Powdered catalyst for high self-sharpening diamond and preparation method thereof

Abstract

The invention discloses a powdered catalyst for high self-sharpening diamond and a preparation method thereof. The powdered catalyst consists of the following raw materials in percentage by weight: 15 to 25 percent of Ni, 5 to 10 percent of Cu, 3 to 8 percent of Mn, 0.005 to 0.05 percent of Cr, 0.002 to 0.02 percent of V, 0.003 to 0.03 percent of Ce, 100 to 150PPm of N, 80 to 150PPm of O and the balance of Fe. The preparation method comprises the following steps of: putting the raw materials into an intermediate frequency furnace, melting the raw materials into pre-alloyed ingots under the protection of inert gas, crushing and atomizing the metal fluid into metal powder by using high-pressure gas, and putting the obtained spherical catalyst powder into a vacuum furnace to obtain a metal catalyst containing 380 to 420PPm of oxygen; putting the obtained catalyst powder into the vacuum furnace to obtain catalyst powder of which the surface nitriding layer thickness is 0.0087 to 0.0095 millimeter, the oxygen content is 80 to 150PPm and the nitrogen content is 100 to 150PPm; and screening the obtained powdered catalyst to obtain a product. When the catalyst of the invention is used for synthesizing the diamond, the diamond has complete crystal form and contains more spot impurity, and the self-sharpening of the diamond is greatly improved.

Description

technical field [0001] The invention relates to a powder catalyst used in the synthetic diamond process, which is a powder catalyst for high self-sharpening diamond used in the process of synthesizing high self-sharpening diamond and a preparation method thereof. Background technique [0002] Powder catalyst is an essential raw material in the diamond synthesis process. Different performance powder catalysts have a great influence on the performance and use of diamond in the diamond synthesis process. With the continuous improvement of the application level of diamond in single crystal control technology, the requirements for self-sharpening of diamond also increase. Since the self-sharpening property of diamond synthesized by the usual catalyst is poor, those skilled in the art make the catalyst into a sheet to solve the problem of poor self-sharpening property of the diamond. However, the yield of this sheet-shaped catalyst is low, resulting in high production costs. At t...

AI Technical Summary

Problems solved by technology

Due to the poor self-sharpness of diamond synthesized by the usual catalyst, those skilled in the art make the catalyst into flakes to solve the problem of poor self-sharpness of diamond

However, the yield of this sheet-shaped catalyst is low, resulting in high production costs. At the same time, the output after diamond synthesis is low, making it difficult to accept the technology of using sheet-shaped catalysts to improve the self-sharpening performance of diamonds.

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