CN202626347U - Ingot furnace thermal field - Google Patents
Ingot furnace thermal field Download PDFInfo
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- CN202626347U CN202626347U CN 201220276001 CN201220276001U CN202626347U CN 202626347 U CN202626347 U CN 202626347U CN 201220276001 CN201220276001 CN 201220276001 CN 201220276001 U CN201220276001 U CN 201220276001U CN 202626347 U CN202626347 U CN 202626347U
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- crucible
- ingot furnace
- thermal field
- graphite
- side plate
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Abstract
The utility model provides an ingot furnace thermal field comprising a crucible (10), a bottom plate (20) supported at the bottom of the crucible (10), lateral plates (30) surrounding outside the crucible (10) and above the bottom plate (20), and a heat-insulation element (40) arranged between the bottom plate (20) and the lateral plates (30). The ingot furnace thermal field effectively solves the problem that the area of single crystal is small due to large temperature difference between the interior and exterior of a crucible wall of the ingot furnace thermal field in the prior art.
Description
Technical field
The utility model type of relating to monocrystalline ingot casting technology field is in particular to a kind of ingot furnace thermal field.
Background technology
At present traditional class monocrystalline technology growth section initial stage edge interface is protruding serious, and most of crystal is nucleation at first herein because the mistake of sidewall of crucible is cold, causes producing polycrystalline and long at a slant inner to silicon ingot, has significantly reduced the monocrystalline area.
It is relevant with the structure of ingot furnace thermal field to cause producing the polycrystalline reason; Particularly, in the structure of the ingot furnace thermal field of prior art, the graphite base plate links to each other with graphite side; Whole as heat conduction and supporter, the heat at crucible outer wall place can at first distribute through the high graphite piece of thermal conductivity.Because the material of graphite side and crucible is different, thermal conductivity has very big difference like this.Owing to be separated by with the graphite base plate at the bottom of crucible is arranged, longitudinal temperature gradient is bigger in the crucible; And crucible is outer owing to there is graphite side to link to each other with the graphite base plate, and longitudinal temperature gradient is less.The temperature of graphite base plate is the comparison uniformity, so cause the inside and outside appearance temperature of sidewall of crucible poor (the crucible inner wall temperature is high, and the crucible outside wall temperature is low colder); So preferentially crystallization here during crystallization, because not crystallization on seed crystal, so grow polycrystalline; And polycrystalline is inwardly grown, and causes the monocrystalline area less, and crystal growth direction slopes inwardly; The ratio of monocrystalline reduces in the crystal, and battery efficiency is lower.
The utility model content
The utility model aims to provide a kind of ingot furnace thermal field, causes monocrystalline area problem of smaller greatly with the sidewall of crucible inside and outside temperature difference that solves ingot furnace thermal field in the prior art.
To achieve these goals, the utility model provides a kind of ingot furnace thermal field, comprising: crucible; Base plate is supported on the bottom of crucible; Side plate, it is outer and be positioned at the top of base plate to be around in crucible, and the ingot furnace thermal field also comprises the thermal insulation barriers that is arranged between base plate and the side plate.
Further, thermal insulation barriers is the soft felt of graphite.
Further, thermal insulation barriers comprises four soft felt rugs of graphite, and four soft felt rugs of graphite surround square.
Further, the thickness of the every soft felt rug of graphite is in the scope of 10mm to 30mm.
Further; Side plate is four; Interconnect one common peripheral dreit) tubular between per two adjacent side panels in four side plates, the soft felt rug of graphite is identical along the circumferential length of crucible with side plate along the circumferential length of crucible, and the soft felt rug of graphite is identical with the thickness of side plate along crucible radial width.
Further, the outside surface of the internal surface of side plate and crucible fits.
Further, the upper end position of side plate is higher than the upper end position of crucible.
In the technical scheme of the utility model, the ingot furnace thermal field comprises: crucible, base plate, side plate and thermal insulation barriers.Wherein, backplanes support is in the bottom of crucible; Side plate is around in outside the crucible and is positioned at the top of base plate, and thermal insulation barriers is arranged between base plate and the side plate.
The utility model is through increasing thermal insulation barriers between base plate and side plate; Reduced the vertical heat radiation of side plate; Increase the vertical temperature gradient of crucible outer wall, made crucible inwall outside wall temperature difference reduce, directly influenced the interface shape in growth early stage; Make edge interface more mild, i.e. growth has reduced the solid-liquid interface convexity of the cold excessively edge that causes in edge early stage.The utility model separates base plate and side plate, makes growth interface in earlier stage milder, suppresses heterogeneous nucleation, more helps the formation of big area monocrystalline.Compare with traditional class monocrystalline ingot furnace thermal field, the utility model has suppressed the vertical heat radiation of crucible outer wall, and the crystal vertical-growth makes growth interface in earlier stage milder, more helps the formation of big area monocrystalline, thereby improves the integral battery door efficiency of conversion.
Description of drawings
The Figure of description that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 shows the cross-sectional schematic according to the embodiment of the ingot furnace thermal field of the utility model;
Fig. 2 shows the A place partial enlarged drawing of the ingot furnace thermal field of Fig. 1;
Fig. 3 shows the schematic top plan view of thermal insulation barriers of the ingot furnace thermal field of Fig. 1; And
Fig. 4 shows the schematic side view of the thermal insulation barriers of Fig. 3.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the utility model.
As depicted in figs. 1 and 2, the ingot furnace thermal field of present embodiment comprises: body of heater, be arranged on the intravital heat-insulation cage of stove and be arranged on crucible 10, base plate 20, side plate 30 and thermal insulation barriers 40 in the heat-insulation cage 1.The effect of heat-insulation cage 1 separates thermal field and outer furnace chamber; Heat is not run off; Have Ar gas air inlet port 1a, Ar gas production well 1b and metering orifice 1c on the heat-insulation cage 1, Ar gas plays and can insert glass stick in protection and the impurities removal effect, metering orifice 1c and be used to measure crystal melting or growing height.Above crucible 10, be provided with well heater 1d.Base plate 20 is supported on the bottom of crucible 10; Side plate 30 is around in outside the crucible 10 and is positioned at the top of base plate 20, and thermal insulation barriers 40 is arranged between base plate 20 and the side plate 30.
Present embodiment is through increasing thermal insulation barriers between base plate 20 and side plate 30; Reduced the vertical heat radiation of side plate 30; Increase the vertical temperature gradient of crucible 10 outer walls, made crucible 10 inwall outside wall temperature differences reduce, directly influenced the interface shape in growth early stage; Make edge interface more mild, i.e. growth has reduced the solid-liquid interface convexity of the cold excessively edge that causes in edge early stage.Present embodiment separates base plate 20 and side plate 30, makes growth interface in earlier stage milder, suppresses heterogeneous nucleation, more helps the formation of big area monocrystalline.Compare with traditional class monocrystalline ingot furnace thermal field, present embodiment has suppressed the vertical heat radiation of crucible 10 outer walls, and the crystal vertical-growth makes growth interface in earlier stage milder, more helps the formation of big area monocrystalline, thereby improves the integral battery door efficiency of conversion.
In the present embodiment, the material of base plate 20 and side plate 30 is graphite, good heat conduction effect, thermal insulation barriers 40 be the soft felt of graphite, thermal conductivity is very little, has excellent heat insulation property and high-temperature stability, be used for heat insulation, with the realization temperature controlling.
Preferably, to shown in Figure 4, thermal insulation barriers 40 comprises that four soft felt rugs 41 of 41, four graphite of the soft felt rug of graphite surround square like Fig. 3.Further preferably, the thickness of the every soft felt rug 41 of graphite is in the scope of 10mm to 30mm.
The outside surface of the internal surface of side plate 30 and crucible 10 fits.The upper end position of side plate 30 is higher than the upper end position of crucible 10.
From above description, can find out that the utility model the above embodiments have realized following technique effect:
Through between graphite side and graphite base plate, increasing heat insulation soft felt, the heat that has well reduced the graphite side adjacent with the crucible outer wall runs off.Make crucible outer wall place longitudinal temperature gradient become big, the strain of temperature curve slope phase is big.It is serious in earlier stage to have reduced the cold excessively marginal growth interface projection that causes in crucible edge in growth, has effectively suppressed the non-sporadic nucleation at sidewall of crucible place, and polycrystalline ceramics is reduced, and the monocrystalline ratio increases.Compare with traditional class monocrystalline ingot casting design, this utility model has suppressed the vertical heat radiation of graphite backplate sidepiece, has reduced the heterogeneous nucleation point, and the crystal vertical-growth more helps the generation of big area monocrystalline.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (7)
1. ingot furnace thermal field comprises:
Crucible (10);
Base plate (20) is supported on the bottom of said crucible (10);
Side plate (30), it is outer and be positioned at the top of said base plate (20) to be around in said crucible (10),
It is characterized in that said ingot furnace thermal field also comprises the thermal insulation barriers (40) that is arranged between said base plate (20) and the side plate (30).
2. ingot furnace thermal field according to claim 1 is characterized in that, said thermal insulation barriers (40) is the soft felt of graphite.
3. ingot furnace thermal field according to claim 1 is characterized in that, said thermal insulation barriers (40) comprises four soft felt rugs of graphite (41), and said four soft felt rugs of graphite (41) surround square.
4. ingot furnace thermal field according to claim 3 is characterized in that, the thickness of the every soft felt rug of said graphite (41) is in the scope of 10mm to 30mm.
5. ingot furnace thermal field according to claim 3; It is characterized in that; Said side plate (30) is four; Interconnect one common peripheral dreit) tubular between per two adjacent said side plates in said four side plates, the soft felt rug of said graphite (41) is identical along the circumferential length of crucible with said side plate (30) along the circumferential length of crucible, and the soft felt rug of said graphite (41) is identical with the thickness of said side plate (30) along crucible radial width.
6. ingot furnace thermal field according to claim 1 is characterized in that, the outside surface of the internal surface of said side plate (30) and said crucible (10) fits.
7. ingot furnace thermal field according to claim 1 is characterized in that, the upper end position of said side plate (30) is higher than the upper end position of said crucible (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220276001 CN202626347U (en) | 2012-06-12 | 2012-06-12 | Ingot furnace thermal field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220276001 CN202626347U (en) | 2012-06-12 | 2012-06-12 | Ingot furnace thermal field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202626347U true CN202626347U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220276001 Expired - Fee Related CN202626347U (en) | 2012-06-12 | 2012-06-12 | Ingot furnace thermal field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202626347U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397379A (en) * | 2013-08-16 | 2013-11-20 | 天威新能源控股有限公司 | High-efficiency polycrystalline silicon ingot casting furnace |
| CN103590096A (en) * | 2013-11-15 | 2014-02-19 | 英利集团有限公司 | Ingot furnace and method for controlling retaining height of seed crystals during casting of quasi-single crystal |
-
2012
- 2012-06-12 CN CN 201220276001 patent/CN202626347U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397379A (en) * | 2013-08-16 | 2013-11-20 | 天威新能源控股有限公司 | High-efficiency polycrystalline silicon ingot casting furnace |
| CN103590096A (en) * | 2013-11-15 | 2014-02-19 | 英利集团有限公司 | Ingot furnace and method for controlling retaining height of seed crystals during casting of quasi-single crystal |
| CN103590096B (en) * | 2013-11-15 | 2016-06-08 | 英利集团有限公司 | The method of seed crystal Bock Altitude in ingot furnace and control class single crystal casting process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20160612 |
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| CF01 | Termination of patent right due to non-payment of annual fee |