CN202021037U - Novel composite type synthetic block - Google Patents
Novel composite type synthetic block Download PDFInfo
- Publication number
- CN202021037U CN202021037U CN201120022311XU CN201120022311U CN202021037U CN 202021037 U CN202021037 U CN 202021037U CN 201120022311X U CN201120022311X U CN 201120022311XU CN 201120022311 U CN201120022311 U CN 201120022311U CN 202021037 U CN202021037 U CN 202021037U
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- CN
- China
- Prior art keywords
- pyrophyllite
- graphite
- graphite post
- steel ring
- pressure
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Abstract
The utility model discloses a novel composite type synthetic block which comprises a graphite pillar, conductive steel rings at two ends of the graphite pillar, and cylindrical pyrophyllite seal pressure transmitting layer at the peripheries of the graphite pillar and the conductive steel rings, wherein the conductive steel rings are filled with composite media; and a mixed liner tube is arranged in the middle of the inner wall of the pyrophyllite seal pressure transmitting layer. The mixed liner tube is free from phase transition under high temperature and high pressure, can provide a uniform and stable pressure temperature field for the growth of diamonds, effectively reduces the synthesis gage pressure and increases the proportion of high-grade diamonds.
Description
Technical field
The utility model belongs to the superhard material synthesis technical field, and particularly a kind of new type compound synthesizes piece.
Background technology
In the synthetic field of superhard material, the synthetic piece under the superhigh-temperature and-pressure condition is the insulation component of the graphite post made by graphite and catalyst mixed powder, graphite post periphery and heating element heater, the conducting steel ring at graphite post two ends, the blocks that the pressure transmission sealing medium assembles according to certain way.Concrete assembling mode is: assembling successively from outside to inside, the peripheral complex media that adopts is as the pressure transmission encapsulant, the conducting steel ring heating of switching on is adopted at two ends, conducting steel ring closely contacts with the heating element heater of inboard, make heating element heater heating itself by conducting steel ring during energising, insulation component through the inboard closely contact of heating element heater reaches heat and the inboard graphite post that closely contacts of insulation component then, makes graphite and catalyst be converted into diamond under the superhigh-temperature and-pressure condition.
In adamantine building-up process, because overall merits such as the pressure transmission sealing medium pyrophyllite as the parcel sample container has that the pressure transmission performance is good concurrently, good seal performance, good insulation preformance, heat insulation heat resistance is good, thermal stability is good, chemical stability is good and machining property is good, so extensively be used as the container that wraps up sample.But because pyrophyllite has phase transformation under high-temperature and high-pressure conditions, promptly the pressure at the diamond suitable growth be 5.5 ~ 6.0Gpa, when temperature is 1620 ~ 1720K, the crystallization water in the pyrophyllite impels pyrophyllite to be phase-changed into kyanite and coesite, volume contraction makes the pyrophyllite volume contraction to itself 12.6%.This phase transformation and the volume contraction of following cause synthetic piece high pressure chest internal pressure decline, heat-insulating property variation, make the diamond film environment severe exacerbation in the synthetic piece high pressure chest, cause unstable product quality.
Though dolomite has good heat insulating, coefficient of internal friction is little, thermal coefficient of expansion is big, and advantage such as do not undergo phase transition under not moisture, the HTHP, but combine with the pyrophyllite that easily undergoes phase transition under the HTHP, in can only playing and the effect of pyrophyllite deficiency, the defective that pyrophyllite easily undergoes phase transition be can not overcome fully under high-temperature and high-pressure conditions, synthetic quality of diamond and output influenced.
The utility model content
The purpose of this utility model provides a kind of synthetic piece of new type compound that can not undergo phase transition, effectively improve the diamond quality under HTHP.
For achieving the above object, the technical solution of the utility model is: a kind of new type compound synthesizes piece, comprise the conducting steel ring at graphite post, graphite post two ends and the tubular pyrophyllite sealing pressure transfer of graphite post and conducting steel ring periphery, be filled with complex media in the conducting steel ring, described pyrophyllite sealing pressure transfer inwall middle part is provided with the mixing bushing pipe.
Described pyrophyllite sealing pressure transfer inwall middle part is provided with groove, mix liner sleeve and be contained in the groove, and it is mutually concordant with pyrophyllite sealing pressure transfer internal face to mix the bushing pipe internal face.
Between described mixing bushing pipe and the graphite post outer peripheral face, be equipped with heating element heater between conducting steel ring and the graphite post both ends of the surface.
Be provided with insulation component between described heating element heater and the graphite outer surface of column.
Compared with prior art, the utility model has the advantages that:
1, pyrophyllite sealing pressure transfer inwall middle part is provided with the mixing bushing pipe, mixing bushing pipe can not undergo phase transition under HTHP, can effectively reduce synthetic gauge pressure for growth of diamond provides an even and pressure stable temperature field, improve the ratio of high grade diamond; Mix the bushing pipe that compacting forms with dolomite by the dehydration pyrophyllite, guaranteeing under the constant prerequisite of sealing, not only reduced the heat outflow in the synthetic chamber, promptly improved heat insulating ability, and reduced axial pressure gradient in the synthetic chamber promptly balanced pressure field, be that diamond is created stable growing environment.
2, mix between bushing pipe and the graphite post outer peripheral face, be equipped with heating element heater between conducting steel ring and the graphite post both ends of the surface, heating element heater is from outside to inside to the heat conduction of graphite post, improved heat transfer efficiency greatly, can be balanced, stablize the interior temperature field of synthetic cavity, create stable growing environment to diamond, thereby improve adamantine output and quality.
3, on Φ 650 cylinder diameter cubic hinge press, adopt Φ 49 cavitys to make the compound experiment of the synthetic piece of new type compound, trimestral experimental results show that of process: greatly reduce synthesis pressure, reduced by 3-5Mpa; From synthetic good graphite post, the diamond crystalline form is complete and regular; Wash the material result and show, the excellent brilliant ratio of diamond is brought up to about 33% from about 30%, improved synthetic quality greatly.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
New type compound as shown in Figure 1 synthesizes piece, it comprises the conducting steel ring 2 at graphite post 5, graphite post 5 two ends and the tubular pyrophyllite sealing pressure transfer 1 of graphite post 5 and conducting steel ring 2 peripheries, graphite post 5 is formed by graphite and the compacting of catalyst powder, be filled with complex media 7 in the conducting steel ring 2, conducting steel ring 2 is arranged on the two ends of graphite post 5, and pyrophyllite sealing pressure transfer 1 is arranged on the periphery of graphite post 5 and conducting steel ring 2.Inwall middle part in pyrophyllite sealing pressure transfer 1 is provided with groove, be set with in the groove and mix bushing pipe 6, and the internal face of mixing bushing pipe 6 is mutually concordant with the internal face of pyrophyllite sealing pressure transfer 1.
Mixing between bushing pipe 6 and graphite post 5 outer peripheral faces, be equipped with heating element heater between conducting steel ring 2 and graphite post 5 both ends of the surface, heating element heater is from outside to inside to 5 heat conduction of graphite post, heating element heater comprises the heating tube 3 at graphite post 5 outer peripheral face places and the heating plate 31 of graphite post 5 two end faces, and heating tube 3 is trapped among graphite post 5 outsides with heating plate 31 sealed packets.Be provided with insulation component 4 between the heating tube 3 of heating element heater and heating plate 31 and graphite post 5 outer surfaces.
The manufacturing process of mixing bushing pipe 6 is: at first, pyrophyllite was heated 1 hour under the 1223K temperature, make its fully dehydrating; Then, dolomite and the weight ratio of dehydration pyrophyllite with 1:1 are mixed, and add a spot of binding agent (waterglass), utilize four post press to be pressed into bushing pipe.
Mix bushing pipe 6 and not only can stop pyrophyllite under HTHP, to undergo phase transition, can also provide one evenly and the pressure stable temperature field, reduce synthetic gauge pressure for growth of diamond, thereby improve adamantine output and quality.
Claims (4)
1. a new type compound synthesizes piece, comprise the conducting steel ring at graphite post, graphite post two ends and the tubular pyrophyllite sealing pressure transfer of graphite post and conducting steel ring periphery, be filled with complex media in the conducting steel ring, it is characterized in that: described pyrophyllite sealing pressure transfer inwall middle part is provided with the mixing bushing pipe.
2. new type compound as claimed in claim 1 synthesizes piece, it is characterized in that: described pyrophyllite sealing pressure transfer inwall middle part is provided with groove, mix liner sleeve and be contained in the groove, and it is mutually concordant with pyrophyllite sealing pressure transfer internal face to mix the bushing pipe internal face.
3. new type compound as claimed in claim 1 or 2 synthesizes piece, it is characterized in that: between described mixing bushing pipe and the graphite post outer peripheral face, be equipped with heating element heater between conducting steel ring and the graphite post both ends of the surface.
4. new type compound as claimed in claim 3 synthesizes piece, it is characterized in that: be provided with insulation component between described heating element heater and the graphite outer surface of column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120022311XU CN202021037U (en) | 2011-01-24 | 2011-01-24 | Novel composite type synthetic block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120022311XU CN202021037U (en) | 2011-01-24 | 2011-01-24 | Novel composite type synthetic block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202021037U true CN202021037U (en) | 2011-11-02 |
Family
ID=44846007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120022311XU Expired - Fee Related CN202021037U (en) | 2011-01-24 | 2011-01-24 | Novel composite type synthetic block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202021037U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949188A (en) * | 2014-05-14 | 2014-07-30 | 河南飞孟金刚石工业有限公司 | Lining tube for polycrystalline diamond synthesis and preparation method of lining tube |
-
2011
- 2011-01-24 CN CN201120022311XU patent/CN202021037U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949188A (en) * | 2014-05-14 | 2014-07-30 | 河南飞孟金刚石工业有限公司 | Lining tube for polycrystalline diamond synthesis and preparation method of lining tube |
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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: 20111102 Termination date: 20150124 |
|
| EXPY | Termination of patent right or utility model |