CN213652722U

CN213652722U - Carbon-carbon composite material crucible

Info

Publication number: CN213652722U
Application number: CN202022523966.7U
Authority: CN
Inventors: 逯雨海; 徐相生; 吕传胜; 钱武中
Original assignee: Hangzhou Zhuodao New Material Co ltd
Current assignee: Hangzhou Zhuodao New Material Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-07-09
Anticipated expiration: 2030-11-03

Abstract

The utility model relates to the technical field of crucibles, in particular to a carbon-carbon composite crucible which is characterized by comprising a crucible body and a net rack, wherein the crucible body is made of carbon-carbon composite materials, a plurality of first grooves are uniformly formed in the inner wall of the crucible body, and the first grooves all extend downwards along the inner wall of the crucible body and are gathered at the bottom of the crucible body to form a net-shaped structure; the net rack is matched with the first grooves, and the net rack can be just embedded into the first grooves in a net structure. The crucible body is made of carbon-carbon composite materials, and has the advantages of light weight, high strength, high temperature resistance, better wear resistance and stronger practicability; through offer first recess and with the rack cooperation in this crucible, before putting quartz crucible at this crucible body, in the first recess of rack embedding in this crucible earlier, like this after heating quartz crucible, upwards promote the rack, can follow this internal taking out of carbon-carbon composite crucible with quartz crucible, the operation is very simple, convenient.

Description

Carbon-carbon composite material crucible

Technical Field

The utility model relates to a crucible technical field especially relates to a charcoal carbon combined material crucible.

Background

The carbon-carbon composite material is one of the advanced composite materials widely used at present, is a composite material formed by reinforcing a carbon matrix by carbon fibers or various carbon fabrics, and has the excellent performances of low density, high strength, wear resistance, high temperature resistance, small thermal expansion coefficient and the like. The material is prepared by compounding a mesh tire and a mesh tire made of carbon fibers, or carbon cloth and carbon cloth, or the mesh tire and the carbon cloth into a carbon fiber preform by alternately laminating and needling, then putting the preform into a chemical vapor reaction furnace, and carrying out chemical vapor densification on the preform by utilizing pyrolytic carbon generated by pyrolysis of carbon source gas at high temperature so as to gradually increase the density of the carbon fiber preform to obtain the carbon/carbon composite material. The material becomes one of important basic materials in the fields of aerospace, metallurgy, new energy and the like, and is an ideal substitute for graphite products and heat-resistant steel.

At present, when a single crystal furnace pulls a single crystal silicon rod, a quartz crucible containing raw materials such as polycrystalline silicon blocks and the like is put into a crucible positioned above a crucible support. During the process of pulling the silicon single crystal rod, the temperature in the furnace is as high as about 1500 ℃, and at the moment, the quartz crucible becomes soft and needs to be supported by an outer crucible. When the crucible is a graphite crucible, the graphite crucible is used in a high-temperature environment due to poor mechanical properties, needs to support the weight of the quartz crucible and raw materials, is in a rotating state, and is easy to break under the action of external force. Therefore, the graphite crucible for the single crystal furnace is generally of a multi-petal structure at present, and even if the graphite crucible is of the multi-petal structure, the service life of the graphite crucible is very short, so that the normal production of enterprises is influenced, and the production cost of the enterprises is increased. In addition, the graphite crucible has more production and processing consumables, and is difficult to meet the requirements of monocrystalline silicon production and development.

In recent years, carbon/carbon composite material crucibles have been used in the production of single crystal silicon rods drawn in single crystal furnaces instead of graphite crucibles. For example, patent No. 200720064249.4 entitled crucible support for single crystal furnace discloses a carbon/carbon composite crucible for pulling a single crystal silicon rod in a single crystal furnace, which can be of an integral or multi-petal structure or a split structure. Further, as disclosed in the utility model publication No. CN203007154U, a composite crucible is disclosed, which comprises a crucible body, and is characterized in that the crucible body is made of carbon/silicon carbide composite material. The crucible body comprises bowl-shaped tray and drum upper and lower two parts, is equipped with the dress lewis hole on the drum. And a through hole which can be plugged is drilled on the crucible body.

However, since the quartz crucible is a disposable tool and must be replaced from furnace to furnace, the quartz crucible left after crystal pulling is usually tightly attached to the inner wall of the carbon/carbon composite crucible, and when the carbon/carbon composite crucible is of an integral structure, the quartz crucible is difficult to remove, and even the carbon/carbon composite crucible is damaged during removal. Although the multi-petal structure can solve the problem of removing quartz crucible residues, the multi-petal structure destroys the roundness of the carbon/carbon composite material crucible, influences the stability of a crystal pulling environment, and influences the whole rod rate and the crystal forming rate. And the upper and lower split structure, especially the carbon-carbon crucible structure of the lower half section, can not be conveniently separated from the quartz crucible.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a carbon-carbon composite crucible.

In order to achieve the above object, the utility model provides a following technical scheme: a carbon-carbon composite crucible comprises a crucible body and a net rack, wherein the crucible body is made of carbon-carbon composite materials, a plurality of first grooves are uniformly formed in the inner wall of the crucible body, and the first grooves extend downwards along the inner wall of the crucible body and are converged at the bottom of the crucible body to form a net structure; the net rack is matched with the first grooves, the net rack can be just embedded into the first grooves in a net structure, and the head of the net rack extends out of the top ends of the first grooves.

Preferably, the crucible body is formed by assembling a bowl-shaped tray at the lower part and a cylinder at the upper part.

Preferably, the inner wall of the top end of the bowl-shaped tray and the inner wall of the bottom end of the cylinder are both circumferentially provided with second grooves, and the sections of the second grooves are L-shaped; the rack includes lower part rack, upper portion rack and is used for connecting the annular rack of upper portion rack and lower part rack, the annular rack with second recess looks adaptation, the lower part rack with first recess looks adaptation on the bowl form tray, the upper portion rack with first recess looks adaptation on the drum.

Preferably, the top end of the bowl-shaped tray is in an inner cone shape, and the bottom end of the cylinder is in an outer cone shape matched with the inner cone shape.

Preferably, the net rack is made of high-temperature-resistant materials.

The utility model has the advantages that: the crucible body is made of carbon-carbon composite materials, and has the advantages of low density, light weight, high strength, high temperature resistance, better wear resistance and stronger practicability; through offering first recess and cooperating with the rack in the carbon-carbon composite material crucible, before putting quartz crucible in this crucible body, in the first recess of rack embedding this crucible earlier, like this after heating quartz crucible, through upwards promoting the rack, can follow this internal taking out of carbon-carbon composite crucible with quartz crucible, the operation is very simple, convenient.

Drawings

FIG. 1 is a schematic view of a crucible body structure in example 1;

FIG. 2 is a front view of a crucible body in example 1;

fig. 3 is a schematic view showing the structure of the net frame in example 1;

FIG. 4 is a schematic view showing the overall structure of the crucible body and the rack in combination in example 1;

FIG. 5 is a schematic structural view of a bowl-shaped tray in embodiment 2;

fig. 6 is a top view of the bowl-shaped tray in embodiment 2.

Fig. 7 is a cross-sectional view taken at a-a in fig. 6.

FIG. 8 is a schematic view of the structure of the cylinder in example 2.

FIG. 9 is a top view of the cylinder in example 2.

Fig. 10 is a sectional view at B-B in fig. 9.

Fig. 11 is a schematic view showing the structure of the rack of example 2.

FIG. 12 is a schematic view showing the entire structure of the crucible body and the rack in combination in example 2.

Wherein: 1-crucible body, 11-bowl-shaped tray, 12-cylinder, 121-hanging hole, 2-first groove, 3-second groove, 101-wire frame, 1011-lower wire frame, 1012-upper wire frame and 1013-annular wire frame.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example 1

A carbon-carbon composite crucible is shown in figures 1 to 4 and comprises a crucible body 1 and a net rack 101, wherein the crucible body 1 is made of a carbon-carbon composite material, a plurality of first grooves 2 are uniformly formed in the inner wall of the crucible body 1, and the first grooves 2 extend downwards along the inner wall of the crucible body 1 and are converged at the bottom of the crucible body 1 to form a net-shaped structure; the net rack 101 is matched with the first grooves 2, the net rack 101 can be just embedded into the first grooves 2 in a net structure, and the head of the net rack 101 extends out of the top ends of the first grooves 2. The net rack 101 is made of high temperature resistant material, specifically magnesium oxide, boron nitride and the like.

After imbedding rack 101 into the crucible body 1 of looks adaptation, put into crucible body 1 with quartz crucible again and heat, when the heating is accomplished and need take out quartz crucible, directly upwards mention rack 101, quartz crucible is lived and is taken out crucible body 1 with it to rack 101 pocket, and easy operation is convenient.

Example 2

As shown in fig. 5 to 12, unlike embodiment 1, in this embodiment, the crucible body 1 is assembled by a bowl-shaped tray 11 at the lower part and a cylinder 12 at the upper part, and a hanging hole 121 is opened on the cylinder 12 to facilitate the movement of the cylinder 12. The top of bowl form tray 11 is interior toper, the bottom of drum 12 is with the outer toper of interior toper looks adaptation, places drum 12 on bowl form tray 11 after, interior toper and outer toper agree with each other, make drum 12 be connected closely, be difficult for shifting with bowl form tray 11. Second grooves 3 are circumferentially formed in the inner wall of the top end of the bowl-shaped tray 11 and the inner wall of the bottom end of the cylinder 12, and the cross sections of the second grooves are L-shaped; the rack 101 includes a lower rack 1011, an upper rack 1012, and a loop rack 1013 connecting the upper rack 1012 and the lower rack 1011, the loop rack 1013 fitting into the second trough 3, the lower rack 1011 fitting into the first trough 2 on the bowl tray 11, the upper rack 1012 fitting into the first trough 2 on the cylinder 12.

When using the crucible body 1, first, the lower rack 1011 of the rack 101 is partially fitted into the first well 2 of the bowl-like tray 11, at this time, the lower part of the ring-shaped rack 1013 is fitted into the second well 3 of the bowl-like tray 11, then the cylinder 12 is placed on the bowl-like tray 11, and at the same time, the cylinder 12 is rotated so that the upper rack 1012 is fitted into the first well 2 of the cylinder 12, at this time, the upper part of the ring-shaped rack 1013 is fitted into the second well 3 of the cylinder 12, and then the crucible body 1 is put into a quartz crucible and heated. When the quartz crucible needs to be taken out after the heating is completed, the cylinder 12 is first removed from the bowl-shaped tray 11 with the aid of the lifting hole 121, and then the rack 101 is lifted upward, and the rack 101 catches the quartz crucible and takes it out of the bowl-shaped tray 11.

The above embodiments are only used for illustrating the present invention, and not for limiting the present invention, and those skilled in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. The carbon-carbon composite crucible is characterized by comprising a crucible body (1) and a net rack (101), wherein the crucible body (1) is made of carbon-carbon composite materials, a plurality of first grooves (2) are uniformly formed in the inner wall of the crucible body (1), and the first grooves (2) extend downwards along the inner wall of the crucible body (1) and are converged at the bottom of the crucible body (1) to form a net-shaped structure; the net rack (101) is matched with the first grooves (2), the net rack (101) can be just embedded into the first grooves (2) which are of a net structure, and the head of the net rack (101) extends out of the top ends of the first grooves (2).

2. The carbon-carbon composite crucible as claimed in claim 1, wherein the crucible body (1) is assembled by a lower bowl-shaped tray (11) and an upper cylinder (12).

3. The carbon-carbon composite crucible as claimed in claim 2, wherein the inner wall of the top end of the bowl-shaped tray (11) and the inner wall of the bottom end of the cylinder (12) are both circumferentially provided with second grooves (3), and the cross section of each second groove (3) is L-shaped; the rack (101) includes lower net rack (1011), upper net rack (1012) and is used for connecting annular net rack (1013) of upper net rack (1012) and lower net rack (1011), annular net rack (1013) with second recess (3) looks adaptation, lower net rack (1011) with first recess (2) looks adaptation on bowl form tray (11), upper net rack (1012) with first recess (2) looks adaptation on drum (12).

4. The carbon-carbon composite crucible as claimed in claim 2 or 3, wherein the top end of the bowl-shaped tray (11) is of an internal taper and the bottom end of the cylinder (12) is of an external taper adapted to the internal taper.

5. The carbon-carbon composite crucible as claimed in claim 1, wherein the grid (101) is made of a high temperature resistant material.