CN112195508A - Integrally woven crucible preform with bottom hole and coated crucible made of same - Google Patents
Integrally woven crucible preform with bottom hole and coated crucible made of same Download PDFInfo
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- CN112195508A CN112195508A CN202011129239.0A CN202011129239A CN112195508A CN 112195508 A CN112195508 A CN 112195508A CN 202011129239 A CN202011129239 A CN 202011129239A CN 112195508 A CN112195508 A CN 112195508A
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- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 85
- 239000004917 carbon fiber Substances 0.000 claims abstract description 85
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000009941 weaving Methods 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 208000034189 Sclerosis Diseases 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 8
- 238000010923 batch production Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 14
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- 239000010439 graphite Substances 0.000 description 9
- 239000010453 quartz Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000002131 composite material Substances 0.000 description 7
- 238000009940 knitting Methods 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000000835 fiber 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
- 239000011203 carbon fibre reinforced carbon Substances 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
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
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- 230000003628 erosive effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 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
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- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
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Images
Classifications
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- 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
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2101/00—Inorganic fibres
- D10B2101/10—Inorganic fibres based on non-oxides other than metals
- D10B2101/12—Carbon; Pitch
Landscapes
- 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)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention provides an integrally woven crucible preform with a bottom hole, which is an annular hollow reticular body formed by weaving one or more carbon fiber ropes, wherein the diameter of an upper end opening of the crucible preform is larger than that of a lower end opening of the crucible preform. 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 with a bottom hole and a coated crucible manufactured by 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 integrally woven crucible preform with a bottom hole 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 take whole crucible preform of weaving of bottom outlet, the crucible preform is woven the annular cavity dictyosome that forms by one or many carbon fiber ropes, the diameter of the upper end opening of crucible preform is greater than the diameter of lower extreme opening.
According to a preferred embodiment of the present application, a integrally woven crucible preform with a bottom hole includes: the middle ring part is an annular hollow reticular body which is formed by weaving one or more carbon fiber ropes to be aligned obliquely relative to the central axis of the middle ring part; the middle ring part comprises a straight cylinder body and a bowl-shaped body.
According to the integrally woven crucible preform with a bottom hole, the mesh body of the middle ring part is 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.
According to the preferred embodiment of this application the whole crucible preform of weaving of band bottom hole, the crucible preform includes a well ring portion, well ring portion is an annular cavity dictyosome, well ring portion includes a plurality of axial strip, one or many the carbon fiber rope winds axial strip spiral is woven, axial strip with the contained angle of carbon fiber rope spiral direction of weaving is for being greater than 70 degrees and being less than 90 degrees.
The utility model provides a take coating crucible that whole woven of bottom outlet, the annular cavity dictyosome that the crucible was woven and is formed by one or many carbon fiber ropes, the upper end open-ended diameter of crucible is greater than lower extreme open-ended diameter, carbon fiber surface and between cladding or fill deposit carbon layer or sclerosis thing layer.
A integrally woven, coated crucible with a bottom hole according to a preferred embodiment of the present application, said crucible comprising: the middle ring part is an annular hollow reticular body which is formed by weaving one or more carbon fiber ropes to be aligned obliquely relative to the central axis of the middle ring part; the middle ring part comprises a straight cylinder body and a bowl-shaped body.
According to the integrally woven coated crucible with the bottom hole, the reticular body of the middle ring part is aligned by one or more carbon fiber ropes along a first direction inclined at a first angle relative to the central shaft; 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.
According to the coating crucible of whole weaving of band bottom hole of preferred embodiment of this application, the crucible includes a well ring portion, well ring portion is an annular cavity dictyosome, well ring portion includes a plurality of axial strip, one or many the carbon fiber rope winds axial strip spiral is woven, axial strip with the contained angle of carbon fiber rope spiral direction of weaving is for being greater than 70 degrees and being less than 90 degrees.
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;
ninth, bottom fretwork part can adopt low-cost graphite to replace, can conveniently beat quartz crucible from the bottom moreover, reduces quartz crucible's the time of getting the crucible, improves production efficiency.
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 middle ring portion of the present application.
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 idea of the application is to make a crucible, which effectively improves and exceeds the life of a conventional crucible, the crucible comprises a woven structure, the crucible is firstly woven into a preform by fibers, the preform is a woven body before densification and hardening, and then the densified crucible is hardened. 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 with a bottom hole, which is applied to the field of application of a carbon fiber composite material in the manufacturing process of monocrystalline silicon or polycrystalline silicon, is an annular hollow mesh body woven by one or more carbon fiber ropes, and the diameter of an upper opening of the crucible is larger than that of a lower opening of the crucible. As described above, the crucible is first woven from fibers to form a preform, i.e., a wholly woven crucible preform with a bottom hole as referred to in the present application, which will be referred to as a crucible preform in the following description.
The utility model provides a take whole of bottom outlet to weave crucible preform, the annular cavity dictyosome that crucible preform woven and formed by one or many carbon fiber rope, crucible preform's upper end open-ended diameter is greater than lower extreme open-ended diameter.
One example of a crucible preform of the present application is: the crucible preform includes: the middle ring part is an annular hollow reticular body which is formed by weaving one or more carbon fiber ropes to be aligned obliquely relative to the central axis of the middle ring part; the middle ring part comprises a straight cylinder body and a bowl-shaped body.
Wherein the mesh body of the middle ring portion is aligned by 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 weave pattern of this embodiment is referred to as a cross weave pattern.
Another example of a crucible preform of the present application is: the crucible preform comprises a middle ring part, the middle ring part is an annular hollow reticular body, the middle ring part comprises a plurality of axial strips, one or more carbon fiber ropes are wound around the axial strips and spirally woven, and included angles in the spiral weaving direction of the axial strips and the carbon fiber ropes are larger than 70 degrees and smaller than 90 degrees. The weave pattern of this embodiment we refer to as a spiral weave pattern. When the crucible is spirally woven, the middle ring part comprises a plurality of axial strips for supporting, so that no edge sealing part is available, or the edge sealing part can be simply surrounded and is not in a compact shape, and the middle ring part can also be provided with a straight cylinder body and a bowl-shaped body when the crucible preform is not provided with the edge sealing part.
An integrally woven coated crucible with a bottom opening, which is produced from the crucible preform, is referred to as a crucible in the following description.
One embodiment of the crucible of the application is as follows: the crucible is an annular hollow reticular body formed by weaving one or more carbon fiber ropes, the diameter of an opening at the upper end of the crucible is larger than that of an opening at the lower end of the crucible, a deposited carbon layer or a hardened substance layer is coated or filled between the surfaces of the carbon fibers (the surface of the hardened carbon fiber ropes is called as the surface of the carbon fibers), and the hardened substance can be silicon carbide, silicon nitride or other ceramics and the like.
In this embodiment, the crucible comprises: a middle ring part 12 and a sealing part at least at one end, in the embodiment of fig. 1, the number of the sealing parts is two, that is, an upper sealing part 11 and a lower sealing part 13, but it should be a protection scope of the present application, and the upper sealing part 11, the middle ring part 12 and the lower sealing part 13 are connected in sequence, wherein the middle ring part 12 is an annular hollow net body, and the annular hollow net body of the middle ring part 12 is formed by weaving one or more carbon fiber ropes 30 to be aligned obliquely with respect to a central axis of the middle ring part; the middle ring portion includes a straight cylinder 121 and a bowl 122. Each of the carbon fiber ropes 30 includes a plurality of carbon fiber yarns, the center of the rope is a carbon fiber yarn parallel to the axis of the rope, and the carbon fiber yarn parallel to the axis is coated with a carbon fiber braided tube 40, as shown in fig. 2.
The upper and lower hem seals 11, 13 are annular bodies woven from one or more carbon fiber ropes 30, the upper and lower hem seals 11, 13 are woven in a different manner from the middle ring portion 12, and the upper and lower hem seals 11, 13 have a higher weaving density than the middle ring portion 12; the mesh body of the middle ring section 12 is 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 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 body of the middle ring part 12 can secure high strength because the carbon fiber strands 30 and the carbon fiber strands 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.
The upper and lower hem portions 11 and 13 are knitted or woven, and as shown in fig. 3, 4, 5 and 6, the upper and lower hem portions 11 and 13 are formed by knitting one or more carbon fiber ropes 30 in various knitting manners.
Another embodiment of the crucible of the present application is: referring to fig. 7, in another knitting manner of the middle ring portion 12, the crucible includes a middle ring portion 12, the middle ring portion 12 is a ring-shaped hollow netted body, the middle ring portion 12 includes a plurality of axial strips 50, one or more carbon fiber ropes are spirally knitted around the axial strips, and an included angle between the axial strips and a spiral knitting direction of the carbon fiber ropes is greater than 70 degrees and smaller than 90 degrees. The weave pattern of this embodiment we refer to as a spiral weave pattern. When the crucible is spirally woven, the middle ring part comprises a plurality of axial strips for supporting, so that no edge sealing part is available, or the edge sealing part can be simply surrounded and is not in a sealing shape, and the middle ring part can also be provided with a straight cylinder body and a bowl-shaped body when the crucible is not provided with the edge sealing part.
The axial strips 50 are one of carbon-carbon rods, graphite rods, high-temperature ceramic rods, high-temperature metal rods and carbon fiber ropes. In this embodiment, the vertical axial strips 50 of the middle ring part 12 strengthen the supporting strength in the height direction of the crucible, the horizontal spirally-woven crucible side has increased circumferential strength, the upper and lower diameters are more accurate, spiral weaving is adopted, weaving is simpler, the manufacturing time is reduced, and the material cost and the use cost are greatly reduced, so that the 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.
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;
ninth, bottom fretwork part can adopt low-cost graphite to replace, can conveniently beat quartz crucible from the bottom moreover, reduces quartz crucible's the time of getting the crucible, improves production efficiency.
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 (8)
1. The integrally woven crucible preform with the bottom hole is characterized in that the crucible preform is an annular hollow netted body formed by weaving one or more carbon fiber ropes, and the diameter of an upper end opening of the crucible preform is larger than that of a lower end opening of the crucible preform.
2. The integrally woven crucible preform with a bottom hole of claim 1, wherein said crucible preform comprises: the middle ring part is an annular hollow reticular body which is formed by weaving one or more carbon fiber ropes to be aligned obliquely relative to the central axis of the middle ring part; the middle ring part comprises a straight cylinder body and a bowl-shaped body.
3. The integrally woven crucible preform with a bottom hole of claim 2, wherein the mesh-like body of the middle ring portion is aligned by one or more carbon fiber cords 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.
4. The integrally woven crucible preform with a bottom hole of claim 1, wherein the crucible preform comprises a middle ring portion, the middle ring portion is an annular hollow mesh body, the middle ring portion comprises a plurality of axial strips, one or more carbon fiber ropes are spirally woven around the axial strips, and an included angle between the axial strips and a spiral weaving direction of the carbon fiber ropes is greater than 70 degrees and smaller than 90 degrees.
5. The utility model provides a take coating crucible of whole weaving of bottom outlet which characterized in that, the annular cavity dictyosome that the crucible was woven and is formed by one or many carbon fiber rope, the upper end open-ended diameter of crucible is greater than the diameter of lower extreme open-ended, and carbon fiber surface and between wrap up or fill deposit carbon layer or sclerosis thing layer.
6. The integrally woven, coated crucible with a bottom hole of claim 5, wherein said crucible comprises: the middle ring part is an annular hollow reticular body which is formed by weaving one or more carbon fiber ropes to be aligned obliquely relative to the central axis of the middle ring part; the middle ring part comprises a straight cylinder body and a bowl-shaped body.
7. The integrally woven bottomed coated crucible of claim 6, wherein the mesh body of the middle ring portion is aligned by one or more carbon fiber strands 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, bottomed coated crucible of claim 5, wherein the crucible comprises a middle ring portion, the middle ring portion is an annular hollow mesh body, the middle ring portion comprises a plurality of axial strips, one or more carbon fiber ropes are spirally woven around the axial strips, and the angle between the axial strips and the spiral weaving direction of the carbon fiber ropes is greater than 70 degrees and smaller than 90 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011129239.0A CN112195508A (en) | 2020-10-21 | 2020-10-21 | Integrally woven crucible preform with bottom hole and coated crucible made of same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011129239.0A CN112195508A (en) | 2020-10-21 | 2020-10-21 | Integrally woven crucible preform with bottom hole and coated crucible made of same |
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| CN113121254A (en) * | 2021-04-19 | 2021-07-16 | 福建康碳复合材料科技有限公司 | Preparation method of large-size R-angle crucible preform |
| WO2024082663A1 (en) * | 2022-10-20 | 2024-04-25 | 上海骐杰碳素材料有限公司 | Combined crucible and single crystal furnace using same |
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