CN107366015A - A kind of Split-type crucible graphite protective plate - Google Patents
A kind of Split-type crucible graphite protective plate Download PDFInfo
- Publication number
- CN107366015A CN107366015A CN201710647143.5A CN201710647143A CN107366015A CN 107366015 A CN107366015 A CN 107366015A CN 201710647143 A CN201710647143 A CN 201710647143A CN 107366015 A CN107366015 A CN 107366015A
- Authority
- CN
- China
- Prior art keywords
- backplate
- graphite
- sheet iron
- protective plate
- top backplate
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B28/00—Production of homogeneous polycrystalline material with defined structure
- C30B28/04—Production of homogeneous polycrystalline material with defined structure from liquids
- C30B28/06—Production of homogeneous polycrystalline material with defined structure from liquids by normal freezing or freezing under temperature gradient
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention discloses a kind of Split-type crucible graphite protective plate, including four pieces of sidepiece graphite protective plates being sequentially connected around crucible surrounding；Wherein, the sidepiece graphite protective plate includes top backplate, the sheet iron underguard being distributed up and down, and the left and right sides of top backplate, sheet iron underguard are concordant；It is affixed by some graphite screw rods between the top backplate, sheet iron underguard, and the vertical screw thread of graphite screw rod is connected through top backplate with sheet iron underguard screw top；Openwork part between the top backplate, sheet iron underguard is coated with carbon fiber flexible felt.The present invention is simple in construction, is easy to Assembly And Disassembly, cost-effective, effectively strengthens the heat-insulating property of side wall middle and upper part, the temperature homogeneity in stable long brilliant middle and later periods long crystal boundary face, and then reduces dislocation and impurity content, lifts ingot quality.
Description
Technical field
The present invention relates to a kind of Split-type crucible graphite protective plate, belong to polycrystalline silicon ingot or purifying furnace apparatus field.
Background technology
Solar energy is green regenerative energy sources, in effective utilization of solar energy, solar photovoltaic utilization be it is with fastest developing speed in recent years,
Most active research field.With the rapid development of solar cell in recent years and continuous popularization and application, market is for too
The demand of positive energy battery is increasing.Crystal silicon solar energy battery is more and more applied to energy field, wherein, silicon materials
It is the main carriers of solar photovoltaic utilization, the preparation of crystalline silicon is the basis of photovoltaic cell.
In photovoltaic field, the method production polycrystal silicon ingot using directional solidification is the method generally used.Its base
Present principles are that polycrystal silicon ingot silicon material is placed in silica crucible, is placed in thermal field system, and heating causes silicon material to melt completely
Change, reduce temperature again afterwards and realize long crystalline substance.The DEFORMATION POINTS of silica crucible is 1075 DEG C.Generally, silica crucible temperature is at 1200 DEG C
When start to soften, temperature crucible at 1700 DEG C will start to soften comprehensively.And because the fusing point of silicon is about 1420 DEG C, so
The silicon melting stage, the temperature of whole silica crucible can be more than 1420 DEG C, so silica crucible can be sent out in the melting silicon materials stage
Raw softening even deforms.Have a negative impact to prevent silica crucible softening or deformation in melting silicon materials, it is necessary to use
Crucible guard boards.The fusing point of graphite is about 3652 DEG C, has the more fusing points higher than quartz, therefore in the prior art, crucible guard boards lead to
Often it is made up of graphite.One square silica crucible needs to use at least four crucible guard boards, and four backplates stand on the wall of crucible four
Outside, be fixedly connected into a protecting frame between each other.
In directional solidification method casting polysilicon process, existing apparatus and process, solid-liquid circle during whole long crystalline substance it is expected
Face is as far as possible flat, but due to thermal field design defect, easily causes in crystal growth middle and later periods, silicon ingot middle and upper part position heat-insulating property
Reduce, the increase of border region degree of supercooling, so as to cause crystal growth direction deflection, influence ingot quality and final cell piece effect
Rate.Therefore, the defects of polycrystalline directional solidification furnace is primarily present at present includes：1st, ingot casting border region is in the grain growth middle and later periods,
Universal heat-insulating property is poor, causes grain growth direction deflection；2nd, the grain growth direction of deflection can cause impurity and dislocation to
Inside ingot spreads, and influences ingot quality；3rd, existing process regulating measure, which is difficult to ensure that, accurately controls long crystal boundary face planarization.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of Split-type crucible graphite shield
Plate, have the characteristics that it is simple in construction, be easy to Assembly And Disassembly, be cost-effective, can effectively strengthen the heat insulating ability of side wall middle and upper part
Can, the temperature homogeneity in stable long brilliant middle and later periods long crystal boundary face, and then dislocation and impurity content are reduced, lift ingot quality.
Technical scheme：To achieve the above object, the technical solution adopted by the present invention is：
A kind of Split-type crucible graphite protective plate, including four pieces of sidepiece graphite protective plates being sequentially connected around crucible surrounding；
Wherein, the sidepiece graphite protective plate includes top backplate, the sheet iron underguard being distributed up and down, and top backplate, bottom
The left and right sides of backplate are concordant；It is affixed by some graphite screw rods between the top backplate, sheet iron underguard, and graphite screw rod
Vertical screw thread is connected through top backplate with sheet iron underguard screw top；Hollow out between the top backplate, sheet iron underguard
Part is coated with carbon fiber flexible felt.
Under the demand, we are redesigned the structure of counter-lateral quadrents graphite protective plate, are classified as two up and down
Point, and be attached with graphite long bolt；After the installation of four sides, openwork part is wrapped up with graphite soft felt, and utilize fixed dress
Put to fix the frictional force of soft felt with graphite protective plate outer wall and be incubated soft felt, it is stable so as to strengthen the heat-insulating property of side wall middle and upper part
The temperature homogeneity in long brilliant middle and later periods long crystal boundary face, reduces dislocation and impurity content, lifts ingot quality.
Further, some screwed holes being vertically arranged are provided with the right edge of the top backplate, sheet iron underguard,
And the positioning hole of respective numbers and position is provided with the left of its plate face, cooperation with screwed hole after positioning hole is passed through by bolt
Realize the connection of adjacent two pieces of sidepiece graphite protective plates.Such connection is simple and convenient and solid and reliable, changes of graphite protective plate
It is higher with property, it is cost-effective.
Further, the top backplate, the thickness of sheet iron underguard are 10mm-50mm, and graphite screw rod is a diameter of
10mm-20mm, so as to ensure the bonding strength of graphite screw rod.
Further, needs, the openwork part between the top backplate, sheet iron underguard are adjusted according to actual heat-insulating property
Highly it is 100-200mm.
Further, the top backplate is highly 100mm, and its screw top hole depth is 20mm.
Beneficial effect：A kind of Split-type crucible graphite protective plate provided by the invention, relative to prior art, have following excellent
Point：1st, it is simple in construction, it is easy to Assembly And Disassembly, it is higher to change the matching of graphite protective plate, cost-effective；2nd, the sidepiece stone is passed through
The structure design of black backplate, effectively strengthens the heat-insulating property of side wall middle and upper part, and the temperature in stable long brilliant middle and later periods long crystal boundary face is equal
Even property, and then dislocation and impurity content are reduced, lift ingot quality.
Brief description of the drawings
Fig. 1 is a kind of structural representation of Split-type crucible graphite protective plate of the present invention；
Figure includes：1st, top backplate, 2, sheet iron underguard, 3, graphite screw rod.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
It is a kind of Split-type crucible graphite protective plate as shown in Figure 1, including four pieces of sidepieces being sequentially connected around crucible surrounding
Graphite protective plate；
Wherein, the sidepiece graphite protective plate includes the top backplate 1, the sheet iron underguard 2 that are distributed up and down, and top backplate 1, under
The left and right sides of portion's backplate 2 are concordant；It is affixed by some graphite screw rods 3 between the top backplate 1, sheet iron underguard 2, and stone
Black 3 vertical screw thread of screw rod is connected through top backplate 1 with the screw top of sheet iron underguard 2；The top backplate 1, sheet iron underguard 2
Between openwork part be coated with carbon fiber flexible felt.
In the present embodiment, the top backplate 1, sheet iron underguard 2 right edge on be provided with some spiral shells being vertically arranged
Pit, and the positioning hole of respective numbers and position is provided with the left of its plate face, by bolt pass through after positioning hole with screwed hole
Cooperation realize the connections of adjacent two pieces of sidepiece graphite protective plates.
In the present embodiment, the top backplate 1, the thickness of sheet iron underguard 2 are 10mm-50mm, and the diameter of graphite screw rod 3
For 10mm-20mm；Openwork part between the top backplate 1, sheet iron underguard 2 is highly 200mm；The top backplate 1 is high
Spend for 100mm, and its screw top hole depth is 20mm.
The embodiment of the present invention is as follows：
Top backplate 1 and sheet iron underguard 2 are threadedly coupled by graphite screw rod 3 during use, ensure top backplate 1, bottom shield
The left and right sides of plate 2 are concordant, while adjacent two pieces of sidepiece graphite protective plates (including top backplate 1 and sheet iron underguard 2) pass through spiral shell
Bolt, which passes through, to be realized after positioning hole with the cooperation of screwed hole and connects；After the installation of four sides, carbon fiber flexible felt is wrapped up into top backplate 1
With the openwork part between sheet iron underguard 2, and insulation is fixed to the frictional force of soft felt using fixing device and graphite protective plate outer wall
Soft felt, so as to strengthen the heat-insulating property of side wall middle and upper part, the temperature homogeneity in stable long brilliant middle and later periods long crystal boundary face, reduce dislocation
And impurity content, lift ingot quality.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. a kind of Split-type crucible graphite protective plate, it is characterised in that including four blocks of sidepiece stones being sequentially connected around crucible surrounding
Black backplate；
Wherein, the sidepiece graphite protective plate includes the top backplate (1), the sheet iron underguard (2) that are distributed up and down, and top backplate (1),
The left and right sides of sheet iron underguard (2) are concordant；Pass through some graphite screw rods between the top backplate (1), sheet iron underguard (2)
(3) it is affixed, and the vertical screw thread of graphite screw rod (3) is connected through top backplate (1) with sheet iron underguard (2) screw top；It is described
Openwork part between top backplate (1), sheet iron underguard (2) is coated with carbon fiber flexible felt.
A kind of 2. Split-type crucible graphite protective plate according to claim 1, it is characterised in that the top backplate (1), under
Some screwed holes being vertically arranged are provided with the right edge of portion's backplate (2), and respective numbers are provided with the left of its plate face
And the positioning hole of position, the company for realizing adjacent two pieces of sidepiece graphite protective plates after positioning hole with the cooperation of screwed hole is passed through by bolt
Connect.
A kind of 3. Split-type crucible graphite protective plate according to claim 1, it is characterised in that the top backplate (1), under
The thickness of portion's backplate (2) is 10mm-50mm, and a diameter of 10mm-20mm of graphite screw rod (3).
A kind of 4. Split-type crucible graphite protective plate according to claim 1, it is characterised in that the top backplate (1), under
Openwork part between portion's backplate (2) is highly 100-200mm.
5. a kind of Split-type crucible graphite protective plate according to claim 1, it is characterised in that the top backplate (1) is high
Spend for 100mm, and its screw top hole depth is 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710647143.5A CN107366015A (en) | 2017-08-01 | 2017-08-01 | A kind of Split-type crucible graphite protective plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710647143.5A CN107366015A (en) | 2017-08-01 | 2017-08-01 | A kind of Split-type crucible graphite protective plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107366015A true CN107366015A (en) | 2017-11-21 |
Family
ID=60308686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710647143.5A Pending CN107366015A (en) | 2017-08-01 | 2017-08-01 | A kind of Split-type crucible graphite protective plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107366015A (en) |
-
2017
- 2017-08-01 CN CN201710647143.5A patent/CN107366015A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171121 |