Strength of Single Crystal Raw Material
The strength of diamond micropowder is related to the single crystal raw material used and the production process. Generally speaking, the higher the strength of the diamond raw material, the higher the strength of the resulting diamond micropowder.
Single Crystal Raw Material Synthesis Time
Diamond is formed by converting graphite under high temperature and high pressure, a process known as diamond synthesis. The longer the synthesis time, the more complete the diamond crystals become, and the fewer internal crystal defects and impurities there are. Consequently, the produced micropowder has higher wear resistance and strength. Internal crystal defects and impurities are important factors affecting the strength grade of diamond micropowder.
Micropowder Production Process
Diamond micropowder is obtained by crushing single crystal diamond raw material. Currently, the crushing process in diamond micropowder production mostly uses air jet milling. Adjustment of the crushing process parameters—air velocity, pressure, and separation wheel—all affect the micropowder quality. Therefore, it's crucial to rationally adjust crushing process parameters to achieve the same crushing effect on the powder particles and minimize the number of collisions. This ensures that high-strength raw materials can produce high-strength powders. Otherwise, high-strength raw materials may not necessarily produce high-strength powders.
Micropowder Surface Treatment Process
Strong alkali and strong acid surface treatments are typically used to remove external impurities from diamond powder. To improve the powder's self-sharpening properties, surface treatments are also used to achieve a "polycrystalline" effect. Therefore, micropowder manufacturers must carefully select the right surface treatment process and avoid excessive treatment for the sake of a polished surface. Strong alkali and strong acid surface treatments can disrupt the surface crystallization of diamond particles, increasing surface defects, reducing wear resistance, and lowering the powder's quality.
Residual material micropowder: Diamond powder produced from residual material from diamond crushing can significantly reduce its strength and quality.
