CN1686611A - Powdered catalyst for synthesizing diamond containing oxide - Google Patents
Powdered catalyst for synthesizing diamond containing oxide Download PDFInfo
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- CN1686611A CN1686611A CN 200510037860 CN200510037860A CN1686611A CN 1686611 A CN1686611 A CN 1686611A CN 200510037860 CN200510037860 CN 200510037860 CN 200510037860 A CN200510037860 A CN 200510037860A CN 1686611 A CN1686611 A CN 1686611A
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- catalyst
- powder
- diamond
- synthesizing diamond
- powdered catalyst
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Abstract
A powdered catalyst containing oxide for synthesizing diamond with complete crystal form and high transparency and mechanical properties contains proportionally ordinary Ni-based or Fe-based powder alloy catalyst and one or more of Ta, Sn, Cr, Li, Mg, B, O and their compound.
Description
Technical field
The invention belongs to artificially synthesizing diamond catalyst material technical field, refer in particular to a kind of oxidiferous powdered catalyst for synthesizing diamond material.
Background technology
The industrial production diamond must add catalytic alloy (Fe for example, Ni, Mn, the alloy that Co etc. form) in graphite raw material, the catalytic action through catalyst under the HTHP effect is converted into diamond with graphite part.Catalyst mainly is divided into two kinds in sheet and powder, and advanced at present powder catalyst adopts in industrial production in a large number.The quality and yield of diamond is mainly by technology, the composition of powder catalyst, granularity, crystalline form with and factors such as the degree that is uniformly dispersed decision in graphite; Powder catalyst preparation and with easy absorbed air of graphite powder blend stage, make catalyst grains surface that oxidation take place, have a strong impact on the quality of diamond.Present industrial elder generation is catalyst alloyization, powder process under vacuum condition then, at last under vacuum or protective atmosphere with the graphite powder blend, to reduce the catalyst oxidation.
Present powder catalyst production method, alloy melting and pulverizing cost are higher, as: " preparation of aerosolization Ni-Mn-Co alloy powder catalyst and the diamond synthesis characteristic thereof " that Zhang Shuguang etc. propose, PM technique, 20,16-19 (2002); Because the powder metallurgy specific area is bigger, chemical property is active, therefore make and with graphite powder blend process in be difficult to adsorbed gas is got rid of clean, the catalytic action of catalyst is reduced, influence the per unit area yield and the quality of diamond.
Summary of the invention
It is lower to the purpose of this invention is to provide a kind of manufacturing cost, removes the oxidiferous powdered catalyst for synthesizing diamond material of adsorbed gas easily.
Realize the powdered catalyst for synthesizing diamond material of above-mentioned purpose, its chemical composition is (weight): common Fe-Ni base powder alloy catalyst is 95%-60%, also contain Ta, Sn, Cr, Li, Mg, B in addition, the additive that one or more elements among the O and compound thereof constitute, it adds up to content is 5%-40%.By simple mechanical ball milling powder catalyst raw material and graphite powder are evenly mixed, briquette forming carries out sintering under protective atmosphere then; After passing through secondary ball milling and double sintering moulding again, it is synthetic that the graphite rod of acquisition can be directly used in diamond.
Advantage of the present invention is by changing the prescription of powder catalyst, the aeroponics technology that adopts simple powder catalyst preparation and powder catalyst one graphite powder blending technology to replace present routine simultaneously; By in powder catalyst, adding stable low melting point oxide and metal, solve the problem of powder catalyst adsorbed gas; The low melting point steady oxide forms melt in the diamond building-up process in addition, has promoted that carbon is to the transfer on catalyst grains surface in the diamond film process.Utilize the present invention, be not less than under the synthetic diamond prerequisite of conventional powder catalyst alloy method in other performance indications, can make the above bulky diamond of 50/60 order and 50/60 order account for total output can reach more than 50%.
The specific embodiment
Embodiment 1:
Graphite raw material (weight ratio): 90%
Powder catalyst (weight ratio): 10%
Various material proportions (weight ratio) are respectively in the powder catalyst:
Fe：65％
Ta：10％
Li：5％
Mg：10％
B
2O
3：10％
Embodiment 2:
Graphite raw material (weight ratio): 75%
Powder catalyst (weight ratio): 25%
Various material proportions (weight ratio) are respectively in the powder catalyst:
Fe：65％
Ni：15％
Li：5％
Si：5％
B
2O
3：10％
Embodiment 3:
Graphite raw material (weight ratio): 65%
Powder catalyst (weight ratio): 35%
Various material proportions (weight ratio) are respectively in the powder catalyst:
Fe：65％
Ni：25％
Li：5％
B
2O
3：5％
Implement the main effect in back:
At 420 cylinder diameters, on 6 * 14000KN cubic hinge press, utilize 37 * 37 * 37,23 cavity briquettings, approaching at graphite-diamond conversion ratio, simultaneously other performance indications are not less than and utilize traditional F e/Ni alloy powder catalyst (60%Fe is 40%Ni) under the synthetic diamond situation, when utilizing diamond synthesis of the present invention, diamond particle size distribute with traditional F e/Ni powder metallurgy catalyst method diamond synthesis particle size distribution relatively:
| 30/35 order | 36/40 order | 40/45 order | 45/50 order | More than 50/60 and 50/60 order | |
| Traditional F e/Ni powder catalyst (Fe=60%, Ni=40%) | ????23.2％ | ????14.2％ | ????26.4％ | ????26％ | ????10.2％ |
| Embodiment 1 | ????12.1％ | ????8.7％ | ????12.9％ | ????15.8％ | ????51.2％ |
| Embodiment 2 | ????10.7％ | ????11.2％ | ????13.4％ | ????14.4％ | ????50.3％ |
| Embodiment 3 | ????16.7％ | ????12.5％ | ????11.2％ | ????9.5％ | ????50.1％ |
Claims (1)
1. oxidiferous powdered catalyst for synthesizing diamond material, it is characterized in that chemical composition is (weight): the catalytic alloy that common Ni base or Fe based powders or the two mixed together form is 95%-60%, Ta, the Sn, Cr, Li, Mg, the B that also contain 5%-40% in addition, the additive that one or more elements among the O and compound thereof constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510037860 CN1686611A (en) | 2005-02-25 | 2005-02-25 | Powdered catalyst for synthesizing diamond containing oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510037860 CN1686611A (en) | 2005-02-25 | 2005-02-25 | Powdered catalyst for synthesizing diamond containing oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1686611A true CN1686611A (en) | 2005-10-26 |
Family
ID=35304653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510037860 Pending CN1686611A (en) | 2005-02-25 | 2005-02-25 | Powdered catalyst for synthesizing diamond containing oxide |
Country Status (1)
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| CN (1) | CN1686611A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829587A (en) * | 2010-05-28 | 2010-09-15 | 山东聊城昌润超硬材料有限公司 | Powdered catalyst for synthesizing octahedral diamond |
| CN106270484A (en) * | 2016-08-18 | 2017-01-04 | 中南钻石有限公司 | A kind of preparation method of diamond synthesis graphite stem stem |
| CN107188166A (en) * | 2017-06-26 | 2017-09-22 | 湖北鄂信钻石科技股份有限公司 | A kind of pyramid rhinestone and preparation method thereof |
-
2005
- 2005-02-25 CN CN 200510037860 patent/CN1686611A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829587A (en) * | 2010-05-28 | 2010-09-15 | 山东聊城昌润超硬材料有限公司 | Powdered catalyst for synthesizing octahedral diamond |
| CN101829587B (en) * | 2010-05-28 | 2011-08-10 | 山东聊城昌润超硬材料有限公司 | Powdered catalyst for synthesizing octahedral diamond |
| CN106270484A (en) * | 2016-08-18 | 2017-01-04 | 中南钻石有限公司 | A kind of preparation method of diamond synthesis graphite stem stem |
| CN106270484B (en) * | 2016-08-18 | 2019-01-15 | 中南钻石有限公司 | A kind of diamond synthesis preparation method of graphite stem |
| CN107188166A (en) * | 2017-06-26 | 2017-09-22 | 湖北鄂信钻石科技股份有限公司 | A kind of pyramid rhinestone and preparation method thereof |
| CN107188166B (en) * | 2017-06-26 | 2019-12-24 | 鄂信钻石新材料股份有限公司 | Pyramid-shaped artificial diamond and preparation method thereof |
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