Carbon fiber crucible preform

Abstract

The utility model provides a carbon fiber crucible preform, and belongs to the technical field of crucible preforms. The carbon fiber crucible prefabricated body comprises a carbon fiber sheet crucible prefabricated main body. The carbon fiber sheet crucible prefabricated main body is provided with a natural graphite liner, the outer side of the carbon fiber sheet crucible prefabricated main body is detachably connected with a natural graphite shell, and the bottom of the natural graphite shell is provided with a thickened bottom pad. By arranging the natural graphite shell outside the carbon fiber sheet crucible prefabricated main body, the carbon fiber sheet crucible prefabricated main body can be protected during use, and when the carbon fiber sheet crucible prefabricated main body is used at a high temperature, even if the carbon fiber sheet crucible prefabricated main body is broken during use, normal use of the crucible cannot be influenced; therefore, the service life of the crucible is prolonged, and continuous production can be guaranteed.

Description

Technical Field

[0001] The present application relates to the field of crucible preforms, and in particular to a carbon fiber crucible preform. Background Art

[0002] A crucible is a cup-shaped vessel used in laboratories to heat solids at high temperatures. The crucible has good thermal conductivity and high temperature resistance. During high-temperature use, it has a small thermal expansion coefficient, has a certain resistance to strain from rapid heating and cooling, has strong corrosion resistance to acidic and alkaline solutions, and has excellent chemical stability.

[0003] With the increasing application of carbon fiber composite materials, in the process of single crystal pulling, graphite / carbon-carbon crucible is a key core component, which plays a high-temperature bearing role. The graphite / carbon-carbon crucible bears the weight of the quartz crucible and raw materials to ensure that the raw materials will not leak out after the high-temperature quartz crucible softens, and carries the raw materials for rotational motion during the crystal pulling process. Therefore, its mechanical properties are required to be relatively high; when the furnace is stopped in an emergency, the graphite / carbon-carbon crucible will be under great stress in a short period of time; the crucible has low strength and will generally explode and be scrapped in this case.

[0004] For example, the crucible preform disclosed in China Publication No. CN219003119U uses the engagement of the positioning strip and the positioning slot to limit and fix the inner liner, and the cooperation of the knob and the rotating block to quickly fix the inner liner, so that the staff can quickly and conveniently remove it. However, in this solution, since the main body of the crucible preform is formed by needle punching multiple groups of carbon fiber cloth, the carbon fiber cloth is prone to collapse or cracking in a high temperature environment, which can easily cause cracks in the crucible preform, making the crucible unusable. Utility Model Content

[0005] In order to make up for the above shortcomings, the present application provides a carbon fiber crucible preform, which aims to improve the problem that the main body of the crucible preform is formed by needle punching multiple groups of carbon fiber cloths, and the carbon fiber cloths are prone to collapse or cracking in a high temperature environment, which can easily cause cracks in the crucible preform, thereby rendering the crucible unusable.

[0006] The embodiment of the present application provides a carbon fiber crucible preform, including a carbon fiber cloth crucible preform body.

[0007] The carbon fiber cloth crucible prefabricated body is provided with a natural graphite liner, the outer side of the carbon fiber cloth crucible prefabricated body is detachably connected with a natural graphite shell, and the bottom of the natural graphite shell is provided with a thickened bottom pad.

[0008] In a specific embodiment, the carbon fiber cloth crucible prefabricated body is detachably connected to the natural graphite liner.

[0009] In a specific embodiment, a limiting ring plate is fixedly connected to the top of the natural graphite liner, and the limiting ring plate is located directly above the natural graphite shell and contacts the upper end of the natural graphite shell.

[0010] In a specific embodiment, a plurality of blocks are arranged in an annular array on the lower surface of the limiting ring plate, and a slot matching each of the blocks is provided on the top of the natural graphite shell.

[0011] In a specific embodiment, the carbon fiber cloth crucible prefabricated body includes multiple layers of carbon fiber cloth, and each layer of carbon fiber cloth is laid layer by layer.

[0012] In a specific embodiment, during laying, each layer of carbon fiber cloth is arranged in a different manner.

[0013] In a specific embodiment, the intersections between two adjacent layers of carbon fiber cloth are fixed to prevent misalignment between each layer of carbon fiber cloth.

[0014] In a specific embodiment, the thickened base pad is made of natural graphite, and anti-slip protrusions may be added to the bottom of the thickened base pad.

[0015] Beneficial effects:

[0016] 1. By arranging a natural graphite shell on the outside of the carbon fiber cloth crucible prefabricated body, the carbon fiber cloth crucible prefabricated body can be protected during use. When used at high temperature, even if the carbon fiber cloth crucible prefabricated body is broken during use, it will not affect the normal use of the crucible, thereby increasing the service life of the crucible and ensuring continuous production.

[0017] 2. By thickening the bottom pad, the bottom of the natural graphite shell can be thickened, thereby increasing the service life of the entire crucible.

[0018] 3. Through the combination of the carbon fiber cloth crucible prefabricated body and the natural graphite shell, the weight of the entire crucible is reduced without affecting its performance.

[0019] 4. The detachable connection between the carbon fiber cloth crucible prefabricated body and the natural graphite shell makes it easy to clean the natural graphite liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of a carbon fiber crucible preform provided in an embodiment of the present application;

[0022] Figure 2 A cross-sectional view of a carbon fiber crucible preform provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of the prefabricated main structure of a carbon fiber cloth crucible provided in an embodiment of the present application;

[0024] Figure 4 Provided for the implementation of this application Figure 2 Enlarged view of point A in the middle.

[0025] In the figure: 1- natural graphite liner; 2- natural graphite outer shell; 3- carbon fiber cloth crucible prefabricated body; 4- limiting ring plate; 5- thickened bottom pad; 6- clamping block. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0027] See also Figure 1-Figure 4 The present application provides a carbon fiber crucible preform, including a carbon fiber cloth crucible preform body 3.

[0028] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , the carbon fiber cloth crucible prefabricated body 3 is provided with a natural graphite liner 1, the outer side of the carbon fiber cloth crucible prefabricated body 3 is detachably connected with a natural graphite shell 2, and the bottom of the natural graphite shell 2 is provided with a thickened bottom pad 5. Among them, by arranging the natural graphite shell 2 on the outside of the carbon fiber cloth crucible prefabricated body 3, the carbon fiber cloth crucible prefabricated body 3 can be protected when in use. When used at high temperature, even if the carbon fiber cloth crucible prefabricated body 3 is broken during use, it will not affect the normal use of the crucible, thereby improving the service life of the crucible and ensuring the continuous production. Through the detachable connection between the carbon fiber cloth crucible prefabricated body 3 and the natural graphite shell 2, the natural graphite liner 1 can be easily cleaned. By thickening the bottom pad 5, the bottom of the natural graphite shell 2 can be thickened, thereby improving the service life of the entire crucible. Through the cooperation of the carbon fiber cloth crucible prefabricated body 3 and the natural graphite shell 2, the weight of the entire crucible is reduced without affecting its performance.

[0029] In this embodiment, the carbon fiber cloth crucible prefabricated body 3 is detachably connected to the natural graphite inner liner 1. The carbon fiber cloth crucible prefabricated body 3 is detachably connected to the natural graphite inner liner 1. When the carbon fiber cloth crucible prefabricated body 3 is broken or cracked, it can be directly disassembled and replaced.

[0030] In this embodiment, a limiting ring plate 4 is fixedly connected to the top of the natural graphite liner 1, and the limiting ring plate 4 is located directly above the natural graphite shell 2 and contacts the upper end of the natural graphite shell 2. The lower surface of the limiting ring plate 4 is provided with a plurality of blocks 6 in an annular array, and specifically, the blocks 6 are also made of graphite. A card slot matching each block 6 is provided at the top of the natural graphite shell 2. The matching of the blocks 6 and the card slots prevents the natural graphite liner 1 from shaking during use, thereby increasing the stability of the entire crucible.

[0031] In this embodiment, the carbon fiber cloth crucible prefabricated body 3 includes multiple layers of carbon fiber cloth, and each layer of carbon fiber cloth is laid layer by layer. When laying, each layer of carbon fiber cloth is arranged in a different manner. The intersection between two adjacent layers of carbon fiber cloth is fixed to prevent misalignment between each layer of carbon fiber cloth. Among them, a technology combining a stacking yarn laying process and a puncture process is adopted: multiple layers of carbon fiber cloth are laid in different arrangements, and the Z-direction puncture carbon fiber yarn bundle punctures the multiple layers of carbon fiber cloth to form a prefabricated

[0032] The width of the carbon fiber yarn bundle of the carbon fiber cloth is equal to the distance between the puncture steel needles. Under this distance, the problem of the carbon fiber cloth plane thickness being lower than the thickness around the interlacing point due to the squeezing effect of the puncture steel needle is avoided, and the thickness unevenness of the entire puncture preform is avoided; carbon fiber cloth interlayer fixed intersection fixing technology: the intersection between two adjacent layers of carbon fiber cloth is positioned and fixed with glue or polyethylene / carbon fiber blended mesh tire to prevent misalignment between layers; the puncture needle mechanically punctures layer by layer, and the z-direction carbon fiber yarn bundle threading technology is used to accurately position the puncture needle.

[0033] In specific configuration, the thickened bottom pad 5 is made of natural graphite, and an anti-skid protrusion can be added to the bottom of the thickened bottom pad 5. The performance of the thickened bottom pad 5 is consistent with that of the crucible, thereby ensuring the stability of the entire crucible during use.

[0034] The working principle of the carbon fiber crucible preform:

[0035] By providing a natural graphite shell 2 on the outside of the carbon fiber cloth crucible prefabricated body 3, the carbon fiber cloth crucible prefabricated body 3 can be protected during use. When used at high temperatures, even if the carbon fiber cloth crucible prefabricated body 3 is broken during use, it will not affect the normal use of the crucible, thereby increasing the service life of the crucible and ensuring continuous production. The detachable connection between the carbon fiber cloth crucible prefabricated body 3 and the natural graphite shell 2 facilitates the cleaning of the natural graphite liner 1. By thickening the bottom pad 5, the bottom of the natural graphite shell 2 can be thickened, thereby increasing the service life of the entire crucible. By cooperating with the carbon fiber cloth crucible prefabricated body 3 and the natural graphite shell 2, the weight of the entire crucible is reduced without affecting its performance.

[0036] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A carbon fiber crucible preform, characterized in that: include A carbon fiber cloth crucible prefabricated body (3), wherein a natural graphite liner (1) is arranged inside the carbon fiber cloth crucible prefabricated body (3), a natural graphite shell (2) is detachably connected to the outer side of the carbon fiber cloth crucible prefabricated body (3), and a thickened bottom pad (5) is arranged at the bottom of the natural graphite shell (2).

2. The carbon fiber crucible preform according to claim 1, characterized in that: The carbon fiber cloth crucible prefabricated body (3) is detachably connected to the natural graphite liner (1).

3. The carbon fiber crucible preform according to claim 1, characterized in that: A limiting ring plate (4) is fixedly connected to the top of the natural graphite liner (1), and the limiting ring plate (4) is located directly above the natural graphite outer shell (2) and in contact with the upper end of the natural graphite outer shell (2).

4. The carbon fiber crucible preform according to claim 3, characterized in that: The lower surface of the limiting ring plate (4) is provided with a plurality of clamping blocks (6) in a ring array, and the top of the natural graphite shell (2) is provided with a clamping groove matched with each clamping block (6).

5. The carbon fiber crucible preform according to claim 1, characterized in that: The carbon fiber cloth crucible prefabricated body (3) comprises multiple layers of carbon fiber cloth, each layer of carbon fiber cloth being laid layer by layer.

6. The carbon fiber crucible preform according to claim 5, characterized in that: When laying, each layer of carbon fiber cloth is arranged in a different way.

7. The carbon fiber crucible preform according to claim 5, characterized in that: The intersections between two adjacent layers of carbon fiber cloth are fixed to prevent misalignment between each layer of carbon fiber cloth.

8. The carbon fiber crucible preform according to claim 1, characterized in that: The thickened base pad (5) is made of natural graphite, and an anti-slip protrusion can be added to the bottom of the thickened base pad (5).

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