Quartz crucible for large-size single crystal

Abstract

The quartz crucible comprises a quartz crucible body and a pouring opening formed in the front end of the top of the quartz crucible body, the pouring opening is sunken downwards in the top end of the quartz crucible body, a flow guide nozzle is arranged at the front end of the pouring opening, the flow guide nozzle is fixed to the outer wall of the front end of the quartz crucible body, and the pouring opening is communicated with the flow guide nozzle. According to the quartz crucible for the large-size single crystal, the novel dross rapid removing device is additionally arranged at the top end of the quartz crucible for the large-size single crystal, after a silicon material or other materials in the quartz crucible are molten, dross can exist on the surface of the molten material, and at the moment, the dross rapid removing device can be used for rapidly removing the dross floating on the surface of the molten material; in this way, it can be guaranteed that molten materials are cleaner during use, after the quick scum removing device is placed at the top end of the quartz crucible body, scum can be removed at a time only by rotating the quick scum removing device, and therefore the scum removing efficiency can be improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of quartz crucibles, specifically relating to a quartz crucible for large-size single crystals. Background Technology

[0002] Large-size single-crystal quartz crucibles are key equipment in modern semiconductor and high-tech materials manufacturing, primarily used for handling molten materials during high-temperature melting and crystal growth. With the rapid development of electronic information technology, the photovoltaic industry, and high-end manufacturing, the demand for high-quality single-crystal materials is constantly increasing, placing higher demands on the performance of quartz crucibles. Traditional quartz crucibles may face problems such as molten material contamination, uneven thermal expansion, and insufficient durability at high temperatures, thus requiring continuous innovation and improvement.

[0003] The design and material selection of large-size quartz crucibles are increasingly moving towards multi-layered composite structures to improve their performance under extreme conditions. For example, bubble composite layers provide excellent thermal insulation, reducing heat loss and thermal stress on the crucible; vacuum transparent layers enhance high-temperature resistance while maintaining good optical transparency for easy observation of the melting process; and inner wall coatings improve the crucible's resistance to molten material corrosion and reduce impurity formation. These technological advancements enable large-size single-crystal quartz crucibles to perform better in ensuring material purity, improving production efficiency, and extending service life.

[0004] However, quartz crucibles used for large-size single crystals are mainly used for melting and processing related materials. When silicon or other materials are put into the quartz crucible, the materials inside the quartz crucible are melted by heating. After the silicon or other materials melt, impurities will form scum, which will float on the surface of the molten material. In order to ensure the cleanliness of the molten material, the scum on the surface of the molten material needs to be removed. The scum removal is mainly done by using a metal spoon to pick it out little by little. This not only wastes a lot of time, but also makes it easy to cause the scum to be not removed thoroughly, which will affect the type of molten material. Utility Model Content

[0005] The purpose of this invention is to provide a large-size quartz crucible for single crystals, in order to solve the problem mentioned in the background art that impurities form scum after the silicon material or other materials are melted. The scum floats on the surface of the molten material. In order to ensure the cleanliness of the molten material, it is necessary to remove the scum from the surface of the molten material. The scum removal is mainly done by using a metal spoon to pick it out little by little. This not only wastes a lot of time, but also easily causes the scum to be not completely removed.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a large-size single crystal quartz crucible, comprising a quartz crucible body and a pouring port disposed at the front end of the top of the quartz crucible body, the pouring port being recessed downward inside the top of the quartz crucible body, a guide nozzle being disposed at the front end of the pouring port, the guide nozzle being fixed to the outer wall of the front end of the quartz crucible body, and a scum rapid removal device being placed at the top of the quartz crucible body;

[0007] The rapid scum removal device includes a support frame, a movable hole, an operating head, and a vertical rod. The support frame is placed on the top of the quartz crucible body. A movable hole is provided inside the center of the support frame, and a vertical rod is inserted into the movable hole. An operating head is provided at the top of the vertical rod.

[0008] Preferably, the operating head can drive the upright rod to move up and down and rotate clockwise and counterclockwise in the movable hole, and the length of the mounting bracket is greater than the internal diameter of the quartz crucible body.

[0009] Preferably, the rapid scum removal device further includes an L-shaped scum plate A, an L-shaped scum plate B, and through holes. The left and right ends of the bottom of the upright are respectively connected to the L-shaped scum plate A and the L-shaped scum plate B. The L-shaped scum plate A and the L-shaped scum plate B are fixedly connected by welding, and the L-shaped openings of the L-shaped scum plate A and the L-shaped scum plate B are in opposite directions. The interior of the L-shaped scum plate A and the L-shaped scum plate B is densely covered with through holes.

[0010] Preferably, an arc-shaped fixing plate is provided on the upper side of the center of both ends of the quartz crucible body, and the bottom end of the quartz crucible body is set as a hemisphere.

[0011] Preferably, the quartz crucible body is composed of a bubble composite layer, a vacuum transparent layer, and a coating layer. The bubble composite layer is disposed on the outside of the vacuum transparent layer, and the coating layer is disposed on the inner wall of the vacuum transparent layer.

[0012] Preferably, the bubble composite layer is the outer layer of the quartz crucible body, and the coating is the inner layer of the quartz crucible body.

[0013] Compared with the prior art, this utility model provides a large-size quartz crucible for single crystals, which has the following advantages:

[0014] This invention adds a novel rapid slag removal device to the top of a large-size single-crystal quartz crucible. When silicon or other materials inside the quartz crucible are melted, slag will appear on the surface of the molten material. The rapid slag removal device can then be used to quickly remove the slag floating on the surface of the molten material, ensuring that the molten material is cleaner during use. After the rapid slag removal device is placed on top of the quartz crucible body, simply rotating the device will remove the slag in one go. This increases the efficiency of slag removal and makes the slag on the surface of the molten material more thorough. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a large-size single-crystal quartz crucible according to the present invention.

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the quartz crucible body of this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the scum removal device of this utility model.

[0018] In the diagram: 1. Quartz crucible body; 2. Pour spout; 3. Guide nozzle; 4. Rapid scum removal device; 5. Arc-shaped fixing plate; 6. Bubble composite layer; 7. Vacuum transparent layer; 8. Coating; 9. L-shaped scum plate A; 10. Mounting bracket; 11. Movable hole; 12. Operating head; 13. Vertical rod; 14. L-shaped scum plate B; 15. Through hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model provides, for example Figure 1-3The large-size single-crystal quartz crucible shown includes a quartz crucible body 1 and a pouring spout 2 located at the front end of the top of the quartz crucible body 1. The pouring spout 2 is recessed downwards inside the top of the quartz crucible body 1. The downward-recessed design of the pouring spout 2 helps to better control the flow direction of the molten material. A guide nozzle 3 is provided at the front end of the pouring spout 2 and is fixed to the outer wall of the front end of the quartz crucible body 1. The guide nozzle 3 can accurately guide the flow path of the molten material, ensuring uniform flow and stability of the molten material, and reducing interference to the crucible during melting and sampling. Arc-shaped fixing plates 5 are provided on the upper side of the center of both ends of the quartz crucible body 1. The arc-shaped fixing plates 5 enhance the stability and deformation resistance of the crucible. At high temperatures, the arc design can distribute thermal stress more evenly, improving the durability and safety of the crucible. The bottom end of the quartz crucible body 1 is set as a hemispherical shape. The bottom of the quartz crucible body 1 adopts a hemispherical design. This shape helps to reduce the accumulation of molten material, optimize heating uniformity, and facilitate the complete removal of the material. The quartz crucible body 1 is composed of a bubble composite layer 6, a vacuum transparent layer 7, and a coating layer 8. The bubble composite layer 6 is set on the outside of the vacuum transparent layer 7, and the coating layer 8 is set on the inner wall of the vacuum transparent layer 7. The vacuum transparent layer 7 is located inside the bubble composite layer 6, providing high transparency and good thermal insulation, effectively withstanding high temperatures and reducing heat conduction. The bubble composite layer 6 is the outer layer of the quartz crucible body 1. The bubble composite layer 6 is located on the outer layer of the quartz crucible body 1. This layer design helps to isolate external heat sources, improve thermal insulation performance, reduce heat loss, and improve energy efficiency. The coating layer 8 is the inner layer of the quartz crucible body 1. As the inner layer of the quartz crucible body 1, the coating layer 8 increases the resistance to corrosion of the molten material, reduces the reaction between the material and the crucible surface, and improves the service life of the crucible and the purity of the molten material.

[0021] like Figure 1 and Figure 3As shown, a rapid scum removal device 4 is placed at the top of the quartz crucible body 1. The rapid scum removal device 4 includes a mounting bracket 10, a movable hole 11, an operating head 12, and a vertical rod 13. The mounting bracket 10 is placed at the top of the quartz crucible body 1. A movable hole 11 is provided inside the center of the mounting bracket 10. The vertical rod 13 is inserted into the movable hole 11. The operating head 12 is provided at the top of the vertical rod 13. The operating head 12 can drive the vertical rod 13 to move up and down and rotate clockwise and counterclockwise in the movable hole 11. The length of the mounting bracket 10 is greater than the internal diameter of the quartz crucible body 1. The rapid scum removal device 4 also includes an L-shaped scum plate A9, an L-shaped scum plate B14, and through holes 15. The left and right ends of the bottom of the upright 13 are respectively connected to the L-shaped scum plate A9 and the L-shaped scum plate B14. The L-shaped scum plate A9 and the L-shaped scum plate B14 are fixedly connected by welding, and the L-shaped openings of the L-shaped scum plate A9 and the L-shaped scum plate B14 are in opposite directions. Both the L-shaped scum plate A9 and the L-shaped scum plate B14 are densely covered with through holes 15. When the quartz crucible body 1 melts the silicon material or other materials inside, the impurities and scum contained in the material will be removed. Floating on the surface of the molten material, the scum needs to be removed using the rapid scum removal device 4. Specifically, the operating head 12 needs to be held and lifted, and then the placement bracket 10 is placed on top of the quartz crucible body 1. Then, the upright rod 13 is lowered through the operating head 12. The upright rod 13 moves downward through the movable hole 11, causing the L-shaped scum plates A9 and B14 at the bottom to descend and insert into the molten material. Then, the L-shaped scum plates A9 and B14 need to be rotated through the upright rod 13. When the L-shaped scum plate B14 rotates, it will collect the scum floating on the surface of the molten material. The molten material can pass through the through holes 15 inside the L-shaped scum plate A9 and L-shaped scum plate B14 normally to increase the scum collection effect. After rotating once, the scum will be collected on the L-shaped scum plate A9 and L-shaped scum plate B14. Then, pull the upright 13 upward. When the L-shaped scum plate A9 and L-shaped scum plate B14 are blocked at the bottom of the mounting bracket 10, the scum quick removal device 4 can be taken out directly and the collected scum can be poured out.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A large-size single crystal quartz crucible, comprising a quartz crucible body (1) and a pouring port (2) disposed at the front end of the top of the quartz crucible body (1), wherein the pouring port (2) is recessed downward inside the top of the quartz crucible body (1), and a guide nozzle (3) is disposed at the front end of the pouring port (2), the guide nozzle (3) being fixed to the outer wall of the front end of the quartz crucible body (1), characterized in that: A rapid scum removal device (4) is placed at the top of the quartz crucible body (1); The rapid scum removal device (4) includes a mounting bracket (10), a movable hole (11), an operating head (12), and a vertical rod (13). The mounting bracket (10) is placed at the top of the quartz crucible body (1). The mounting bracket (10) has a movable hole (11) at its center. The vertical rod (13) is inserted into the movable hole (11). The operating head (12) is located at the top of the vertical rod (13). The operating head (12) can drive the vertical rod (13) to move up and down and rotate clockwise and counterclockwise in the movable hole (11). The length of the mounting bracket (10) is greater than the internal diameter of the quartz crucible body (1). It also includes L-shaped scum plate A (9), L-shaped scum plate B (14) and through holes (15). The bottom left and right ends of the upright (13) are respectively connected to L-shaped scum plate A (9) and L-shaped scum plate B (14). The L-shaped scum plate A (9) and L-shaped scum plate B (14) are fixedly connected by welding. The L-shaped openings of L-shaped scum plate A (9) and L-shaped scum plate B (14) are opposite in direction. The interior of L-shaped scum plate A (9) and L-shaped scum plate B (14) is densely covered with through holes (15). Arc-shaped fixing plates (5) are provided on the upper side of the center of the left and right ends of the quartz crucible body (1). The bottom end of the quartz crucible body (1) is set as a hemisphere.

2. The quartz crucible for large-size single crystals according to claim 1, characterized in that: The quartz crucible body (1) is composed of a bubble composite layer (6), a vacuum transparent layer (7) and a coating layer (8). The vacuum transparent layer (7) is provided with a bubble composite layer (6) on the outside and a coating layer (8) on the inner wall of the vacuum transparent layer (7).

3. The quartz crucible for large-size single crystals according to claim 2, characterized in that: The bubble composite layer (6) is the outer layer of the quartz crucible body (1), and the coating layer (8) is the inner layer of the quartz crucible body (1).

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