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Accelerant for gem grade colorless diamond and preparation method thereof

A catalyst and diamond technology, applied in the field of synthetic diamond, can solve the problems of inability to obtain colorless diamonds, and achieve the effects of expanding solid solubility, smooth surface and high utilization rate

Inactive Publication Date: 2019-01-18
ZHONGNAN DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in large-scale mass production, colorless diamonds with a particle size of more than 4mm cannot be obtained

Method used

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  • Accelerant for gem grade colorless diamond and preparation method thereof
  • Accelerant for gem grade colorless diamond and preparation method thereof
  • Accelerant for gem grade colorless diamond and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The gem-grade colorless diamond catalyst of this embodiment includes the following raw materials in weight percentage: Fe 60%, Ni 25%, Co 0.1%, Si 0.1%, and rare earth element Ce 0.1%. The preparation method of the gem-grade colorless diamond catalyst includes the following steps: 1) melting and mixing; 2) gas atomization powder production, the atomization medium is nitrogen, the atomization pressure is 2.5MPa, and the alloy prepared by gas atomization The powder needs to pass through a 250-mesh sieve; 3) Primary pressing, using isostatic pressing; 4) Vacuum treatment, first heat the material in a vacuum furnace at 850°C for 6 hours, and then hold it at 980°C for 5 hours; 5) Secondary pressing.

Embodiment 2

[0041] The gem grade colorless diamond catalyst of the present embodiment comprises the following raw materials in weight percentage: Fe 80%, Ni 35%, Co1%, Si 0.5%, rare earth element Ce 0.8%;

[0042] The preparation method of catalyst is the same as embodiment 1.

Embodiment 3

[0044] The gem-grade colorless diamond catalyst formula of the present embodiment includes the following raw materials in weight percentage: Fe 70%, Ni 29.8%, Co 0.5%, Si 0.2%, rare earth element Ce 0.4%;

[0045] The preparation method of catalyst is the same as embodiment 1.

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Abstract

The invention belongs to the technical field of artificial diamonds and in particular relates to an accelerant for a gem grade colorless diamond and a preparation method thereof. The accelerant for the gem grade colorless diamond is powdery and is prepared from the following raw materials in percent by weight: 60-80% of Fe, 25-35% of Ni, greater than 0 but less than or equal to 1% of Co, greater than 0 but less than or equal to 0.5% of Si and greater than 0 but less than or equal to 0.8% of rare earth elements. The preparation method of the accelerant comprises the following steps: 1) meltingand mixing the raw materials; 2) carrying out gas atomization to prepare powder; 3) carrying out primary pressing; 4) carrying out vacuum treatment; and 5) carrying out secondary pressing. The accelerant used for prepare the colorless diamond is easy to produce, stable in structure of the diamond, good in catalytic effect, high in nitrogen removal effect, high in rate of finished products and highin practicality, and the product quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of artificial diamonds, in particular to a catalyst for gem-grade colorless diamonds and a preparation method thereof. Background technique [0002] Diamond is a kind of extreme functional material integrating multiple excellent properties. It is widely used in industry, science and technology, national defense, jewelry and other industries. In particular, high-quality colorless diamond crystals can be widely used in various jewelry and have broad application prospects. The existing known colorless diamonds mainly come from natural diamond mines, and the formation of natural diamonds takes hundreds of millions of years, the output is scarce, and the price is expensive. Long-term mining will cause the depletion of natural diamond resources, and the cost is extremely high. Therefore, there is an urgent need for the research and development of artificially synthesized colorless diamonds. [0003] Gem-grade c...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J3/06
CPCB01J3/06B01J23/83
Inventor 刘乾坤易良成赵鹏卢洋何文江申幸卫
Owner ZHONGNAN DIAMOND CO LTD
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