CN101829587B - Powdered catalyst for synthesizing octahedral diamond - Google Patents
Powdered catalyst for synthesizing octahedral diamond Download PDFInfo
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- CN101829587B CN101829587B CN2010101855314A CN201010185531A CN101829587B CN 101829587 B CN101829587 B CN 101829587B CN 2010101855314 A CN2010101855314 A CN 2010101855314A CN 201010185531 A CN201010185531 A CN 201010185531A CN 101829587 B CN101829587 B CN 101829587B
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Abstract
The invention discloses a powdered catalyst for synthesizing octahedral diamond. The powdered catalyst comprises the following alloy components by weight percentage: 3 to 7% of Nb, 3 to 5% of Mn, 2 to 2.5% of Co, 0.1 to 1% of Si, 0.5 to 1% of B4C, 0.02% of V and the balance of Fe. The preparation method of the powdered catalyst comprises the following steps of: firstly, preparing the alloy components according to the weight percentage, melting the materials and preparing the prefabricate alloy ingots in the protection of inert gases; secondly, re-melting the prefabricate alloy ingots; and finally, grinding and atomizing the metal fluid into the metal powder at the high pressure gas of 3 to 4.5 MPa, granulating the powder into spherical particles and sieving the prepared powder catalyst. Compared with the prior art, the catalyst for synthesizing the octahedral diamond improves the yielding by about 40 percent and improves the crystal form regularity of the diamond by about 35%. The content of the synthesized octahedron reaches 80 to 87%. The powdered catalyst of the invention has the oxygen content of not more than 100 PPm with uniform chemical ingredients; the particle has good spherical degree and the granularity is negative 200/positive 500; and the percentage of the granularity scale is 75 to 95%.
Description
Technical field
The present invention relates to the powder catalyst that the diamond synthesis product uses, is a kind of powdered catalyst for synthesizing octahedral diamond.
Background technology
Catalyst is indispensable raw material in adamantine synthesis technique, the catalyst difference of using when diamond synthesis is wished to get different crystal forms.At present, the powder catalyst that in synthesizing octahedral diamond technology, uses, general is primary raw material with the iron of 65-70% and the nickel of 30-35%, though this catalyst has certain advantage when synthesizing other crystal formation diamond, but then be prone to more deficiency when synthesizing octahedral diamond: synthesising stability is relatively poor, yield poorly, poor crystal form, octahedra content are not enough etc.; Because above-mentioned deficiency causes the synthetic cost of octahedral diamond higher relatively, can not form large-scale production.Because octahedral diamond has sharpness height, good, the hardness advantages of higher of self-sharpening, it is the preferred material of making grinding tool such as high-precision, efficient, therefore, under the situation that the output of octahedral diamond can't improve, the production cost of octahedral diamond can't reduce, thereby influences the production efficiency of down-stream enterprise.
Summary of the invention
The objective of the invention is, a kind of powdered catalyst for synthesizing octahedral diamond is provided, make it solve the deficiency of prior art, thereby increase the output of octahedral diamond.
The present invention is achieved through the following technical solutions for achieving the above object: a kind of powdered catalyst for synthesizing octahedral diamond, by weight percentage, its alloying component is: Nb3-7%, Mn 3-5%, C
O2-2.5%, Si 0.1-1%, B
4C 0.5-1%, V 0.02%, surplus is Fe.
Powder catalyst of the present invention by weight percentage, its alloying component is: Nb 5%, Mn 4%, C
O2%, Si 0.5%, B
4C 0.75%, V 0.02%, surplus is Fe.
Powder catalyst of the present invention by weight percentage, its alloying component is: Nb 7%, Mn 5%, C
O2.5%, Si1%, B
4C 1%, V 0.02%, surplus is Fe.
Powder catalyst of the present invention by weight percentage, its alloying component is: Nb 3%, Mn 3%, C
O2%, Si 0.1%, B
4C 0.5%, V 0.02%, surplus is Fe.
Add Mn, V and C in the powder catalyst component of the present invention
O, can reduce the oxygen content in the catalyst, oxygen content is reached≤100PPm, increase the catalyst activity function, reduce the octahedra temperature that generates of diamond, help the conversion of octahedral diamond.Particularly V, CO are as the alternate active element of diamond and graphite, can promote that growth of diamond speeds up, when promoting that diamond film speeds up, the Mn that adds can promote the speed of growth of the different crystal faces of diamond, diamond is transformed, guarantee fund's hard rock homogeneous nucleation to octahedron.For the octahedral crystal formation of diamond is transformed, and short its high-quality growth, in component, added Nb and B
4C.Si in the component of the present invention uses as the promoter of non-spontaneous nucleation, can bring out and promote the non-spontaneous nucleation of diamond face in octahedral diamond is synthetic, can improve adamantine nucleation rate and output.
After each element combinations of powder catalyst of the present invention, can improve the synthesising stability of octahedral diamond.Owing to need use 1290 ℃ of left and right sides high temperature during with existing catalyst synthesizing octahedral diamond, make devices such as the heating tube that in synthetic, uses and heating plate easy generation unstability under this temperature, component of the present invention can reduce the oxygen content in the catalyst, increase the catalyst activity function, make the catalyst fusing point reach 1200-1210 ℃, thereby the generation temperature that has reduced octahedral diamond has guaranteed the stability in the building-up process at 1230 ℃.Can improve output about 40% than prior art with catalyst synthesizing octahedral diamond of the present invention, and adamantine crystal formation rule degree improved about 35%, synthetic octahedra content can reach 80-87%.Powder catalyst oxygen content≤100PPm of the present invention, chemical composition is even, and particle ball-type degree is good, and particle size range is-200/+500 that the ratio of this particle size range is 75-95%.
The specific embodiment
Embodiment
Powder catalyst of the present invention by weight percentage, its alloying component can have multiple combination, for example:
1, Nb 7%, Mn 5%, CO 2.5%, Si1%, B
4C 1%, V 0.02%, surplus is Fe.
2, Nb 5%, Mn 4%, CO 2.2%, Si 0.8%, B
4C 1%, V 0.02%, surplus is Fe.
3, Nb 3%, Mn 3%, CO 2%, Si 0.1%, B
4C 0.5%, V 0.02%, surplus is Fe.
4, Nb 5%, Mn 4%, CO 2%, Si 0.5%, B
4C 0.75%, V 0.02%, surplus is Fe.
The preparation method of the invention described above powder catalyst is as follows: by weight percentage, get the batching alloying component be: Nb3-7%, Mn 3-5%, C
O2-2.5%, Si 0.1+1%, B
4C 0.5-1%, V 0.02%, surplus is Fe.
After preparing in proportion; the thawing of will preparing burden under the protection of inert gas is prepared into the prealloy ingot, then with the remelting under 1350-1500 ℃ of temperature of prealloy ingot; feed nitrogen in the reflow process, utilize gases at high pressure 3-4.5Mpa that metal liquid stream is smashed at last and be atomized into metal dust.The catalyst powder degree of making mostly is 100 orders with carefully, and 500 orders are with slightly, the particle balling preparation shape.
Sieve at last, the catalyst powder of preparation is sieved, select granularity to use for-200/+500, this particle size range material ratio is at 75%-95%.
Claims (4)
1. powdered catalyst for synthesizing octahedral diamond, it is characterized in that: by weight percentage, its alloying component is: Nb3-7%, Mn 3-5%, Co 2-2.5%, Si 0.1-1%, B
4C 0.5-1%, V 0.02%, surplus is Fe.
2. a kind of powdered catalyst for synthesizing octahedral diamond according to claim 1 is characterized in that: by weight percentage, its alloying component is: Nb 5%, Mn 4%, Co 2%, Si 0.5%, B
4C 0.75%, V 0.02%, surplus is Fe.
3. a kind of powdered catalyst for synthesizing octahedral diamond according to claim 1 is characterized in that: by weight percentage, its alloying component is: Nb 7%, Mn 5%, Co 2.5%, Si1%, B
4C 1%, V 0.02%, surplus is Fe.
4. a kind of powdered catalyst for synthesizing octahedral diamond according to claim 1 is characterized in that: by weight percentage, its alloying component is: Nb 3%, Mn 3%, Co 2%, Si 0.1%, B
4C 0.5%, V 0.02%, surplus is Fe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101855314A CN101829587B (en) | 2010-05-28 | 2010-05-28 | Powdered catalyst for synthesizing octahedral diamond |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101855314A CN101829587B (en) | 2010-05-28 | 2010-05-28 | Powdered catalyst for synthesizing octahedral diamond |
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| CN101829587A CN101829587A (en) | 2010-09-15 |
| CN101829587B true CN101829587B (en) | 2011-08-10 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103566830B (en) * | 2013-03-11 | 2015-07-08 | 河南省力量新材料有限公司 | Synthesis method of octahedron diamond |
| CN104226355B (en) * | 2014-09-12 | 2016-09-14 | 河南省力量钻石股份有限公司 | A kind of synthesizing superfine particles diamonds powder catalyst |
| CN104264210B (en) * | 2014-09-12 | 2016-08-24 | 河南省力量钻石股份有限公司 | A kind of synthetic method of ultra-fine grain diamond single crystal |
| CN105903470A (en) * | 2016-06-13 | 2016-08-31 | 安庆市凯立金刚石科技有限公司 | Catalytic agent for carbon fiber diamond synthesis |
| CN109078581B (en) * | 2018-08-29 | 2020-07-07 | 中南钻石有限公司 | Catalyst alloy powder, surface groove-shaped diamond prepared from catalyst alloy powder, preparation method and application |
| CN112064120B (en) * | 2020-08-13 | 2021-09-03 | 中南钻石有限公司 | Seed crystal for large-size cultivation of diamond and preparation method thereof |
| CN115007068B (en) * | 2022-06-17 | 2024-07-09 | 山东昌润钻石股份有限公司 | Synthesis method of octahedral diamond |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6129900A (en) * | 1991-02-15 | 2000-10-10 | Sumitomo Electric Industries, Ltd. | Process for the synthesis of diamond |
| CN1428195A (en) * | 2001-12-26 | 2003-07-09 | 北京有色金属研究总院 | Power catalyst for synthesizing fine grainsize diamond |
| CN1686611A (en) * | 2005-02-25 | 2005-10-26 | 江苏工业学院 | Powdered catalyst for synthesizing diamond containing oxide |
| CN1903429A (en) * | 2005-07-25 | 2007-01-31 | 北京有色金属研究总院 | Powder catalyst for synthesizing high strength and excellent quality diamond with low prodn. cost |
| CN101024155A (en) * | 2007-01-16 | 2007-08-29 | 山东建筑大学 | Powdered metallurgy catalyst for synthesizing high-strength diamond |
-
2010
- 2010-05-28 CN CN2010101855314A patent/CN101829587B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6129900A (en) * | 1991-02-15 | 2000-10-10 | Sumitomo Electric Industries, Ltd. | Process for the synthesis of diamond |
| CN1428195A (en) * | 2001-12-26 | 2003-07-09 | 北京有色金属研究总院 | Power catalyst for synthesizing fine grainsize diamond |
| CN1686611A (en) * | 2005-02-25 | 2005-10-26 | 江苏工业学院 | Powdered catalyst for synthesizing diamond containing oxide |
| CN1903429A (en) * | 2005-07-25 | 2007-01-31 | 北京有色金属研究总院 | Powder catalyst for synthesizing high strength and excellent quality diamond with low prodn. cost |
| CN101024155A (en) * | 2007-01-16 | 2007-08-29 | 山东建筑大学 | Powdered metallurgy catalyst for synthesizing high-strength diamond |
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Owner name: SHANDONG CHANGRUN DIAMOND CO., LTD. Free format text: FORMER NAME: SHANDONG LIAOCHENG CHANGRUN SUPERHARD MATERIAL CO., LTD. |
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Address after: 252000 Shandong city of Liaocheng province Wei Yuk Road No. 45 Patentee after: Shandong Changrun Diamond Co., Ltd. Address before: 252000 No. 45, Bei Wei Yu Bei Road, Shandong, Liaocheng Patentee before: GEMS Superabrasives Co., Ltd. |