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Powder catalyst for synthesizing high strength and excellent quality diamond with low prodn. cost

A low-cost, diamond technology, applied in the application of ultra-high pressure process, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of low diamond output rate and inability to synthesize diamond, etc. problem, to achieve the effect of strengthening interaction, reducing oxygen content, and reducing raw material cost

Inactive Publication Date: 2007-01-31
石门县顺超科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic diamond industry generally uses flaky NiMnCo catalysts, and the output rate of coarse-grained, high-strength diamonds is extremely low, and it is impossible to synthesize diamonds weighing more than 20kg.

Method used

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  • Powder catalyst for synthesizing high strength and excellent quality diamond with low prodn. cost
  • Powder catalyst for synthesizing high strength and excellent quality diamond with low prodn. cost
  • Powder catalyst for synthesizing high strength and excellent quality diamond with low prodn. cost

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A powder catalyst for synthesizing coarse-grained, high-strength diamonds in this embodiment has an alloy ingredient composition of Ni: 30%, Mn: 0.2%, C: 0.2%, and the balance is Fe.

[0025] Weigh the ingredients of Ni, Fe, and Mn with a purity of 99.9%, melt the ingredients in an intermediate frequency induction furnace under the protection of inert gas, and prepare a powder catalyst for synthetic diamond by vacuum / inert gas atomization technology. The obtained new powder catalyst was analyzed, and the composition of the alloy powder was Ni: 29.8%, Mn: 0.16%, C: 0.18%, N: 150PPm, O: 120PPm, and the balance was Fe.

[0026] The alloy is sieved, and the alloy powder with a particle size range of -200 mesh is uniformly mixed with graphite powder in a certain proportion, and the diamond is synthesized under a certain pressure and temperature. The proportion of particle size ≥ 60 mesh accounts for more than 70%, of which 40 / 45 mesh diamond The performance is shown in Table...

Embodiment 2

[0028] Its equipment and operation method are basically the same as in Example 1, the only difference is that, by weight percentage, the ingredients of the alloy are: Ni: 30%, Mn: 0.3%, C: 0.2%, Cr: 0.02%, and the balance For Fe.

[0029] The obtained new powder catalyst was analyzed, and the composition of the alloy powder was Ni: 29.92%, Mn: 0.28%, C: 0.18%, Cr: 0.018%, N: 160PPm, O: 150PPm, and the balance was Fe.

[0030] The alloy powder with a size of -200 mesh and graphite powder are mixed evenly in a certain proportion, and diamonds are synthesized under a certain pressure and temperature. The proportion of particle size ≥ 60 mesh accounts for more than 70%. The properties of 40 / 45 mesh diamonds are shown in Table 1.

Embodiment 3

[0032] Its equipment and operation method are basically the same as in Example 1, the only difference is that, by weight percentage, the ingredients of the alloy are: Ni: 25%, Mn: 0.2%, C: 0.4%, and the balance is Fe.

[0033] After the ingredients are melted, the prefabricated alloy ingots are poured immediately, and then the prefabricated alloy ingots are melted, and a new type of powder catalyst for synthesizing coarse particles and high-strength diamonds is prepared by vacuum / inert gas atomization technology.

[0034] The obtained new powder catalyst was analyzed, and the composition of the alloy powder was Ni: 24.75%, Mn: 0.16%, C: 0.38%, N: 120PPm, O: 120PPm, and the balance was Fe.

[0035] The alloy powder with a particle size range of -150 mesh and graphite powder are mixed evenly in a certain proportion, and diamonds are synthesized under a certain pressure and temperature. The proportion of particle size ≥ 60 mesh accounts for more than 70%.

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Abstract

A powdered catalyst for synthesizing high-strength and high-quality diamond with low cost contains proportionally Ni, Mn, C, N, O, one or more of Cr, Ce and Si, and Fe. The resultant diamond has high output rate, integrity, transparency and thermal stability.

Description

technical field [0001] The invention relates to a powder catalyst for synthetic diamond, more specifically a low-cost, high-strength, high-quality diamond powder catalyst. Background technique [0002] At present, the catalyst materials commonly used in the production of diamond mainly include nickel-based, iron-based and cobalt-based alloys. Cobalt-based catalysts have good melting performance, but are expensive and are rarely used in China. The yield of diamond synthesized by nickel-based catalyst is slightly lower, but the resulting diamond has a good crystal shape, less impurities inside the crystal, weak magnetism, and high compressive strength; iron-based catalyst has high activity, high synthesis yield, strong carbon-dissolving ability, and relatively high synthesis parameters. it is good. At present, the domestic diamond industry generally uses flaky NiMnCo catalysts, and the output rate of coarse-grained, high-strength diamonds is extremely low, and diamonds weighi...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J3/06
Inventor 郭宏徐骏马自力石力开徐柱天杨必成张习敏
Owner 石门县顺超科技发展有限公司
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