. This field charges the powder particles, and the Coulomb forces between the particles overcome the van der Waals forces, leading to deagglomeration and soft agglomeration. Simultaneously, the electrostatic field gradient drives the directional movement of charged particles, achieving a uniform microscopic distribution. Especially for multi-component systems, this promotes the selective enrichment of rare earth phases at the interface.
[0033] In this invention, the synergistic effect of ultrasonic and electrostatic fields generates a coupling effect, achieving a unified macroscopic and microscopic hybridization. The ultrasonic field is responsible for the overall flow, while the electrostatic field is responsible for local deagglomeration and directional alignment, thereby achieving uniform distribution at the nanoscale and avoiding mechanical damage.
[0034] This invention also provides a multi-field synergistic powder low-damage rapid homogenization method based on the above-mentioned multi-field synergistic powder low-damage rapid homogenization system, comprising the following steps: S1: Powder preparation: Add the powder to be mixed into mixing container 2 in proportion. The powder to be mixed is metal powder, ceramic powder or composite powder containing rare earth phase. The particle size of the powder can be selected from nanometer to micrometer. S2: System initialization: Start control system 1 and set initial parameters. The initial parameters are: the voltage range of the high-voltage electrostatic field is 1-5 kV. This voltage range can ensure the effective charging of each component in the titanium-based composite powder system and avoid dielectric breakdown or corona discharge, ensuring the stability and repeatability of the directional assembly process; the ultrasonic frequency of the low-frequency ultrasonic transducer is 40-60 kHz; and the output voltage range of the high-voltage DC power supply is 0.5-10 kV. S3: Synchronous activation of the coupling energy field: Simultaneously activates the ultrasonic resonance unit and the high-voltage electrostatic field unit, wherein: By applying a low-frequency ultrasonic field through the ultrasonic resonance unit 4, the low-frequency ultrasonic field forms a standing wave or traveling wave in the mixing container 2, driving the powder particles to generate macroscopic convection and diffusion, thereby achieving rapid distribution and mixing. A high-voltage electrostatic field is applied by the high-voltage electrostatic field unit 3 to charge the powder particles. The charged particles generate Coulomb repulsion to deagglomerate soft agglomerates and promote the directional migration of charged particles at the interface. S4: Mixing process monitoring and control: The mixing uniformity and temperature parameters are monitored in real time by sensors and fed back to the control system 1. The control system 1 dynamically adjusts the parameters of the low-frequency ultrasonic field and / or the parameters of the high-voltage electrostatic field according to the feedback information to maintain the stability and optimization of the mixing process. S5: Mixing complete: After mixing for 5-30 minutes, when the predetermined uniformity is reached, stop the ultrasonic resonance unit 4 and the high voltage electrostatic field unit 3, and take out the mixed powder. Example
[0035] A mixture of large-particle spherical titanium powder, titanium hydride powder, and trace amounts of rare-earth lanthanum hexaboride powder (a system with high density difference / morphological differences / ultra-complex multi-component system): S1: The components of the powder to be mixed are as follows Matrix: Pure titanium powder, average particle size 100 μm, spherical; Pore-forming agent: Titanium hydride powder (TiH2), with an average particle size of 10 μm and irregular polygonal shape.
[0036] Additive: Lanthanum hexaboride (LaB6) powder, with an average particle size of 1 μm, in irregular lumps.
[0037] The mass ratio of each component is as follows: pure titanium powder accounts for 69.2%, titanium hydride powder accounts for 30%, and lanthanum hexaboride accounts for 0.8%. Pure titanium powder, titanium hydride powder, and lanthanum hexaboride powder are added to mixing container 2 according to the above mass ratio; S2: Start control system 1 and set initial parameters. The initial parameters are: The low-frequency ultrasonic transducer has an ultrasonic frequency of 28 kHz. The low-frequency ultrasonic transducer provides enough energy to first depolymerize the soft agglomerates of lanthanum hexaboride and disperse lanthanum hexaboride into the entire mixing space. The high-voltage electrostatic field, at 5 kV with positive polarity, aims to fully charge the three powders: pure titanium powder, titanium hydride powder, and lanthanum hexaboride powder. The key lies in achieving directional assembly by controlling the electrostatic field strength and utilizing the difference in charge-to-mass ratio among the different powder particles. Positively charged lanthanum hexaboride nanoclusters and titanium hydride powder particles are more strongly attracted and fixed at specific positions on the surface of negatively charged (or weakly positively charged due to electron loss) spherical titanium powder, achieving precise microscale mixing.
[0038] S3: Simultaneously activate the ultrasonic resonance unit 4 and the high-voltage electrostatic field unit 3. Apply a low-frequency ultrasonic field through the ultrasonic resonance unit 4 to form a standing wave in the mixing container. This generates a strong acoustic flow effect in the antinode region, driving macroscopic convection and diffusion of powder particles to achieve rapid distribution mixing. Apply a high-voltage electrostatic field through the high-voltage electrostatic field unit 3 to charge the powder particles. This generates Coulomb repulsion between charged particles to deagglomerate soft agglomerates and promotes the directional migration of charged particles at the interface. S4: The uniformity of powder mixing and temperature parameters in the mixing container 2 are monitored in real time by the sensor and fed back to the control system 1. The control system 1 dynamically adjusts the parameters of the low-frequency ultrasonic field and / or the parameters of the high-voltage electrostatic field according to the feedback information to maintain the stability and optimization of the mixing process. S5: After mixing for 5 minutes under argon protection to achieve the desired homogeneity, stop the energy field and remove the powder.
[0039] In this embodiment, the density and size segregation of each component are as follows: pure titanium powder (~4.3 g / cm³, 100 μm), titanium hydride powder (~3.9 g / cm³, 10 μm), and lanthanum hexaboride powder (~4.7 g / cm³, 1 μm) exhibit multiple differences in density and size. A very small amount (0.3 wt.%) of submicron-sized lanthanum hexaboride powder possesses extremely high surface energy and is highly prone to agglomeration. Traditional methods are almost ineffective in detaching it from the agglomerates and distributing it uniformly across the surface of the large spherical titanium powder. Uniform distribution of lanthanum hexaboride powder at the nanometer / micrometer scale is essential to effectively pin grain boundaries and exert its grain-refining effect.
[0040] After the powder is mixed in this embodiment: Macroscopic and microscopic uniformity of the powder: The overall color of the powder pile is uniform. SEM / BSE images show that titanium hydride powder and finer, brighter lanthanum hexaboride particles (which are brighter under BSE due to their high atomic number caused by lanthanum) are commonly and uniformly distributed on the surface of the spherical titanium powder.
[0041] Nanoscale distribution: High-magnification SEM and EDS surface scanning analysis showed that the signal points of lanthanum (representing lanthanum hexaboride) were uniformly distributed in the matrix, and no lanthanum hexaboride agglomerates larger than 2 μm were found, which proved the efficient deagglomeration effect of electrostatic Coulomb repulsion on nanoagglomerates.
[0042] Microstructure after sintering: The sintered body has a uniform pore distribution (thanks to the uniform distribution of titanium hydride). More importantly, metallographic observation shows that the grain size of titanium is significantly refined and uniform.
[0043] In this embodiment, the mixed powder can be used to prepare next-generation high-performance multi-scale heterostructure titanium alloys. Large spherical titanium powder particles form the framework, titanium hydride powder acts as a pore-forming agent, and trace amounts of lanthanum hexaboride powder act as a deoxidizer, grain refiner, and strengthening phase. This aims to control the oxygen content of the matrix while achieving a synergistic effect of uniform pore structure and matrix strengthening.
[0044] Comparative Example 1: The powder to be mixed in Comparative Example 1 was the same as that in Example 1, and was mixed using a three-dimensional mixer and a planetary ball mill.
[0045] A two-step mixing method was employed. First, lanthanum hexaboride powder and a small amount of titanium hydride powder were premixed in a three-dimensional mixer for 1 hour. Then, this premix was mixed with spherical titanium powder in a planetary ball mill for 60 minutes (240 rpm / min). This is a commonly used industrial method for processing trace additives, aiming to improve dispersibility through premixing.
[0046] After the powder is mixed: Microscopic analysis: Obvious lanthanum hexaboride agglomerates with sizes ranging from 10 to 50 μm were observed under SEM. These agglomerates became the source of structural defects after sintering.
[0047] Microstructure after sintering: The sintered body has an uneven pore structure and microcracks exist around the lanthanum hexaboride agglomerates.
[0048] The present invention has the following advantages: 1. Eliminates mechanical contamination: Since there are no mechanical contact parts, the introduction of foreign impurities is avoided, thus improving the purity of the material; 2. Low-damage mixing is possible: Ultrasonic and electrostatic fields are non-contact energy fields with gentle forces, avoiding particle breakage and surface damage, and maintaining the original properties of the powder; 3. Enables ultra-uniform mixing: The coupled energy field effectively deagglomerates soft clusters, achieving uniform distribution at the nanoscale, especially for multi-component systems, avoiding component segregation; 4. Enables efficient mixing: mixing time is reduced to minutes, energy consumption is reduced, and uniformity is controllable; 5. Simple structure: The system has few components, is easy to maintain, and is easy to automate. 6. Wide range of applications: It is suitable for various powder materials, including nanopowders, rare earth composite materials, etc., and can achieve directional enrichment, providing an ideal raw material basis for subsequent sintering.
[0049] In summary, this invention achieves macroscopic convection and initial deagglomeration through a low-frequency ultrasonic field, combined with charge-driven microscopic directional assembly and Coulomb force deagglomeration achieved through a high-voltage electrostatic field. This successfully solves three core challenges in complex multi-component powder systems, particularly those containing trace amounts of highly active components: density segregation, size segregation, and nano-agglomeration. This not only achieves physical homogeneity but also enables precise distribution of functional additives at the chemical microscale, providing a revolutionary raw material preparation solution for developing next-generation structure-function integrated porous metallic materials.
[0050] Technical features not described in this invention can be implemented using existing technologies and will not be elaborated upon here. This invention is not limited to the specific embodiments described above; any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this invention should also fall within the protection scope of this invention.
Claims
1. A multi-field synergistic powder low-damage rapid homogenization system, characterized by: include A mixing container used to hold powder samples; An ultrasonic resonance unit, installed at the bottom or side wall of the container, is used to generate a low-frequency ultrasonic field to drive macroscopic convection of powder. The high-voltage electrostatic field unit is used to generate a uniform high-voltage electrostatic field to charge the powder. The control system is used to adjust the ultrasonic parameters and the high-voltage electrostatic field parameters to achieve precise control of the coupled energy field. Temperature control unit is used to maintain a constant temperature during the mixing process.
2. The multi-field synergistic powder low-damage rapid homogenization system according to claim 1, characterized in that, Also includes A vacuum or inert gas environment unit is used to prevent the powder in the mixing container from oxidizing.
3. The multi-field synergistic powder low-damage rapid homogenization system according to claim 1 or 2, characterized in that, The ultrasonic resonance unit includes a signal generator, a power amplifier, and a low-frequency ultrasonic transducer connected in series.
4. The multi-field synergistic powder low-damage rapid homogenization system according to claim 3, characterized in that, The high-voltage electrostatic field unit includes a high-voltage DC power supply, a charge control system, and an electrode plate connected in series. The electrode plate is placed inside or outside the mixing container. The charge control system receives instructions from the control system and regulates the output of the high-voltage DC power supply. The charge control system also receives feedback signals from a charge sensor or current sensor arranged inside the mixing container to precisely regulate the charge state of the powder.
5. The multi-field synergistic powder low-damage rapid homogenization system according to claim 4, characterized in that, The charge control system includes a parameter setting module and a feedback monitoring module; The parameter setting module is used to set and output the initial operating parameters of the high-voltage electrostatic field, including the DC voltage amplitude and polarity. The feedback monitoring module indirectly assesses the overall charge status of the powder by monitoring the average current or space charge distribution within the mixing container.
6. The multi-field synergistic powder low-damage rapid homogenization system according to claim 5, characterized in that, The charge control system includes the following operating modes: Strong depolymerization mode: When the homogenization system aims to depolymerize hard or soft agglomerates, the charge control system outputs a static voltage of 3-5kV. Directed enrichment mode: When a homogenization system needs to promote the migration of specific components to the interface, the charge control system adjusts the voltage polarity or applies an asymmetric electric field within a specific time period. Dynamic synergistic mode: Synchronous modulation is performed based on the operating frequency or power of the low-frequency ultrasonic transducer, so that the intensity or polarity of the high-voltage electrostatic field changes periodically with the low-frequency ultrasonic field, forming a resonant synergistic effect.
7. The multi-field synergistic powder low-damage rapid homogenization system according to claim 6, characterized in that, The control system includes a microprocessor, sensors, and a user interface, wherein the sensors and the user interface are electrically connected to the microprocessor.
8. The multi-field synergistic powder low-damage rapid homogenization system according to claim 7, characterized in that, The output voltage range of the high-voltage DC power supply is 0.5-10 kV, and its output polarity is adjustable; the ultrasonic frequency of the low-frequency ultrasonic transducer is 40-60 kHz, and the voltage range of the high-voltage electrostatic field is 1-5 kV.
9. A method for rapid homogenization of powder with low damage based on the multi-field synergistic powder low-damage rapid homogenization system according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Powder preparation: Add the powder to be mixed to the mixing container in the specified proportion; S2: System Initialization: Start the control system and set initial parameters; S3: Synchronous activation of the coupling energy field: Simultaneously activates the ultrasonic resonance unit and the high-voltage electrostatic field unit, wherein: By applying a low-frequency ultrasonic field through an ultrasonic resonance unit, the low-frequency ultrasonic field forms a standing wave or traveling wave in the mixing container, driving the powder particles to generate macroscopic convection and diffusion, thereby achieving rapid distribution and mixing. A high-voltage electrostatic field is applied by a high-voltage electrostatic field unit to charge the powder particles. The charged particles generate Coulomb repulsion to deagglomerate soft agglomerates and promote the directional migration of charged particles at the interface. S4: Mixing process monitoring and control: The mixing uniformity and temperature parameters are monitored in real time by sensors and fed back to the control system. The control system dynamically adjusts the parameters of the low-frequency ultrasonic field and / or the parameters of the high-voltage electrostatic field according to the feedback information to maintain the stability and optimization of the mixing process. S5: Mixing complete: After mixing for 5-30 minutes, when the predetermined uniformity is reached, stop the ultrasonic resonance unit and the high-voltage electrostatic field unit, and remove the mixed powder.
10. The multi-field synergistic powder low-damage rapid homogenization method according to claim 9, characterized in that, The particle size of the powder in step S1 ranges from nanometers to micrometers, and the powder to be mixed in step S1 is a metal powder, ceramic powder, or a composite powder containing rare earth phase.