Iron-based powder catalyst for synthesizing superfine particle diamond

A technology of iron-based powder and ultra-fine particles, which is applied in the field of iron-based powder catalysts for the synthesis of ultra-fine diamonds, which can solve the problems of high cost, achieve low prices, improve quality, and improve economic benefits

Inactive Publication Date: 2016-02-03
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst uses Ni-based metal as the main raw material, although the crystal quality of diamond can be controlled, but the cost is relatively high

Method used

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  • Iron-based powder catalyst for synthesizing superfine particle diamond

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Embodiment 1

[0020] In this embodiment, an iron-based powder catalyst for synthesizing ultrafine-grained diamonds comprises 25% by weight of Mn, 15% of Ni, and 10% of Zn, with the balance being Fe.

[0021] During preparation, the raw materials are prepared according to the formula, and the prepared raw materials are put into an argon-protected intermediate frequency furnace for melting and refining. The powdered alloy was prepared by high-pressure gas atomization process. The powdered alloy is sieved, and the powdered alloy with a particle size of 400 meshes is selected as a product. The screened powdered alloy is placed in a hydrogen reduction furnace for reduction. The catalyst alloy powder and graphite powder are evenly mixed in a certain proportion, and after high temperature treatment, the diamond is synthesized. The proportion of synthetic diamond particles with a particle size of ≤400 mesh accounts for about 82%, with high crystal integrity and good transparency.

Embodiment 2

[0023] The composition and preparation method of the catalytic alloy are basically the same as those in Example 1, except that the powdered alloy with a particle size of 500 meshes is selected as the product to synthesize diamond by sieving. The proportion of synthetic diamond particles with a particle size of ≤400 mesh accounts for about 85.3%, with high crystal integrity and good transparency.

Embodiment 3

[0025] Its preparation method is basically the same as Example 1, and the difference is that, by weight percentage, the catalyst alloy ingredients are: Mn30%, Ni10%, Zn8%, and the balance is Fe. Products Synthetic Diamond. The proportion of synthetic diamond particles with a particle size of ≤400 mesh accounts for about 87.6%, with high crystal integrity and good transparency.

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Abstract

The invention discloses an iron-based powder catalyst for synthesizing superfine particle diamond. The iron-based powder catalyst comprises the following alloy components in percentage by weight: 25 percent to 40 percent of Mn (manganese), 5 percent to 15 percent of Ni (nickel), 2 percent to 10 percent of Zn (zinc) and the balance of Fe (ferric). The iron-based powder catalyst has the advantages that the electron theory is used for instructing to select the main components of the catalyst alloy, the product sphericity is good, the chemical components are uniform, and the powder yield rate of 400 to 600 mesh granularity is not less than 80 percent; the percentage of 400-mesh diamond synthesized by the powder catalyst is not less than 85 percent, the integrity of diamond crystal is high, and the transparency degree is good; compared with the existing nickel-based catalyst for synthesizing the fine-particle diamond, the production cost of the iron-based powder catalyst disclosed by the invention is obviously reduced, and the economic benefit is obvious.

Description

technical field [0001] The invention relates to an iron-based powder catalyst for synthesizing ultrafine particle diamond. Background technique [0002] In the industry, diamonds finer than 400 mesh are called ultra-fine diamonds. Compared with diamond single crystals of the same particle size that have been crushed and reshaped, artificially synthesized ultra-fine diamond single crystals with complete crystal shapes have complete crystal shapes and fewer internal defects. It has a series of advantages such as high thermal stability, and has irreplaceable advantages of other materials in semi-finishing, finishing, high-finishing and precision polishing. There are many factors that affect the particle size of synthetic diamond. Among them, the catalyst, as an essential raw material for synthetic diamond, can effectively reduce the synthesis temperature and pressure of diamond, and has a decisive impact on the particle size and performance of diamond. However, the diamond par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J3/06
Inventor 李丽王建民高术振
Owner HEBEI UNIV OF ENG
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