Quartz crucible with reinforced upper opening

Abstract

The utility model relates to the field of crucibles, in particular to a quartz crucible with a reinforced upper opening. Comprising a crucible body, the crucible body is provided with a bubble composite layer located on the outer layer and a bubble depletion layer located on the inner layer, a plurality of inner ribs are arranged on the upper portion of the inner wall of the bubble depletion layer, the inner ribs are arranged in the circumferential face direction of the crucible body in a surrounding mode, and the inner ribs are arranged in the axial length direction of the crucible body at intervals. The crucible has the technical effect that the upper opening part of the crucible is not easy to soften and deform.

Description

Technical Field

[0001] The present application relates to the field of crucibles, and in particular to a quartz crucible with a reinforced upper opening. Background Art

[0002] A quartz crucible is a container made by shaping high-purity quartz sand into a mold and then producing it at high temperature using an electric arc method. It is primarily used in the pulling process of high-purity single-crystal silicon rods for semiconductors and is a key consumable for containing molten silicon liquid. Based on the downstream application scenarios of single-crystal silicon rods, quartz crucibles can be divided into quartz crucibles for semiconductor single-crystal silicon growth (semiconductor quartz crucibles) and quartz crucibles for photovoltaic single-crystal silicon growth (photovoltaic quartz crucibles). The structure of a quartz crucible is generally divided into a bubble-depletion layer and a bubble-composite layer. The bubble-composite layer is usually made of natural quartz sand and contains a large number of evenly distributed bubbles inside. This has an insulating effect and allows the quartz crucible to be heated evenly. The bubble-depletion layer is also made of natural quartz sand and contains no bubbles inside. It is uniformly dense and has the function of isolating the silicon liquid from the bubble layer. However, during the crystal pulling process, the upper part of current quartz crucibles sometimes softens and deforms, affecting crystal pulling and thus requiring improvement. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a quartz crucible with a reinforced upper opening, which can solve the technical problem that the upper opening of the crucible is prone to softening and deformation.

[0004] The embodiment of the present application provides a quartz crucible with a reinforced top, which adopts the following technical solution:

[0005] A quartz crucible with a reinforced top includes a crucible body, wherein the crucible body is provided with a bubble composite layer located on the outer layer and a bubble depletion layer located on the inner layer, wherein a plurality of inner ribs are provided on the upper portion of the inner wall of the bubble depletion layer, wherein the inner ribs are arranged around the circumference of the crucible body, and the plurality of inner ribs are arranged at intervals along the axial length direction of the crucible body.

[0006] Furthermore, the number of the inner ribs is three.

[0007] Furthermore, a barium carbonate coating is provided on the inner wall of the bubble-depleted layer and the inner ribs.

[0008] Furthermore, the thickness of the barium carbonate coating ranges from 0.1 to 0.3 mm.

[0009] Furthermore, the cross section of the inner rib is arranged in an arc shape.

[0010] Furthermore, a plurality of stress grooves are circumferentially spaced apart on the inner rib.

[0011] Furthermore, a plurality of external ribs are provided on the upper portion of the outer wall of the bubble-depleted layer, and the external ribs are embedded in the bubble composite layer.

[0012] Furthermore, the thickness of the bubble composite layer is in the range of 10-20 mm, and the thickness of the bubble depletion layer is in the range of 15-25 mm.

[0013] Beneficial effects of the utility model:

[0014] When the crucible provided by the utility model is used for crystal pulling, the inner ribs at the upper opening of the crucible can enhance the structural strength of the upper opening of the crucible main body, so that the upper opening of the crucible main body is not easily deformed, thereby ensuring smooth crystal pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 A top view of an embodiment of the present invention;

[0018] Figure 3 A cross-sectional schematic diagram of an embodiment of the present utility model;

[0019] The reference numerals are: 1, crucible body; 2, bubble composite layer; 3, bubble depletion layer; 31, inner rib; 311, stress groove; 32, outer rib; DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0026] The present application discloses a quartz crucible with a reinforced top. Figure 1-3 , including a crucible body 1, which is cylindrical, with one end open and the other end in an arc shape. The crucible body 1 is provided with a bubble composite layer 2 located on the outer layer and a bubble-depleted layer 3 located on the inner layer. The bubble composite layer 2 contains a large number of uniform and dense bubbles, and the bubble-depleted layer 3 is transparent and does not contain bubbles. Both the bubble composite layer 2 and the bubble-depleted layer 3 are made of quartz. The thickness of the bubble composite layer 2 ranges from 10 to 20 mm, and the thickness of the bubble-depleted layer 3 ranges from 15 to 25 mm. In this embodiment, there are no specific requirements for the thickness of the bubble composite layer 2 and the bubble-depleted layer 3, and the thickness can be selected according to actual needs. The bubble composite layer 2 within this thickness range has a better thermal insulation effect and is heated evenly, and the bubble-depleted layer 3 has a longer life.

[0027] At the same time, a plurality of internal ribs 31 are provided on the upper portion of the inner wall of the bubble-depleted layer 3. The internal ribs 31 are integrally formed with the bubble-depleted layer 3. The internal ribs 31 are arranged around the circumference of the crucible body 1, and the plurality of internal ribs 31 are arranged at intervals along the axial length direction of the crucible body 1. In this embodiment, the number of internal ribs 31 is preferably three, and the number can be increased or decreased according to actual needs and is not limited to three. The internal ribs 31 can enhance the structural strength of the upper opening of the crucible body 1, making the upper opening of the crucible body 1 less prone to deformation. At the same time, the cross-section of the internal ribs 31 is arranged in an arc shape, and such an arrangement makes the rib transition smoother. At the same time, a plurality of stress grooves 311 are spaced circumferentially on the internal ribs 31. During the heating process of the crucible body 1, the stress grooves 311 can release part of the stress, making the upper opening of the crucible body 1 less prone to deformation. In addition, a plurality of external ribs 32 are integrally formed on the upper portion of the outer wall of the bubble-depleted layer 3 , and the external ribs 32 are embedded in the bubble composite layer 2 . The external ribs 32 can further enhance the structural strength of the upper opening of the crucible body 1 .

[0028] In addition, a barium carbonate coating is provided on the inner wall of the bubble-depleted layer 3 and the inner ribs 31. When the quartz crucible is heated, the barium carbonate decomposes to form barium oxide, which reacts with the quartz crucible to form barium silicate. This coating increases the strength of the quartz crucible and reduces its softening at high temperatures. Furthermore, the barium carbonate coating promotes crystallization of the inner layer of the quartz crucible, reduces erosion of the crucible surface by silicon melt, and increases the service life of the quartz crucible. The thickness of the barium carbonate coating ranges from 0.1 to 0.3 mm. In this embodiment, there is no specific requirement for the thickness of the barium carbonate coating; the thickness can be selected based on actual needs.

[0029] The implementation principle of the quartz crucible with a reinforced upper opening in the embodiment of the present application is as follows: when pulling crystals from the crucible, the internal ribs 31 at the upper opening of the crucible can enhance the structural strength of the upper opening of the crucible body 1, making the upper opening of the crucible body 1 less prone to deformation, thereby ensuring the smooth progress of the crystal pulling work.

[0030] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A quartz crucible with a reinforced top, characterized by: The crucible comprises a crucible body, wherein the crucible body is provided with a bubble composite layer located on the outer layer and a bubble depletion layer located on the inner layer, a plurality of inner ribs are provided on the upper part of the inner wall of the bubble depletion layer, the inner ribs are arranged around the circumference of the crucible body, and the plurality of inner ribs are arranged at intervals along the axial length direction of the crucible body.

2. A quartz crucible with a reinforced top according to claim 1, characterized in that: The inner ribs are provided in three numbers.

3. The quartz crucible with a reinforced top according to claim 1, characterized in that: The inner wall of the bubble-depleted layer and the inner ribs are both provided with a barium carbonate coating.

4. A quartz crucible with a reinforced top according to claim 3, characterized in that: The thickness of the barium carbonate coating ranges from 0.1 to 0.3 mm.

5. The quartz crucible with a reinforced top according to claim 1, characterized in that: The cross section of the inner rib is arranged in an arc shape.

6. The quartz crucible with a reinforced top according to claim 1, characterized in that: A plurality of stress grooves are arranged at intervals in the circumferential direction on the inner rib.

7. The quartz crucible with a reinforced top according to claim 1, characterized in that: A plurality of external ribs are provided on the upper portion of the outer wall of the bubble-depleted layer, and the external ribs are embedded in the bubble composite layer.

8. The quartz crucible with a reinforced top according to claim 1, characterized in that: The thickness of the bubble composite layer is in the range of 10-20 mm, and the thickness of the bubble depletion layer is in the range of 15-25 mm.

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