CN203459046U - Graphite heater for improving cavity temperature uniformity of superhard-material synthesis block - Google Patents
Graphite heater for improving cavity temperature uniformity of superhard-material synthesis block Download PDFInfo
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- CN203459046U CN203459046U CN201320447528.4U CN201320447528U CN203459046U CN 203459046 U CN203459046 U CN 203459046U CN 201320447528 U CN201320447528 U CN 201320447528U CN 203459046 U CN203459046 U CN 203459046U
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Abstract
The utility model discloses a graphite heater for improving the cavity temperature uniformity of a superhard-material synthesis block. The graphite heater consists of an upper heating body and a lower heating body which are independently separate and are symmetrical to each other; each of the upper and lower heating bodies is formed through the press molding of a section A, a section B and a section C, and the section A, the section B and the section C are all graphite tubes. The graphite heater can effectively solve the problems in the prior art, has the characteristics of simple structure, low cost, easiness in forming and convenience in assembly and can remarkably improve the yield and product quality of superhard materials.
Description
Technical field
The utility model belongs to superhard material HTHP synthesis technical field, is specifically related to the synthetic inhomogeneity graphite heating body of piece cavity temperature of a kind of raising superhard material.
Background technology
The synthetic of the superhard materials such as diamond, cBN and composite sheet all adopts quiet high pressure technique to complete under high-temperature and high-pressure conditions, and the synthesis pressure of superhard material is generally greater than 5.0GPa, and synthetic temperature is 1200 ℃ to 1500 ℃.The generation of HTHP is generally to act on the synthetic piece of pyrophyllite by cubic hinge press, and calandria is set in synthetic piece cavity provides power supply heating to produce the needed temperature of synthesizing superhard material by outside.In the synthetic field of China's HTHP, graphite heating body is generally formed by graphite rod turning, graphite powder compacting or graphite paper writing that surpasses all the others, the principle of heating is to give graphite-pipe low-voltage and high-current by cubic hinge press, but because graphite heating thickness of pipe wall is identical, upper and lower resistivity also equates, generates heat evenly up and down.In actual superhard material building-up process, because of pyrophyllite synthetic cavity middle part good heat insulation, dispel the heat little, often make the middle part temperature drift of whole synthetic piece, two ends cause the inhomogeneous of high pressure synthetic cavity internal temperature field distribution, the output and the Quality Down that cause the sintetics of diamond, cBN and composite sheet etc., the consumption of electric energy declines, and hammer consumption raises.
At main patent documentation aspect the calandria of the synthetic field of HTHP, have: Chinese utility model patent < < heating body for super hard material synthesizing > > (publication number CN 201230381Y, open day on April 29th, 2009) in, introduced a kind of diamond and synthetic a kind of heating body for super hard material synthesizing of cubic boron nitride of being applicable to, this calandria is by A, B, the heating tube of tri-sections of different resistivity of A combines, wherein, middle A section heating tube resistivity is low, the resistivity of B section heating tube is high.In its A, two sections of employing natural graphite powders of B, add by weight different hexagonal boron nitride powder homogenious charge compression systems to form, use this calandria, can play the effect of equilibrium temperature field, but processing and forming difficulty is difficult to solve.
Synthetic body > > (publication number CN 201039486 Y that are heated by resistive of Chinese utility model patent < < superhard material, open day on March 19th, 2008) in, introduced the synthetic body that is heated by resistive of a kind of superhard material, repressed or roll the thin-walled tubular conductive shell forming and form by one or more layers carbon paper, can increase the dischargeable capacity of synthetic cavity, can realize easily minimizing of conductive shell wall thickness again simultaneously, make simply fairly simple, but graphite paper compacting is more difficult, uniformity is difficult to be guaranteed.
Utility model content
The purpose of this utility model is to provide a kind of raising superhard material to synthesize the inhomogeneity graphite heating body of piece cavity temperature, can effectively solve the problems of the prior art, have simple in structure, with low cost, moulding easily, be convenient to the feature of assembling, can significantly improve output capacity and the product quality of superhard material.
The utility model is by the following technical solutions:
Raising superhard material synthesizes the inhomogeneity graphite heating body of piece cavity temperature, wherein, and by independently separately mutually to being much of calandria and lower calandria forms; Upper calandria and lower calandria are compressing by A section, B section, three sections of C sections, and described A section, B section, C section are graphite-pipe.
As preferably, the graphite-pipe internal diameter of described A section, B section, C section equates.
As preferably, the thickness of described A section, B section, C section strengthens successively, reduces highly successively.
The beneficial effects of the utility model are:
Because graphite-pipe wall thickness is different, the resistance of this graphite heating body becomes three ladder degree to distribute, the resistivity of mid portion is less than the resistivity at upper and lower two, therefore the in the situation that of same electric current, the middle heat that produces is just less than the heat that two produces, the uniformity that has so just improved temperature in the synthetic piece cavity of superhard material, structure of the present utility model is convenient to machine-shaping on the other hand, is also convenient to the assembling that height is pressed into piece simultaneously.The utility model can improve the synthetic piece cavity temperature uniformity of superhard material effectively, and the region of the inner CBN of being applicable to of high pressure synthetic cavity and adamantine growth is broadened, and improves output and the quality of superhard material product.
Accompanying drawing explanation
Fig. 1 is the structural representation of upper calandria of the present utility model;
Fig. 2 is the structural representation of lower calandria of the present utility model.
The specific embodiment
As shown in Figure 1 and Figure 2, the utility model is by independently separately mutually to being much of calandria and lower calandria forms; Upper calandria and lower calandria are compressing by A section, B section, three sections of C sections.A section, B section, C section are graphite-pipe, and this graphite-pipe is formed by graphite powder compacting, and the material that A, B, C are tri-sections is identical, and the graphite powder granularity of employing is 200 orders, and graphite powder carbon content is 90%.The graphite-pipe internal diameter that A section, B section, C section are three sections equates, its thickness strengthens successively, and the height of three sections reduces successively.
Because graphite-pipe wall thickness is different, resistance of the present utility model becomes three ladder degree to distribute, the resistivity of mid portion is less than the resistivity at upper and lower two, therefore the in the situation that of same electric current, the middle heat that produces is just less than the heat that two produces, the uniformity that has so just improved temperature in the synthetic piece cavity of superhard material, structure of the present utility model is convenient to machine-shaping on the other hand, is also convenient to the assembling that height is pressed into piece simultaneously.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, other modifications that those of ordinary skills make the technical solution of the utility model or be equal to replacement, only otherwise depart from the spirit and scope of technical solutions of the utility model, all should be encompassed in the middle of claim scope of the present utility model.
Claims (3)
1. improve the synthetic inhomogeneity graphite heating body of piece cavity temperature of superhard material, it is characterized in that: by independently separately mutually to being much of calandria and lower calandria forms; Upper calandria and lower calandria are compressing by A section, B section, three sections of C sections, and described A section, B section, C section are graphite-pipe.
2. the synthetic inhomogeneity graphite heating body of piece cavity temperature of a kind of raising superhard material according to claim 1, is characterized in that: the graphite-pipe internal diameter of described A section, B section, C section equates.
3. the synthetic inhomogeneity graphite heating body of piece cavity temperature of a kind of raising superhard material according to claim 1 and 2, is characterized in that: the thickness of described A section, B section, C section strengthens successively, reduces highly successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320447528.4U CN203459046U (en) | 2013-07-26 | 2013-07-26 | Graphite heater for improving cavity temperature uniformity of superhard-material synthesis block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320447528.4U CN203459046U (en) | 2013-07-26 | 2013-07-26 | Graphite heater for improving cavity temperature uniformity of superhard-material synthesis block |
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| Publication Number | Publication Date |
|---|---|
| CN203459046U true CN203459046U (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320447528.4U Expired - Fee Related CN203459046U (en) | 2013-07-26 | 2013-07-26 | Graphite heater for improving cavity temperature uniformity of superhard-material synthesis block |
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| CN (1) | CN203459046U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107362750A (en) * | 2017-07-24 | 2017-11-21 | 中南钻石有限公司 | A kind of composite polycrystal-diamond and its Synthetic block |
| CN110465664A (en) * | 2019-08-12 | 2019-11-19 | 江苏大学 | It is used to prepare the combined type discharging plasma agglomeration mold of gradient porous composite material |
| CN110801778A (en) * | 2019-07-16 | 2020-02-18 | 河南理工大学 | Colorless gem grade diamond large single crystal synthesis device |
| CN111672420A (en) * | 2020-06-15 | 2020-09-18 | 山东聊城君锐超硬材料有限公司 | Special-shaped powder pressure heating pipe for diamond synthesis and synthetic block |
-
2013
- 2013-07-26 CN CN201320447528.4U patent/CN203459046U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107362750A (en) * | 2017-07-24 | 2017-11-21 | 中南钻石有限公司 | A kind of composite polycrystal-diamond and its Synthetic block |
| CN107362750B (en) * | 2017-07-24 | 2020-01-07 | 中南钻石有限公司 | Polycrystalline diamond compact and synthetic block thereof |
| 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 |
| CN110465664A (en) * | 2019-08-12 | 2019-11-19 | 江苏大学 | It is used to prepare the combined type discharging plasma agglomeration mold of gradient porous composite material |
| CN110465664B (en) * | 2019-08-12 | 2021-07-20 | 江苏大学 | Combined type discharge plasma sintering mold for preparing gradient porous composite material |
| CN111672420A (en) * | 2020-06-15 | 2020-09-18 | 山东聊城君锐超硬材料有限公司 | Special-shaped powder pressure heating pipe for diamond synthesis and synthetic block |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20140726 |
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| EXPY | Termination of patent right or utility model |