Synthesis crucible of silicon carbide powder

Abstract

The utility model discloses a silicon carbide powder synthesis crucible which at least comprises at least one layer of crucible combination, each layer of crucible combination comprises a plurality of crucible bodies which are annularly arranged, and after the plurality of crucible bodies are annularly arranged, a hole is formed in the center of the crucible combination; the cover plate is arranged on the crucible combination; the first thread is arranged on the outer wall, close to one side of the hole, of the crucible body; the lifting handle is allowed to be placed in the hole; and the second thread is arranged on the lifting handle, and the second thread is matched with the first thread. According to the synthesis crucible provided by the utility model, the difficulty of taking materials from the synthesis crucible can be reduced, the corrosion to the internal structure of the synthesis crucible in the synthesis process is avoided, the service life of the synthesis crucible is prolonged, and the synthesis cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of silicon carbide synthesis technology, specifically to a silicon carbide powder synthesis crucible. Background Technology

[0002] Silicon carbide, as a representative semiconductor material, possesses excellent physical properties, meeting the requirements of power electronics technology for harsh operating conditions such as high temperature, high power, high voltage, high frequency, and radiation resistance. It is widely used in modern industrial fields such as new energy vehicles, 5G communications, photovoltaic power generation, rail transportation, smart grids, and aerospace, playing a crucial role in various major areas of my country's "new infrastructure" initiative. As a raw material for silicon carbide crystal growth, the particle size, crystal form, purity, packing density, and shape of silicon carbide powder significantly affect the quality of silicon carbide crystals.

[0003] As a device for synthesizing silicon carbide powder, the crucible has several drawbacks during the synthesis process. On the one hand, the crucible is hot at the edges and cold at the center, causing the powder to accumulate and clump together in the center, greatly increasing the difficulty of subsequent material removal. On the other hand, the fumed silicon in the synthesis process corrodes the internal threaded structure of the crucible, leading to increased synthesis costs and reduced market competitiveness. Utility Model Content

[0004] The purpose of this invention is to provide a synthesis crucible for silicon carbide powder, which can reduce the difficulty of taking materials out of the synthesis crucible, avoid corrosion of the internal structure of the synthesis crucible during the synthesis process, improve the service life of the synthesis crucible, and reduce the synthesis cost.

[0005] To achieve the above-mentioned and other related objectives, this utility model is implemented through the following technical solution.

[0006] This utility model provides a silicon carbide powder synthesis crucible, comprising at least:

[0007] At least one crucible assembly, each crucible assembly comprising a plurality of crucible bodies arranged in a ring, wherein the plurality of crucible bodies, when arranged in a ring, form a hole in the center of the crucible assembly;

[0008] A cover plate is provided on the crucible assembly;

[0009] The first thread is provided on the outer wall of the crucible body on the side near the hole;

[0010] A handle allows placement within the hole; and

[0011] A second thread is provided on the handle, and the second thread matches the first thread.

[0012] In one embodiment of the present invention, the crucible body includes a bottom and a side portion, the side portion is disposed around the bottom, and an opening is provided on the side of the crucible body away from the bottom.

[0013] In one embodiment of the present invention, a protrusion is provided on the crucible body, and the protrusion extends from the bottom in a direction away from the opening.

[0014] In one embodiment of this utility model, the shape and size of the protrusion projected onto the crucible body are the same as the shape and size of the opening.

[0015] In one embodiment of this utility model, for two adjacent crucible assemblies, the protrusion of the crucible body in the upper crucible assembly engages with the opening of the crucible body in the lower crucible assembly.

[0016] In one embodiment of the present invention, the handle includes a first portion, which allows the first portion to be placed inside the hole, and the height of the first portion is greater than or equal to the height of one layer of the crucible assembly.

[0017] In one embodiment of the present invention, the handle includes a second portion, which is arranged perpendicular to the first portion.

[0018] In one embodiment of the present invention, the second thread is disposed on the side wall of the first portion away from the second portion.

[0019] In one embodiment of this utility model, the cross-section of the crucible body is fan-shaped, and the hole is circular.

[0020] In one embodiment of this utility model, when the crucible assembly is multi-layered, the multi-layered crucible assemblies are stacked and arranged, and the centers of the multi-layered crucible assemblies are on the same straight line.

[0021] In summary, this invention provides a synthesis crucible for silicon carbide powder. By improving the structure of the synthesis crucible, the heat distribution within the crucible becomes more uniform, alleviating the agglomeration of raw materials and thus reducing the difficulty of material removal. Furthermore, the synthesis crucible provided by this invention can prevent corrosion of the internal components during the synthesis process, increasing the service life of the synthesis crucible and reducing synthesis costs.

[0022] Of course, implementing any of the methods of this utility model does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a silicon carbide powder synthesis crucible in one embodiment of the present invention.

[0025] Figure 2 for Figure 1 A diagram of the handle.

[0026] Figure 3 for Figure 1 A schematic diagram of the middle cover plate.

[0027] Figure 4 for Figure 3 Top view of the middle cover plate.

[0028] Figure 5 for Figure 1 A schematic diagram of the crucible body.

[0029] Figure 6 for Figure 1 Top view of the crucible assembly.

[0030] Marker explanation:

[0031] 11. Crucible assembly; 111. First layer assembly; 112. Second layer assembly; 113. Third layer assembly; 114. Fourth layer assembly; 12. Crucible body; 121. Bottom; 122. Side; 123. Opening; 124. Protrusion; 13. Hole; 14. Cover plate; 15. First thread; 16. Handle; 161. First section; 162. Second section; 163. Second thread. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this utility model can be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0033] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] In this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used only for descriptive and distinguishing purposes and should not be construed as indicating or implying relative importance.

[0035] Please see Figures 1 to 6 As shown, this utility model provides a synthesis crucible for silicon carbide powder, including, for example, a crucible assembly 11, a crucible body 12, a cover plate 14, a first thread 15, a handle 16, and a second thread 163. The crucible assembly 11 includes multiple crucible bodies 12 arranged in a ring, forming a hole 13 at the center of the crucible assembly 11. The cover plate 14 is disposed on the crucible assembly 11. The first thread 15 is disposed on the outer wall of the crucible body 12 near the hole 13. The handle 16 allows placement within the hole 13, and the second thread 163 is disposed on the handle 16, matching the first thread 15. In the synthesis crucible provided by this utility model, by providing multiple crucible bodies 12, the heat transfer area of ​​the synthesis crucible can be increased, transferring heat from outside the synthesis crucible to the material contained within the crucible bodies 12. This improves the temperature uniformity of the material within the synthesis crucible, prevents material agglomeration, and reduces the difficulty of removing material from the synthesis crucible. Furthermore, both the first thread 15 and the second thread 163 are located outside the crucible body 12, which can reduce the corrosion of the thread structure by the synthesis process inside the crucible body 12, thereby improving the service life of the synthesis crucible. The synthesis crucible provided by this utility model can be widely used in the synthesis process of various powders. In this embodiment, the synthesis crucible is described for example using the synthesis of silicon carbide powder.

[0036] Please see Figure 1As shown, in one embodiment of this utility model, the crucible assembly 11 is, for example, at least one layer. When the crucible assembly 11 is multi-layered, the multi-layered crucible assemblies 11 are stacked. In this embodiment, the crucible assembly 11 is, for example, four layers. The four-layered crucible assembly 11 includes, for example, a first layer assembly 111, a second layer assembly 112, a third layer assembly 113, and a fourth layer assembly 114. The second layer assembly 112 is disposed on the first layer assembly 111, the third layer assembly 113 is disposed on the side of the second layer assembly 112 away from the first layer assembly 111, and the fourth layer assembly 114 is disposed on the side of the third layer assembly 113 away from the second layer assembly 112. The centers of the four layers of crucible assemblies 11 are on the same straight line. The height of each layer of crucible assembly 11 is, for example, 200mm-300mm.

[0037] Please see Figure 1 , Figures 5 to 6 As shown, in one embodiment of this utility model, each crucible assembly 11 includes multiple crucible bodies 12. The multiple crucible bodies 12 in each crucible assembly 11 are on the same horizontal plane. This application does not limit the specific shape of the crucible bodies 12 and can select them according to actual needs. In this embodiment, each crucible assembly 11 contains, for example, two crucible bodies 12. The two crucible bodies 12 combined together form, for example, a cylinder with a central opening. The outer diameter of the cylinder is, for example, 200mm-400mm, and the thickness is, for example, 10mm-20mm. Specifically, each crucible body 12 includes, for example, a bottom 121 and a side portion 122. The side portion 122 is arranged around the bottom 121, and an opening 123 is provided on the side of the crucible body 12 away from the bottom 121 to facilitate the placement of raw materials into the crucible body 12. The height of the crucible body 12 is, for example, 200mm-300mm.

[0038] Please see Figure 1 , Figures 5 to 6 As shown, in one embodiment of this utility model, during the synthesis of silicon carbide powder, a large amount of raw materials are distributed into each crucible body 12 of the crucible assembly 11. Compared to filling a large amount of raw materials into a single large crucible body 12 at once, in this application, by distributing the raw materials, the heat transfer effect between the raw materials can be improved, allowing heat to be evenly distributed among the raw materials. This improves the quality of the synthesized silicon carbide powder and prevents the raw materials from clumping, reducing the difficulty of removing materials from the crucible body 12.

[0039] Please see Figure 1 , Figures 5 to 6As shown, in one embodiment of this utility model, a protrusion 124 is further provided on the outer wall of the crucible body 12, and the protrusion 124 extends from the bottom 121 in a direction away from the opening 123. The height h of the protrusion 124 is less than the height H of the crucible body 12, and the shape and size of the protrusion 124 projected orthographically into the crucible body 12 are the same as the shape and size of the opening 123. Therefore, when two adjacent crucible assemblies 11 are stacked, the protrusion 124 of the crucible body 12 in the upper layer of the crucible assembly 11 can engage with the opening 123 of the crucible body 12 in the lower layer of the crucible assembly 11, thereby allowing the lower layer of the crucible assembly 11 to stably support the upper layer of the crucible assembly 11.

[0040] Please see Figure 1 , Figures 5 to 6 As shown, in one embodiment of this utility model, for the same layer of crucible assembly 11, the cross-section of the crucible body 12 is, for example, fan-shaped. After multiple crucible bodies 12 are arranged in a ring, a hole 13 is formed in the center of the multiple crucible bodies 12. The hole 13 is, for example, circular, and the crucible bodies 12 of different layers have the same size, thereby forming a hole 13 that sequentially penetrates the fourth layer assembly 114, the third layer assembly 113, the second layer assembly 112, and the first layer assembly 111.

[0041] Please see Figure 1 , Figures 3 to 4 As shown, in one embodiment of this utility model, a cover plate 14 is disposed on the crucible assembly 11. Specifically, in this embodiment, the cover plate 14 is disposed, for example, on the opening 123 of the crucible body 12 in the fourth layer assembly 114. The outer diameter of the cover plate 14 is equal to the outer diameter of the fourth layer assembly 114, so as to seal the fourth layer assembly 114 and prevent impurities outside the synthesis crucible from entering the crucible body 12 and contaminating the material inside the crucible body 12. The diameter of the cover plate 14 is, for example, 200mm-400mm, and the thickness is, for example, 10mm-30mm.

[0042] Please see Figures 1 to 2 As shown, in another embodiment of this utility model, the handle 16 is allowed to be placed inside the hole 13. The material of the handle 16 includes at least one of stainless steel, hard plastic, or graphite. Specifically, the handle 16 includes, for example, a first portion 161 and a second portion 162. The first portion 161 is allowed to be placed inside the hole 13, and the height of the first portion 161 is greater than or equal to the height of one crucible assembly 11. The second portion 162 is arranged perpendicular to the first portion 161, providing a point of leverage for the operator to operate the handle 16.

[0043] Please see Figures 1 to 2As shown, in one embodiment of this utility model, the handle 16 is provided with a second thread 163, which is provided, for example, on the first portion 161. Specifically, in this embodiment, the second thread 163 is provided, for example, around the side wall of the first portion 161 away from the second portion 162.

[0044] Please see Figures 1 to 6 As shown, in one embodiment of this utility model, a first thread 15 is provided on the outer wall of the crucible body 12 near the hole 13. Each crucible body 12 in each crucible assembly 11 is provided with a first thread 15, and the first thread 15 matches a second thread 163. Specifically, the nominal diameters of the first thread 15 and the second thread 163 are equal, for example, 10mm-30mm. By setting the first thread 15 and the second thread 163, the first portion 161 can extend into the hole 13. The second thread 163 sequentially matches the first thread 15 on the outer wall of the crucible body 12 in each crucible assembly 11, thereby fixing the handle 16 sequentially to the crucible body 12 in each crucible assembly 11. By operating the second portion 162, the handle 16 is disengaged from the hole 13, and the crucible body 12 in each crucible assembly 11 can be disengaged along with the handle 16, thereby achieving the purpose of separating two adjacent crucible assemblies 11. This facilitates the separation of each crucible assembly 11 and the crucible body 12 in each crucible assembly 11, and makes it easier to take material from the crucible body 12. The heights of the first thread 15, the second thread 163, and the crucible body 12 are equal, so that when the first portion 161 is inserted into the hole 13, the second thread 163 has sufficient screwing depth, ensuring that there is a sufficiently large preload between the second thread 163 and the first thread 15, so that when the handle 16 drives the crucible body 12 in the upper crucible assembly 11 to detach from the lower crucible assembly 11, the crucible bodies 12 in the upper crucible assembly 11 will not separate.

[0045] Please see Figures 1 to 6 As shown, in one embodiment of this utility model, taking the removal of the crucible body 12 from the fourth layer assembly 114 and the third layer assembly 113 as an example, the function of the handle 16 is described in detail. First, the handle 16 is inserted into the hole 13, and the second thread 163 is matched and fixed with the first thread 15 on the outer wall of the crucible body 12 in the fourth layer assembly 114. Then, the handle 16 is removed from the hole 13, and at the same time, the crucible body 12 in the fourth layer assembly 114 is detached from the third layer assembly 113. Then, the threaded connection between the handle 16 and the fourth layer assembly 114 is disconnected, and the handle 16 is inserted into the hole 13 again, so that the second thread 153 is matched and fixed with the first thread 15 on the outer wall of the crucible body 12 in the third layer assembly 113. Then, the handle 16 is removed from the hole 13, and at the same time, the crucible body 12 in the third layer assembly 113 is detached from the second layer assembly 112.

[0046] Please see Figures 1 to 6 As shown, in one embodiment of this invention, the first thread 15 and the second thread 163 are both located outside the crucible body 12, and the synthesis process inside the crucible body 12 will not corrode the first thread 15 and the second thread 163. Furthermore, the multi-layer crucible assembly 11 is sealed by stacking rather than by threaded connection, which also avoids corrosion of the sealing components by the synthesis process inside the crucible body 12, thereby improving the overall service life of the synthesis crucible, reducing synthesis costs, and increasing the economy and practicality of the synthesis crucible.

[0047] In summary, this invention proposes a synthesis crucible for silicon carbide powder. By distributing the raw materials into the crucible body of each layer of the crucible assembly, the heat distribution among the raw materials can be improved, the agglomeration of raw materials can be alleviated, and the difficulty of material removal from the synthesis crucible can be reduced. Moreover, by placing the first and second threads outside the crucible body, corrosion of the thread structure by the synthesis process inside the crucible can be avoided, thereby increasing the service life of the synthesis crucible and reducing the synthesis cost.

[0048] Throughout this specification, the terms "one embodiment," "an embodiment," or "a specific embodiment" refer to a particular feature, structure, or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0049] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features. It should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application. Except for the technical features described in the specification, the remaining technical features are known to those skilled in the art. To highlight the innovative features of this utility model, the remaining technical features will not be described further here.

Claims

1. A synthesis crucible for silicon carbide powder, characterized by, At least comprising: at least one layer of crucible assembly, each layer of the crucible assembly comprising a plurality of crucible bodies arranged in a ring shape, and after the plurality of crucible bodies are arranged in the ring shape, a hole is formed in the center of the crucible assembly; a cover plate arranged on the crucible assembly; a first thread arranged on the outer wall of the crucible body on the side close to the hole; a handle allowing being placed in the hole; and a second thread arranged on the handle, and the second thread matches the first thread.

2. The synthetic crucible of claim 1, wherein, The crucible body comprises a bottom and a side arranged around the bottom, and an opening is arranged on the side of the crucible body away from the bottom.

3. The synthetic crucible of claim 2, wherein, A protrusion is arranged on the crucible body, and the protrusion extends from the bottom to the direction away from the opening.

4. The synthetic crucible of claim 3, wherein, The shape and size of the orthographic projection of the protrusion in the crucible body are the same as the shape and size of the opening.

5. The synthetic crucible of claim 4, wherein, For two adjacent layers of the crucible assembly, the protrusion of the crucible body in the upper layer of the crucible assembly is clamped with the opening of the crucible body in the lower layer of the crucible assembly.

6. The synthetic crucible of claim 1, wherein, The handle comprises a first part, allowing the first part to be placed in the hole, and the height of the first part is greater than or equal to the height of one layer of the crucible assembly.

7. The synthetic crucible of claim 6, wherein, The handle comprises a second part, and the second part is arranged perpendicularly to the first part.

8. The synthetic crucible of claim 7, wherein, The second thread is arranged on the side wall of the first part away from the second part.

9. The synthetic crucible of claim 1, wherein, The cross section of the crucible body is a fan ring shape, and the hole is a circular shape.

10. The synthetic crucible of claim 1, wherein, When the crucible assembly is multi-layered, the multi-layered crucible assemblies are arranged in a stack, and the centers of the multi-layered crucible assemblies are on the same straight line.

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