CN217715903U - Crucible supporting rod - Google Patents
Crucible supporting rod Download PDFInfo
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- CN217715903U CN217715903U CN202221028202.3U CN202221028202U CN217715903U CN 217715903 U CN217715903 U CN 217715903U CN 202221028202 U CN202221028202 U CN 202221028202U CN 217715903 U CN217715903 U CN 217715903U
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Abstract
The application discloses crucible die-pin, this crucible die-pin includes: the carbon fiber composite rod comprises a carbon fiber composite rod, a carbon transition layer and a needled carbon composite layer, wherein the carbon transition layer is fixedly connected to the periphery of the carbon fiber composite rod, and the needled carbon composite layer covers the periphery of the carbon transition layer and is fixedly connected with the carbon transition layer; wherein the density of the carbon fiber composite rod is lower than that of the needle-punched carbon composite layer. This application forms the crucible die-pin that is close solid construction through fixed connection carbon transition layer and the acupuncture carbon composite bed in proper order in the periphery of carbon fiber composite pole to the bearing performance of reinforcing crucible die-pin has improved the mechanical properties and the life of crucible die-pin.
Description
Technical Field
The application relates to the technical field of carbon fiber composite materials, in particular to a crucible supporting rod.
Background
The crucible supporting rod is an indispensable supporting member in single crystal production equipment, is used for supporting a crucible in a single crystal furnace, and is used for being linked with the crucible.
In the prior art, a sectional type crucible supporting rod is generally adopted, wherein an upper section of the supporting rod made of graphite material and a lower section of the supporting rod made of carbon/carbon heat-insulating material are adopted. Along with the continuous promotion of the demand of single silicon crystal preparation volume, the existing sectional type crucible supporting rod is difficult to bear the total weight of the crucible and the silicon material, and the crucible supporting rod is easy to break.
Accordingly, there is a need for an improved crucible carrier rod to solve the existing problems described above.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of the prior art, the embodiment of the application provides a crucible supporting rod to solve the problems of large brittleness, low strength, difficult forming of a solid carbon/carbon composite material preform and the like of the traditional crucible supporting rod, and fill the market vacancy, and the technical scheme is as follows:
the application provides a crucible die-pin, includes: the carbon fiber composite rod, the carbon transition layer and the needling carbon composite layer;
the carbon transition layer is fixedly connected to the periphery of the carbon fiber composite rod, and the needle punching carbon composite layer covers the periphery of the carbon transition layer and is fixedly connected with the carbon transition layer; the density of the carbon fiber composite rod is lower than that of the needle-punched carbon composite layer.
Furthermore, the carbon fiber composite rod comprises carbon fiber units with various radial sizes which are adjacently arranged, and the adjacent carbon fiber units are bonded; pores are arranged in the carbon fiber units and between the adjacent carbon fiber units.
Further, the needled carbon composite layer comprises long fiber layers and short fiber layers, wherein the long fiber layers and the short fiber layers are alternately stacked.
Furthermore, the weight percentage of the long fiber layer is 20-30%, and the weight percentage of the short fiber layer is 70-80%.
Furthermore, the carbon transition layer is connected with the needling carbon composite layer in a needling way, and the needling carbon composite layer is connected with the carbon transition layer in a needling way.
Further, the carbon fiber unit comprises a plurality of skeleton carbon fiber units, and the skeleton carbon fiber units are sequentially arranged adjacently to form a skeleton structure; the hollow part of the framework structure is filled with filling carbon fiber units with various radial sizes, and the radial sizes of the filling carbon fiber units are smaller than those of the framework carbon fiber units.
Further, the axial length of each of the carbon fiber units of the plurality of radial sizes is the same.
Furthermore, the needled carbon composite layer further comprises a cone clamping portion and a crucible clamping portion, and the cone clamping portion and the crucible clamping portion are respectively arranged at two ends of the carbon fiber composite rod.
Further, the density of the carbon fiber composite rod is 0.08g/cm3-0.20g/cm3。
Further, the density of the needle punched carbon composite layer is more than or equal to 1.2g/cm3。
The application provides a crucible die-pin has following technological effect:
1. this application is through fixed connection carbon transition layer and the acupuncture carbon composite bed in proper order in carbon fiber composite pole's periphery, forms the crucible die-pin that is close solid construction to the bearing performance of reinforcing crucible die-pin avoids adding into the crucible in increasing silicon material, causes the crucible die-pin rupture.
2. The crucible support rod in the application is a carbon/carbon composite material which is close to a solid structure, the carbon/carbon composite material has the advantages of being good in size stability, good in thermal shock resistance, high in strength, long in service life and the like, and the mechanical property and the service life of the crucible support rod are remarkably improved.
3. In the crucible supporting rod disclosed by the application, the density of the carbon fiber composite rod is lower than that of the needling carbon composite layer, so that the weight of the crucible supporting rod is reduced, and the preparation cost is reduced.
4. The crucible die-pin in this application's simple structure, the mass production of being convenient for.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of a crucible supporting rod provided in an embodiment of the present application;
FIG. 2 is a cross-sectional view of a crucible support rod according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural view of another crucible supporting rod provided in the embodiments of the present application;
FIG. 4 is a schematic structural diagram of a carbon fiber composite rod provided in an embodiment of the present application;
FIG. 5 is a front view of a crucible supporting rod provided in an embodiment of the present application;
wherein the reference numbers correspond to: 10-a carbon fiber composite rod; 11-carbon fiber units; 20-needling a carbon composite layer; a 30-carbon transition layer; 111-backbone carbon fiber units; 112-filled carbon fiber units; 201-cone clamping part; 202-crucible clamping part.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
An embodiment of the present invention further provides a crucible supporting rod, please refer to fig. 1-5, wherein the crucible supporting rod includes: a carbon fiber composite rod 10, a carbon transition layer 30, and a needled carbon composite layer 20.
Wherein, the carbon transition layer 30 is fixedly connected to the periphery of the carbon fiber composite rod 10, and the needle-punched carbon composite layer 20 covers the periphery of the carbon transition layer 30 and is fixedly connected with the carbon transition layer 30; the density of the carbon fiber composite rod 10 is lower than that of the needle-punched carbon composite layer 20.
Specifically, the carbon fiber composite rod 10 is of a columnar structure and is used as a core body of a subsequent crucible supporting rod, the radial diameter of the carbon fiber composite rod 10 can be 20mm-25mm, 25mm-30mm and 24mm-28mm, and preferably, the radial diameter of the carbon fiber composite rod 10 is 24mm-28mm.
This application is through fixed connection carbon transition layer and the acupuncture carbon composite bed in proper order in carbon fiber composite pole's periphery, forms the crucible die-pin that is close solid construction to the bearing performance of reinforcing crucible die-pin avoids adding into the crucible in increasing silicon material, causes the crucible die-pin rupture. In addition, the crucible supporting rod is made of carbon/carbon composite material with a solid structure, the carbon/carbon composite material has the advantages of being good in size stability, good in thermal shock resistance, high in strength, long in service life and the like, and the mechanical property and the service life of the crucible supporting rod are remarkably improved.
In one embodiment, polymer adhesive layers are disposed between the carbon transition layer 30 and the carbon fiber composite rod 10 and between the carbon transition layer 30 and the needle-punched carbon composite layer 20, and are used for achieving adhesive fixation between the carbon transition layer 30 and the carbon fiber composite rod 10 and between the carbon transition layer 30 and the needle-punched carbon composite layer 20, so as to enhance the adhesion stability between the carbon transition layer 30 and the carbon fiber composite rod 10 and the needle-punched carbon composite layer 20.
In an alternative embodiment, the carbon fiber composite rod 10 comprises carbon fiber units 11 with various radial sizes which are adjacently arranged, and the adjacent carbon fiber units 11 are bonded; pores are formed in the carbon fiber units 11 and between adjacent carbon fiber units 11.
In a specific embodiment, a polymer adhesive layer is also disposed between the carbon fiber units 11 with multiple radial dimensions, and the polymer adhesive layer is used for realizing connection between the carbon fiber units 11 with multiple radial dimensions.
In the embodiment of the present application, the carbon fiber units 11 may be carbon fiber rods, and the carbon fiber rods may include a carbon fiber tow and a wrapping material wrapped outside the carbon fiber tow, wherein a diameter of a single carbon fiber may be 7 μm to 15 μm, the wrapping material may be removed during carbonization, and a small amount of resin carbon is generated and remained on the periphery of the carbon fiber tow, and since a small amount of resin carbon is remained on the periphery of the carbon fiber tow, during densification and high temperature treatment, pores exist in each carbon fiber unit 11 and between adjacent carbon fiber units 11 to remain, so as to form the carbon fiber composite rod 10 composed of a low-density carbon/carbon composite material, which has excellent thermal insulation performance, significantly reduces an axial thermal conduction rate of the crucible supporting rod, and improves thermal insulation performance of the crucible supporting rod.
In practical applications, the radial diameter of the carbon fiber unit 11 may be 0.1mm to 15mm, and may include, but is not limited to, 15mm, 13mm, 11mm, 10mm, 8mm, 6mm, 4mm, 2mm, 1.5mm, 1mm, 0.8mm, 0.5mm, etc., and the axial length of the carbon fiber unit 11 may be 50mm to 1000mm, including, but not limited to, 50mm, 100mm, 200mm, 300mm, 400mm, 450mm, 500mm, 600mm, 700mm, 800mm, 900mm, 1000mm, etc. It should be noted that the radial diameter and the axial length may be any values within the above ranges, and are not enumerated here.
In an alternative embodiment, the polymer adhesive layer may be a polymer adhesive, the polymer adhesive may be an epoxy resin, the epoxy resin includes epichlorohydrin and bisphenol a or polyol, wherein a predetermined ratio between epichlorohydrin and bisphenol a or a predetermined ratio between epichlorohydrin and polyol is (3-4): 1, after the epichlorohydrin and bisphenol a or polyol are mixed uniformly, the epoxy chloropropane is used for brushing on the periphery of the carbon fiber unit 11 to bond the carbon fiber units 11 with different radial dimensions, based on the predetermined ratio, the bonding stability and operability of the carbon fiber unit 11 are improved, if the curing speed is higher than the predetermined ratio, the molding and combination of the carbon fiber unit 11 are difficult to realize, and if the curing speed is lower than the predetermined ratio, the stability requirement cannot be met.
In an alternative embodiment, the carbon fiber composite rod 10 has a density of 0.08g/cm3-0.20g/cm3。
In a specific embodiment, the carbon fiberThe composite rod 10 may also have a density of 0.08g/cm3-0.12g/cm3、0.12g/cm3-0.18g/cm3、0.12g/cm3-0.14g/cm3Or 0.14g/cm3-0.20g/cm3Preferably, the carbon fiber composite rod 10 has a density of 0.12g/cm3-0.18g/cm3。
In an alternative embodiment, carbon fiber unit 11 includes a plurality of skeleton carbon fiber units 111, and a plurality of skeleton carbon fiber units 111 are sequentially disposed adjacent to each other to form a skeleton structure; the hollow of the skeleton structure is filled with filling carbon fiber units 112 with various radial sizes, and the radial size of the filling carbon fiber units 112 is smaller than that of the skeleton carbon fiber units 111.
In an alternative embodiment, the axial length of each carbon fiber unit 11 of the plurality of radial dimensions of carbon fiber units 11 is the same.
Specifically, the axial length of a plurality of skeleton carbon fiber units 111 is the same, and skeleton carbon fiber units 111 are bonded adjacently in sequence to form a skeleton structure with two ends flush in the axial direction, and the skeleton structure can be a cross structure. In practical applications, referring to FIGS. 2-5, 5 skeletal carbon fiber units 111 may be provided, with the radial diameter of skeletal carbon fiber units 111 including, but not limited to, 6mm-10mm, 8mm-10mm, 9mm-11mm, and 10mm-15mm, and preferably, skeletal carbon fiber units 111 have a radial diameter of 8mm-10mm. The axial length of backbone carbon fiber unit 111 may be, but is not limited to, 700mm to 1000mm, 800mm to 1000mm, and 900mm to 1000mm, and preferably, the axial length of backbone carbon fiber unit 111 is 900mm to 1000mm.
In practical applications, the radial diameter of the carbon fiber-filled elements 112 includes, but is not limited to, one or more of 6mm, 4mm, 2mm, 1.5mm, 1mm, 0.8mm, and 0.5 mm.
Specifically, the carbon fiber filling units 112 need to be completely filled in the vacant space of the framework structure to reduce the pores among the carbon fiber units 11, so as to obtain the crucible support rod with the inner core close to the solid structure.
In some cases, the axial length of filled carbon fiber unit 112 is greater than or equal to the axial length of skeletal carbon fiber unit 111, a polymer adhesive is coated on the outer periphery of filled carbon fiber unit 112, the filled carbon fiber unit is filled into the vacant space along the axial direction of skeletal carbon fiber unit 111, and after the filling is completed, the part of filled carbon fiber unit 112 exceeding the skeletal structure is removed, so as to obtain a columnar carbon fiber bonding structure.
In other cases, the axial length of the filler carbon fiber elements 112 is less than the axial length of the skeletal carbon fiber elements.
In some embodiments, the axial lengths of the carbon fiber filling units 112 are the same, and when the carbon fiber filling units 112 are bonded to the vacant space of the framework structure, at least two carbon fiber filling layers are formed, a fault or a gap exists between adjacent carbon fiber filling layers, and a gap exists between adjacent carbon fiber filling layers 112, so that the heat conduction of the crucible supporting rod along the axial direction is blocked, the axial heat conduction rate of the crucible supporting rod is remarkably reduced, and the heat insulation performance of the crucible supporting rod is improved.
In other embodiments, the axial lengths of the carbon fiber filling units 112 are different, and after the carbon fiber filling units 112 are filled, the long and short carbon fiber filling units 112 are arranged and spliced in a staggered manner, so that a plurality of faults or gaps distributed in a staggered manner are formed in the axial direction of the carbon fiber bonding structure, the stability of the carbon fiber bonding structure is ensured, the heat conduction rate of the crucible supporting rod along the axial direction is effectively reduced, and the energy loss is reduced.
In an alternative embodiment, the density of the needled carbon composite layer 20 is greater than or equal to 1.2g/cm3Preferably, the density of the needled carbon composite layer 20 is 1.5g/cm or more3。
Specifically, the needled carbon composite layer 20 is a carbon/carbon composite structure with good dimensional stability, light weight, high strength, and good thermal shock resistance, and the density of the needled carbon composite structure can reach 1.5g/cm in the densification process3Therefore, the mechanical property of the crucible supporting rod is improved, and the service life of the crucible supporting rod is prolonged.
In an alternative embodiment, the carbon transition layer 30 is needled with the needled carbon composite layer 20, and the needled carbon composite layer 20 is needled with the carbon transition layer 30.
In an alternative embodiment, the needled carbon composite layer 20 includes long fiber layers and short fiber layers, the long fiber layers alternating with the short fiber layers in a stacked arrangement.
In this application embodiment, the carbon transition layer 30 is as the intermediate medium that connects carbon fiber composite pole 10 and acupuncture carbon composite layer 20, is favorable to compounding acupuncture carbon composite layer 20 in the periphery of carbon fiber composite pole 10 through the acupuncture of carbon transition layer 30 to avoid directly carrying out the acupuncture complex on carbon fiber composite pole 10, because the direction of running through does not have the transition layer between carbon fiber composite pole 10's the layer, and carbon fiber composite pole 10 is more hard, the acupuncture that causes breaks the needle, reduce material consumption.
Specifically, the long fiber layers and the short fiber layers are alternately stacked to enhance the strength and the thermal shock resistance of the needled carbon composite layer 20, so as to prolong the service life of the crucible support rod.
In an alternative embodiment, the weight proportion of the long fiber layer is 20% to 30% and the weight proportion of the short fiber layer is 70% to 80%.
Specifically, the long fiber layer can be carbon cloth, the short fiber layer can be a net tire, and the needling density between the long fiber layer and the short fiber layer can be 30 needles/cm2-40 needles/cm2The needling depth can be 13mm-16mm.
In an alternative embodiment, the needle-punched carbon composite layer 20 further includes a cone clamping portion 201 and a crucible clamping portion 202, and the cone clamping portion 201 and the crucible clamping portion 202 are respectively disposed at two ends of the carbon fiber composite rod 10.
In the embodiment of the present application, the crucible clamping portion 202 is clamped with the crucible to realize a load bearing effect on the crucible, and the cone clamping portion 201 can be clamped with a component in the single crystal furnace to realize transmission motions such as lifting and rotating the crucible.
In an alternative embodiment, the carbon fiber composite rod 10 is circular in radial cross-section.
In an alternative embodiment, the carbon fiber composite rod 10 is circular in radial cross-section, such that a subsequent needle-punching composite process of needle-punching a carbon composite layer (20) is performed. Specifically, the radial cross section of the carbon fiber composite rod 10 may also be provided in other shapes, such as an ellipse, without affecting ply needling.
In an alternative embodiment, the carbon transition layer 30 has a thickness of 6mm to 18mm.
In the embodiment of the present application, the thickness of the carbon transition layer 30 may also be 6mm to 10mm, 6mm to 13mm, 8mm to 16mm, 13mm to 18mm, and the like, and preferably, the thickness of the carbon transition layer 30 is 8mm to 16mm.
According to the technical scheme of the embodiment of the application, the method has the following beneficial effects:
1. this application is through fixed connection carbon transition layer and the acupuncture carbon composite bed in proper order in the periphery at the carbon fiber composite pole, forms the crucible die-pin that is close solid construction to the bearing performance of reinforcing crucible die-pin avoids in increaseing silicon material and drops into the crucible, causes the fracture of crucible die-pin.
2. The crucible support rod in the application is a carbon/carbon composite material which is close to a solid structure, the carbon/carbon composite material has the advantages of being good in size stability, good in thermal shock resistance, high in strength, long in service life and the like, and the mechanical property and the service life of the crucible support rod are remarkably improved.
3. In the crucible supporting rod disclosed by the application, the density of the carbon fiber composite rod is lower than that of the needling carbon composite layer, so that the weight of the crucible supporting rod is reduced, and the preparation cost is reduced.
4. The crucible die-pin in this application's simple structure, the mass production of being convenient for.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A crucible carrier bar, comprising: the carbon fiber composite rod comprises a carbon fiber composite rod (10), a carbon transition layer (30) and a needling carbon composite layer (20);
the carbon transition layer (30) is fixedly connected to the periphery of the carbon fiber composite rod (10), and the needling carbon composite layer (20) covers the periphery of the carbon transition layer (30) and is fixedly connected with the carbon transition layer (30); the density of the carbon fiber composite rod (10) is lower than that of the needle-punched carbon composite layer (20).
2. The crucible supporting rod as claimed in claim 1, wherein the carbon fiber composite rod (10) comprises carbon fiber units (11) with various radial sizes which are adjacently arranged, and the adjacent carbon fiber units (11) are bonded; pores are arranged in the carbon fiber units (11) and between the adjacent carbon fiber units (11).
3. The crucible holder of claim 1, wherein the needled carbon composite layer (20) comprises long fiber layers and short fiber layers, the long fiber layers and the short fiber layers being alternately stacked.
4. The crucible supporting rod as claimed in claim 3, wherein the weight ratio of the long fiber layer is 20-30% and the weight ratio of the short fiber layer is 70-80%.
5. The crucible carrier bar of claim 1, wherein the carbon transition layer (30) is needle bonded to the needled carbon composite layer (20), and the needled carbon composite layer (20) is needle bonded to the carbon transition layer (30).
6. The crucible supporting rod as claimed in claim 2, wherein the carbon fiber unit (11) comprises a plurality of skeleton carbon fiber units (111), and the skeleton carbon fiber units (111) are sequentially arranged adjacently to form a skeleton structure;
filling carbon fiber units (112) with various radial sizes are filled in the vacancy of the skeleton structure, and the radial size of each filling carbon fiber unit (112) is smaller than that of each skeleton carbon fiber unit (111).
7. The crucible holder bar according to claim 6, wherein the carbon fiber units (11) of the plurality of radial sizes have the same axial length.
8. The crucible supporting rod as claimed in claim 1, wherein the needled carbon composite layer (20) further comprises a cone clamping portion (201) and a crucible clamping portion (202), and the cone clamping portion (201) and the crucible clamping portion (202) are respectively arranged at two ends of the carbon fiber composite rod (10).
9. Crucible carrying rod according to claim 1, characterized in that the density of the carbon fiber composite rod (10) is 0.08g/cm3-0.20g/cm3。
10. Crucible pin according to claim 1, characterized in that the density of the needled carbon composite layer (20) is greater than or equal to 1.2g/cm3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221028202.3U CN217715903U (en) | 2022-04-28 | 2022-04-28 | Crucible supporting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221028202.3U CN217715903U (en) | 2022-04-28 | 2022-04-28 | Crucible supporting rod |
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| Publication Number | Publication Date |
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| CN217715903U true CN217715903U (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221028202.3U Active CN217715903U (en) | 2022-04-28 | 2022-04-28 | Crucible supporting rod |
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