CN206318711U - Corundum graphite composite crucible - Google Patents
Corundum graphite composite crucible Download PDFInfo
- Publication number
- CN206318711U CN206318711U CN201621373327.4U CN201621373327U CN206318711U CN 206318711 U CN206318711 U CN 206318711U CN 201621373327 U CN201621373327 U CN 201621373327U CN 206318711 U CN206318711 U CN 206318711U
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- China
- Prior art keywords
- crucible
- corundum
- graphite
- sidewall
- sealant
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Abstract
The utility model is a kind of corundum graphite composite crucible, is corundum sealant, graphite linings, graphite blanket layer, corundum sealant respectively inside-out on sidewall of crucible.And there was only corundum layer in crucible bottom.Graphite linings leave gap between being radially divided into 2 to 8 pieces, every piece.Water-cooled hot-wire coil is wound with the outside of sidewall of crucible.The utility model induces vortex using alternating electromagnetic field in graphite linings, huge Joule heat is produced, so as to heat silicon material.Temperature in use can reach more than 1650 DEG C, and graphite linings and graphite blanket layer are closed by corundum sealant, and its oxidization burning loss speed is slow down significantly, service life is improved.The sidewall of crucible at silicon liquid level is avoided the very big temperature difference occur, it is therefore prevented that thermal stress makes the problem of crucible is cracked, and further increases service life.
Description
Technical field
The utility model belongs to one kind and utilizes corundum -- the crucible for purifying polycrystalline silicon that graphite composite material is made.
Background technology
At present, in the technique that Physical produces solar-grade polysilicon, an important link is exactly to utilize slag practice
Nonmetallic inclusion is removed, phosphorus, boron etc. is primarily referred to as.Its main processes is exactly to utilize the silicon in intermediate frequency furnace fusion crucible
Material, then adds slag former in the silicon liquid of fusing, after blowing, stirring, clarify, most phosphorus, boron among silicon liquid
It is transferred in slag and is removed Deng nonmetallic inclusion.In this technical process, the speed of fusing silicon material how is improved, is improved
The service life of expensive crucible, is always an important research topic in industry.
In existing technical scheme, firing equipment is intermediate frequency furnace, and the crucible of fusing silicon material uses common corundum crucible,
The silicon liquid induced inside in crucible is gone out vortex using electromagnetic induction principle, silicon liquid is heated by way of Joule heat.
There is following major defect in existing technical scheme：
First, silicon only has just good conductive capability in the liquid state, and conductive capability is excessively poor in the case of solid-state, is opening
When beginning to melt silicon material, the silicon material in crucible is in solid block, and internal vortex is very small, silico briquette heating can not at all reached molten
Point temperature.And in the case of with common corundum crucible, corundum crucible is non-conductive, so will not also generate heat.Solution is
While block silicon material is added, a graphite rod is also put into corundum crucible, the vortex induced using graphite rod is produced
Joule heat makes after melting silicon materials, further takes out graphite rod.The defect of this method be graphite rod the efficiency of heating surface is low, the material time
Long, the power consumption for melting silicon material is big, and graphite rod has pollution to silicon material.
2nd, in order to avoid above mentioned problem, second of method is proposed again, i.e., when pouring out silicon liquid, be not finished down all, in crucible
The silicon liquid of bottom surplus about 1/3rd, adds new silico briquette, and doing for substantial amounts of Joule heat can be produced using silicon liquid conduction
Method continues material.But now, there is the high temperature that silicon liquid is also at the crucible of silicon liquid part, without silicon liquid partially due to earthenware
Crucible itself does not generate heat, sharp temperature drop, and the very big temperature difference occurs in the sidewall of crucible at silicon liquid level, and its thermal stress easily produces crucible
Raw crackle, the service life of serious curtailment common corundum crucible.
The content of the invention
The purpose of this utility model is to provide a kind of easy to use, long lifespan, pollution will not be produced to silicon material
Corundum-graphite composite crucible, to eliminate the defect of above-mentioned existing product.
The utility model realizes its purpose using following technical proposal：
A kind of corundum-graphite composite crucible, is a tubular crucible with the end being made up of corundum sealant；In sidewall of crucible
In, the circle graphite linings and graphite blanket layer being close together are provided with inside-out, and graphite linings and graphite blanket layer are sealed in earthenware
In crucible wall；Sidewall of crucible then forms the interlayer sealing of corundum sealant, graphite linings, graphite blanket layer and corundum sealant inside-out
Structure, and crucible bottom is still only corundum sealant；Water-cooled hot-wire coil is wound with the outside of described sidewall of crucible.
The thickness range of described sidewall of crucible：35-150mm.
The thickness range of graphite linings：5-40mm.
The thickness range of graphite blanket layer：10-35mm.
Graphite linings, which are divided between 2 to 8 pieces, every piece, leaves gap.
Using effect of the present utility model is：
The utility model corundum -- graphite composite crucible, vortex is induced using alternating electromagnetic field in graphite linings, is produced
Huge Joule heat, so as to heat silicon material, temperature in use can reach more than 1650 DEG C, and graphite linings and graphite blanket layer are close by corundum
Sealing is closed, and its oxidization burning loss speed, long service life is slow down significantly.Because sidewall of crucible all generates heat, it is to avoid in silicon liquid level
There is the very big temperature difference in the sidewall of crucible at place, it is therefore prevented that thermal stress makes the problem of crucible is cracked, and further increases and uses the longevity
Life.
Brief description of the drawings
Fig. 1 the utility model is corundum-graphite composite crucible structural representation,
Fig. 2 is graphite linings radially piecemeal schematic diagram.
Marked in figure：Corundum sealant 1, graphite blanket layer 2, graphite linings 3, water-cooled hot-wire coil 4, gap 5.
Embodiment
Referring to Fig. 1 and Fig. 2, a kind of corundum-graphite composite crucible is a tubular with the end being made up of corundum sealant 1
Crucible.In sidewall of crucible, the circle graphite linings 3 being close together and graphite blanket layer 2, graphite linings 3 and stone are provided with inside-out
Black blanket layer 2 is sealed in sidewall of crucible.So, sidewall of crucible then forms corundum sealant 1, graphite linings 3, graphite blanket layer inside-out
2 and the interlayer sealing structure of corundum sealant 1, and crucible bottom is still only corundum sealant 1.
This corundum-graphite composite crucible, the alundum (Al2O3) content of corundum answers ＞ 99%；Graphite is carbon containing in graphite linings 3
Amount answers ＞ 99.99%；Phosphorus content answers ＞ 99% in graphite blanket layer 2, and ash content answers ＜ 99%；The corundum-graphite composite crucible is used
Injection forming is manufactured, vacuum-sintering shaping.The thickness range of described sidewall of crucible：35-150mm, the thickness range of graphite linings 3：
5-40mm, the thickness range of graphite blanket layer 2：10-35mm.Graphite linings 3, which are divided between 2 to 8 pieces, every piece, leaves gap 5, such as Fig. 2
It is shown.
Water-cooled hot-wire coil 4 is wound with the outside of sidewall of crucible, will be in graphite when water-cooled hot-wire coil 4 is by alternating current
Alternating electromagnetic field is produced in layer 3, graphite linings 3 are internal in the presence of alternating electromagnetic field to produce vortex, then produces Joule heat, right
The water flowing that silicon material plays inside heating fusing effect, water-cooled hot-wire coil 4 is to be allowed to cool.One layer of graphite in the outside of graphite linings 3
Blanket layer 2, its effect is：Because graphite linings 3 are different with the thermal coefficient of expansion of corundum sealant 3, if not taking certain arrange
Apply, at high temperature, their change in size is inconsistent, can cause the cracking of corundum sealant 3, so that it is multiple to shorten corundum-graphite
Close the service life of crucible.Graphite blanket layer 2 also acts heat insulating function simultaneously, prevents that the heat that graphite linings 3 are produced is largely outside
Spread side.Graphite linings 3 and graphite blanket layer 2 are thoroughly sealed by corundum sealant 3, have been completely cut off the air in the external world, have been prevented at high temperature
Graphite linings 3 and graphite blanket layer 2 are oxidized.Graphite linings 3 leave gap 5 between being divided into 2 to 8 pieces, every piece in itself, its effect is：
Because graphite linings 3 itself can also expand at high temperature, if without expansion clearance, in the presence of thermal stress, graphite linings 3 can be broken
Split, the produced problem that expands with heat and contract with cold is avoided after leaving gap 5.The bottom of corundum-graphite composite crucible seam need not be heated,
Whole crucible and silicon material weight are born again therefore all make corundum sealant 1 to increase intensity by it.
Claims (5)
1. a kind of corundum-graphite composite crucible, is a tubular crucible with the end being made up of corundum sealant (1)；Its feature exists
In：In sidewall of crucible, the circle graphite linings (3) and graphite blanket layer (2) being close together, graphite linings (3) are provided with inside-out
It is sealed in graphite blanket layer (2) in sidewall of crucible；Sidewall of crucible then form inside-out corundum sealant (1), graphite linings (3),
The interlayer sealing structure of graphite blanket layer (2) and corundum sealant (1), and crucible bottom is still only corundum sealant (1)；Described
Water-cooled hot-wire coil (4) is wound with the outside of sidewall of crucible.
2. corundum according to claim 1-graphite composite crucible, it is characterised in that：The thickness range of described sidewall of crucible：
35-150mm。
3. corundum according to claim 1-graphite composite crucible, it is characterised in that：The thickness range of graphite linings (3)：5-
40mm。
4. corundum according to claim 1-graphite composite crucible, it is characterised in that：The thickness range of graphite blanket layer (2)：
10-35mm。
5. corundum-graphite composite crucible according to claim 1 or 3, it is characterised in that：Graphite linings (3) are divided into 2 to 8 pieces,
Gap (5) is left between every piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621373327.4U CN206318711U (en) | 2016-12-15 | 2016-12-15 | Corundum graphite composite crucible |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621373327.4U CN206318711U (en) | 2016-12-15 | 2016-12-15 | Corundum graphite composite crucible |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206318711U true CN206318711U (en) | 2017-07-11 |
Family
ID=59267376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621373327.4U Expired - Fee Related CN206318711U (en) | 2016-12-15 | 2016-12-15 | Corundum graphite composite crucible |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206318711U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109970458A (en) * | 2017-12-28 | 2019-07-05 | 蓝星硅材料有限公司 | A kind of modified carbonaceous chute and preparation method thereof |
| CN112210676A (en) * | 2020-10-19 | 2021-01-12 | 重庆国际复合材料股份有限公司 | Electromagnetic induction heating composite crucible |
| CN113088869A (en) * | 2021-03-31 | 2021-07-09 | 哈尔滨化兴软控科技有限公司 | Preparation method of tantalum carbide sheet |
-
2016
- 2016-12-15 CN CN201621373327.4U patent/CN206318711U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109970458A (en) * | 2017-12-28 | 2019-07-05 | 蓝星硅材料有限公司 | A kind of modified carbonaceous chute and preparation method thereof |
| CN112210676A (en) * | 2020-10-19 | 2021-01-12 | 重庆国际复合材料股份有限公司 | Electromagnetic induction heating composite crucible |
| CN113088869A (en) * | 2021-03-31 | 2021-07-09 | 哈尔滨化兴软控科技有限公司 | Preparation method of tantalum carbide sheet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170711 Termination date: 20181215 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |