CN202626346U - Novel mono-like crystal ingot furnace - Google Patents
Novel mono-like crystal ingot furnace Download PDFInfo
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- CN202626346U CN202626346U CN 201220158980 CN201220158980U CN202626346U CN 202626346 U CN202626346 U CN 202626346U CN 201220158980 CN201220158980 CN 201220158980 CN 201220158980 U CN201220158980 U CN 201220158980U CN 202626346 U CN202626346 U CN 202626346U
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Abstract
The utility model discloses a novel mono-like crystal ingot furnace comprising a furnace body, a heat-insulating cage, a heat exchange table, a graphite crucible and graphite heat pieces, wherein the heat exchange table is arranged in the heat-insulating cage, the graphite crucible is arranged on the heat exchange table, the graphite heat pieces are clamped between heat-preserving materials on the inner wall of the heat-insulating cage and the graphite crucible, heat-preserving parting strips are arranged in the heat-insulating cage, and the heat-preserving parting strips are connected with a movable framework outside the heat-insulating cage through hanging rods. The heat-preserving parting strips in the heat-insulating cage can be lifted through the movable framework which controls temperature gradients of crystal growth in different periods. The ingot furnace can ensure solid liquid interface always to be kept close to a level and in slightly protruding state, and ensures smooth growth of monocrystal.
Description
Technical field:
The utility model relates to crystal silicon manufacturing technology field, especially relates to a kind of ingot furnace that is used to cast accurate monocrystalline.
Background technology:
Along with new energy technology use increasingly extensive, to solar cell require increasingly high, efficient, high-quality, the mode of production also more and more comes into one's own cheaply.
Silicon chip of solar cell mainly includes pulling of silicon single crystal, thin film amorphous silicon, casting polycrystalline silicon, banded polysilicon, membrane polysilicon, and these crystal silicons respectively have relative merits, and present most widely used crystal silicon is pulling of silicon single crystal and casting polycrystalline silicon; Account for about 90% of solar energy electric material, compare, the transformation efficiency of silicon single crystal will be higher than polysilicon; The commercial monocrystalline silicon battery sheet turnover ratio that uses is about 18%～19%; The existing method for preparing silicon single crystal mainly is a pulling of crystals, and the silicon single crystal that this method extract is circular, and diameter is about 150～220mm; Single casting output is on the low side; And because battery sheet desired shape is square, so also need be cut into the pulling of crystals of circle square, the silicon single crystal that causes actual utilization still less.Single ingot output of polysilicon has reached 660Kg, and the rate of can cutting is about in the of 68%～70%, and in addition because its ingot casting is shaped as rectangle, so utilization ratio greatly improves, but the transformation efficiency of polysilicon has only 16%～17%.
Adopt directional solidification method to cast monocrystalline and on output and utilization ratio, greater advantage is arranged; The key of casting monocrystalline is seeding and thermal field control; Seeding is meant in the quartz crucible bottom lays block seed crystal, melted silicon partial melting seed crystal, and receive inducing of seed crystal and the process of directional long crystal.Its thermal field of existing ingot furnace generally all is a hot chamber of fixed, wants to take into account thermal field gradient, the power consumption situation in each stage, and the control of solid-liquid face is difficulty very, and the later stage power to crystal growth provides not enough especially, is necessary to improve.
The utility model content:
The purpose of the utility model is the weak point that exists to prior art and a kind of novel accurate monocrystalline ingot furnace is provided, and it can control the thermograde in long brilliant each stage, remains solid-liquid interface near level or present the state of dimpling.
For realizing above-mentioned purpose; The novel accurate monocrystalline ingot furnace of the utility model includes body of heater, heat-insulation cage, heat exchange platform, plumbago crucible and graphite heating sheet, and wherein, the heat exchange platform is positioned at heat-insulation cage; Plumbago crucible is placed on the heat exchange platform; The graphite heating sheet is clipped between the lagging material and plumbago crucible on the heat-insulation cage inwall, and heat-insulation cage inside is provided with the insulation parting bead, and the insulation parting bead links to each other with the outside removable framework of heat-insulation cage through suspension rod.
Preferred as technique scheme, described framework be fixed on the body of heater top cover on link to each other by first lifting device of servo controller control transmission.
Preferred as technique scheme, described heat-insulation cage bottom opening place also is provided with removable and realizes the heat insulation bottom board that heat-insulation cage opens and closes.
Preferred as technique scheme, described heat insulation bottom board is driven by second lifting device that is fixed on bottom of furnace body.
The beneficial effect of the utility model is: it promotes the thermograde that the inner insulation parting bead of heat-insulation cage is controlled long brilliant each stage through removable framework, can remain solid-liquid interface near level or present the dimpling state, guarantees the smooth growth of monocrystalline.
Description of drawings:
Below in conjunction with accompanying drawing the utility model is done further explanation:
Fig. 1 is the one-piece construction synoptic diagram of the utility model.
Embodiment:
See shown in Figure 1: a kind of novel accurate monocrystalline ingot furnace of the utility model mainly includes body of heater 10, heat-insulation cage 20, heat exchange platform 30, plumbago crucible 40 and graphite heating sheet 50; Wherein, Heat exchange platform 30 is positioned at heat-insulation cage 20; Plumbago crucible 40 is placed on the heat exchange platform 30, and graphite heating sheet 50 is clipped between the lagging material and plumbago crucible 40 on heat-insulation cage 20 inwalls; Heat-insulation cage 20 inside are provided with a circle insulation parting bead 60; Insulation parting bead 60 links to each other with heat-insulation cage 20 outside removable stainless steel frames 70 through four suspension rods 61 being processed by resistant to elevated temperatures metal or non-metallic material; Framework 70 be fixed on body of heater 10 top covers on link to each other by the first lifting device (not shown) of servo controller (also can be cylinder) control transmission, thereby realize being incubated the up-down of parting bead 60.In addition, heat-insulation cage 20 bottom opening places are provided with movably heat insulation bottom board 80, and heat insulation bottom board 80 is driven by second lifting device 90 that is fixed on body of heater 10 bottoms, thereby realize the switching of heat-insulation cage 20.
The principle of work of the utility model is described below in conjunction with silicon single crystal ingot casting process:
The whole ingot casting process of silicon single crystal comprises five stages: heating, fusing, long brilliant, annealing, cooling, in heating and fusing early stage, insulation parting bead 60 is in lowest order, with abundant assurance heat from crucible backplate and heat exchange platform 30 entering silicon material.When temperature in the body of heater 10 rises to more than 1400 ℃; Insulation parting bead 60 promotes; The position arrives plumbago crucible 40 base plate upper edges; Be maintained to fusing and finish, promote insulation parting bead 60 and completely cut off the heat that flows in the silicon material through heat exchange platform 30 to a great extent, protection is placed on the seed crystal of plumbago crucible 40 bottoms.After getting into the long brilliant stage, by the processing parameter of setting, through reducing heat insulation bottom board 80, reach long brilliant effect, promote the isothermal curve that insulation parting bead 60 then makes every effort to reach a dimpling, the design of two separate spaces has also guaranteed the follow-up long brilliant power of crystal.After getting into annealing stage, insulation parting bead 60 reduces as far as possible, and heat insulation bottom board 80 is kept in the center and made heat-insulation cage 20 closures, and whole silicon ingot is under the uniform thermal field environment after long brilliant completion of assurance, reduces the generation of internal stress.
The utility model is compared with other ingot furnace; Have following 2 advantages: the thermal field of (1) other ingot furnace is fixed; Can't take into account the state of long brilliant each stage solid-liquid face; And the insulation parting bead of the utility model can go up and down with the variation of long brilliant trend, and a rational temperature lateral is provided, and optimizes crystal growth.(2) other ingot furnace is fixed owing to thermal field; At annealing stage; Whole silicon ingot can't be in stable, a homogeneous temp distributional environment, perhaps need reach the effect of internal stress for more time, and the insulation parting bead of the utility model can make silicon ingot more uniform temperature up and down; Shorten annealing time greatly, thereby effectively cut down the consumption of energy.
The above is merely the preferred embodiment of the utility model, does not therefore limit the protection domain of the utility model, and every equalization of doing according to the utility model changes with modifying and all belongs in the claim that the utility model contains.
Claims (4)
1. novel accurate monocrystalline ingot furnace; Include body of heater (10), heat-insulation cage (20), heat exchange platform (30), plumbago crucible (40) and graphite heating sheet (50); Wherein, Heat exchange platform (30) is positioned at heat-insulation cage (20), and plumbago crucible (40) is placed on the heat exchange platform (30), and graphite heating sheet (50) is clipped between the lagging material and plumbago crucible (40) on heat-insulation cage (20) inwall; It is characterized in that: heat-insulation cage (20) inside is provided with insulation parting bead (60), and insulation parting bead (60) links to each other with the outside removable framework (70) of heat-insulation cage (20) through suspension rod (61).
2. novel accurate monocrystalline ingot furnace according to claim 1 is characterized in that: described framework (70) be fixed on body of heater (10) top cover on link to each other by first lifting device of servo controller control transmission.
3. novel accurate monocrystalline ingot furnace according to claim 1 and 2 is characterized in that: described heat-insulation cage (20) bottom is provided with removable and realizes the heat insulation bottom board (80) that heat-insulation cage (20) opens and closes.
4. novel accurate monocrystalline ingot furnace according to claim 3 is characterized in that: described heat insulation bottom board (80) is driven by second lifting device (90) that is fixed on body of heater (10) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220158980 CN202626346U (en) | 2012-04-13 | 2012-04-13 | Novel mono-like crystal ingot furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220158980 CN202626346U (en) | 2012-04-13 | 2012-04-13 | Novel mono-like crystal ingot furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202626346U true CN202626346U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220158980 Expired - Fee Related CN202626346U (en) | 2012-04-13 | 2012-04-13 | Novel mono-like crystal ingot furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409791A (en) * | 2013-08-01 | 2013-11-27 | 安徽大晟新能源设备科技有限公司 | Six-sided thermal field structure in thermal insulators of quasi-single crystal silicon ingot furnace |
| CN103757690A (en) * | 2014-01-22 | 2014-04-30 | 高佳太阳能股份有限公司 | Polycrystalline silicon ingot furnace |
| CN108588825A (en) * | 2018-07-06 | 2018-09-28 | 浙江精功科技股份有限公司 | A kind of moveable ingot furnace of side heater and its casting ingot process |
-
2012
- 2012-04-13 CN CN 201220158980 patent/CN202626346U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409791A (en) * | 2013-08-01 | 2013-11-27 | 安徽大晟新能源设备科技有限公司 | Six-sided thermal field structure in thermal insulators of quasi-single crystal silicon ingot furnace |
| CN103757690A (en) * | 2014-01-22 | 2014-04-30 | 高佳太阳能股份有限公司 | Polycrystalline silicon ingot furnace |
| CN108588825A (en) * | 2018-07-06 | 2018-09-28 | 浙江精功科技股份有限公司 | A kind of moveable ingot furnace of side heater and its casting ingot process |
| CN108588825B (en) * | 2018-07-06 | 2024-03-15 | 浙江精工集成科技股份有限公司 | Ingot furnace with movable side heater and ingot casting process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170308 Address after: Keqiao District of Zhejiang city in Shaoxing province 312030 Huashe Jianhu Road No. 2106 Patentee after: Zhejiang Jinggong Precision Manufacturing Co., Ltd. Address before: 312030 Zhejiang city of Shaoxing province Keqiao Jianhu Road No. 1809 Patentee before: Zhejiang Jinggong Science & Technology Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20190413 |
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| CF01 | Termination of patent right due to non-payment of annual fee |