Diamond micro-powder, due to its unparalleled hardness and fine particle size, is widely used in various fields. This article will delve into the application range and production process of diamond micro-powder, providing you with comprehensive knowledge.
Diamond micro-powder is widely used in mechanical, aerospace, optical instruments, glass, ceramics, electronics, petroleum, geology, and military industries. It is an ideal material for grinding and polishing hard materials such as hard alloys, ceramics, gems, and optical glass.
Polycrystalline diamond micro-powder utilizes good toughness, maintaining high grinding force during the grinding and polishing process without easily causing scratches. It is widely used for grinding and polishing various hard materials such as optical crystals, ceramics, and super-hard alloys. Generally, 0~0.5 microns diamond micro-powder to 6~12 microns diamond micro-powder is used for polishing; 10~15 microns to 22~36 microns for grinding; 12~22 microns and coarser for fine grinding.
Production Process Overview
Diamond micro-powder production involves multiple steps. From raw material processing to final product inspection, each step is crucial. The production process generally includes the following steps: diamond raw material crushing and shaping, acid treatment, washing, ultrasonic dispersion processing, particle size classification, single particle size acid treatment, drying, particle size inspection, and finally weighing and packaging for storage. The production of diamond micro-powder usually employs low-tech materials, but for special applications, such as diamond wire saws and glass drills for electroplated products, higher-grade materials may be required.
Crushing and Shaping Technology
Crushing and shaping are key steps in diamond micro-powder production. Traditionally, ball milling was the primary crushing method, achieved through low-speed mechanical impact. However, jet milling technology has now become the primary crushing method. The working principle of jet milling is to inject compressed air into the grinding chamber at high speed through nozzles. The diamond raw material undergoes repeated collisions, friction, and shearing at the intersection of multiple high-pressure gas streams to achieve crushing. This method efficiently crushes diamond raw material into micron-sized particles, ensuring particle uniformity and shaping effect.
Diamond micro-powder production is not just a process of particle refinement but also involves changes in crystal structure and surface physicochemical properties. As diamond micro-powder particle fineness continues to increase, its specific surface area and specific surface functional groups also significantly increase, greatly enhancing the interactions between particles. This makes the production process of diamond micro-powder very complex, requiring the integrated application of knowledge from multiple disciplines, including mechanical engineering, powder engineering, mechanics, physical chemistry, and modern instrumental measurement technologies.
Although China has made significant progress in diamond micro-powder manufacturing, achieving the highest cost-performance ratio globally, improving production processes and solving new problems remain key tasks for the industry's future development.
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