Powder catalyst, as one of the raw materials for synthesizing diamonds, significantly impacts the overall quality and yield of synthetic diamonds. It can be said that powder catalyst is the catalyst for diamond synthesis, and its characteristics directly affect the yield and quality of diamonds.

The key characteristics of powder catalyst influence the yield and quality of synthetic diamonds in the following aspects:

Oxygen Content

    As the oxygen content of the powder catalyst continuously increases, the single-batch yield (i.e., production quantity) will gradually decrease.

    The color of the synthesized single crystal will also gradually turn grayish.

    Its particle size and peak value will gradually decrease.

    During the manufacturing process, powder catalysts have a relatively large surface area, making them prone to adsorbing oxygen or moisture, thereby increasing their reaction potential. When some substances react, they produce corresponding oxides. These oxides are difficult to remove and cannot effectively facilitate carbon dissolution and catalytic action during the synthesis process, thus damaging the stability of synthesized diamonds and significantly affecting their quality.

Nickel (Ni) Content

    As the Ni content of the powder catalyst increases, the metal will possess a certain electronic or geometric structure under catalytic action.

    Generally, under relatively high-temperature conditions, elemental Ni and carbon do not easily form stable compounds.

    Cobalt (Co) achieves a relatively moderate condition for carbon solubility.

    The fewer electrons it exhibits, the stronger its carbon-dissolving ability.

    If the iron content relatively increases, the growth rate of diamond single crystals will increase.

    Differences in the nickel content of the powder catalyst will affect the quality of synthesized diamonds.

Particle Size (Granularity)

    If the particle size of the powder catalyst is coarse and unevenly distributed, it will lead to a lack of overall uniformity when mixed with graphite powder.

    This will prevent the "diamond film" from providing a relatively stable state for the synthesized single crystal, thereby affecting the quality of the synthesized diamond.

    To produce higher quality synthetic diamonds, the "diamond film" must ensure its thickness and physical properties remain unchanged during the synthesis process.

In summary, the oxygen content, nickel content, and particle size of the powder catalyst all have a certain impact on the subsequent yield and quality of synthesized diamonds. Therefore, in production, close attention must be paid to the control of these three factors.