CN1428195A - Power catalyst for synthesizing fine grainsize diamond - Google Patents
Power catalyst for synthesizing fine grainsize diamond Download PDFInfo
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- CN1428195A CN1428195A CN 01144858 CN01144858A CN1428195A CN 1428195 A CN1428195 A CN 1428195A CN 01144858 CN01144858 CN 01144858 CN 01144858 A CN01144858 A CN 01144858A CN 1428195 A CN1428195 A CN 1428195A
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Abstract
The present invention relates to a powder catalyst for synthesizing fine-grained diamond, and its alloy components are (wt%): Mn 24-26%, Co 4.5-5.5%, added trace elements C, Al, N and C 0.6-2.0%, Al 0.02-0.2%, N 50-100 ppm and the rest is Ni. Said powder catalyst is prepared by adopting quick-cooling atomization method, its powder granule is made into spherical form or near-spherical form, its oxygen content is less than or equal to 200 ppm, its chemical component is uniform, and the yield of the power whose grain size range is -100/+500 meshes can be up to 80%. Said invention is suitable for production of fine-grained diamond.
Description
Technical field
The present invention relates to powdered catalyst for synthesizing diamond, a kind of power catalyst for synthesizing fine grainsize diamond that is used for of more specifically saying so.
Background technology
Under high-temperature and high-pressure conditions, graphite carries out in the transforming process some materials being arranged usually to diamond, makes adamantine phase transformation activation energy, synthesis temperature and pressure all significantly reduce, and such material is referred to as CATALYST MATERIAL FOR ARTIFICIAL DIAMOND, is called for short catalyst.Under the situation that does not have catalyst to participate in, graphite transforms high pressure and the high temperature more than 2700 ℃ that diamond needs 13GPa.If adopt catalyst material, can make adamantine synthesis pressure and temperature reduce to 5-6GPa and 1200-1400 ℃ respectively, thereby make the industrial production diamond become possibility.High strength coarse granule diamond and high yield and high quality fine-granularity diamond are two general orientation of Future Development.Wherein the market prospects of fine-granularity diamond are very wide, and it is the desirable feedstock of making metal-bonded diamond goods such as glomerocryst, composite sheet, plated item, micro mist, but present widely used slice catalyst synthesizing fine-granularity diamond is very difficult.
Chinese patent CN1061918 has reported a kind of " powdered carbonide catalysis for synthesizing fine-granularity diamond ", its chemical composition, and weight percentage is, C:1-20%, Mn:0-20%, Co:0-4%, surplus is nickel and trace impurity.This powder catalyst adopts the powder process of vacuum melting---turning---crushing process, and the powdery pattern is irregular.
Summary of the invention
The purpose of this invention is to provide a kind of power catalyst for synthesizing fine grainsize diamond, this powder catalyst contact area is big, can fully mix with the graphite powder, can increase substantially synthetic per unit area yield and product quality, and improves the grade of diamond.
For achieving the above object, the present invention takes following technical scheme: this power catalyst for synthesizing fine grainsize diamond, and percentage meter by weight, its alloying component is Mn:24-26%, Co:4.5-5.5%, C:0.6-2.0%, Al:0.02-0.2%, N:50-150PPm, surplus is Ni.
The alloying component optimum range of power catalyst for synthesizing fine grainsize diamond of the present invention is: percentage meter by weight, its alloying component is Mn:24.5-25.5%, Co:4.7-5.1%, C:0.6-1.8%, Al:0.1-0.2%, N:50-100PPm, surplus is metal Ni.
The particle of power catalyst for synthesizing fine grainsize diamond of the present invention is spherical in shape, sees Fig. 1, and its fusing point is 1224 ℃, and nitrogen, oxygen analysis result show that nitrogen content is 100PPm, oxygen content≤200PPm.
The preparation method of power catalyst for synthesizing fine grainsize diamond of the present invention comprises the steps:
(1) batching; by weight percentage; the food ingredient of alloy is Mn:24-26%, Co:4.5-5.5%, C:0.6-2.0%; Al:0.02-0.2%, surplus are metal Ni; (2) fusing of will preparing burden under the protection of inert gas atmosphere is prepared into the prealloy ingot, then with the remelting under 1400-1600 ℃ of temperature of prealloy ingot; feed nitrogen in the reflow process and mix N, utilize gases at high pressure (1.5-4.5MPa) that metal liquid stream is smashed at last and be atomized into alloy powder.
Advantage of the present invention is:
1, compares with slice catalyst, powder catalyst can fully mix with the graphite powder, contact area is big, can increase substantially synthetic per unit area yield and product quality, compare with the technology of graphite diamond synthesis with traditional slice catalyst, using powder catalyst and graphite diamond synthesis, is an innovation to the diamond synthetic technology.
2, powder catalyst oxygen content≤200PPm of the present invention, chemical composition is even, the good sphericity (see figure 1).Tiny and the isotropism of crystal grain helps adamantine forming core and grows up.Adopt this powder diamond synthesis can effectively control the generation that connects glomerocryst in the diamond building-up process, symmetry is good, and the transparency height improves the grade of diamond and sees Fig. 2.
3, catalytic alloy powder of the present invention adopts fast cold atomization process method preparation, cooling velocity fast (10
3-10
4K/s), guaranteed that powder catalyst of the present invention has higher phosphorus content, and be evenly distributed, the existence of solid solution carbon has increased the diffusion channel of carbon to the solvent catalyst, help the supply of carbon source, nucleation rate increases in the diamond building-up process thereby make, and be evenly distributed, help forming fine-granularity diamond, and increase substantially synthetic per unit area yield, reduce production costs, (as: the synthetic per unit area yield of the synthetic cavity of φ 23mm is brought up to 15-16ct by 10ct), the nitrogen content of control powder catalyst is at 50-100PPm, and nitrogen is distributed in the colour center in the diamond, makes diamond be yellow.
4, the synthetic fine-granularity diamond of powder catalyst of the present invention is the product of present international market demand, can make enterprise obtain good economic benefit.
Description of drawings
Fig. 1 is the ESEM pattern photo of powder catalyst
Fig. 2 is for adopting powder catalyst of the present invention and the adamantine ESEM pattern of the mixed synthetic fine grained of graphite powder photo
The specific embodiment
Below the present invention is further illustrated with embodiment, will help product preparation method of the present invention and advantage thereof are done further to understand.Protection scope of the present invention is not subjected to the qualification of these embodiment, and protection scope of the present invention is limited by claims.
Embodiment 1
A kind of power catalyst for synthesizing fine grainsize diamond in the present embodiment, percentage meter by weight, its alloying ingredient composition is Mn:25%, Co:5%, C:0.8%, Al:0.1%, surplus are Ni.Take by weighing purity and be 99.90% manganese, cobalt, nickel, aluminium and high pure carbon batching, adopt the gases at high pressure atomization technique, with the inert gas is that atomization gas atomizes, prepare powder catalyst, prepared powder catalyst chemical composition is even, good sphericity ,-100/+500 purpose flour extraction can reach more than 80%.
The powder catalyst that makes is analyzed, and its alloyed powder composition is Mn:24.7%, Co:4.96%, C:0.78%, Al:0.1%, N:100PPm, and surplus is Ni.
Adopt particle size range to mix by a certain percentage with graphite powder at-100/+500 purpose powder catalyst, diamond synthesis in the synthetic cavity of φ 23mm, synthetic per unit area yield can reach 15-16ct, the granularity peak value is at-140/+170 order, between-170/+200 the order, the I moulding mixture is less than 10%, and the II moulding mixture accounts for 10%, III, IV moulding mixture account for more than 30%, can bring good economic benefit for enterprise.
Embodiment 2
Its equipment and method of operating be substantially with embodiment 1, uniquely be not both, and percentage meter by weight, the food ingredient of its alloy is: Mn:25%, Co:5%, C:1.2%, Al:0.2%, surplus are Ni.
The powder catalyst that makes is analyzed, and its alloyed powder composition is Mn:24.8%, Co:4.98%, C:1.36%, Al:0.2%, N:80PPm, and surplus is Ni.
Employing-100/+500 purpose powder catalyst mixes by a certain percentage with graphite powder, diamond synthesis in the synthetic cavity of φ 23mm, synthetic per unit area yield can reach 15-16ct, the granularity peak value is at-170/+200 order, between-200/+230 the order, the I moulding mixture is less than 10%, and the II moulding mixture accounts for 15%, and III, IV moulding mixture account for more than 30%.
Embodiment 3
Its equipment and method of operating are substantially with embodiment 1, and being about to batching fusing back is that atomization gas atomizes with the inert gas, produces novel power catalyst for synthesizing fine grainsize diamond.Uniquely different be, percentage meter by weight, the food ingredient of its alloy is: Mn:25%, Co:5%, C:1.8%, Al:0.2%, surplus are Ni.
The powder catalyst that makes is analyzed, and its alloyed powder composition is Mn:24.75%, Co:4.97%, C:1.75%, Al:0.2%, N:84PPm, and surplus is Ni.
Employing-100/+500 purpose powder catalyst mixes by a certain percentage with graphite powder, diamond synthesis in the synthetic cavity of φ 23mm, synthetic per unit area yield can reach 15-16ct, the granularity peak value is at-170/+200 order, between-200/+230 the order, the I moulding mixture is less than 10%, and the II moulding mixture accounts for 12%, and III, IV moulding mixture account for more than 30%.
In sum, the particle of power catalyst for synthesizing fine grainsize diamond of the present invention is spherical in shape, and oxygen content is low ,≤200PPm, and chemical composition is even, and particle size range-100/+500 order flour extraction can reach 80%, be suitable for the production of high yield fine-granularity diamond.This primary monocrystalline fine grained diamond is to be used for optical glass, aeronautical glasses, bulletproof glass, vitreous ceramic, the superhard material that crisp and hard material fine grinding such as special cermacis, fused alumina zirconia, stone material and attrition process instrument are used.Can be used for making grinding tool, bistrique, abrasive material and plating tool etc.
Claims (3)
1, a kind of power catalyst for synthesizing fine grainsize diamond is characterized in that: percentage meter by weight, and its alloying component is Mn:24-26%, Co:4.5-5.5%, C:0.6-2.0%, Al:0.02-0.2%, N:50-150PPm, surplus is Ni.
2, power catalyst for synthesizing fine grainsize diamond according to claim 1, it is characterized in that: percentage meter by weight, its alloying component is Mn:24.5-25.5%, Co:4.7-5.1%, C:0.6-1.8%, Al:0.1-0.2%, N:50-100PPm, and surplus is good for metal Ni.
3, power catalyst for synthesizing fine grainsize diamond according to claim 1 and 2 is characterized in that: described powder catalyst particle is spherical in shape or class is spherical.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 01144858 CN1230250C (en) | 2001-12-26 | 2001-12-26 | Power catalyst for synthesizing fine grainsize diamond |
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|---|---|---|---|
| CN 01144858 CN1230250C (en) | 2001-12-26 | 2001-12-26 | Power catalyst for synthesizing fine grainsize diamond |
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| CN1428195A true CN1428195A (en) | 2003-07-09 |
| CN1230250C CN1230250C (en) | 2005-12-07 |
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| CN 01144858 Expired - Fee Related CN1230250C (en) | 2001-12-26 | 2001-12-26 | Power catalyst for synthesizing fine grainsize diamond |
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Cited By (5)
| 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 |
| CN101837267A (en) * | 2010-06-02 | 2010-09-22 | 山东聊城昌润超硬材料有限公司 | Prismatic crystal diamond synthesizing process |
| CN104226355A (en) * | 2014-09-12 | 2014-12-24 | 河南省力量新材料有限公司 | Powder catalyst for synthesizing ultrafine granular diamond |
| 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 |
| CN109701447A (en) * | 2019-03-07 | 2019-05-03 | 吉林大学 | A method of the low pressure of no catalyst prepares nano polycrystal diamond |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400149C (en) * | 2007-01-16 | 2008-07-09 | 山东建筑大学 | Powdered metallurgy catalyst for synthesizing high-strength diamond |
-
2001
- 2001-12-26 CN CN 01144858 patent/CN1230250C/en not_active Expired - Fee Related
Cited By (9)
| 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 |
| CN101837267A (en) * | 2010-06-02 | 2010-09-22 | 山东聊城昌润超硬材料有限公司 | Prismatic crystal diamond synthesizing process |
| CN101837267B (en) * | 2010-06-02 | 2012-05-02 | 山东聊城昌润超硬材料有限公司 | Prismatic crystal diamond synthesizing process |
| CN104226355A (en) * | 2014-09-12 | 2014-12-24 | 河南省力量新材料有限公司 | Powder catalyst for synthesizing ultrafine granular diamond |
| 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 |
| 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 |
| CN109701447A (en) * | 2019-03-07 | 2019-05-03 | 吉林大学 | A method of the low pressure of no catalyst prepares nano polycrystal diamond |
| CN109701447B (en) * | 2019-03-07 | 2021-05-07 | 吉林大学 | Method for preparing nano polycrystalline diamond under low pressure without catalyst |
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| CN1230250C (en) | 2005-12-07 |
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