CN112176403A - Integrally woven crucible preform and coated crucible made of same - Google Patents
Integrally woven crucible preform and coated crucible made of same Download PDFInfo
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- CN112176403A CN112176403A CN202011129237.1A CN202011129237A CN112176403A CN 112176403 A CN112176403 A CN 112176403A CN 202011129237 A CN202011129237 A CN 202011129237A CN 112176403 A CN112176403 A CN 112176403A
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- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 235
- 239000004917 carbon fiber Substances 0.000 claims abstract description 235
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 226
- 238000009941 weaving Methods 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- 238000013461 design Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 238000010923 batch production Methods 0.000 abstract description 4
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- 238000004519 manufacturing process Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 238000007789 sealing Methods 0.000 description 9
- 239000002131 composite material Substances 0.000 description 8
- 229910002804 graphite Inorganic materials 0.000 description 7
- 239000010439 graphite Substances 0.000 description 7
- 238000009940 knitting Methods 0.000 description 5
- 239000010453 quartz Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000011800 void material Substances 0.000 description 4
- 208000034189 Sclerosis Diseases 0.000 description 3
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000000280 densification Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 238000005260 corrosion Methods 0.000 description 2
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- 238000005536 corrosion prevention Methods 0.000 description 2
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- 230000003628 erosive effect Effects 0.000 description 2
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
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- 229920000297 Rayon Polymers 0.000 description 1
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- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
- C30B15/10—Crucibles or containers for supporting the melt
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B28/00—Production of homogeneous polycrystalline material with defined structure
- C30B28/04—Production of homogeneous polycrystalline material with defined structure from liquids
- C30B28/10—Production of homogeneous polycrystalline material with defined structure from liquids by pulling from a melt
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/06—Silicon
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
- D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
- D04C1/02—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof made from particular materials
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
- D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
- D04C1/06—Braid or lace serving particular purposes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Textile Engineering (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Ceramic Products (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention provides an integrally woven crucible preform, which is a net-shaped body woven by one or more carbon fiber ropes, and is woven in a dense state at the lower end of an upper end opening. The crucible is formed by weaving one carbon fiber rope or a plurality of carbon fiber ropes, and a prefabricated body does not need to be needled, so that the working time is saved; the straight carbon fiber rope is adopted for weaving, a blank does not need to be manufactured, the shape plasticity is strong, the blank is not limited, the flexible design can be realized, the delivery period is shortened in batch production, and the material processing waste is less.
Description
Technical Field
The invention relates to application of a carbon fiber composite material in the manufacturing process of monocrystalline silicon or polycrystalline silicon, in particular to an integrally woven crucible preform woven by the carbon fiber composite material and a coating crucible made of the integrally woven crucible preform.
Background
In the production of silicon single crystals, the czochralski method (CZ method), which is a method of pulling a single crystal from a melt in a vertical direction, is currently widely used. In the manufacturing apparatus, one of the members is a graphite crucible for carrying a quartz crucible therein. In the using process, the problems of cracking, erosion loss and the like of the graphite crucible exist due to different expansion coefficients of the quartz crucible and the graphite crucible and the erosion reaction between silicon vapor and graphite. Moreover, as the diameter of the crystal grown by the single crystal silicon is thicker and thicker, the diameter of the corresponding single crystal furnace is larger and larger, and thus the reliability of the thermal field is required to be higher and higher. Because of the strength limitation of the graphite crucible, the larger the diameter, the larger the wall thickness requirement, so the weight is heavy, and the heat capacity is high, thereby leading to heavy operation, increased energy consumption and increased cost.
As a technique not using a large-sized graphite crucible, the applicant has proposed a technique including forming carbon fibers into a crucible shape by a filament winding method, impregnating them with a resin or pitch as a matrix, and then firing to manufacture a crucible made of a carbon/carbon fiber composite material (hereinafter referred to as a C/C composite material), and a technique including attaching a carbon fiber cloth to a forming die, performing forming and curing to obtain a carbon fiber-reinforced plastic, and then impregnating and firing to manufacture a crucible made of a C/C composite material. . . And so on. For example, patent No. 200910118210.X discloses a crucible holding member of a hollow mesh body, which is formed by braiding a plurality of strands; however, these crucibles formed by weaving must be processed by adding a binder, carbonizing at a high temperature, and vapor-depositing, which is very time-consuming, but the edges of these crucibles are not reinforced and have no surface coating treatment, so that the edge portions of the crucibles are very easily corroded during use, resulting in insufficient strength.
Thus, the prior art crucible also has a place to lift.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention provides a carbon fiber composite material woven monolithic woven crucible preform and a coated crucible made therefrom, so as to solve the problems of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a wholly weave crucible preform, crucible preform weaves the dictyosome that forms by one or many carbon fiber ropes, the crucible is closely knit form of upper end opening lower extreme and weaves.
According to a preferred embodiment of the present application, the integrally woven crucible preform comprises: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; the net-shaped bodies of the straight cylinder body and the bowl-shaped body are aligned by one or more carbon fiber ropes along a first direction inclined at a first angle relative to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and wherein the first and second directions are symmetrical with respect to the central axis.
The integrally woven crucible preform according to the preferred embodiment of the present application, which includes a crucible body portion; the crucible body portion is including straight barrel, bowl body and bowl bottom body, straight barrel and bowl form body include a plurality of axial strips, one or many the carbon fiber rope winds axial strip spiral is woven, axial strip and one or many the contained angle that the direction was woven to the carbon fiber rope spiral is less than 90 degrees for being greater than 70 degrees.
According to the application, the integrally woven crucible preform is preferably implemented, the net-shaped body woven in the compact shape of the bowl bottom body comprises one or more carbon fiber ropes and one or more carbon fiber ropes, wherein one part of the one or more carbon fiber ropes is radiated outwards from the circle center, one part of the one or more carbon fiber ropes is wound around to be circular, one or more carbon fiber ropes radiated outwards from the circle center are arranged above the one or more carbon fiber ropes, and one time of the one or more carbon fiber ropes is in the compact shape after being connected in a cross mode below the one or more carbon fiber ropes wound to be circular.
According to the integrally woven crucible preform, the net-shaped body which is densely woven with the bowl bottom comprises a first group of carbon fiber ropes and a second group of carbon fiber ropes; the carbon fiber ropes forming the first group of carbon fiber ropes are consistent in direction, and the carbon fiber ropes forming the second group of carbon fiber ropes are consistent in direction; the first group of carbon fiber ropes are arranged above the second group of carbon fiber ropes at one time, and the second group of carbon fiber ropes are arranged below the second group of carbon fiber ropes at one time in a cross connection mode to form a compact shape.
According to the integrally woven crucible preform, the net-shaped body which is densely woven with the bowl bottom comprises at least two groups of carbon fiber ropes; the carbon fiber ropes are connected around the first group of carbon fiber ropes to be in a compact shape, the first group of carbon fiber ropes radiating outwards from the circle center are arranged above the second group of carbon fiber ropes surrounding the circular shape at one time, and the second group of carbon fiber ropes surrounding the circular shape at one time are in a compact shape in a cross connection mode.
An integrally woven crucible preform, comprising: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; wherein the body portion is formed by aligning one or more carbon fiber ropes in a first direction inclined at a first angle with respect to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and wherein the first and second directions are symmetrical with respect to the central axis.
The utility model provides a coating crucible of wholly weaving, the reticulation body that the crucible was woven and is formed by one or many carbon fiber ropes, the crucible is that the dense form of upper end opening lower extreme is woven, and carbon fiber surface and between cladding or packing deposit carbon layer or sclerosis thing layer.
The integrally woven coated crucible in accordance with the preferred embodiments of the present application, said crucible comprising: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; the net-shaped bodies of the straight cylinder body and the bowl-shaped body are aligned by one or more carbon fiber ropes along a first direction inclined at a first angle relative to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and wherein the first and second directions are symmetrical with respect to the central axis.
The integrally woven coated crucible in accordance with the preferred embodiment of the present application, comprising a body portion; the crucible body portion is including straight barrel, bowl body and bowl bottom body, straight barrel and bowl form body include a plurality of axial strips, one or many the fibre rope winds axial strip spiral is woven, the axial strip with the contained angle that the direction was woven to the carbon fibre rope spiral is less than 90 degrees for being greater than 70 degrees.
According to the application, the integrally-woven coating crucible is preferably implemented, the net-shaped body woven in the compact shape of the bowl bottom comprises a part of carbon fiber ropes radiating outwards from the circle center and a part of carbon fiber ropes encircling into a circular shape, the carbon fiber ropes radiating outwards from the circle center are arranged above the circular carbon fiber ropes at one time, and the carbon fiber ropes are in cross connection with one another below the circular carbon fiber ropes at one time to form the compact shape.
According to the integrally woven coating crucible implemented in the application, the net-shaped body densely woven with the bowl bottom comprises a first group of carbon fiber ropes and a second group of carbon fiber ropes; the carbon fiber ropes forming the first group of carbon fiber ropes are consistent in direction, and the carbon fiber ropes forming the second group of carbon fiber ropes are consistent in direction; the first group of carbon fiber ropes are arranged above the second group of carbon fiber ropes at one time, and the second group of carbon fiber ropes are arranged below the second group of carbon fiber ropes at one time in a cross connection mode to form a compact shape.
According to the integrally woven coating crucible implemented in the application, the net-shaped body densely woven with the bowl bottom comprises at least two groups of carbon fiber ropes; the carbon fiber ropes are connected around the first group of carbon fiber ropes to be in a compact shape, the first group of carbon fiber ropes radiating outwards from the circle center are arranged above the second group of carbon fiber ropes surrounding the circular shape at one time, and the second group of carbon fiber ropes surrounding the circular shape at one time are in a compact shape in a cross connection mode.
An integrally woven coated crucible, the crucible comprising: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; wherein the body portion is formed by aligning one or more carbon fiber ropes in a first direction inclined at a first angle with respect to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and the first direction and the second direction are symmetrical relative to the central axis, and the surfaces of the carbon fibers are coated or filled with deposited carbon layers or hardened substance layers.
Due to the adoption of the technical characteristics, compared with the prior art, the invention has the following advantages and positive effects:
firstly, the crucible is woven by adopting a straight carbon fiber rope, a blank does not need to be manufactured, the shape plasticity of the crucible is strong, the crucible is not limited by the blank, the crucible can be flexibly designed, the delivery period is shortened in batch production, and the material processing waste is less;
secondly, the edge sealing design can effectively connect the carbon fiber ropes without using adhesives, has strong supporting force and solves the connection problem;
thirdly, the edge sealing design can effectively strengthen the edge of the crucible, and has the effects of corrosion prevention and enhancement;
fourthly, the surface of the crucible is subjected to surface treatment, so that corrosion can be effectively reduced, and the service life is prolonged;
fifth, the crucible of the application is made of continuous fibers, has certain toughness, can be deformed properly along with expansion and contraction of the quartz crucible, cannot be cracked inwards as the conventional crucible is, and is beneficial to prolonging the service life of the crucible;
sixthly, the design of thin walls and hollowing is adopted, so that the infrared radiation heat can be more quickly transferred to the silicon material, the melting of the silicon is accelerated, the material melting time can be effectively shortened, and the working hours and the cost are saved; seventh, the use of the braided crucible does not need post-machining, so that the use of raw materials can be greatly saved, and the manufacturing cost is reduced;
eighthly, the weight of the braided crucible is reduced by more than 60%, so that the heat capacity can be reduced, the temperature rise and fall time can be shortened, and the energy consumption can be saved.
Of course, it is not necessary for any particular embodiment of the inventive concept to be implemented to achieve all of the above technical effects at the same time.
Drawings
FIG. 1 is a schematic view of a crucible of the present application;
FIG. 2 is a schematic view of a carbon fiber braided tube;
FIG. 3 is one of the weaving diagrams;
FIG. 4 is a second schematic view of knitting;
FIG. 5 is a third schematic view of knitting;
FIG. 6 is a fourth schematic view of knitting;
FIG. 7 is a schematic view of another alternative weave construction of the present application;
FIG. 8 is a schematic view of a bowl bottom structure;
FIG. 9 is a schematic view of another angle of FIG. 8;
FIG. 10 is a schematic view of another structure of the bowl bottom body;
fig. 11 is a schematic view of another structure of the bowl bottom.
Detailed Description
Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, and so forth have not been described in detail so as not to unnecessarily obscure aspects of the present invention.
The core thought of this application lies in, makes a crucible, effectual improvement and surpasss the life-span of traditional crucible, the crucible includes an upper seal limit portion and the crucible body portion of weaving the structure, the crucible at first needs to weave into the preform with the fibre, the preform means does not have the body of weaving before the densification sclerosis, then obtains the crucible of sclerosis through the densification processing. The densification hardening includes vapor deposition, liquid deposition, sintering, etc., which are well known technologies and will not be described herein. The structure of the crucible can be flexibly designed according to the actual design requirement without manufacturing a blank again, so that the cost can be effectively saved, the delivery time can be shortened, and the crucible can be produced in batch.
The present application will be described in detail below with reference to the accompanying drawings. Referring to fig. 1 and 2, a one-piece woven crucible, which is shown for illustrative purposes only and is not intended to limit the present application, is applied to a carbon fiber composite material used in a process for manufacturing single crystal silicon or polycrystalline silicon, and is formed by weaving a carbon fiber rope or carbon fiber ropes into a mesh body, and is densely woven with an open upper end and a closed lower end. As described above, the crucible is first woven from fibers to form a preform, i.e., a wholly woven crucible preform as referred to in the present application, which will be referred to as a crucible preform in the following description.
One embodiment of the present application is: the crucible preform is a reticular body formed by weaving one or more carbon fiber ropes, and the crucible preform is woven in a dense state at the upper end and the lower end.
Further, the crucible preform includes: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; the net-shaped bodies of the straight cylinder body and the bowl-shaped body are aligned by one or more carbon fiber ropes along a first direction inclined at a first angle relative to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and wherein the first and second directions are symmetrical with respect to the central axis.
Additionally or alternatively, the crucible preform includes a body portion; the crucible body portion is including straight barrel, bowl body and bowl bottom body, straight barrel and bowl form body include a plurality of axial strips, one or many the carbon fiber rope winds axial strip spiral is woven, axial strip and one or many the contained angle that the direction was woven to the carbon fiber rope spiral is less than 90 degrees for being greater than 70 degrees.
The bowl bottom body is described as follows, the net-shaped body woven in a dense shape of the bowl bottom body comprises one or more carbon fiber ropes and one or more carbon fiber ropes, wherein one part of the one or more carbon fiber ropes is radiated outwards from the circle center, and one part of the one or more carbon fiber ropes is encircled into a circle.
In another bowl bottom body, the net-shaped body densely woven by the bowl bottom body comprises a first group of carbon fiber ropes and a second group of carbon fiber ropes; the carbon fiber ropes forming the first group of carbon fiber ropes are consistent in direction, and the carbon fiber ropes forming the second group of carbon fiber ropes are consistent in direction; the first group of carbon fiber ropes are arranged above the second group of carbon fiber ropes at one time, and the second group of carbon fiber ropes are arranged below the second group of carbon fiber ropes at one time in a cross connection mode to form a compact shape.
In yet another aspect of the bowl bottom body, the net-shaped body densely woven by the bowl bottom body comprises at least two groups of carbon fiber ropes; the carbon fiber ropes are connected around the first group of carbon fiber ropes to be in a compact shape, the first group of carbon fiber ropes radiating outwards from the circle center are arranged above the second group of carbon fiber ropes surrounding the circular shape at one time, and the second group of carbon fiber ropes surrounding the circular shape at one time are in a compact shape in a cross connection mode.
The integrally woven coating crucible is made of the crucible preform, the crucible is a net-shaped body formed by weaving one or more carbon fiber ropes, the crucible is a net-shaped body formed by weaving an upper end opening and a lower end, a carbon fiber surface (the surface of the hardened carbon fiber ropes is called as the carbon fiber surface) and a deposited carbon layer or a hardened substance layer are coated or filled between the carbon fiber surface and the carbon fiber surface, and the hardened substance can be silicon carbide, silicon nitride or other ceramics and the like.
The crucible includes: an upper edge sealing portion 11 and a body portion formed by weaving one or more carbon fiber ropes 30 to be aligned obliquely with respect to a central axis, the body portion including a straight cylinder body 121, a bowl-shaped body 122, and a bowl-shaped bottom body 123. Each of the carbon fiber ropes 30 comprises a plurality of carbon fiber yarns, the carbon fiber yarns parallel to the axis of the rope are arranged in the center of the rope, and the carbon fiber braided tube 40 is coated outside the carbon fiber yarns parallel to the axis.
The upper edge sealing part 11 is an annular body and is formed by weaving one or more carbon fiber ropes 30, and the weaving method of the upper edge sealing part 11 is different from that of the crucible body part; one weaving mode of the crucible body part is as follows: the mesh bodies of the straight cylinder 121 and the bowl 122 are aligned by one or more carbon fiber ropes 30 in a first direction inclined at a first angle with respect to the central axis; aligned by one or more carbon fiber strands 30 in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and wherein the first and second directions are symmetrical with respect to the central axis. The weave pattern of this embodiment is referred to as a cross weave pattern.
The mesh bodies of the straight cylinder 121 and the bowl body 122 can secure high strength because the carbon fiber ropes 30 and the carbon fiber ropes 30 are interlaced with each other in a braid shape therebetween, and can firmly hold even a quartz crucible having a large weight. In addition, in the embodiment, the carbon fiber ropes 30 and the carbon fiber ropes 30 are aligned diagonally with respect to the central axis of the mesh body, rather than being aligned in the direction perpendicular to the central axis, and thus a structure having low rigidity in the circumferential direction is obtained. In view of this, even when a force expanding in the circumferential direction acts on the crucible due to the above-described reasons, the lattice formed by the carbon fiber ropes 30 and the carbon fiber ropes 30 is twisted, whereby the mesh body can be enlarged in the circumferential direction, and the expansion in the circumferential direction can be absorbed. Therefore, breakage of the carbon fiber is unlikely to occur, the shape is not largely lost, and thus the crucible has excellent shape stability.
Further, in the mesh body, the carbon fiber ropes 30 and the inclination angles of the carbon fiber ropes 30 with respect to the central axis may be appropriately changed depending on the rigidity required for each part of the crucible. The circumferential rigidity of the mesh body can be adjusted by changing the inclination angle, and thus the circumferential rigidity can be changed according to the use or according to each part of the mesh body. In other words, the first angle and the second angle vary with different parts of the hollow mesh body.
Referring to fig. 7, another weaving manner of the body portion is: in another embodiment of the straight cylinder 121 and bowl 122 of the present application, the crucible includes a body portion; the crucible body portion is including straight barrel, bowl body and bowl bottom body, straight barrel and bowl form body include a plurality of axial strip 50, one or many the carbon fiber rope winds axial strip spiral is woven, the axial strip with the contained angle that the direction was woven to the carbon fiber rope spiral is less than 90 degrees for being greater than 70 degrees. The axial strips 50 are one of carbon-carbon rods, graphite rods, high-temperature ceramic rods, high-temperature metal rods and carbon fiber ropes. The weave pattern of this embodiment we refer to as a spiral weave pattern.
In this embodiment, as shown in fig. 7, the crucible has no upper edge sealing part, and can be supported at the lower opening of the spiral weaving without being scattered, the vertical axial strips 50 of the straight cylinder and the bowl-shaped body enhance the supporting strength in the height direction of the crucible, the circumferential strength of the crucible ring of the horizontal spiral weaving is increased, the upper and lower diameters are more accurate, the spiral weaving is adopted, the weaving is simpler, the manufacturing time is reduced, and the material cost and the use cost are greatly reduced, and the so-called spiral is a twisted curve like a spiral and a screw.
The carbon fiber ropes 30 are each formed by bundling about several tens of thousands of carbon fibers. As the carbon fibers constituting the carbon fiber rope 30, pitch-based carbon fibers, PAN-based carbon fibers, viscose-based carbon fibers, or the like can be used. The carbon fibers that make up the carbon fiber rope 30 may be the same material or different materials.
The upper hem part 11 is knitted or woven, and as shown in fig. 3, 4, 5 and 6, the upper hem part 11 is formed by knitting one or more carbon fiber ropes 30 in various knitting manners.
Next, the bowl bottom body 123 is described, and in a first embodiment, as shown in fig. 8 and 9, the mesh body of the bowl bottom body 123 includes one or more carbon fiber ropes partially radiating from the center of the circle and one or more carbon fiber ropes partially encircling the circle, when two portions of the carbon fiber ropes cross each other, the one or more carbon fiber ropes radiating from the center of the circle are positioned above the one or more carbon fiber ropes encircling the circle at one time, and are cross-connected below the one or more carbon fiber ropes encircling the circle at one time to form a compact shape. The dense state as referred to herein means a state in which the carbon fiber ropes are close to each other, and no void is intentionally left.
Referring to fig. 10, in a second embodiment, the net-shaped body of the bowl bottom 123 includes a first group of carbon fiber ropes and a second group of carbon fiber ropes; the carbon fiber ropes forming the first group of carbon fiber ropes are consistent in direction, and the carbon fiber ropes forming the second group of carbon fiber ropes are consistent in direction; the first group of carbon fiber ropes are arranged above the second group of carbon fiber ropes at one time, and the second group of carbon fiber ropes are arranged below the second group of carbon fiber ropes at one time in a cross connection mode to form a compact shape. The dense state as referred to herein means a state in which the carbon fiber ropes are close to each other, and no void is intentionally left.
In another embodiment, as shown in fig. 11, the net-shaped body of the bowl bottom body 123 includes at least two groups of carbon fiber ropes; the at least two groups of carbon fiber ropes are connected in a dense mode in a weaving mode. The dense state as referred to herein means a state in which the carbon fiber ropes are close to each other, and no void is intentionally left. As shown, the mesh body of the bowl bottom body 123 includes at least two groups of carbon fiber ropes; the carbon fiber ropes are connected around the first group of carbon fiber ropes to be in a compact shape, the first group of carbon fiber ropes radiating outwards from the circle center are arranged above the second group of carbon fiber ropes surrounding the circular shape at one time, and the second group of carbon fiber ropes surrounding the circular shape at one time are in a compact shape in a cross connection mode.
As described above, the three shapes of the net-shaped body of the bowl bottom 123 are not intended to limit the present invention, and the net-shaped body is formed in a woven manner.
Another embodiment of the present application is: the crucible preform includes: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; wherein the body portion is formed by aligning one or more carbon fiber ropes in a first direction inclined at a first angle with respect to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and wherein the first and second directions are symmetrical with respect to the central axis.
In this embodiment, the weaving manner of the bowl bottom body may be a mesh hollow weaving manner or a dense weaving manner, wherein the mesh hollow means that the carbon fiber ropes are not in a state of being close to each other, and a gap is intentionally left; the solid weave is a state in which the carbon fiber ropes are close to each other as described above, and no void is intentionally left.
An integrally woven coated crucible made from the crucible preform, the crucible comprising: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; wherein the body portion is formed by aligning one or more carbon fiber ropes in a first direction inclined at a first angle with respect to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and the first direction and the second direction are symmetrical relative to the central axis, and the carbon fiber surface (the surface of the carbon fiber rope after hardening is called the carbon fiber surface) is coated or filled with a deposited carbon layer or a hardened substance layer, wherein the hardened substance can be silicon carbide, silicon nitride or other ceramics and the like.
In summary, in the spiral weaving manner, due to the existence of the axial strips, the upper seal edge may be provided or not provided according to the requirement of the seal edge; in addition, an upper sealing edge is required in the cross weaving mode. In the weaving manner of the straight cylinder 121 and the bowl-shaped body 122, a mixed weaving manner may be adopted, for example, the straight cylinder 121 is spirally woven, the bowl-shaped body 122 is crosswise woven, for example, the straight cylinder 121 is crosswise woven, and the bowl-shaped body 122 is spirally woven, which may be flexibly applied.
Compared with the crucible in the prior art, the crucible of the application adopts carbon fiber composite's carbon fiber rope 30 to weave, need not make the idiosome, and the shape of crucible does not receive the restriction of idiosome, can design in a flexible way, because the raw materials specification is unified, can batch production, and production efficiency improves greatly moreover, shortens greatly in the crucible manufacturing process during labour time simultaneously, so the cost is lower, and delivery cycle is short, easily supplies.
In summary, due to the adoption of the technical characteristics, compared with the prior art, the invention has the following advantages and positive effects:
firstly, the crucible is woven by adopting a straight carbon fiber rope, a blank does not need to be manufactured, the shape plasticity of the crucible is strong, the crucible is not limited by the blank, the crucible can be flexibly designed, the delivery period is shortened in batch production, and the material processing waste is less;
secondly, the edge sealing design can effectively connect the carbon fiber ropes without using adhesives, has strong supporting force and solves the connection problem;
thirdly, the edge sealing design can effectively strengthen the edge of the crucible, and has the effects of corrosion prevention and enhancement;
fourthly, the surface of the crucible is subjected to surface treatment, so that corrosion can be effectively reduced, and the service life is prolonged; fifth, the crucible of the application is made of continuous fibers, has certain toughness, can be deformed properly along with expansion and contraction of the quartz crucible, cannot be cracked inwards as the conventional crucible is, and is beneficial to prolonging the service life of the crucible;
sixthly, the design of thin walls and hollowing is adopted, so that the infrared radiation heat can be more quickly transferred to the silicon material, the melting of the silicon is accelerated, the material melting time can be effectively shortened, and the working hours and the cost are saved; seventh, the use of the braided crucible does not need post-machining, so that the use of raw materials can be greatly saved, and the manufacturing cost is reduced;
eighthly, the weight of the braided crucible is reduced by more than 60%, so that the heat capacity can be reduced, the temperature rise and fall time can be shortened, and the energy consumption can be saved.
The preferred embodiments of the invention are provided solely to aid in the illustration of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents. The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and it is intended that all equivalent variations and modifications of the present invention as those skilled in the art can be made without departing from the spirit and scope of the present invention.
Claims (14)
1. The integrally woven crucible preform is characterized in that the crucible preform is a mesh body formed by weaving one or more carbon fiber ropes, and the crucible is woven in a dense shape with an upper end opening and a lower end.
2. The integrally woven crucible preform of claim 1, wherein the crucible preform comprises: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; the net-shaped bodies of the straight cylinder body and the bowl-shaped body are aligned by one or more carbon fiber ropes along a first direction inclined at a first angle relative to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and wherein the first and second directions are symmetrical with respect to the central axis.
3. The integrally woven crucible preform of claim 1, wherein the crucible preform comprises a body portion; the crucible body portion is including straight barrel, bowl body and bowl bottom body, straight barrel and bowl form body include a plurality of axial strips, one or many the carbon fiber rope winds axial strip spiral is woven, axial strip and one or many the contained angle that the direction was woven to the carbon fiber rope spiral is less than 90 degrees for being greater than 70 degrees.
4. The integrally woven crucible preform as claimed in claim 2 or 3, wherein the net-shaped body of the densely woven bowl bottom comprises a portion of one or more carbon fiber ropes radiating from the center of the circle and a portion of one or more carbon fiber ropes encircling the circle, and the one or more carbon fiber ropes radiating from the center of the circle are crossed and connected to form a dense shape above the one or more carbon fiber ropes encircling the circle at one time and below the one or more carbon fiber ropes encircling the circle at one time.
5. The integrally woven crucible preform of claim 2 or 3, wherein said densely woven mesh of bowl bottoms comprises a first plurality of carbon fiber strands and a second plurality of carbon fiber strands; the carbon fiber ropes forming the first group of carbon fiber ropes are consistent in direction, and the carbon fiber ropes forming the second group of carbon fiber ropes are consistent in direction; the first group of carbon fiber ropes are arranged above the second group of carbon fiber ropes at one time, and the second group of carbon fiber ropes are arranged below the second group of carbon fiber ropes at one time in a cross connection mode to form a compact shape.
6. The integrally woven crucible preform of claim 2 or 3, wherein said densely woven web of bowl bottoms comprises at least two groups of carbon fiber strands; the carbon fiber ropes are connected around the first group of carbon fiber ropes to be in a compact shape, the first group of carbon fiber ropes radiating outwards from the circle center are arranged above the second group of carbon fiber ropes surrounding the circular shape at one time, and the second group of carbon fiber ropes surrounding the circular shape at one time are in a compact shape in a cross connection mode.
7. An integrally woven crucible preform, comprising: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; wherein the body portion is formed by aligning one or more carbon fiber ropes in a first direction inclined at a first angle with respect to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and wherein the first and second directions are symmetrical with respect to the central axis.
8. The integrally woven coating crucible is characterized in that the crucible is a net-shaped body formed by weaving one or more carbon fiber ropes, the crucible is a net-shaped body with an upper end opening and a lower end densely woven, and carbon fiber surfaces and spaces between the carbon fiber surfaces are coated or filled with deposited carbon layers or hardened substance layers.
9. The integrally woven, coated crucible according to claim 8, wherein said crucible comprises: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; the net-shaped bodies of the straight cylinder body and the bowl-shaped body are aligned by one or more carbon fiber ropes along a first direction inclined at a first angle relative to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and wherein the first and second directions are symmetrical with respect to the central axis.
10. The integrally woven, coated crucible according to claim 8, wherein said crucible comprises a body portion; the crucible body portion is including straight barrel, bowl body and bowl bottom body, straight barrel and bowl form body include a plurality of axial strips, one or many the fibre rope winds axial strip spiral is woven, the axial strip with the contained angle that the direction was woven to the carbon fibre rope spiral is less than 90 degrees for being greater than 70 degrees.
11. The integrally woven coated crucible of claim 9 or 10, wherein the densely woven mesh of the bowl bottom comprises a portion of the carbon fiber ropes radiating from the center of the circle and a portion of the carbon fiber ropes encircling the circle, and the carbon fiber ropes radiating from the center of the circle are cross-connected to form a dense shape at a time above the carbon fiber ropes encircling the circle and at a time below the carbon fiber ropes encircling the circle.
12. The integrally woven coated crucible of claim 9 or 10, wherein said densely woven web of said bowl bottom comprises a first plurality of carbon fiber strands and a second plurality of carbon fiber strands; the carbon fiber ropes forming the first group of carbon fiber ropes are consistent in direction, and the carbon fiber ropes forming the second group of carbon fiber ropes are consistent in direction; the first group of carbon fiber ropes are arranged above the second group of carbon fiber ropes at one time, and the second group of carbon fiber ropes are arranged below the second group of carbon fiber ropes at one time in a cross connection mode to form a compact shape.
13. The integrally woven coated crucible of claim 9 or 10, wherein said densely woven web of bowl bottoms comprises at least two groups of carbon fiber strands; the carbon fiber ropes are connected around the first group of carbon fiber ropes to be in a compact shape, the first group of carbon fiber ropes radiating outwards from the circle center are arranged above the second group of carbon fiber ropes surrounding the circular shape at one time, and the second group of carbon fiber ropes surrounding the circular shape at one time are in a compact shape in a cross connection mode.
14. An integrally woven coated crucible, comprising: the crucible body comprises a straight cylinder body, a bowl-shaped body and a bowl bottom body; wherein the body portion is formed by aligning one or more carbon fiber ropes in a first direction inclined at a first angle with respect to the central axis; aligned by one or more carbon fiber strands in a second direction inclined at a second angle relative to the central axis; the second angle is the same as the first angle, and the first direction and the second direction are symmetrical relative to the central axis, and the surfaces of the carbon fibers are coated or filled with deposited carbon layers or hardened substance layers.
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