CN203209029U - Graphite gradient heating element for artificial diamond single crystal growth - Google Patents
Graphite gradient heating element for artificial diamond single crystal growth Download PDFInfo
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- CN203209029U CN203209029U CN 201320136502 CN201320136502U CN203209029U CN 203209029 U CN203209029 U CN 203209029U CN 201320136502 CN201320136502 CN 201320136502 CN 201320136502 U CN201320136502 U CN 201320136502U CN 203209029 U CN203209029 U CN 203209029U
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- single crystal
- generating pipe
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Abstract
The utility model relates to a graphite gradient heating element for artificial diamond single crystal growth. The graphite gradient heating element for artificial diamond single crystal growth comprises a conical graphite heating pipe, wherein the conical graphite heating pipe comprises a heating wall body and a straight-type empty cavity which is surrounded by the heating wall body and is communicated up and down; the outer wall of the heating wall body of the conical graphite heating pipe is conical; the wall thickness of the upper end of the heating wall body of the conical graphite heating pipe is less than the wall thickness of the lower end of the heating wall body of the conical graphite heating pipe; the resistance of the upper end of the heating wall body of the conical graphite heating pipe is greater than the resistance of the lower end of the heating wall body of the conical graphite heating pipe; the wall thicknesses of the heating wall body of the conical graphite heating pipe are different and increase gradually from top to bottom; the resistance values of the heating wall body of the conical graphite heating pipe are different and decrease gradually from top to bottom. The graphite gradient heating element for artificial diamond single crystal growth cannot easily generate heat stagnation in heating; the temperature differences in a container cavity body for artificial diamond single crystal growth are convenient to effectively control; the production quality of artificial diamond single crystal growth is further improved.
Description
Technical field
The utility model relates to a kind of synthetic diamond single crystal and grows and use the graphite gradient heater element.
Background technology
With high temperature-high-pressure process growing large-size synthetic diamond single crystal the time, all adopt temperature differential method.Be the cold junction that synthetic diamond single crystal's crystal seed is positioned at container, the high purity graphite source is positioned at the hot junction of container.About 30 ℃ temperature difference need be kept in the tubular graphene heater element two ends of available technology adopting.At present on the top, two sides, cubic apparatus, bulb separation formula press are contour when being pressed on the equipment rapid growth of diamond single-crystal, general adopt to strengthen near crystal seed end tungsten carbide press the method for anvil cooling water flow to keep this temperature difference.Because the tungsten carbide of all kinds of extra high voltage systems presses the anvil cooling system away from the high pressure synthetic cavity, very easily forms heat stagnation, often cause the crystal growth poor repeatability, in crystal, form problem such as metal inclusion enclave easily.
The utility model content
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, provide a kind of synthetic diamond single crystal to grow and use the graphite gradient heater element, be difficult for causing heat stagnation.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of synthetic diamond single crystal grows and uses the graphite gradient heater element, has the conical graphite heat-generating pipe, described conical graphite heat-generating pipe have the heating wall body and by the heating wall body surround on, the straight type cavity that communicates down, the outer wall of the heating wall body of described conical graphite heat-generating pipe is taper, the wall thickness of the upper end of the heating wall body of described conical graphite heat-generating pipe is less than the wall thickness of the lower end of the heating wall body of conical graphite heat-generating pipe, and the resistance of the upper end of the heating wall body of described conical graphite heat-generating pipe is greater than the resistance of the lower end of the heating wall body of conical graphite heat-generating pipe.
Further, the different and increase gradually of the heating wall body of described conical graphite heat-generating pipe wall thickness from top to bottom, the heating wall body of described conical graphite heat-generating pipe resistance value from top to bottom is different also to be reduced gradually.
The beneficial effects of the utility model are: the straight type cavity of conical graphite heat-generating pipe of the present utility model is used for placing synthetic diamond single crystal's vessel for growing, the temperature of the upper end of container is higher than the temperature of the lower end of container, the upper end of container is the hot junction, the lower end of container is cold junction, the wall thickness of conical graphite heat-generating pipe heating wall body upper end is less and resistance is bigger, the hot junction of the corresponding container in cavity upper end of conical graphite heat-generating pipe, it is less that the wall thickness of conical graphite heat-generating pipe heating wall body lower end reaches resistance more greatly, the cold junction of the corresponding container in the cavity lower end of conical graphite heat-generating pipe.Because during the high pressure synthesis of artificial diamond, grow lead, the tungsten carbide of usefulness of graphite gradient heater element and outside synthetic diamond single crystal presses anvil to constitute series circuit, so resistance is more big, and heating power is more big.Because the resistance value difference of the heating wall body top and bottom of conical graphite heat-generating pipe is difficult for when therefore heating producing heat stagnation, to the better performances of keeping of the temperature difference.The current-voltage of graphite gradient heater element is controlled by the external heat power supply, can control the heating power of graphite gradient heater element by the current-voltage of control external heat power supply, be convenient to effectively control the temperature difference in synthetic diamond single crystal's vessel for growing cavity, further improve the quality of production of synthetic diamond single crystal's growth.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation after the straight type cavity of conical graphite heat-generating pipe of the present utility model is placed synthetic diamond single crystal's vessel for growing;
Wherein: 1, conical graphite heat-generating pipe, 2, container, 3, graphitic source, 4, the diamond crystal seed.
The specific embodiment
By reference to the accompanying drawings the utility model is further described now.The schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present utility model in a schematic way, so it only shows the formation relevant with the utility model.
As shown in Figure 1, a kind of synthetic diamond single crystal grows and uses the graphite gradient heater element, has conical graphite heat-generating pipe 1, the upper and lower straight type cavity that communicates that conical graphite heat-generating pipe 1 has the heating wall body and surrounded by the heating wall body, the outer wall of the heating wall body of conical graphite heat-generating pipe 1 is taper, the wall thickness of the upper end of the heating wall body of conical graphite heat-generating pipe 1 is less than the wall thickness of the lower end of the heating wall body of conical graphite heat-generating pipe 1, and the resistance of the upper end of the heating wall body of conical graphite heat-generating pipe 1 is greater than the resistance of the lower end of the heating wall body of conical graphite heat-generating pipe 1.Different and the increase gradually of the heating wall body of conical graphite heat-generating pipe 1 wall thickness from top to bottom, the heating wall body of conical graphite heat-generating pipe 1 resistance value from top to bottom is different also to be reduced gradually.
As shown in Figure 2, during use, the straight type cavity of conical graphite heat-generating pipe 1 of the present utility model is placed synthetic diamond single crystal's vessel for growing 2, the temperature of the upper end of container 2 is higher than the temperature of the lower end of container 2, the upper end of container 2 is the hot junction, the lower end of container 2 is cold junction, and the upper end of container 2 is used for placing the synthetic diamond single crystal grows with graphitic source 3, and the lower end of container 2 is used for placing diamond crystal seed 4 and synthetic diamond single crystal's catalyst for growth.
The wall thickness of conical graphite heat-generating pipe 1 heating wall body upper end is less and resistance is bigger, the hot junction of the corresponding container 2 in cavity upper end of conical graphite heat-generating pipe 1, it is less that the wall thickness of conical graphite heat-generating pipe 1 heating wall body lower end reaches resistance more greatly, the cold junction of the corresponding container 2 in the cavity lower end of conical graphite heat-generating pipe 1.
Because during the high pressure synthesis of artificial diamond, grow lead, the tungsten carbide of usefulness of graphite gradient heater element and outside synthetic diamond single crystal presses anvil to constitute series circuit, so resistance is more big, and heating power is more big.Because the resistance value difference of the heating wall body top and bottom of conical graphite heat-generating pipe 1 is difficult for when therefore heating producing heat stagnation, the current-voltage of graphite gradient heater element is controlled by the external heat power supply, by horse-power formula W=I
2R or W=U
2/ R as can be known, can control the heating power of graphite gradient heater element by the current-voltage of control external heat power supply, be convenient to effectively control the temperature difference in synthetic diamond single crystal's vessel for growing cavity, further improve the quality of production of synthetic diamond single crystal's growth.
Be enlightenment with above-mentioned foundation desirable embodiment of the present utility model, by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (2)
1. a synthetic diamond single crystal grows and uses the graphite gradient heater element, it is characterized in that: have the conical graphite heat-generating pipe, described conical graphite heat-generating pipe have the heating wall body and by the heating wall body surround on, the straight type cavity that communicates down, the outer wall of the heating wall body of described conical graphite heat-generating pipe is taper, the wall thickness of the upper end of the heating wall body of described conical graphite heat-generating pipe is less than the wall thickness of the lower end of the heating wall body of conical graphite heat-generating pipe, and the resistance of the upper end of the heating wall body of described conical graphite heat-generating pipe is greater than the resistance of the lower end of the heating wall body of conical graphite heat-generating pipe.
2. a kind of synthetic diamond single crystal according to claim 1 grows and uses the graphite gradient heater element, it is characterized in that: the different and increase gradually of the heating wall body of described conical graphite heat-generating pipe wall thickness from top to bottom, the heating wall body of described conical graphite heat-generating pipe resistance value from top to bottom is different also to be reduced gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320136502 CN203209029U (en) | 2013-03-22 | 2013-03-22 | Graphite gradient heating element for artificial diamond single crystal growth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320136502 CN203209029U (en) | 2013-03-22 | 2013-03-22 | Graphite gradient heating element for artificial diamond single crystal growth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203209029U true CN203209029U (en) | 2013-09-25 |
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ID=49198602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320136502 Expired - Fee Related CN203209029U (en) | 2013-03-22 | 2013-03-22 | Graphite gradient heating element for artificial diamond single crystal growth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203209029U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208443A (en) * | 2018-08-30 | 2019-01-15 | 中南钻石有限公司 | A kind of polycrystalline diamond composite cutter bit Synthetic block and its method for synthesizing polycrystalline diamond composite cutter bit |
| CN110801778A (en) * | 2019-07-16 | 2020-02-18 | 河南理工大学 | Colorless gem grade diamond large single crystal synthesis device |
-
2013
- 2013-03-22 CN CN 201320136502 patent/CN203209029U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208443A (en) * | 2018-08-30 | 2019-01-15 | 中南钻石有限公司 | A kind of polycrystalline diamond composite cutter bit Synthetic block and its method for synthesizing polycrystalline diamond composite cutter bit |
| CN110801778A (en) * | 2019-07-16 | 2020-02-18 | 河南理工大学 | Colorless gem grade diamond large single crystal synthesis device |
| CN110801778B (en) * | 2019-07-16 | 2022-02-08 | 河南飞孟金刚石工业有限公司 | Colorless gem grade diamond large single crystal synthesis device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130925 Termination date: 20140322 |