High-purity zinc arsenide temperature control type synthetic furnace

Abstract

The invention relates to the technical field of zinc arsenide synthesis, and particularly discloses a high-purity zinc arsenide temperature control type synthetic furnace, which comprises a supporting assembly, a synthetic furnace and a reaction crucible, and is characterized in that the synthetic furnace is arranged on the supporting assembly, the synthetic furnace comprises a furnace body and a furnace cover, and the reaction crucible is arranged in the furnace body; a heat insulation layer and a heating layer are arranged on the inner wall of the furnace body, a heating mechanism is arranged in the heating layer, and the heating mechanism comprises a first heating assembly arranged in the side wall of the furnace body and a second heating assembly arranged in the bottom wall of the furnace body. The heating mechanism for controlling the temperature is arranged in the furnace body of the synthetic furnace and comprises the first heating assembly arranged in the side wall of the furnace body and the second heating assembly arranged in the bottom wall of the furnace body, so that uniform adjustment of heat in a heating area is realized, the temperature adjustment precision is improved, and the product purity is improved.

Description

Technical Field

[0001] This invention specifically relates to the field of zinc arsenide synthesis technology, and more specifically to a high-purity zinc arsenide temperature-controlled synthesis furnace. Background Technology

[0002] Zinc arsenide is a gray crystalline solid with a high melting point (1015℃) and is toxic. It is insoluble in water but soluble in dilute acids, producing arsine gas upon dissolution in acid. Zinc arsenide is commonly used as a reagent in spectroscopic analysis and as a raw material in the preparation of electronic components; it is also a novel semiconductor material. In the semiconductor materials industry, it is also used as a raw material or arsenic source for the preparation of gallium arsenide, indium arsenide, gallium arsenide phosphide, and indium arsenide phosphide semiconductor materials through epitaxy, chemical vapor deposition, and other methods, and its applications are becoming increasingly widespread.

[0003] Chinese patent application CN106365201B discloses an apparatus and method for preparing high-purity zinc arsenide. The method for preparing high-purity zinc arsenide is characterized by using the aforementioned apparatus, comprising: under nitrogen protection, pulverizing and mixing metallic arsenic and metallic zinc, and loading them into a sealed reactor through a raw material inlet; under nitrogen protection, initiating a reaction between metallic arsenic and metallic zinc in the reactor by heating with an electric heater; after the reaction starts, heating is stopped, and the heat generated by the reaction sustains the reaction; after the reaction is completed, the mixture is naturally cooled under nitrogen protection to obtain high-purity zinc arsenide. Although this invention continuously uses high-purity nitrogen to purge the reaction process, which can remove impurities and obtain high-purity zinc arsenide, it still suffers from technical problems such as a long synthesis time for zinc arsenide, uneven heating of raw materials during the reaction, and inaccurate temperature control. Summary of the Invention

[0004] The purpose of this invention is to provide a high-purity zinc arsenide temperature-controlled synthesis furnace to solve the technical problems mentioned in the background art, such as long synthesis process time, uneven heating of raw materials during reaction, and inaccurate temperature control.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-purity zinc arsenide temperature-controlled synthesis furnace includes a support assembly, a synthesis furnace, and a reaction crucible. The synthesis furnace is mounted on the support assembly and includes a furnace body and a furnace cover. The reaction crucible is disposed inside the furnace body. The inner wall of the furnace body is provided with a heat insulation layer and a heating layer, and a heating mechanism is disposed inside the heating layer. The inner wall of the furnace body includes a side wall and a bottom wall, with the bottom wall located below the side wall. The heating mechanism includes a first heating component disposed in the side wall of the furnace body and a second heating component disposed in the bottom wall of the furnace body. The second heating component includes a heating base and several components evenly installed around the heating base. The heater comprises several heaters forming a heating area around the heating base, which is located at the bottom of the furnace body. The heating area is equally divided into multiple heating sub-areas, each containing a number of heaters, with each sub-area having the same number of heaters. The first heating assembly includes several annular heating tubes evenly distributed in the side wall of the furnace body. These annular heating tubes form an annular auxiliary heating area inside the side wall. The auxiliary heating area is evenly divided into multiple auxiliary heating sub-areas from top to bottom, each containing a number of annular heating tubes, with each sub-area having the same number of annular heating tubes.

[0007] As a further aspect of the present invention: the second heating assembly further includes a rotating seat rotatably mounted on the bottom of the heating seat, the bottom of the heating seat being provided with a plurality of heating buttons, the heating buttons being electrically connected to the heater; the rotating seat being provided with a plurality of control top blocks on the side facing the heating seat, the number of control top blocks being the same as the number of heating sub-areas, the control top blocks being used to press the heating buttons, causing the heating buttons to change from an open state to a closed state, thereby activating the heater.

[0008] As a further embodiment of the present invention: the interior of the furnace body is further provided with a second drive assembly for controlling the rotation of the rotating seat. The second drive assembly includes a rotary motor, a drive gear fixedly installed at the output end of the rotary motor, and a driven gear fixedly installed on the rotating seat. The driven gear meshes with the drive gear.

[0009] As a further embodiment of the present invention: two sets of support components are symmetrically arranged on the left and right sides of the synthesis furnace. The support components include a support frame, a fixed seat, and a connecting frame connecting the support frame and the fixed seat. The fixed seat is located above the synthesis furnace and a lifting mechanism is installed on the fixed seat. The lifting mechanism is used to cooperate with the hook to open the furnace cover of the synthesis furnace.

[0010] As a further embodiment of the present invention: the left and right sides of the furnace body are rotatably mounted on the connecting frame via a rotating shaft, and a control motor for controlling the rotation of the rotating shaft is provided on one side of the connecting frame.

[0011] As a further embodiment of the present invention: the reaction crucible includes a crucible body and a frame fixedly mounted on the crucible body. The frame is rotatably connected to the inner wall of the furnace body. A feed inlet is provided on the crucible body, and a feed pipe is provided on the frame, with the feed pipe communicating with the feed inlet. A discharge outlet is provided at the bottom of the crucible body, and a connecting pipe is installed on the crucible body at the discharge outlet. The connecting pipe is connected to the feed pipe through at least one circulation pipe.

[0012] As a further embodiment of the present invention: a sealing plug for blocking the feed pipe is provided at the bottom of the furnace cover, a plurality of first through holes are provided on the periphery of the sealing plug, and a discharge port is provided at the bottom of the sealing plug, the first through holes being connected to the discharge port; a plurality of second through holes are provided on the feed pipe, the second through holes being correspondingly provided, and the second through holes being connected to the circulation pipe.

[0013] As a further embodiment of the present invention: a first air intake pump and an air extraction pump are also installed inside the furnace cover, and the exhaust end of the first air intake pump and the air intake end of the air extraction pump are connected to the material discharge port.

[0014] As a further embodiment of the present invention: a rotating shaft is rotatably mounted on the bottom of the furnace body, one end of the rotating shaft is connected to a connecting pipe, and the other end of the rotating shaft extends out of the furnace body and is connected to a first driving assembly. The first driving assembly controls the rotating shaft to rotate, thereby driving the crucible body to rotate inside the furnace body.

[0015] As a further embodiment of the present invention: a first support is provided at the bottom of the furnace body, a second support is installed at the bottom of the first support, and a second air pump is installed on the second support; the rotating shaft is a hollow structure, and an air pipe is slidably installed inside the rotating shaft. The lower end of the air pipe is connected to the second air pump, and an exhaust port is opened on the circumference of the upper end of the air pipe. The upper end of the rotating shaft is provided with a feeding channel corresponding to the exhaust port. The feeding channel is an L-shaped structure, and the vertical section of the feeding channel is connected to a connecting pipe.

[0016] As a further embodiment of the present invention: the rotating shaft has an internal mounting groove, the air pipe has a slider, and the slider is connected to one side of the mounting groove by a return spring; the second bracket has a telescopic rod, the telescopic end of the telescopic rod has a top block fixedly mounted on it, and the lower end of the air pipe has a boss that cooperates with the top block. When the telescopic end of the telescopic rod extends, the top block squeezes the boss, causing the boss to drive the feed pipe to move, thereby connecting the exhaust port with the horizontal section of the feed channel.

[0017] As a further embodiment of the present invention: a connector is installed on the second bracket, one end of the connector is rotatably connected to the lower end of the air tube, and the other end of the connector is connected to a hose, which is connected to the second air intake pump.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a temperature-controlled heating mechanism in the furnace body of the synthesis furnace. This heating mechanism includes a first heating component disposed in the side wall of the furnace body and a second heating component disposed in the bottom wall of the furnace body. The second heating component includes a heating base and a plurality of heaters evenly installed around the heating base. The first heating component includes a plurality of annular heating tubes evenly distributed in the side wall of the furnace body. By changing the number of heaters turned on in each heating sub-region, the heating amount of the heating sub-region can be adjusted. When adjusting the heating amount, it is ensured that the number of heaters turned on in each heating sub-region is the same, so as to achieve uniform adjustment of the heat in the heating area. By using the first heating component and the second heating component in combination for temperature adjustment, the temperature adjustment accuracy is improved, which is more conducive to improving the purity of the product. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a temperature-controlled synthesis furnace for high-purity zinc arsenide.

[0020] Figure 2 This is a top view of a temperature-controlled synthesis furnace for high-purity zinc arsenide.

[0021] Figure 3 This is a cross-sectional view of the synthesis furnace in a temperature-controlled synthesis furnace for high-purity zinc arsenide.

[0022] Figure 4 This is a schematic diagram of the reaction crucible in a temperature-controlled synthesis furnace for high-purity zinc arsenide.

[0023] Figure 5 for Figure 3 A magnified view of a portion of point A in the middle.

[0024] Figure 6 for Figure 3 A magnified view of a portion of point B in the middle.

[0025] Figure 7 This is a schematic diagram of the second heating component in a temperature-controlled synthesis furnace for high-purity zinc arsenide.

[0026] Figure 8 This is a top view of the second heating component in a temperature-controlled synthesis furnace for high-purity zinc arsenide.

[0027] Figure 9 This is a schematic diagram of the first heating component in a temperature-controlled synthesis furnace for high-purity zinc arsenide.

[0028] Figure 10 This is a schematic diagram of the heating mechanism in a temperature-controlled synthesis furnace for high-purity zinc arsenide.

[0029] Figure 11 This is a schematic diagram of the rotating shaft and gas pipe in a temperature-controlled synthesis furnace for high-purity zinc arsenide.

[0030] Figure 12 This is a schematic diagram of the sealing plug and feed pipe in a temperature-controlled synthesis furnace for high-purity zinc arsenide.

[0031] In the diagram: 10-Support assembly, 11-Support frame, 12-Connecting frame, 13-Fixed seat, 20-Synthesis furnace, 21-Furnace cover, 211-Sealing plug, 212-First air inlet pump, 213-Ejection pump, 214-First through hole, 215-Feeding port, 22-Furnace body, 221-Insulation layer, 222-Heating layer, 23-Rotating shaft, 231-Feeding channel, 232-Mounting groove, 24-First bracket, 25-Second bracket, 251-Telescopic rod, 252-Top block, 26-Gas pipe, 261-Boss, 262-Exhaust port, 26 3-Slider, 264-Reset spring, 27-First drive assembly, 28-Second air pump, 30-Lifting mechanism, 40-Reaction crucible, 41-Crucible body, 411-Inlet, 412-Outlet, 42-Frame, 43-Inlet pipe, 431-Second through hole, 44-Connecting pipe, 45-Circulation pipe, 50-Heating mechanism, 51-First heating assembly, 52-Second heating assembly, 521-Heating seat, 522-Rotating seat, 523-Heater, 524-Second drive assembly, 525-Heating button, 526-Control top block. Detailed Implementation

[0032] 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.

[0033] Please see Figures 1-12 In this embodiment of the invention, a high-purity zinc arsenide temperature-controlled synthesis furnace includes a support assembly 10, a synthesis furnace 20, and a reaction crucible 40. The synthesis furnace 20 is mounted on the support assembly 10 and includes a furnace body 22 and a furnace cover 21. The reaction crucible 40 is disposed inside the furnace body 22 and serves as a reaction container to provide reaction space for the raw materials, allowing the raw materials to synthesize zinc arsenide under certain reaction conditions. The inner wall of the furnace body 22 is provided with a heat insulation layer 221 and a heating layer 222, such as... Figure 3 As shown, the heat insulation layer 221 is disposed on the outside of the heating layer 222, and the heating layer 222 is provided with a heating mechanism 50 inside, which is used to control the reaction temperature;

[0034] Please see Figure 3 as well as Figures 7-9In this embodiment, the inner wall of the furnace body 22 includes a side wall and a bottom wall, with the bottom wall located below the side wall. The heating mechanism 50 includes a first heating component 51 disposed in the side wall of the furnace body 22 and a second heating component 52 disposed in the bottom wall of the furnace body 22. The second heating component 52 includes a heating base 521 and a plurality of heaters 523 evenly installed around the heating base 521. Figure 8 As shown, a plurality of heaters 523 form a circular heating area around the heating base 521. This heating area is located at the bottom of the furnace body 22. The heat generated by the heating area radiates upwards from the bottom of the furnace body 22 toward the reaction crucible 40, so that the bottom of the reaction crucible 40 is uniformly heated. The heating area is divided into multiple heating sub-areas, and each heating sub-area is provided with a plurality of heaters 523, and the number of heaters 523 in each heating sub-area is equal. It can be understood that by changing the number of heaters 523 turned on in each heating sub-area, the heating amount of the heating sub-area can be adjusted, thereby adjusting the heating amount of the entire heating area. Since the heating sub-areas inside the heating area are evenly distributed and the number of heaters 523 in each heating sub-area is equal, when adjusting the heating amount, ensuring that the number of heaters 523 turned on in each heating sub-area is the same can achieve uniform adjustment of the heat in the heating area.

[0035] Please see Figure 9 The first heating component 51 includes several annular heating tubes evenly distributed in the side wall of the furnace body 22. These annular heating tubes form an annular auxiliary heating region inside the side wall. The auxiliary heating region is evenly divided into multiple auxiliary heating sub-regions from top to bottom. Each auxiliary heating sub-region is equipped with several annular heating tubes, and the number of annular heating tubes in each sub-region is the same. It should be noted that in the zinc arsenide synthesis reaction, the auxiliary heating region is used to maintain the target temperature required for the reaction. The auxiliary heating region adjusts the temperature when the reaction temperature deviates from the target temperature and further increases the temperature after the heating amount in the heating region reaches its maximum value. In this embodiment, the auxiliary heating is evenly divided into multiple auxiliary heating sub-regions, and each auxiliary heating sub-region is activated simultaneously. The annular heating tubes within the sub-regions achieve uniform heating of the internal environment of the furnace body 22. Further temperature adjustment can be achieved by controlling the number of annular heating tubes activated within each auxiliary heating sub-region. In this embodiment, the first heating component 51 acts as an auxiliary adjustment mechanism with a smaller temperature adjustment range than the second heating component 52. For example, the temperature adjustment range of the second heating component 52 is 100°C, while the temperature adjustment range of the first heating component 51 is 10°C. The first heating component 51 works in conjunction with the second heating component 52 to improve temperature adjustment accuracy. Furthermore, it should be noted that temperature monitoring inside the furnace body 22 and the reaction crucible 40 can be achieved using existing technologies, which will not be elaborated upon in this embodiment.

[0036] Please refer to it again. Figure 8 and Figure 9 In some embodiments of this application, the heating area is divided into four heating sub-regions, labeled A, B, C, and D. Each heating sub-region contains five heaters 523. In a counter-clockwise direction, the five heaters 523 in region A are labeled A1, A2, A3, A4, and A5, and the heaters 523 in the other regions are named in the same manner. When the furnace body 22 needs to be heated, heaters A1, B1, C1, and D1 are activated simultaneously to bring the internal temperature of the furnace body 22 to the preset reaction temperature, for example, 500°C. After preheating, the individual heaters are adjusted... The number of heaters 523 activated within the zone can adjust the reaction temperature. For example, if the reaction temperature is 600℃, then heaters A1, A2, B1, B2, C1, C2, D1, and D2 need to be activated simultaneously. Furthermore, the auxiliary heating zone is evenly divided into four auxiliary heating sub-zones from top to bottom, labeled as zone a, zone b, zone c, and zone d. Each auxiliary heating sub-zone contains five annular heating tubes. The five annular heating tubes in zone a are labeled as heaters a1, a2, a3, a4, and a5 from top to bottom. The temperature adjustment method of the auxiliary heating zone is the same as that of the heating zone.

[0037] Please refer to it again. Figure 3 , Figure 5 , Figure 7 as well as Figure 10 The second heating assembly 52 further includes a rotating seat 522 rotatably mounted on the bottom of the heating base 521. The bottom of the heating base 521 is provided with a plurality of heating buttons 525, the same number as the heater 523. The heating buttons 525 are elastic buttons and are electrically connected to the heater 523. The rotating seat 522 has a plurality of control top blocks 526 on the side facing the heating base 521, the same number as the heating sub-area. The control top blocks 526 are used to open and close the heating buttons 525. When the rotating seat 522 rotates, the control top blocks 526 sequentially press the multiple heating buttons 525 in the heating sub-area, causing the heating buttons 525 to change from an open state to a closed state, thereby activating the heater 523. It should be noted that, in order of rotation of the rotating seat 522, the heating buttons 525 in the heating sub-area are {f1, f2, f3, ..., f...}. i ,…,f n}, f i This indicates the i-th heating button (525), and the heating button f. i The controlled heater 523 is assembled as {g i ,g i-1 ,g i-2 ,…,g i-j ,g1},g i-j>0, that is, heating button 525 with sequence 1 controls the first heater 523 in the heating sub-area, heating button 525 with sequence 2 controls the first and second heaters 523 in the heating sub-area, and so on, so that multiple heaters 523 can be controlled to work synchronously by heating button 525;

[0038] Furthermore, in some embodiments of this application, the interior of the furnace body 22 is also provided with a second drive assembly 524 for controlling the rotation of the rotating seat 522. The second drive assembly 524 includes a rotary motor, a drive gear fixedly mounted on the output end of the rotary motor, and a driven gear fixedly mounted on the rotating seat 522. The driven gear meshes with the drive gear.

[0039] Please refer to it again. Figure 1 and Figure 2 In some embodiments of this application, two sets of support components 10 are symmetrically arranged on the left and right sides of the synthesis furnace 20. The support components 10 include a support frame 11, a fixed seat 13, and a connecting frame 12 connecting the support frame 11 and the fixed seat 13. The fixed seat 13 is located above the synthesis furnace 20, and a lifting mechanism 30 is installed on the fixed seat 13. The lifting mechanism 30 is used to open the furnace cover 21 of the synthesis furnace 20 with the help of a hook. It should be noted that the furnace cover 21 is detachably connected to the furnace body 22, for example, by bolts. When the raw materials inside the synthesis furnace 20 react, the furnace cover 21 and the furnace body 22 are closed to form a sealed reaction space inside the furnace body 22. After the reaction is completed, the bolts are removed, and the furnace cover 21 and the furnace body 22 can be separated. The furnace cover 21 can be opened by the lifting mechanism 30 with the help of a hook.

[0040] Furthermore, in this embodiment of the application, the left and right sides of the furnace body 22 are rotated to the connecting frame 12 via a rotating shaft. One of the connecting frames 12 is provided with a control motor (not shown in the figure) for controlling the rotation of the rotating shaft, which is used to control the rotation of the furnace body 22 during the reaction inside the furnace body 22.

[0041] Please see Figure 3 and Figure 4In this embodiment, the reaction crucible 40 includes a crucible body 41 and a frame 42 fixedly mounted on the crucible body 41. The frame 42 is rotatably connected to the inner wall of the furnace body 22. A feed inlet 411 is provided on the crucible body 41, and a feed pipe 43 is provided on the frame 42. The feed pipe 43 communicates with the feed inlet 411, and the reaction raw materials are added into the crucible body 41 through the feed pipe 43 and the feed inlet 411. A discharge outlet 412 is provided at the bottom of the crucible body 41, and a connecting pipe 44 is installed at the discharge outlet 412. The connecting pipe 44 is connected to the feed pipe 43 through at least one circulation pipe 45. In the zinc arsenide synthesis process, the raw materials are mainly metallic arsenic and metallic zinc. The powder enters the crucible body 41 from the feed pipe 43 according to the pre-configured ratio and accumulates. After the reaction starts, the furnace body 22 heats up, and the crucible body 41 and the frame 42 rotate inside the furnace body 22. The raw materials inside the crucible body 41 enter the circulation pipe 45 under the action of centrifugal force, which disperses the raw materials and increases the heating area of ​​the raw materials, so that the raw materials heat up quickly. During the rotation of the crucible body 41, the furnace body 22 rotates on the connecting frame 12 with the rotating shaft as the center. The raw material powder inside the circulation pipe 45 flows back into the crucible body 41 from the feed pipe 43, further improving the heating efficiency of the raw materials. When the temperature of the crucible body 41 reaches the reaction temperature, the raw material powder vaporizes to form a gas phase and reacts inside the crucible body 41 to synthesize zinc arsenide.

[0042] Please see Figure 3 , Figure 4 as well as Figure 12 The bottom of the furnace cover 21 is provided with a sealing plug 211 to block the feed pipe 43. The sealing plug 211 has several first through holes 214 on its periphery and a discharge port 215 at its bottom. The first through holes 214 are connected to the discharge port 215. The feed pipe 43 has several second through holes 431, which are correspondingly arranged and connected to the circulation pipe 45. When the furnace body 22 is in the open state, the reaction raw materials are added into the crucible body 41 through the feed pipe 43. After the feeding is completed, the furnace cover 21 is installed on the furnace body 22, and the sealing plug 211 blocks the feed pipe 43. The first through holes 214 and the second through holes 431 are connected.

[0043] Furthermore, in this embodiment, the furnace cover 21 is also equipped with a first air intake pump 212 and a vacuum pump 213. The exhaust end of the first air intake pump 212 and the air intake end of the vacuum pump 213 are connected to the feeding port 215. After the material is added, the vacuum pump 213 is used to evacuate the inside of the crucible body 41. Then, the first air intake pump 212 introduces inert gas into the inside of the crucible body 41. Subsequently, the crucible body 41 is heated to carry out the heating synthesis reaction.

[0044] Please refer to it again. Figure 3 as well as Figure 6 A rotating shaft 23 is rotatably mounted on the bottom of the furnace body 22. One end of the rotating shaft 23 is connected to the connecting pipe 44, and the other end of the rotating shaft 23 extends out of the furnace body 22 and is connected to the first drive assembly 27. The first drive assembly 27 controls the rotating shaft 23 to rotate, thereby driving the crucible body 41 to rotate inside the furnace body 22.

[0045] Furthermore, in this embodiment of the application, a first support 24 is provided at the bottom of the furnace body 22, and the first drive assembly 27 is mounted on the first support 24. The first drive assembly 27 includes a drive motor and a gearbox, and the drive motor is connected to the rotating shaft 23 through the gearbox.

[0046] To improve the synthesis purity of zinc arsenide and avoid the reaction of excessive arsenic to produce blackish-gray zinc diarsenide, a second support 25 is installed at the bottom of the first support 24, and a second air intake pump 28 is installed on the second support 25; Figure 11 As shown, the rotating shaft 23 is a hollow structure, and an air pipe 26 is slidably installed inside the rotating shaft 23. The lower end of the air pipe 26 is connected to the second air pump 28, and an exhaust port 262 is provided on the circumference of the upper end of the air pipe 26. The upper end of the rotating shaft 23 is provided with a feed channel 231 corresponding to the exhaust port 262. The feed channel 231 has an L-shaped structure, and the vertical section of the feed channel 231 is connected to the connecting pipe 44. In the initial state, the exhaust port 262 is separated from the feed channel 231, and the material enters the interior of the connecting pipe 44 from the crucible body 41 through the discharge port 412. The raw materials cannot enter the gas pipe 26 through the exhaust port 262. After the reaction is completed, the zinc arsenide synthesized by the reaction accumulates at the bottom of the crucible body 41. By adjusting the sliding position of the connecting pipe 44 inside the rotating shaft 23, the exhaust port 262 is connected to the horizontal section of the feed channel 231. The second air pump 28 is used to introduce inert gas into the gas pipe 26, so that the inert gas enters the crucible body 41 and purges the inside of the crucible body 41. During this process, the vacuum pump 213 is started to extract the excess gas phase to prevent excessive arsenic from continuing to react and generate zinc diarsenide.

[0047] Furthermore, in this embodiment, the rotating shaft 23 has an internal mounting groove 232, and the air pipe 26 is provided with a slider 263. The slider 263 is connected to one side of the mounting groove 232 through a return spring 264. The second bracket 25 is equipped with a telescopic rod 251. A top block 252 is fixedly installed at the telescopic end of the telescopic rod 251. A boss 261 that cooperates with the top block 252 is fixedly installed at the lower end of the air pipe 26. After the telescopic end of the telescopic rod 251 is extended, the top block 252 presses the boss 261, causing the boss 261 to drive the feed pipe 26 to move, thereby connecting the exhaust port 262 with the horizontal section of the feed channel 231.

[0048] It should be noted that, since the air tube 26 is slidably mounted on the rotating shaft 23, the air tube 26 rotates synchronously with the rotating shaft 23, and the air tube 26 needs to move up and down. In this embodiment, a connector is installed on the second bracket 25. One end of the connector is rotatably connected to the lower end of the air tube 26, and the other end of the connector is connected to a hose. The hose is connected to the second air pump 28.

[0049] In summary, this invention provides a temperature-controlled heating mechanism within the synthesis furnace body. This mechanism includes a first heating component located in the side wall of the furnace body and a second heating component located in the bottom wall of the furnace body. The second heating component includes a heating base and several heaters evenly installed around the heating base. The first heating component includes several annular heating tubes evenly distributed in the side wall of the furnace body. By changing the number of heaters activated in each heating sub-region, the heating amount of the heating sub-region can be adjusted. When adjusting the heating amount, it is ensured that the number of heaters activated in each heating sub-region is the same, achieving uniform heat adjustment in the heating area. By using the first and second heating components in combination for temperature adjustment, the temperature adjustment accuracy is improved, which is more conducive to improving product purity.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-purity zinc arsenide temperature-controlled synthesis furnace, comprising a support assembly (10), a synthesis furnace (20), and a reaction crucible (40), wherein the synthesis furnace (20) is mounted on the support assembly (10), the synthesis furnace (20) comprises a furnace body (22) and a furnace cover (21), and the reaction crucible (40) is disposed inside the furnace body (22), characterized in that, The inner wall of the furnace body (22) is provided with a heat insulation layer (221) and a heating layer (222). The heating layer (222) is provided with a heating mechanism (50). The heating mechanism (50) includes a first heating component (51) disposed in the side wall of the furnace body (22) and a second heating component (52) disposed in the bottom wall of the furnace body (22). The second heating component (52) includes a heating base (521) and a plurality of heaters (523) evenly installed around the heating base (521). The plurality of heaters (523) are located on the heating base (521). A heating area is formed around the perimeter of the furnace body (22), and the heating area is divided into multiple heating sub-areas. Each heating sub-area is provided with a number of heaters (523), and the number of heaters (523) in each heating sub-area is equal. The first heating component (51) includes a number of annular heating tubes evenly distributed in the side wall of the furnace body (22). The number of annular heating tubes forms an annular auxiliary heating area inside the side wall. The auxiliary heating area is evenly divided into multiple auxiliary heating sub-areas from top to bottom. Each auxiliary heating sub-area is provided with a number of annular heating tubes, and the number of annular heating tubes in each auxiliary heating sub-area is the same.

2. The high-purity zinc arsenide temperature-controlled synthesis furnace according to claim 1, characterized in that, The second heating assembly (52) further includes a rotating seat (522) rotatably mounted on the bottom of the heating seat (521). The bottom of the heating seat (521) is provided with a plurality of heating buttons (525), which are electrically connected to the heater (523). The rotating seat (522) is provided with a plurality of control top blocks (526) on the side facing the heating seat (521). The number of control top blocks (526) is the same as the number of heating sub-areas. The control top blocks (526) are used to press the heating buttons (525) to change the heating buttons (525) from the open state to the closed state, so as to start the heater (523).

3. The high-purity zinc arsenide temperature-controlled synthesis furnace according to claim 2, characterized in that, The furnace body (22) is also provided with a second drive assembly (524) for controlling the rotation of the rotating seat (522). The second drive assembly (524) includes a rotary motor, a drive gear fixedly installed at the output end of the rotary motor, and a driven gear fixedly installed on the rotating seat (522). The driven gear meshes with the drive gear.

4. The high-purity zinc arsenide temperature-controlled synthesis furnace according to claim 1, characterized in that, The support components (10) are symmetrically arranged in two sets on the left and right sides of the synthesis furnace (20). The support components (10) include a support frame (11), a fixed seat (13), and a connecting frame (12) connecting the support frame (11) and the fixed seat (13). The fixed seat (13) is located above the synthesis furnace (20). A lifting mechanism (30) is installed on the fixed seat (13). The lifting mechanism (30) is used to cooperate with the hook to open the furnace cover (21) of the synthesis furnace (20).

5. The high-purity zinc arsenide temperature-controlled synthesis furnace according to claim 4, characterized in that, The left and right sides of the furnace body (22) are rotatably mounted on the connecting frame (12) via a rotating shaft, and a control motor for controlling the rotation of the rotating shaft is provided on one side of the connecting frame (12).

6. The high-purity zinc arsenide temperature-controlled synthesis furnace according to claim 1, characterized in that, The reaction crucible (40) includes a crucible body (41) and a frame (42) fixedly installed on the crucible body (41). The frame (42) is rotatably connected to the inner wall of the furnace body (22). The crucible body (41) has a feed inlet (411), and the frame (42) is provided with a feed pipe (43). The feed pipe (43) is connected to the feed inlet (411). The bottom of the crucible body (41) has a discharge outlet (412). A connecting pipe (44) is installed on the crucible body (41) at the discharge outlet (412). The connecting pipe (44) is connected to the feed pipe (43) through at least one circulation pipe (45).

7. The high-purity zinc arsenide temperature-controlled synthesis furnace according to claim 6, characterized in that, The bottom of the furnace cover (21) is provided with a sealing plug (211) to block the feed pipe (43). The sealing plug (211) has several first through holes (214) on its periphery and a discharge port (215) at the bottom. The first through holes (214) are connected to the discharge port (215). The feed pipe (43) has several second through holes (431) on it. The second through holes (431) are correspondingly arranged and are connected to the circulation pipe (45).

8. The high-purity zinc arsenide temperature-controlled synthesis furnace according to claim 7, characterized in that, The furnace cover (21) is also equipped with a first air intake pump (212) and an air extraction pump (213). The exhaust end of the first air intake pump (212) and the air intake end of the air extraction pump (213) are connected to the discharge port (215).

9. The high-purity zinc arsenide temperature-controlled synthesis furnace according to claim 8, characterized in that, A rotating shaft (23) is rotatably mounted on the bottom of the furnace body (22). One end of the rotating shaft (23) is connected to the connecting pipe (44), and the other end of the rotating shaft (23) extends out of the furnace body (22) and is connected to the first drive assembly (27). The first drive assembly (27) controls the rotating shaft (23) to rotate, so as to drive the crucible body (41) to rotate inside the furnace body (22).

10. The high-purity zinc arsenide temperature-controlled synthesis furnace according to claim 9, characterized in that, The bottom of the furnace body (22) is provided with a first support (24), and a second support (25) is installed at the bottom of the first support (24). A second air pump (28) is installed on the second support (25). The rotating shaft (23) is a hollow structure. An air pipe (26) is slidably installed inside the rotating shaft (23). The lower end of the air pipe (26) is connected to the second air pump (28). An exhaust port (262) is opened on the circumference of the upper end of the air pipe (26). The upper end of the rotating shaft (23) is provided with a feeding channel (231) corresponding to the exhaust port (262). The feeding channel (231) is an L-shaped structure. The vertical section of the feeding channel (231) is connected to the connecting pipe (44).

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