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Catalyst powder for synthesis of boron-containing diamond and preparation method and application of catalyst powder

A technology of catalyst powder and boron diamond, which is applied in metal processing equipment, chemical instruments and methods, and ultra-high pressure processes, etc., can solve the problems of easy delamination, complicated process, and low density, so as to reduce the synthesis pressure, The effect of high yield and increased yield

Inactive Publication Date: 2018-06-08
BEIJING COMPO ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The carbon source selected for the synthesis of artificial diamond by powder process is scale-like graphite powder in microscopic appearance. The catalyst powder mixed with it is prepared by atomization method. The powder shape is mostly spherical or drop-shaped. During the preparation of the synthetic column, the near-spherical particles and the scaly graphite cannot be completely contacted, the density is not high during the pressing process, and the mixed material is easy to separate during transportation. Mixing and granulation, the process is more complicated

Method used

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  • Catalyst powder for synthesis of boron-containing diamond and preparation method and application of catalyst powder
  • Catalyst powder for synthesis of boron-containing diamond and preparation method and application of catalyst powder
  • Catalyst powder for synthesis of boron-containing diamond and preparation method and application of catalyst powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Ni 50 mn 45 Fe 4.9 B 0.1 Powder and its preparation method:

[0031] The ratio of the raw materials used is: 1000g of Ni block, 900g of manganese sheet, 100g of FeB (containing 2% boron) block, and 2g of carbon particle.

[0032] Preparation method: select a small-scale vacuum smelting and spinning equipment with a capacity of 2 kg, put the raw materials of the above weight in an intermediate frequency induction furnace for vacuum melting, and the vacuum degree is 5×10 -2 Above Pa, the melted alloy liquid is poured into the tundish preheated to 700-800°C, the alloy liquid flows down from the leak hole under the tundish, and the alloy liquid column flows down to the cooling copper roller rotating at high speed, and is Rapidly cooling and solidifying and throwing into a thin strip, by adjusting the cooling copper roll speed to 25 m / s, a thin strip with a thickness less than 50 μm is obtained, and the appearance of the prepared thin strip is as follows figure 1 shown;...

Embodiment 2

[0034] Ni 55 mn 40 Fe 4.9 B 0.1 Powder and its preparation method:

[0035] The ratio of the raw materials used is: 1100g of Ni blocks with a purity greater than 99.9%, 800g of manganese flakes, 100g of FeB (containing 2% boron) blocks, and 2g of carbon particles.

[0036] Preparation method: The preparation equipment is the same as in Example 1, and the vacuum degree of smelting is 5×10 -2 Above Pa, the melted alloy liquid is poured into the tundish preheated to 700-800°C, the alloy liquid flows down from the leak hole under the tundish, and the cooling copper roller speed is adjusted to 30 m / s to obtain a thin film with a thickness of less than 40 μm. belt; after collection, carry out embrittlement heat treatment under the protection of an inert atmosphere, break after cooling, and then sieve the obtained powder with a 100-mesh sieve, and the under-sieve is the obtained Ni 55 mn 40 Fe 4.9 B 0.1 Flake catalyst powder.

Embodiment 3

[0038] Ni 52 mn 42 Fe 5.88 B 0.12 Powder and its preparation method:

[0039] The raw material formula adopted is: 1040g of Ni blocks with a purity greater than 99.9%, 840g of manganese flakes, 120g of FeB (containing 2% boron) blocks, and 2g of carbon particles.

[0040] Preparation method: The preparation equipment is the same as in Example 1, and the vacuum degree of smelting is 5×10 -2 Above Pa, the melted alloy liquid is poured into the tundish preheated to 700-800°C, the alloy liquid flows down from the leak hole under the tundish, and the cooling copper roller speed is adjusted to 40 m / s to obtain a thin film with a thickness of less than 30 μm. belt; after collection, carry out embrittlement heat treatment under the protection of an inert atmosphere, break after cooling, and then sieve the obtained powder with a 100-mesh sieve, and the under-sieve is the obtained Ni 52 mn 42 Fe 5.88 B 0.12 Flake catalyst powder.

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Abstract

The invention relates to a catalyst powder for the synthesis of a boron-containing diamond and a preparation method and application of the catalyst powder. The composition of the powder is Ni(1-x-y-z)MnxFeyBz, wherein x is more than or equal to 40 and is less than or equal to 45, y is more than or equal to 4.9 and less than or equal to 5.88, and z is more than or equal to 0.1 and less than or equal to 0.12; the catalyst powder is sheet-like in morphology, and the granularity is less than or equal to 100 meshes. The catalyst powder is prepared from pure nickel, pure manganese, ferroboron containing 2% of boron, and a carbon granule as the raw materials, and is prepared through a melt spinning process. The catalyst powder is applied to preparation of the polycrystalline boron-containing diamond. The yield of the catalyst powder prepared through the method is high, the contact area between the catalyst powder and a graphite powder is large, the catalytic efficiency is high, the synthesispressure is reduced, and the yield of the synthesized boron-containing diamond is increased; the oxidation resistance temperature of the diamond produced through the catalyst powder is increased, theself-sharpening property is good, and the diamond is high in abrasive resistance.

Description

technical field [0001] The invention belongs to the technical field of powder preparation, and in particular relates to a catalyst powder for boron-containing diamond synthesis, a preparation method and an application thereof. Background technique [0002] Boron-containing diamond belongs to type IIb diamond, which has good wear resistance, oxidation resistance, thermal stability and excellent semiconductor performance, and is suitable for making semiconductor components used in harsh conditions such as high pressure, high temperature and strong magnetic field. Regarding the synthesis of boron-containing diamond, the superhard material industry at home and abroad has conducted a lot of research. The key issue is how to add boron, mainly around whether to choose boron-containing catalyst or boron-containing graphite as the raw material for diamond synthesis. Since it is easier to add boron or boron-containing alloys or compounds in the catalyst preparation process, the curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/02C22C19/03C22C1/03B22F1/00B22F9/04B01J3/06B01J35/00
CPCB01J3/06C22C1/023C22C1/03C22C19/005C22C19/03B01J23/8892B22F9/04B01J2203/068B01J2203/0655B22F2009/048B22F1/068B01J35/40
Inventor 贺会军赵文东赵新明盛艳伟张金辉贺宝杨铭边隽杰
Owner BEIJING COMPO ADVANCED TECH
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