A new quartz crucible

Abstract

The present application relates to a new type of quartz crucible, comprising a crucible heating part and a crucible clamping part, the top end of the crucible heating part is connected with the crucible clamping part, the crucible heating part and the crucible clamping part are integrally formed, and the quartz crucible is concave at the top end and is provided with a containing groove. By designing the slope gradient of the bottom of the clamping side groove to be smaller than the slope gradient of the top of the clamping side groove, the crucible tongs can better extend into the clamping side groove, the clamping is stable, and the crucible tongs can be easily separated from the clamping side groove.

Description

Technical Field

[0001] This invention belongs to the field of quartz crucibles, specifically a novel quartz crucible. Background Technology

[0002] With the rapid development of the photovoltaic industry, the thermal field of our company and other bases is increasing, and the specifications and dimensions of our products are also being upgraded. The requirements for the production capacity, cost and quality of monocrystalline silicon rods are also getting higher and higher. In the process of monocrystalline manufacturing, quartz crucibles are one of the necessary auxiliary materials, and their usage cost accounts for a large part of the cost. At the same time, the oxygen content of the crystal is largely affected by the crucible. With a series of cost and quality requirements, improving the service life of the crucible and reducing its usage cost is one of the key improvement items at present.

[0003] Existing patent, patent number 202322682973.5, entitled "A Quartz Crucible," features "an annular groove on the outer circumferential surface of the crucible body, with the crucible clamp located within the annular groove. During handling, the annular groove and the crucible clamp form a supporting force, making it easier for operators to handle the crucible and preventing separation of the crucible from the crucible clamp during handling." However, it also has some shortcomings, such as inconsistent wall thickness in the bottom heated area, which may even be greater than the thickness of the clamped part, easily leading to uneven heating and affecting fine processing. This results in an unclear depth of the annular groove. If it is consistent as shown in the figure, the depth of the annular groove is too deep, which can easily damage the original structure of the crucible and reduce its structural strength. Therefore, a new type of quartz crucible is proposed. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] Given the following technical problems in the prior art: the wall thickness of the bottom heating area of ​​the crucible described in the prior patent is inconsistent, and may even be greater than the thickness of the clamped part, which can easily lead to uneven heating, affect fine processing, and result in unclear depth of the annular groove. If it is consistent as shown in the figure, the depth of the annular groove is too deep, which can easily damage the original structure of the crucible and reduce the structural strength.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a novel quartz crucible, comprising a crucible heating part and a crucible clamping part, wherein the top end of the crucible heating part is connected to the crucible clamping part, the crucible heating part and the crucible clamping part are integrally formed, and the quartz crucible has a receiving groove recessed from the top end;

[0007] A clamping side groove is recessed on each side of the crucible clamping part, and the slope of the bottom of the clamping side groove is smaller than the slope of the top of the clamping side groove.

[0008] The liquid outlet is connected to the top of the receiving tank. The liquid outlet has a triangular cross-section. The thickness of the vertical wall of the heated part of the crucible is uniform and consistent. The thickness of the vertical wall of the crucible clamping part gradually increases from the bottom to the top.

[0009] As a preferred technical solution for a novel quartz crucible, the length of the clamping side groove is z, and the length of z is 1 / 4 to 1 / 3 of the maximum outer diameter of the heated part of the crucible;

[0010] The selection of the position and length of the clamping side groove not only facilitates positioning and clamping, but also reduces damage to the crucible's strength.

[0011] As a preferred technical solution for a novel quartz crucible, the auxiliary line is the extension line of the outer wall of the heated part of the crucible, and the curvature of the auxiliary line is consistent with the curvature of the outer periphery of the heated part of the crucible. The distance from the point closest to the inner wall of the receiving groove to the inner wall of the receiving groove is x, and the average thickness of the heated part of the crucible is y. The relationship between x and y is: x≥y.

[0012] The relationship between x and y ensures the structural strength of the quartz crucible.

[0013] The beneficial effects of the novel quartz crucible of the present invention are as follows: by designing the slope of the bottom of the clamping side groove to be less than the slope of the top of the clamping side groove, the crucible clamp can better extend into the clamping side groove, clamp firmly, and easily detach from the clamping side groove.

[0014] The position and size of the clamping side grooves also facilitate positioning and clamping, and reduce damage to the crucible's strength;

[0015] The uniform and consistent thickness of the vertical wall of the heated part of the crucible, with the thickness of the vertical wall of the crucible clamping part gradually increasing from the bottom to the top, makes the heated part of the crucible more uniformly heated, thus meeting the requirements of precision processing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0017] Figure 1 This is a cross-sectional view of the front of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the side of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure from one side of the present invention;

[0020] Figure 4 For the present invention Figure 2 A magnified schematic diagram of part A in the middle section;

[0021] Figure 5 For the present invention Figure 2 A magnified schematic diagram of part B in the middle section.

[0022] Reference numerals: 1. Heated part of the crucible; 2. Crucible clamping part; 3. Dispensing nozzle; 4. Clamping side groove; 5. Auxiliary line. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0026] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0027] like Figures 1-5 As shown, the present invention proposes a novel quartz crucible, including a crucible heating part 1 and a crucible clamping part 2. The top end of the crucible heating part 1 is connected to the crucible clamping part 2. The crucible heating part 1 and the crucible clamping part 2 are integrally formed. The quartz crucible has a receiving groove recessed from the top end.

[0028] A clamping side groove 4 is recessed on each side of the crucible clamping part 2, and the slope of the bottom of the clamping side groove 4 is smaller than the slope of the top of the clamping side groove 4.

[0029] The liquid outlet 3 is connected to the top of the receiving tank. The liquid outlet 3 has a triangular cross-section. The thickness of the vertical wall of the heated part 1 of the crucible is uniform and consistent. The thickness of the vertical wall of the crucible clamping part 2 gradually increases from the bottom to the top.

[0030] The length of the clamping side groove 4 is z, and the length of z is 1 / 4 to 1 / 3 of the maximum outer diameter of the heated part 1 of the crucible.

[0031] The selection of the position and length of the clamping side groove 4 not only facilitates positioning and clamping, but also reduces damage to the crucible's strength.

[0032] Auxiliary line 5 is an extension line of the outer wall of the heated part 1 of the crucible. The curvature of auxiliary line 5 is consistent with the curvature of the outer periphery of the heated part 1 of the crucible. The distance from the point closest to the inner wall of the receiving groove 4 to the inner wall of the receiving groove is x. The average thickness of the heated part 1 of the crucible is y. The relationship between x and y is: x≥y.

[0033] The relationship between x and y ensures the structural strength of the quartz crucible.

[0034] The connection between the heated part 1 and the clamping part 2 of the crucible is smooth.

[0035] Crucible material selection:

[0036] 1. Structural Innovation

[0037] Integrated bubble-free structure: using quartz with a purity >99.99% and visible light transmittance ≥90% (400-800nm);

[0038] Gradient density design: bottom density > sidewall density;

[0039] Nanoscale surface treatment: surface roughness control with Ra≤0.1μm.

[0040] 2. Selection of preparation process:

[0041] Improved Arc Melting Method: Staged Pressure Control;

[0042] Doping process: SiCl4 vapor deposition doping (content controlled at 70-200ppm);

[0043] Directional crystallization technology: Inducing bottom α-quartz crystallization (crystallization degree > 85%) through seed crystals.

[0044] Its technical effects are as follows:

[0045] 1. An integrated fused structure made of synthetic quartz sand, with SiO2 purity ≥ 99.995%;

[0046] 2. Average transmittance in the visible light band ≥ 90% (measured at a thickness of 5mm);

[0047] 3. It has an axial density gradient, with the bottom density being 10 to 15% higher than that of the sidewalls;

[0048] 4. Usage time is increased by 35% to 50% compared to the conventional method.

[0049] The specific implementation method is as follows: Open the crucible tongs, with each side of the crucible tongs facing a clamping side groove 4. Close the crucible tongs and let them fit into the clamping side groove 4. This can serve as a force point to make the clamping more stable and prevent the crucible from falling off during movement.

[0050] The position and size of the clamping side groove 4 facilitate positioning and clamping, reduce damage to the crucible's strength, and after clamping, the liquid outlet 3 is located on the side of the symmetrical line of the two clamping clamps of the crucible clamp, making it easy to pour out the liquid.

[0051] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A novel quartz crucible, characterized in that: It includes a crucible heating part (1), a crucible clamping part (2) and a liquid outlet (3). The top of the crucible heating part (1) is connected to the crucible clamping part (2). The crucible heating part (1) and the crucible clamping part (2) are integrally formed. The quartz crucible has a receiving groove recessed from the top. The crucible clamping part (2) has a clamping side groove (4) recessed on both sides, and the slope of the bottom of the clamping side groove (4) is smaller than the slope of the top of the clamping side groove (4). The liquid outlet (3) is connected to the top of the receiving tank. The liquid outlet (3) has a triangular cross-section. The thickness of the vertical wall of the heated part (1) of the crucible is uniform and consistent. The thickness of the vertical wall of the crucible clamping part (2) gradually increases from the bottom to the top.

2. The novel quartz crucible according to claim 1, characterized in that: The length of the clamping side groove (4) is z, and the length of z is 1 / 4 to 1 / 3 of the maximum outer diameter of the heated part (1) of the crucible.

3. The novel quartz crucible according to claim 1, characterized in that: The auxiliary line (5) is the extension line of the outer wall of the heated part (1) of the crucible. The curvature of the auxiliary line (5) is consistent with the curvature of the outer periphery of the heated part (1) of the crucible. The distance from the point closest to the inner wall of the receiving tank of the clamping side groove (4) to the inner wall of the receiving tank is x. The average thickness of the heated part (1) of the crucible is y. The relationship between x and y is: x≥y.

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