CN111442646A - Double crucible - Google Patents
Double crucible Download PDFInfo
- Publication number
- CN111442646A CN111442646A CN201910041405.2A CN201910041405A CN111442646A CN 111442646 A CN111442646 A CN 111442646A CN 201910041405 A CN201910041405 A CN 201910041405A CN 111442646 A CN111442646 A CN 111442646A
- Authority
- CN
- China
- Prior art keywords
- crucible
- crucible body
- inner crucible
- hole
- double
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/10—Crucibles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention provides a double crucible, and relates to the technical field of solar photovoltaics. The double crucible includes: outer crucible and interior crucible, outer crucible with the concentric suit setting of interior crucible, outer crucible is located the outside of interior crucible, interior crucible includes: an inner crucible body; the inner crucible body is provided with a through hole which axially penetrates through two ends of the inner crucible body; the outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends. The inner crucible and the outer crucible are concentrically sleeved, so that the influence of centrifugal force on the inner crucible and the outer crucible is reduced; the outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends, and each point on the outer wall of the inner crucible generates component force towards the inside of the inner crucible under the action of intermolecular action, so that the centrifugal force applied to the point by the inner crucible can be completely or partially counteracted, and the outward deformation of the inner crucible can be avoided; the outer diameters of the two ends of the inner crucible are large, the stability of the inner crucible is good, and the inner crucible is not easy to topple or overturn in the molten silicon.
Description
Technical Field
The invention relates to the technical field of solar photovoltaics, in particular to a double crucible.
Background
Single crystal silicon is the main raw material of crystalline silicon batteries, and a common production process of single crystal silicon is the czochralski method. The production process is roughly as follows: loading, melting, seeding, shouldering, equalizing diameter, ending and the like. The material melting time accounts for about 30% of the whole production process, the time is long, the continuous crystal pulling is usually to feed and melt the materials in the process of constant diameter, and the process preparation time can be reduced to a certain extent.
At present, in the continuous crystal pulling process, two crucibles, namely an inner crucible and an outer crucible, are generally used, a support body is arranged outside the outer crucible, and silicon liquid is filled between the inner crucible and the outer crucible, so that the support body is not arranged outside the inner crucible. As shown in FIG. 1, FIG. 1 shows a schematic view of a prior art inner crucible, which is currently generally hollow and cylindrical.
The inventor finds that the prior art proposal has the following disadvantages in the process of studying the prior art: because the outer part of the inner crucible is not supported, the inner crucible is easy to deform outwards due to the influence of high-temperature softening and rotating action in the crystal pulling process, and normal crystal pulling is influenced.
Disclosure of Invention
The invention provides an inner crucible, aiming at solving the problem that the inner crucible is easy to deform outwards.
The embodiment of the invention provides a double crucible, which comprises: outer crucible and interior crucible, outer crucible with the concentric suit setting of interior crucible, outer crucible is located the outside of interior crucible, interior crucible includes: an inner crucible body;
the inner crucible body is provided with a through hole which axially penetrates through two ends of the inner crucible body;
the outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends.
Optionally, the inner crucible body comprises a first crucible body and a second crucible body which are sequentially arranged, and the inner crucible body is integrally formed or formed by connecting the first crucible body and the second crucible body;
the outer diameter of the first crucible body is increased from the axial middle part of the inner crucible body to one end, and the outer diameter of the second crucible body is increased from the axial middle part of the inner crucible body to the other end;
the first crucible body is provided with a first through hole which penetrates through two ends of the first crucible body along the axial direction, the second crucible body is provided with a second through hole which penetrates through two ends of the second crucible body along the axial direction, and the second through hole is communicated with the first through hole to form a through hole of the inner crucible body.
Optionally, the first crucible body and the second crucible body are both in a truncated cone shape.
Optionally, the side surface of the first crucible body is an inwards concave or outwards convex curved surface.
The side surface of the second crucible body is a concave or convex curved surface.
Optionally, the shape and size of the first crucible body and the second crucible body are the same.
Optionally, the inner crucible body is provided with at least one connecting through hole, and the at least one connecting through hole is arranged at the position, close to the joint of the first crucible body and the second crucible body, in the axial direction of the inner crucible body and surrounds the central axis of the inner crucible body to be uniformly distributed.
Optionally, the aperture of the connecting through hole is smaller than or equal to the aperture threshold range.
Optionally, outer crucible has lateral wall and diapire that is connected, the lateral wall with interior crucible coaxial arrangement, interior crucible is located in lateral wall and diapire enclose synthetic space, and bear in on the diapire, at least one connect the via hole set up in being close to the first crucible body of diapire.
Optionally, the inner crucible body has the same wall thickness along the axial direction of the inner crucible body.
Optionally, the through holes of the inner crucible body have the same diameter along the axial direction of the inner crucible body.
In an embodiment of the present invention, a double crucible includes: the crucible comprises an outer crucible and an inner crucible, wherein the outer crucible and the inner crucible are concentrically sleeved, and the outer crucible is positioned on the outer side of the inner crucible. The inner crucible includes: an inner crucible body; the inner crucible body is provided with a through hole which axially penetrates through two ends of the inner crucible body; the outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends. In the embodiment of the invention, the outer crucible and the inner crucible are concentrically sleeved, so that the influence of the rotating centrifugal force on the inner crucible and the outer crucible in the crystal pulling process can be reduced, and the crystal pulling is facilitated. The outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends, and because each point on the outer wall of the inner crucible can generate component force towards the inside of the inner crucible under the action of intermolecular action, the centrifugal force applied to the point of the inner crucible can be completely offset or partially offset, the outward deformation of the inner crucible caused by the influence of high-temperature softening and the centrifugal force of the inner crucible in the crystal pulling process can be inhibited, and the normal continuous crystal pulling is ensured. Meanwhile, the outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends, namely the outer diameters of the two ends of the inner crucible are large, so that the stability of the inner crucible can be increased to a certain extent, the inner crucible is not easy to topple or topple in molten silicon, and the normal continuous crystal pulling is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 shows a schematic view of the structure of an inner crucible in the prior art;
FIG. 2 is a schematic structural diagram of a double crucible in the first embodiment of the invention;
FIG. 3 is a schematic view of an inner crucible according to a first embodiment of the present invention;
FIG. 4 is a schematic view showing the force applied to an inner crucible according to a first embodiment of the present invention;
FIG. 5 is a schematic view showing the force applied to an inner crucible according to a first embodiment of the present invention;
FIG. 6 shows a schematic cross-sectional view of an inner crucible in accordance with a first embodiment of the present invention;
FIG. 7 is a schematic view showing the structure of a first inner crucible in a second embodiment of the present invention;
FIG. 8 is a schematic view showing the structure of a second inner crucible in the second embodiment of the present invention;
FIG. 9 is a schematic view showing the structure of a third inner crucible in the second embodiment of the present invention;
FIG. 10 is a schematic view showing the structure of a fourth inner crucible in the second embodiment of the present invention;
FIG. 11 is a schematic structural view of a double crucible in the second embodiment of the present invention;
FIG. 12 is a schematic cross-sectional view of an inner crucible in a second embodiment of the present invention.
Description of the figure numbering:
100-inner crucible, 200-outer crucible, 101-inner crucible through hole, 102-inner crucible body at a half of the height along the central axis, 103-both ends of the inner crucible body, 11-a point on the outer wall of the inner crucible, 104-first crucible body, 105-second crucible body, 1041-one end of the first crucible body, 1051-one end of the second crucible body, 1011-first through hole of the first crucible body, 1012-second through hole of the second crucible body, 1042-side of the first crucible body, 1052-side of the second crucible body, 106-connecting through hole of the inner crucible body, 107-joint of the first crucible body and the second crucible body, 201-side wall of the outer crucible, 202-bottom wall of the outer crucible.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 invention.
Example one
Referring to fig. 2, fig. 2 shows a schematic structural view of a double crucible in the first embodiment of the present invention, the double crucible may include an inner crucible 100 and an outer crucible 200, the outer crucible 200 and the inner crucible 100 are concentrically nested, the outer crucible 200 is located outside the inner crucible 100, referring to fig. 3, fig. 3 shows a schematic structural view of an inner crucible in the first embodiment of the present invention, and the inner crucible 100 may include an inner crucible body. The inner crucible body is provided with a through hole 101 which penetrates through two ends of the inner crucible body along the axial direction; the outer diameter of the inner crucible body increases from the axial middle portion 102 of the inner crucible body to both ends.
Specifically, referring to FIG. 2, the double crucible may comprise an inner crucible 100 and an outer crucible 200, and the outer crucible 200 and the inner crucible 100 are concentrically sleeved to reduce the influence of the rotating centrifugal force on the inner crucible 100 and the outer crucible 200 during the crystal pulling process, thereby facilitating the crystal pulling. The outer crucible 200 is located outside the inner crucible 100. Referring to FIG. 3, FIG. 3 shows a schematic view of the structure of an inner crucible in accordance with one embodiment of the present invention, the inner crucible body has through holes 101, 102 extending axially through both ends of the inner crucible body at about half the height of the inner crucible body in the axial direction of the center. FIG. 4 shows a force diagram of an inner crucible according to a first embodiment of the present invention, wherein 103 in FIG. 4 is indicated as both ends of the inner crucible body, and the outer diameter of the inner crucible body increases from the middle portion 102 of the inner crucible body in the axial direction toward both ends 103 of the inner crucible body, i.e., R1 > R4, R4 > R3, and R2 > R4 in FIG. 3.
Referring to FIG. 4, the point 11 on the outer wall of the inner crucible 100 is subjected to forces in three directions, f1 is the intermolecular force at the point 11 on the outer wall of the inner crucible 100, f2 is the gravitational force at the point 11 on the outer wall of the inner crucible 100, and f3 is the centrifugal force at the point 11 on the outer wall of the inner crucible 100.
Referring to FIG. 5, FIG. 5 is a schematic view showing the stress of the inner crucible in the first embodiment of the present invention, after the intermolecular force f1 applied to the outer wall of the inner crucible 100 at the point 11 is decomposed, a component force f11 directed toward the inside of the inner crucible 100 is obtained, and the centrifugal force f3 applied to the outer wall of the inner crucible 100 at the point 11 can be completely or partially offset, so that the high temperature softening and the centrifugal force f3 of the inner crucible 100 can be suppressed during the pulling process, the outward deformation of the inner crucible 100 can be avoided, and the normal continuous pulling process can be ensured.
As shown in FIG. 5, the decomposition of the intermolecular force f1 applied to the outer wall of the inner crucible 100 at point 11 also results in a vertically downward component f12, which component f12, together with the aforementioned gravity f2, prevents the inner crucible 100 from tipping over or tipping over during the continuous pulling process, ensuring the proper progress of the continuous pulling.
In an embodiment of the present invention, optionally, referring to FIG. 2, in order to avoid the inner crucible 100 from tipping or falling over during the continuous crystal pulling process, the outer diameter of the end of the inner crucible 100 contacting the bottom wall of the outer crucible 200 may be made equal to or greater than the outer diameter of the end of the inner crucible 100 remote from the bottom wall of the outer crucible 200. In the embodiment of the present invention, this is not particularly limited.
Referring to FIG. 6, FIG. 6 shows a cross-sectional view of an inner crucible in accordance with a first embodiment of the present invention, 103 can be the ends of the inner crucible body.
In the embodiment of the invention, the outer diameter of the inner crucible body is increased from the middle part of the inner crucible body in the axial direction to the two ends of the inner crucible body. Further, the outer diameter of the inner crucible 100 at both ends 103 can be ensured to be large, so that the stability of the inner crucible 100 can be increased to a certain extent, and the inner crucible is not easy to topple or overturn in the molten silicon, thereby ensuring the normal continuous crystal pulling.
In an embodiment of the present invention, a double crucible includes: outer crucible and interior crucible, outer crucible with the concentric suit setting of interior crucible, outer crucible is located the outside of interior crucible, interior crucible includes: an inner crucible body; the inner crucible body is provided with a through hole which axially penetrates through two ends of the inner crucible body; the outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends. In the embodiment of the invention, the outer crucible and the inner crucible are concentrically sleeved, so that the influence of the rotating centrifugal force on the inner crucible and the outer crucible in the crystal pulling process can be reduced, and the crystal pulling is facilitated. The outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends, and because each point on the outer wall of the inner crucible can generate component force towards the inside of the inner crucible under the action of intermolecular action, the component force can completely offset or partially offset the centrifugal force applied to the point by the inner crucible, thereby inhibiting the deformation of the inner crucible caused by the high-temperature softening and the centrifugal force of the inner crucible in the crystal pulling process, and ensuring the normal continuous crystal pulling. Meanwhile, the outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends, namely the outer diameters of the two ends of the inner crucible are large, so that the stability of the inner crucible can be increased to a certain extent, the inner crucible is not easy to topple or overturn in molten silicon, and the normal operation of continuous crystal pulling is ensured.
Example two
Referring to FIG. 7, FIG. 7 shows a schematic structural view of a first inner crucible in a second embodiment of the present invention, the inner crucible 100 comprising an inner crucible body. The inner crucible body may include a first crucible body 104 and a second crucible body 105 which are sequentially disposed. The inner crucible body is integrally formed, or is formed by connecting the first crucible body 104 and the second crucible body 105.
The outer diameter of the first crucible body 104 increases from the middle portion 102 of the inner crucible body in the axial direction toward the one end 1041. The outer diameter of the second crucible body 105 increases from the middle portion 102 of the inner crucible body in the axial direction toward the other end 1051.
The first crucible body 104 is provided with a first through hole 1011 which axially penetrates through two ends of the first crucible body, the second crucible body 105 is provided with a second through hole 1012 which axially penetrates through two ends of the second crucible body, and the second through hole 1012 is communicated with the first through hole 1011 to form the through hole 101 of the inner crucible body.
Specifically, referring to fig. 7, the inner crucible body may include a first crucible body 104 and a second crucible body 105 which are sequentially disposed. The inner crucible body is integrally formed, or is formed by connecting the first crucible body 104 and the second crucible body 105. For example, the inner crucible body may be formed by welding the first and second crucible bodies 104, 105, etc. In the embodiment of the present invention, this is not particularly limited.
The outer diameter of the first crucible body 104 is increased from the middle part 102 of the inner crucible body in the axial direction to one end 1041, and the outer diameter of the second crucible body 105 is increased from the middle part 102 of the inner crucible body in the axial direction to the other end 1051. Specifically, R5 > R6, the outer diameter of the first crucible body 104, from the corresponding outer diameter R6 of the axially intermediate portion 102 of the inner crucible body to the outer diameter R5 of one end of the first crucible body 104, increases; r8 > R7, and the outer diameter of the second crucible body 105 increases from the outer diameter R7 corresponding to the axially middle portion 102 of the inner crucible body to the outer diameter R8 at one end of the second crucible body 105.
In an embodiment of the present invention, referring to FIG. 7, the first crucible body 104 has a first through hole 1011 extending axially through both ends thereof, the second crucible body 105 has a second through hole 1012 extending axially through both ends thereof, and the second through hole 1012 communicates with the first through hole 1011 to form the through hole 101 of the inner crucible body.
In the embodiment of the present invention, the inner crucible body includes the first crucible body 104 and the second crucible body 105 which are sequentially arranged, and the inner crucible 100 is obtained by connecting the first crucible body 104 and the second crucible body 105, so as to facilitate the processing and manufacturing and improve the processing yield.
In the embodiment of the present invention, the first and second crucible bodies 104 and 105 may be the same or different in size and shape, and are not particularly limited in the embodiment of the present invention.
In an embodiment of the present invention, referring to fig. 7, the first crucible body 104 and the second crucible body 105 may be both in the shape of a circular truncated cone. Specifically, referring to fig. 7, the outer diameter of the first crucible body 104 can be linearly increased from R6 to R5, and the first crucible body 104 can be in the shape of a circular truncated cone. The outer diameter of the second crucible body 105 can be linearly increased from R7 to R8, and then the second crucible body 105 can also be in the shape of a circular truncated cone.
In the embodiment of the invention, the first crucible body 104 and the second crucible body 105 can be both in the shape of a circular truncated cone, so that the processing is convenient, the processing efficiency is improved, and the yield is also improved.
In the embodiment of the present invention, the shapes and sizes of the first crucible body 104 and the second crucible body 105 may be the same or different, and are not particularly limited in the embodiment of the present invention.
Referring to fig. 8 and fig. 8, which are schematic structural views illustrating a second inner crucible according to a second embodiment of the present invention, the side 1042 of the first crucible body 104 may be a concave curved surface, and the side 1052 of the second crucible body 105 may be a concave curved surface.
Referring to fig. 9, fig. 9 is a schematic structural view of a third inner crucible according to the second embodiment of the present invention, in which the side 1042 of the first crucible body 104 may be a convex curved surface, and the side 1052 of the second crucible body 105 may be a convex curved surface.
In the embodiment of the invention, the side surface of the first crucible body is an inwards concave or outwards convex curved surface, and the side surface of the second crucible body is an inwards concave or outwards convex curved surface, so that the side surfaces of the first crucible body or the second crucible body are more smooth, the influence of high-temperature softening on the side surfaces and the centrifugal force of the inner crucible can be favorably reduced, and the outward deformation of the inner crucible can be favorably reduced.
Referring to FIG. 7, in an embodiment of the present invention, the first crucible body 104 and the second crucible body 105 may have the same shape and size. That is, in fig. 7, the first crucible body 104 and the second crucible body 105 may have the same shape and size, and for example, R5 ═ R8 and R6 ═ R7, the height H1 of the first crucible body 104 and the height H2 of the second crucible body 105 are the same, and the rate of increase from R6 to R5 is the same as the rate of increase from R7 to R8.
In an embodiment of the present invention, the first crucible body and the second crucible body have the same shape and size. Thereby ensuring the stability of the inner crucible, preventing the inner crucible from toppling or overturning in the molten silicon and ensuring the normal continuous crystal pulling. Simultaneously, above-mentioned first crucible body and above-mentioned second crucible body shape and size homogeneous phase are the same, only need a mould can process and obtain above-mentioned first crucible body and above-mentioned second crucible body, and processing is convenient, and low in production cost.
Referring to FIG. 10, FIG. 10 is a schematic view showing the structure of a fourth inner crucible of the second embodiment of the present invention, which has at least one communicating through-hole 106, wherein the at least one communicating through-hole 106 is located at a position close to the joint 107 of the first crucible body 104 and the second crucible body 105 in the axial direction of the inner crucible body and is uniformly distributed around the central axis of the inner crucible body.
Specifically, referring to FIG. 10, the inner crucible body has at least one connecting through hole 106, for example, 2 connecting through holes, 8 connecting through holes, etc., and the number of the connecting through holes can be set according to actual needs. In the embodiment of the present invention, this is not particularly limited.
In the embodiment of the present invention, referring to FIG. 10, the at least one communicating through-hole 106 is located near the junction 107 between the first crucible body 104 and the second crucible body 105 in the axial direction of the inner crucible body and is uniformly distributed around the central axis of the inner crucible body, so that the molten silicon can uniformly and smoothly enter the inner crucible body through the communicating through-hole 106. Therefore, the eddy current generated by the silicon melt entering or flowing out of the inner crucible through each connecting through hole 106 is small and uniform, and the crystal pulling cannot be interfered.
In the embodiment of the present invention, referring to fig. 10, the aperture of the connecting through hole 106 is smaller than or equal to the aperture threshold range. Specifically, the range of the aperture threshold may be set according to actual needs, and the aperture may be the diameter of the connection hole, for example, referring to fig. 10, the diameter of the connection through hole 106 may be 2mm or less.
In the embodiment of the present invention, the aperture of the connecting through hole 106 is smaller than or equal to the aperture threshold range, and the eddy current generated by the molten silicon entering or flowing out of the inner crucible 100 through the connecting through hole 106 is small, so that the interference to the crystal pulling is avoided, and the requirement of flowing the molten silicon into the inner crucible 100 in the continuous crystal pulling process can be satisfied.
In the embodiment of the present invention, referring to fig. 11, fig. 11 shows a schematic structural view of a double crucible in the second embodiment of the present invention, an outer crucible 200 has a sidewall 201 and a bottom wall 202 connected to each other, the sidewall 201 is disposed coaxially with the inner crucible 100, the inner crucible 100 is disposed in a space enclosed by the sidewall 201 and the bottom wall 202 and supported on the bottom wall 202, and the at least one connecting through hole 106 is opened in a first crucible body close to the bottom wall 202.
Specifically, referring to fig. 11, the inner crucible 100 is located in a space enclosed by the side wall 201 and the bottom wall 202 and is supported on the bottom wall 202, the pulling region is located in a region of the inner crucible 100 away from the bottom wall 202, the at least one connecting through hole 106 enters or flows out of the vortex generated by the silicon melt of the inner crucible 100, and the at least one connecting through hole 106 is opened in the first crucible body close to the bottom wall 202, that is, the at least one connecting through hole 106 is arranged on the first crucible body farther away from the crystallization region, so that the pulling is not greatly influenced due to the farther away from the crystallization region, and the pulling is facilitated; meanwhile, the impurity in the silicon melt is generally higher in density, and is close to the bottom wall 202 of the outer crucible, the connecting through hole 106 is arranged on the first crucible body close to the bottom wall 202, and the connecting through hole 106 is arranged in the region away from the preset distance of the bottom wall 202, and the preset distance is set according to actual needs, for example, the connecting through hole 106 can be arranged on the first crucible body close to the bottom wall 202. And the distance H3 from the connecting through-hole 106 to the bottom wall 202 can be 4/5 of the first crucible body height. That is, the connecting through-hole 106 is not provided in a region close to the bottom wall 202, so that impurities in the molten silicon do not enter the inner crucible 100 through the connecting through-hole 106, which is advantageous in reducing the interference of impurities during the crystal pulling process and in facilitating the crystal pulling.
In the embodiment of the present invention, referring to FIG. 6, the wall thickness of the inner crucible body is the same in the axial direction of the inner crucible body. That is, in FIG. 6, the wall thickness d1 of the inner crucible body is the same in the axial direction of the inner crucible body.
In the embodiment of the invention, the wall thickness of the inner crucible body is the same along the axial direction of the inner crucible body, so that the processing is convenient, and the stress on each part of the inner wall is uniform, thereby being convenient for crystal pulling.
In the embodiment of the present invention, in order to further increase the stability of the inner crucible 100, the wall thickness of the inner crucible body far from the bottom wall 202 of the outer crucible 200 along the axial direction of the inner crucible body can be smaller than the wall thickness of the inner crucible body near the bottom wall 202 of the outer crucible 200, so that the center of gravity of the inner crucible 100 is lower, the inner crucible 100 is not easy to topple or overturn in the molten silicon, and the normal continuous crystal pulling is ensured. In the embodiment of the present invention, this is not particularly limited.
Referring to FIG. 12, FIG. 12 shows a schematic cross-sectional view of an inner crucible of a second embodiment of the present invention, wherein the inner crucible body has a uniform through hole diameter R9 along the axial direction of the inner crucible body. And then the inner wall can be conveniently processed, and the stress on each part of the inner wall is more uniform, thereby being convenient for crystal pulling.
In an embodiment of the present invention, a double crucible includes: outer crucible and interior crucible, outer crucible with the concentric suit setting of interior crucible, outer crucible is located the outside of interior crucible, interior crucible includes: an inner crucible body; the inner crucible body is provided with a through hole which axially penetrates through two ends of the inner crucible body; the outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends. In the embodiment of the invention, the outer crucible and the inner crucible are concentrically sleeved, so that the influence of the rotating centrifugal force on the inner crucible and the outer crucible in the crystal pulling process can be reduced, and the crystal pulling is facilitated. The outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends, and because each point on the outer wall of the inner crucible can generate component force towards the inside of the inner crucible under the action of intermolecular action, the centrifugal force applied to the point of the inner crucible can be completely offset or partially offset, the outward deformation of the inner crucible caused by the influence of high-temperature softening and the centrifugal force of the inner crucible in the crystal pulling process can be inhibited, and the normal continuous crystal pulling is ensured. Meanwhile, the outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends, namely the outer diameters of the two ends of the inner crucible are large, so that the stability of the inner crucible can be increased to a certain extent, the inner crucible is not easy to topple or topple in molten silicon, and the normal continuous crystal pulling is ensured.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A double crucible, comprising: outer crucible and interior crucible, outer crucible with the concentric suit setting of interior crucible, outer crucible is located the outside of interior crucible, its characterized in that, interior crucible includes: an inner crucible body; the inner crucible body is provided with a through hole which axially penetrates through two ends of the inner crucible body;
the outer diameter of the inner crucible body is increased from the axial middle part of the inner crucible body to two ends.
2. The double crucible of claim 1, wherein the inner crucible body comprises a first crucible body and a second crucible body which are arranged in sequence, and the inner crucible body is integrally formed or formed by connecting the first crucible body and the second crucible body;
the outer diameter of the first crucible body is increased from the axial middle part of the inner crucible body to one end, and the outer diameter of the second crucible body is increased from the axial middle part of the inner crucible body to the other end;
the first crucible body is provided with a first through hole which penetrates through two ends of the first crucible body along the axial direction, the second crucible body is provided with a second through hole which penetrates through two ends of the second crucible body along the axial direction, and the second through hole is communicated with the first through hole to form a through hole of the inner crucible body.
3. The double crucible of claim 2 wherein the first crucible body and the second crucible body are each frustoconical in shape.
4. The double crucible of claim 2, wherein the side surface of the first crucible body is a curved surface which is concave or convex;
the side surface of the second crucible body is a concave or convex curved surface.
5. The double crucible of claim 2 wherein the first crucible body and the second crucible body are each the same in shape and size.
6. The double crucible of claim 2 wherein the inner crucible body has at least one communication port located axially of the inner crucible body adjacent to the junction of the first and second crucible bodies and evenly distributed about the central axis of the inner crucible body.
7. The double crucible of claim 6, wherein the connecting through hole has an aperture of less than or equal to an aperture threshold range.
8. The double crucible as claimed in claim 6 or claim 7, wherein the outer crucible has a side wall and a bottom wall connected together, the side wall is arranged coaxially with the inner crucible, the inner crucible is located in a space enclosed by the side wall and the bottom wall and supported on the bottom wall, and the at least one connecting through hole is opened in a first crucible body close to the bottom wall.
9. The double crucible as recited in claim 1, wherein the wall thickness of the inner crucible body is the same along the axial direction of the inner crucible body.
10. The double crucible as claimed in claim 1, wherein the through-holes of the inner crucible body are of the same diameter in the axial direction of the inner crucible body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910041405.2A CN111442646A (en) | 2019-01-16 | 2019-01-16 | Double crucible |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910041405.2A CN111442646A (en) | 2019-01-16 | 2019-01-16 | Double crucible |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111442646A true CN111442646A (en) | 2020-07-24 |
Family
ID=71648495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910041405.2A Pending CN111442646A (en) | 2019-01-16 | 2019-01-16 | Double crucible |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111442646A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111848134A (en) * | 2020-08-04 | 2020-10-30 | 江苏隆达超合金航材有限公司 | Crucible integrated forming manufacturing process for vacuum induction furnace |
-
2019
- 2019-01-16 CN CN201910041405.2A patent/CN111442646A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111848134A (en) * | 2020-08-04 | 2020-10-30 | 江苏隆达超合金航材有限公司 | Crucible integrated forming manufacturing process for vacuum induction furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0283903A2 (en) | Method of manufacturing quartz double crucible and method of manufacturing a silicon monocrystalline rod | |
| CN104685113A (en) | Continuous CZ method and apparatus | |
| CN111442646A (en) | Double crucible | |
| US20230340692A1 (en) | Method of Growing Ingot | |
| CN106435729A (en) | Seeding and shoulder expanding device and technique for single crystal rods and single crystal furnace | |
| CN111318703B (en) | Support structure for reducing stress deformation of SLM (selective laser melting) manufactured metal part | |
| CN1265031C (en) | Heavily doped method and doping equipment for developing silicon single-crystal straight pulled | |
| JP2004525852A (en) | EFG Crystal Growth Apparatus and Method The present invention has been made based on DOE subcontract No. ZAX-8-17647-10. | |
| JPH11255588A (en) | Apparatus for feeding single crystal raw material and feeding of single crystal raw material | |
| US6835247B2 (en) | Rod replenishment system for use in single crystal silicon production | |
| CN204982128U (en) | Increase draft tube of single crystal growing furnace inventory | |
| CN204874813U (en) | A thermal shielding device for monocrystalline silicon is grown | |
| CN107541770A (en) | A kind of feeder of monocrystalline silicon growing furnace | |
| CN107227493B (en) | Assembled crucible | |
| JP6708173B2 (en) | Recharge tube and method for manufacturing single crystal | |
| CN108406405B (en) | Cylindric part doffer one by one | |
| JP2011184227A (en) | Method for producing silicon single crystal | |
| JP2022159501A (en) | Polycrystalline silicon bar, polycrystalline silicon rod and production method of the same | |
| CN212103060U (en) | Seed crystal growth device | |
| CN214694460U (en) | Combined crucible | |
| JP2000169285A (en) | Crucible for receiving melted liquid | |
| CN217149388U (en) | Crucible with multiple melt zones | |
| CN205741273U (en) | A kind of feeder of monocrystalline silicon growing furnace | |
| CN214060709U (en) | Crucible assembly | |
| CN112144107A (en) | Crystal growth furnace and crystal production process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200724 |