Method for producing angstrom powder elementary substance iridium based on plasma

Abstract

The invention discloses a method for producing angstrom powder elementary substance iridium based on plasma, and relates to the technical field of metal powder preparation, the method comprises the following steps: 1, discharging gas in a production tank, and filling inert gas; 2, cooling water is introduced into the water cooling assembly; thirdly, a refrigeration structure is started to work, fan blades and a lateral gas guide structure are driven to rotate, and gas in the production tank flows; 4, the mounting assembly is started to drive the iridium rod to rotate, the iridium rod and the electrode tip are powered on, after electric arcs are generated between the iridium rod and the electrode tip, the iridium rod is melted at high temperature to form molten drops, the molten drops are converted into superfine liquid drops during high-speed rotation of the iridium rod, the superfine liquid drops are splashed around, and at the moment, fan blades generate airflow in an air gathering pipe; the air flow cools the electrode tip when passing through the electrode tip; the superfine liquid drops are driven by airflow to flow in the flowing direction of the airflow, the superfine liquid drops are cooled, and the superfine liquid drops are conveniently promoted to be solidified into powder.

Description

Technical Field

[0001] This invention relates to the field of metal powder preparation technology, and in particular to a method for producing angstrom-sized elemental iridium powder based on plasma. Background Technology

[0002] In the plasma preparation of elemental iridium powder, an iridium rod is used as an electrode. The iridium rod is consumed and rotated at high speed. The end of the iridium rod is melted by a plasma arc. The molten droplets are then ejected under centrifugal conditions to form ultrafine droplets. These ultrafine droplets are cooled and solidified in an inert gas to form elemental iridium powder, thus obtaining the powder.

[0003] In existing methods for preparing elemental iridium powder, the high-speed rotation of an iridium rod is used to eject molten droplets, forming ultrafine droplets. However, the inert gas within the apparatus hinders the movement of these droplets. This gas resistance causes the cooled droplets to mix together, leading not only to an increased particle size in the produced powder but also to uneven powder size after solidification. Furthermore, these methods require cooling the inert gas within the apparatus. During prolonged production, the high-temperature inert gas at the top of the apparatus can cause overheating, slowing down the cooling rate of the ultrafine droplets.

[0004] Therefore, existing methods for preparing elemental iridium powder suffer from problems such as the mixing of cooled droplets due to the inert gas in the apparatus hindering the movement of ultrafine droplets, and a slower cooling rate of the ultrafine droplets due to the higher temperature at the top of the apparatus. To address these issues, we propose a plasma-based method for producing angstrom-sized elemental iridium powder. Summary of the Invention

[0005] The purpose of this invention is to provide a method for producing angstrom-sized elemental iridium powder based on plasma, which can effectively solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a method for producing angstrom-sized elemental iridium powder based on plasma. The method uses an elemental iridium powder preparation device, which includes a production tank, an installation assembly disposed above the inside of the production tank for mounting an iridium rod, an electrode head disposed in the middle of the inside of the production tank, a water-cooling assembly disposed in the lower middle of the inner wall of the production tank, and a cooling assembly disposed in the lower middle of the inside of the production tank. The electrode head is located directly below the iridium rod. The upper end of the electrode head consists of two frustum-shaped structures, which are used to evenly distribute the upward airflow from the bottom to the surrounding area. The cooling assembly includes a filter structure fixedly installed inside the lower part of the production tank, a refrigeration structure installed directly above the filter structure, a lateral air guiding structure movably installed above the refrigeration structure, an air gathering pipe installed directly above the lateral air guiding structure, and fan blades fixedly installed inside the air gathering pipe. Specifically, the following steps are included: Step 1: Purge the gas from the production tank and fill it with inert gas; Step 2: Pour cooling water into the water-cooling components; Step 3: Start the refrigeration structure to operate, driving the fan blades and lateral air guide structure to rotate, causing the gas inside the production tank to flow; Step 4: Start the installation assembly to rotate the iridium rod and energize the iridium rod and electrode head. An electric arc is generated between the iridium rod and the electrode head, and the iridium rod melts at high temperature to form molten droplets. As the iridium rod rotates at high speed, the molten droplets are ablated into ultrafine droplets and splashed around. At this time, the fan blades generate airflow in the gas collection tube. When the airflow passes the electrode head, it cools the electrode head. After passing the frustum-shaped section below the electrode head, the airflow flows obliquely upward, blowing the ultrafine droplets obliquely upward and accelerating the cooling of the ultrafine droplets into powder. The powder falls after reaching the highest point and is blown towards the water-cooling component when it falls to the side air guide structure. The powder and the gas here are cooled by the airflow of the side air guide structure and the water-cooling component. The powder is filtered by the filter structure, and the gas enters the filter structure and flows into the cooling structure to be cooled before flowing to the side air guide structure and the fan blades respectively.

[0007] Preferably, the water-cooling assembly includes a water-cooling tank fixedly disposed in the lower part of the inner wall of the production tank, and a heat-conducting pipe fixedly disposed inside the water-cooling tank. The water-cooling tank has an inlet at the lower side and an outlet at the upper side, both of which penetrate the side wall of the production tank. The heat-conducting pipe has a frustum-shaped structure, with the upper opening larger than the lower opening. The powder falls along the inner wall of the heat-conducting pipe to cool down.

[0008] Preferably, a mounting base is fixedly installed at the lower interior of the production tank, a positioning base is fixedly installed at the bottom of the production tank, and a positioning tube is fixedly installed above the mounting base. The cooling assembly also includes a rotating shaft, a drive motor, a planetary gear set, and a connecting ring. The lower end of the rotating shaft penetrates the bottom wall of the production tank and is movably disposed inside the mounting base and the positioning base. The drive motor is fixedly installed at the bottom of the positioning base, and the upper end of the rotating shaft is movably disposed inside the positioning tube. The sun gear of the planetary gear set is fixedly disposed on the outer side of the rotating shaft, and the outer ring of the planetary gear set is fixedly disposed on the inner side of the connecting ring. The lateral air guide structure is fixedly disposed directly above the connecting ring, and the fan blades are fixedly disposed on the outer side of the rotating shaft, with the fan blades located directly above the planetary gear set. The drive motor drives the rotating shaft to rotate, thereby driving the fan blades and the planetary gear set. The planetary gear set drives the lateral air guide structure to rotate through the connecting ring, promoting the flow of gas inside the production tank.

[0009] Preferably, the lateral air guiding structure includes a rotating platform and a flow divider. The rotating platform has several arc-shaped exhaust slots inside. During the rotation of the rotating platform, the internal gas is discharged to the outside through the exhaust slots. Each exhaust slot is provided with multiple flow dividers. The flow dividers guide the airflow inside the rotating platform to be discharged to the outside. The rotating platform is fixedly installed directly above the connecting ring.

[0010] Preferably, a retaining tube is fixedly installed on the upper side of the positioning tube via a connecting plate, a support plate is fixedly installed above the retaining tube, the rotating platform is movably positioned directly above the support plate, the filter structure is fixedly positioned below the retaining tube, and the refrigeration structure is fixedly positioned inside the retaining tube.

[0011] Preferably, the filter structure includes a filter layer and a support layer. The support layer is fixedly disposed between the fixing tube and the mounting base. The filter layer is sleeved on the outside of the support layer. The support layer supports and positions the filter layer. The support layer has a plurality of evenly spaced air vents inside. Both the filter layer and the support layer are frustum-shaped structures and are inverted.

[0012] Preferably, the refrigeration structure includes a priming tank and an evaporator fixedly installed inside the priming tank. The evaporator is connected to an external heat exchange device of the production tank to cool the airflow passing through the priming tank.

[0013] Preferably, the gas-gathering pipe includes an upper pipe, a connecting pipe, and a lower pipe. The diameter of the upper pipe is smaller than the diameter of the lower pipe but larger than the maximum diameter of the electrode head. The connecting pipe has a frustum-shaped structure and is fixedly connected to both the upper and lower pipes. The lower pipe is fixedly connected to the production tank via a connecting rod. The fan blade is located in the middle of the inner side of the lower pipe.

[0014] Preferably, a powder discharge assembly is fixedly installed on one side of the bottom of the production tank.

[0015] Preferably, the outside of the stationary tube is provided with a heat insulation layer.

[0016] The present invention has the following beneficial effects: 1. This invention utilizes airflow to drive the flow of ultrafine droplets, cooling them and facilitating their solidification into powder. Furthermore, because the ultrafine droplets flow in the direction of the airflow, the gas inside the production tank does not impede their movement, effectively preventing the droplets from mixing together and resulting in smaller powder particles. Additionally, the airflow cooling the electrode head extends its lifespan.

[0017] 2. In this invention, the gas inside the production tank flows upward through the gas-gathering pipe and mixes with the gas above the inside of the production tank. This cools the gas above the inside of the production tank, preventing the formation of a high-temperature zone above the inside of the production tank due to the presence of hot gas. This also avoids overheating above the inside of the production tank, which would slow down the cooling rate of the ultrafine droplets.

[0018] 3. In this invention, a cold air mass blows the powder and the hot gas flowing downwards near the inner wall of the production tank towards the water-cooling component for cooling. Both the powder and the hot gas achieve a dual cooling effect. After cooling, the gas enters the refrigeration structure for further cooling and then flows to the lateral air guide structure to be discharged again. This allows for rapid circulation and cooling of the gas outside the lateral air guide structure, which also accelerates the rate at which the gas passes through the refrigeration structure, further improving the cooling capacity of the refrigeration structure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart of a method for producing angstrom-sized elemental iridium powder based on plasma according to the present invention; Figure 2 A perspective view of the equipment for preparing elemental iridium powder used in the method of this invention; Figure 3 This is a three-dimensional cross-sectional view of the equipment for preparing elemental iridium powder used in the method of the present invention. Figure 4 The equipment for preparing elemental iridium powder used in the method of this invention Figure 3Enlarged view of section A in the middle; Figure 5 This is a three-dimensional cross-sectional view of the cooling component of the elemental iridium powder preparation equipment used in the method of the present invention; Figure 6 This is a perspective view of a portion of the lateral gas guiding structure of the elemental iridium powder preparation equipment used in the method of this invention. Figure 7 This is a perspective view of the lateral gas guiding structure of the elemental iridium powder preparation equipment used in the method of the present invention. Figure 8 This is a perspective view of the cooling structure of the iridium powder preparation equipment used in the method of the present invention. Figure 9 This is a perspective view of the water-cooled tank of the elemental iridium powder preparation equipment used in the method of the present invention; Figure 10 This is a perspective view of the filter structure of the elemental iridium powder preparation equipment used in the method of this invention.

[0021] The attached diagram lists the components represented by each number as follows: 1. Production tank; 2. Mounting assembly; 3. Electrode head; 4. Water cooling assembly; 41. Water cooling tank; 42. Heat pipe; 5. Cooling assembly; 51. Filter structure; 511. Filter layer; 512. Support layer; 52. Refrigeration structure; 521. Air intake tank; 522. Evaporator; 53. Lateral air guide structure; 531. Rotating table; 532. Flow divider; 54. Gas gathering pipe; 541. Upper pipe; 542. Connecting pipe; 543. Lower pipe; 55. Fan blade; 56. Rotating shaft; 57. Drive motor; 58. Planetary gear set; 59. Connecting ring; 6. Mounting base; 7. Positioning base; 8. Positioning pipe; 9. Exhaust groove; 10. Connecting plate; 11. Fixing pipe; 12. Support plate; 13. Discharge assembly; 14. Insulation layer. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example:

[0023] Please see Figure 1-10As shown, a method for producing angstrom-sized elemental iridium powder based on plasma is used for production using an elemental iridium powder preparation device. The elemental iridium powder preparation device includes a production tank 1, an installation assembly 2 disposed inside the upper part of the production tank 1 for mounting an iridium rod, an electrode head 3 disposed in the middle of the inside of the production tank 1, a water cooling assembly 4 disposed in the lower part of the inner wall of the production tank 1, and a cooling assembly 5 disposed in the lower part of the inside of the production tank 1. Electrode head 3 is located directly below the iridium rod. The upper end of electrode head 3 consists of two frustum-shaped structures, which are used to evenly distribute the upward airflow from the bottom to the surrounding area. The cooling assembly 5 includes a filter structure 51 fixedly disposed inside the lower part of the production tank 1, a refrigeration structure 52 disposed directly above the filter structure 51, a lateral air guide structure 53 movably disposed above the refrigeration structure 52, an air gathering pipe 54 disposed directly above the lateral air guide structure 53, and a fan blade 55 fixedly disposed inside the air gathering pipe 54. Specifically, the following steps are included: Step 1: Purge the gas from production tank 1 and fill it with inert gas; Step 2: Pour cooling water into the water-cooled assembly 4; Step 3: Start the refrigeration structure 52 to drive the fan blades 55 and the lateral air guide structure 53 to rotate, so that the gas inside the production tank 1 flows. Step 4: Start the installation component 2 to drive the iridium rod to rotate and energize the iridium rod and electrode head 3. After an electric arc is generated between the iridium rod and electrode head 3, the iridium rod melts at high temperature to form molten droplets. During the high-speed rotation of the iridium rod, the molten droplets are ablated into ultrafine droplets and splashed around. At this time, the fan blade 55 generates airflow in the gas collection tube 54. When the airflow passes the electrode head 3, it cools the electrode head 3. After the airflow passes the frustum-shaped part below the electrode head 3, it flows obliquely upward, blowing the ultrafine droplets obliquely upward and accelerating the cooling of the ultrafine droplets into powder. After the powder reaches the highest point, it falls and is blown towards the water cooling component 4 when it falls to the side air guide structure 53. The powder and the gas here are cooled by the airflow of the side air guide structure 53 and the water cooling component 4. The filter structure 51 filters the powder, and the gas enters the filter structure 51 and flows into the cooling structure 52. After being cooled, it flows to the side air guide structure 53 and the fan blade 55 respectively.

[0024] During the production of iridium powder, the rotation of the fan blade 55 and the lateral air guide structure 53 causes the gas inside the production tank 1 to flow upward through the gas gathering pipe 54 from the middle of the production tank 1, flow downward through the inner wall of the production tank 1, and flow outward at the lateral air guide structure 53, thus forming a circulating airflow inside the production tank 1.

[0025] During the powder production process, an electric arc is generated between the iridium rod and electrode head 3, which act as electrodes. The iridium rod melts under the high temperature of the arc. As the mounting assembly 2 drives the iridium rod to rotate at high speed, the molten droplets formed by the iridium rod become ultrafine droplets and splash out along the airflow above the inside of the production tank 1. The airflow cools the ultrafine droplets as they flow, facilitating their solidification into powder. Furthermore, because the ultrafine droplets flow in the direction of the airflow, the gas inside the production tank 1 does not impede their movement, effectively preventing the ultrafine droplets from mixing together and resulting in smaller particle sizes, meeting the target particle size, and avoiding particle size unevenness. The airflow also cools the electrode head 3 as it passes through, extending its service life. The upper end of the electrode head 3 is composed of two frustum-shaped structures, which block the airflow flowing towards the electrode head 3. This airflow will not interfere with the electric arc, making the electric arc more stable, the size of the generated droplets more stable, and the size of the ultrafine droplets formed by the droplets more stable, resulting in a more uniform particle size of the powder.

[0026] The centrifugal force from the rotation of the iridium rod and the blowing effect of the airflow make the ultrafine droplets spread more widely and less likely to come into contact with each other, resulting in better powder quality.

[0027] During the powdering process, the gas inside the production tank 1 flows upward through the gas-gathering pipe 54 and mixes with the gas above the inside of the production tank 1. This mixture cools the gas above the inside of the production tank 1, preventing the formation of a high-temperature zone above the inside of the production tank 1 due to the presence of hot gas. This also prevents the temperature of the ultrafine droplets from slowing down due to overheating above the inside of the production tank 1.

[0028] During the powder making process, the airflow discharged from the gas gathering pipe 54 blows the ultrafine droplets upward, which increases the path that the ultrafine droplets and the powder formed take inside the production tank 1, increases the time that the ultrafine droplets and powder take to pass through the upper part of the production tank 1, increases their cooling time, and has a better cooling effect on them.

[0029] During the powder production process, when the powder falls to the water-cooling component 4, the lateral air guiding structure 53 blows a cold air mass cooled by the refrigeration structure 52 onto the powder, causing the powder to fall onto the surface of the water-cooling component 4 and be cooled. At the same time, the cold air mass blows the hot gas flowing downward near the inner wall of the production tank 1 toward the water-cooling component 4 for cooling. During this process, the cold air mass mixes with the hot gas, providing a double cooling effect on the hot gas. After the cooled mixed gas and powder enter the bottom of the inner side of the production tank 1, the powder is filtered by the filter structure 51, and the gas enters the refrigeration structure 52 for cooling. After being cooled, the gas flows to the lateral air guiding structure 53 and the fan blade 55 respectively. The gas that entered the lateral air guiding structure 53 is discharged again, cooling the hot gas outside the lateral air guiding structure 53. This provides a rapid circulation and cooling effect on the gas outside the lateral air guiding structure 53, which also accelerates the rate at which the gas passes through the refrigeration structure 52 and further improves the cooling capacity of the refrigeration structure 52 for the gas.

[0030] The water-cooling component 4 includes a water-cooling tank 41 fixedly installed in the lower part of the inner wall of the production tank 1, and a heat-conducting pipe 42 fixedly installed inside the water-cooling tank 41. The water-cooling tank 41 has an inlet at the lower side and an outlet at the upper side. Both the inlet and outlet penetrate the side wall of the production tank 1. The heat-conducting pipe 42 has a frustum-shaped structure with the upper opening larger than the lower opening. The powder falls along the inner wall of the heat-conducting pipe 42 to cool down.

[0031] The powder falls along the inner wall of the heat pipe 42, and the airflow also flows downward along the inner wall of the heat pipe 42, causing the powder to roll down quickly, preventing the powder from adhering to the inner wall surface of the heat pipe 42, and making the powder more dispersed on the inner wall of the heat pipe 42, resulting in a better cooling effect on the powder.

[0032] The production tank 1 has a mounting base 6 fixedly installed at its lower interior, a positioning base 7 fixedly installed at its bottom, and a positioning tube 8 fixedly installed above the mounting base 6. The cooling assembly 5 also includes a rotating shaft 56, a drive motor 57, a planetary gear set 58, and a connecting ring 59. The lower end of the rotating shaft 56 penetrates the bottom wall of the production tank 1 and is movably installed inside the mounting base 6 and the positioning base 7. The drive motor 57 is fixedly installed at the bottom of the positioning base 7, and the upper end of the rotating shaft 56 is movably installed inside the positioning tube 8. The sun gear of the planetary gear set 58 is fixedly installed on the outer side of the rotating shaft 56, and the outer ring of the planetary gear set 58 is fixedly installed on the inner side of the connecting ring 59. The lateral air guide structure 53 is fixedly installed directly above the connecting ring 59, and the fan blade 55 is fixedly installed on the outer side of the rotating shaft 56, located directly above the planetary gear set 58. The drive motor 57 drives the rotating shaft 56 to rotate, thereby driving the fan blade 55 and the planetary gear set 58 to work. The planetary gear set 58 drives the lateral air guide structure 53 to rotate through the connecting ring 59, promoting the flow of gas inside the production tank 1.

[0033] During the rotation of the shaft 56, the fan blades 55 rotate synchronously at high speed. The shaft 56, through the planetary gear set 58, drives the connecting ring 59 to rotate. During this rotation, the speed of the connecting ring 59 decreases significantly. When the connecting ring 59 drives the lateral air guide structure 53 to rotate, the speed of the lateral air guide structure 53 is much slower than that of the fan blades 55, making the overall operation of the device more stable. During the rotation of the lateral air guide structure 53, internal gas is discharged outwards, while the fan blades 55 discharge gas upwards, creating a negative pressure state inside the cooling assembly 5. This allows gas outside the cooling assembly 5 in the production tank 1 to be drawn into the cooling assembly 5 through the filter structure 51. During the powder filtration process, when a large amount of powder adheres to the outer surface of the filter structure 51, the cooling assembly 5's ability to absorb external gas decreases, causing the powder adhering to the outer surface of the filter structure 51 to fall off. The filter structure 51 vibrates during internal pressure changes and gas passage, shaking off the externally attached powder, thus automatically cleaning the powder.

[0034] The lateral air guiding structure 53 includes a rotating platform 531 and a flow divider 532. The rotating platform 531 has several arc-shaped exhaust grooves 9 inside. During the rotation of the rotating platform 531, the internal gas is discharged to the outside through the exhaust grooves 9. Each exhaust groove 9 is provided with multiple flow dividers 532 inside. The flow dividers 532 guide the airflow inside the rotating platform 531 to be discharged to the outside. The rotating platform 531 is fixedly installed directly above the connecting ring 59.

[0035] During the rotation of the rotating platform 531, the internal gas is discharged outward along the exhaust groove 9, reducing the internal air pressure of the rotating platform 531. The flow divider 532 is used to guide the airflow inside the rotating platform 531 to be discharged outward in a regular manner, so that the powder outside the rotating platform 531 can be blown evenly towards the water-cooling component 4.

[0036] The positioning tube 8 has a fixed mounting tube 11 installed on its upper side via a connecting plate 10. A support plate 12 is fixedly installed above the fixed mounting tube 11. A rotating table 531 is movably positioned directly above the support plate 12. A filter structure 51 is fixedly positioned below the fixed mounting tube 11. A refrigeration structure 52 is fixedly positioned inside the fixed mounting tube 11.

[0037] The filter structure 51 includes a filter layer 511 and a support layer 512. The support layer 512 is fixedly disposed between the fixing tube 11 and the mounting base 6. The filter layer 511 is sleeved on the outside of the support layer 512. The support layer 512 supports and positions the filter layer 511. The support layer 512 has several evenly spaced air holes inside for airflow to pass through. Both the filter layer 511 and the support layer 512 are frustum-shaped structures and are inverted.

[0038] The support layer 512 provides elastic support for the filter layer 511. The elastic shaking of the support layer 512 helps to shake off the powder adhering to the outside of the filter layer 511, thus preventing the filter layer 511 from reducing its filtration capacity.

[0039] The refrigeration structure 52 includes a gas venting tank 521 and an evaporator 522 fixedly installed inside the gas venting tank 521. The evaporator 522 is connected to an external heat exchange device of the production tank 1 to refrigerate the airflow passing through the gas venting tank 521.

[0040] The heat exchange equipment and evaporator 522 are used and connected using the existing connection methods.

[0041] The gas-gathering pipe 54 includes an upper pipe 541, a connecting pipe 542, and a lower pipe 543. The diameter of the upper pipe 541 is smaller than the diameter of the lower pipe 543 but larger than the maximum diameter of the electrode head 3. The connecting pipe 542 has a frustum-shaped structure and is fixedly connected to the upper pipe 541 and the lower pipe 543 respectively. The lower pipe 543 is fixedly connected to the production tank 1 through a connecting rod. The fan blade 55 is located in the middle of the inner side of the lower pipe 543.

[0042] The diameter of the upper tube 541 is smaller than that of the lower tube 543, which increases the airflow velocity generated by the fan blades 55 in the lower tube 543 after entering the upper tube 541, making it easier to disperse the droplets above. The diameter of the upper tube 541 is larger than the maximum diameter of the electrode head 3, which allows the airflow blown out along the inner wall of the upper tube 541 to push and guide a small amount of local airflow towards the frustum-shaped structure above the electrode head 3, resulting in better heat dissipation for the electrode head 3.

[0043] Among them, a discharge assembly 13 for discharging powder is fixedly installed on one side of the bottom of the production tank 1.

[0044] The fixed tube 11 is provided with a heat insulation layer 14 on the outside.

[0045] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for producing angstrom-sized elemental iridium powder based on plasma, characterized in that: The production is carried out using an elemental iridium powder preparation equipment, which includes a production tank, an installation assembly disposed inside the upper part of the production tank for mounting an iridium rod, an electrode head disposed in the middle of the production tank, a water cooling assembly disposed in the lower part of the inner wall of the production tank, and a cooling assembly disposed in the lower part of the production tank. The electrode head is located directly below the iridium rod. The upper end of the electrode head consists of two frustum-shaped structures, which are used to evenly distribute the upward airflow from the bottom to the surrounding area. The cooling assembly includes a filter structure, a cooling structure, a lateral air guiding structure, an air gathering pipe, and fan blades; Specifically, the following steps are included: Step 1: Purge the gas from the production tank and fill it with inert gas; Step 2: Pour cooling water into the water-cooling components; Step 3: Start the refrigeration structure to operate, driving the fan blades and lateral air guide structure to rotate, causing the gas inside the production tank to flow; Step 4: Start the installation assembly to rotate the iridium rod and energize the iridium rod and electrode head. An electric arc is generated between the iridium rod and the electrode head, and the iridium rod melts at high temperature to form molten droplets. As the iridium rod rotates at high speed, the molten droplets are ablated into ultrafine droplets and splashed around. At this time, the fan blades generate airflow in the gas collection tube. When the airflow passes the electrode head, it cools the electrode head. After passing the frustum-shaped section below the electrode head, the airflow flows obliquely upward, blowing the ultrafine droplets obliquely upward and accelerating the cooling of the ultrafine droplets into powder. The powder falls after reaching the highest point and is blown towards the water-cooling component when it falls to the side air guide structure. The powder and the gas here are cooled by the airflow of the side air guide structure and the water-cooling component. The powder is filtered by the filter structure, and the gas enters the filter structure and flows into the cooling structure to be cooled before flowing to the side air guide structure and the fan blades respectively.

2. The method for producing angstrom-sized elemental iridium powder based on plasma according to claim 1, characterized in that: The water-cooling assembly includes a water-cooling tank fixedly installed in the lower part of the inner wall of the production tank, and a heat-conducting pipe fixedly installed inside the water-cooling tank. The water-cooling tank has an inlet at the lower side and an outlet at the upper side, both of which penetrate the side wall of the production tank. The heat-conducting pipe has a frustum-shaped structure, with the upper opening larger than the lower opening. The powder falls along the inner wall of the heat-conducting pipe to cool down.

3. The method for producing angstrom-sized elemental iridium powder based on plasma according to claim 1, characterized in that: A mounting base is fixedly installed at the lower interior of the production tank, a positioning base is fixedly installed at the bottom of the production tank, and a positioning tube is fixedly installed above the mounting base. The cooling assembly also includes a rotating shaft, a drive motor, a planetary gear set, and a connecting ring. The lower end of the rotating shaft penetrates the bottom wall of the production tank and is movably disposed inside the mounting base and the positioning base. The drive motor is fixedly installed at the bottom of the positioning base, and the upper end of the rotating shaft is movably disposed inside the positioning tube. The sun gear of the planetary gear set is fixedly disposed on the outer side of the rotating shaft, and the outer ring of the planetary gear set is fixedly disposed on the inner side of the connecting ring. The lateral air guide structure is fixedly disposed directly above the connecting ring, and the fan blades are fixedly disposed on the outer side of the rotating shaft, with the fan blades located directly above the planetary gear set. The drive motor drives the rotating shaft to rotate, thereby driving the fan blades and the planetary gear set. The planetary gear set drives the lateral air guide structure to rotate through the connecting ring, promoting the flow of gas inside the production tank.

4. The method for producing angstrom-sized elemental iridium powder based on plasma according to claim 3, characterized in that: The lateral air guiding structure includes a rotating platform and a flow divider. The rotating platform has several arc-shaped exhaust slots inside. During the rotation of the rotating platform, the internal gas is discharged to the outside through the exhaust slots. Each exhaust slot is equipped with multiple flow dividers, which guide the airflow inside the rotating platform to be discharged outward. The rotating platform is fixedly installed directly above the connecting ring.

5. The method for producing angstrom-sized elemental iridium powder based on plasma according to claim 4, characterized in that: A retaining tube is fixedly installed on the upper side of the positioning tube via a connecting plate. A support plate is fixedly installed above the retaining tube. The rotating platform is movably positioned directly above the support plate. The filter structure is fixedly positioned below the retaining tube. The refrigeration structure is fixedly positioned inside the retaining tube.

6. The method for producing angstrom-sized elemental iridium powder based on plasma according to claim 5, characterized in that: The filter structure includes a filter layer and a support layer. The support layer is fixedly disposed between the fixing tube and the mounting base. The filter layer is sleeved on the outside of the support layer. The support layer supports and positions the filter layer. The support layer has several evenly spaced air vents inside. Both the filter layer and the support layer are frustum-shaped structures and are inverted.

7. The method for producing angstrom-sized elemental iridium powder based on plasma according to claim 5, characterized in that: The refrigeration structure includes a priming tank and an evaporator fixedly installed inside the priming tank. The evaporator is connected to an external heat exchange device of the production tank to cool the airflow passing through the priming tank.

8. The method for producing angstrom-sized elemental iridium powder based on plasma according to claim 1, characterized in that: The gas-gathering pipe includes an upper pipe, a connecting pipe, and a lower pipe. The diameter of the upper pipe is smaller than the diameter of the lower pipe but larger than the maximum diameter of the electrode head. The connecting pipe has a frustum-shaped structure and is fixedly connected to both the upper and lower pipes. The lower pipe is fixedly connected to the production tank via a connecting rod. The fan blade is located in the middle of the inner side of the lower pipe.

9. The method for producing angstrom-sized elemental iridium powder based on plasma according to claim 1, characterized in that: A powder discharge assembly is fixedly installed on one side of the bottom of the production tank.

10. A method for producing angstrom-sized elemental iridium powder based on plasma according to claim 5, characterized in that: The outside of the stationary tube is provided with a heat insulation layer.

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