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Diamond powder is classified by particle size into nanodiamond, sub-micron diamond, and diamond micropowder. It is also categorized by morphology into spherical diamond, flake diamond, and irregularly shaped diamond. Based on crystal structure, it is divided into single crystal diamond and polycrystalline diamond.

Diamond has many applications; this article primarily introduces its use in precision grinding and polishing materials.

Nanodiamond is a nanoscale diamond structural material composed of carbon atoms, possessing many unique physical and chemical properties. It exhibits extremely high hardness and excellent grinding performance. As one of the hardest materials in the world, with a Mohs hardness of approximately 10, it far surpasses most other materials. This means nanodiamond has outstanding wear and corrosion resistance, maintaining its structural stability under extreme conditions. It also has an extremely low coefficient of friction and high grinding capability, making it suitable for efficient polishing and grinding applications. Nanodiamond particles can scrape target surfaces with very sharp edge angles, rapidly removing micro-defects, contaminants, and unevenness from material surfaces.

The particle size of diamond is controllable, typically ranging from a few nanometers to several tens of micrometers, and can be precisely regulated through synthesis methods. This controllability allows diamond powder to provide customized performance and effects for different applications.

Single crystal diamond powder uses high-quality diamond as raw material and undergoes special crushing and shaping processes, resulting in regular crystal forms and smooth particle surfaces with no obvious edges. It is suitable for metal-bonded tools, ceramic-bonded tools, various electroplated tools, composite sheets, polishing compounds, grinding fluids, and other diamond products. It addresses the issue of scratches commonly encountered in grinding and polishing applications.

Spherical polycrystalline nanodiamond refers to detonation-synthesized polycrystalline nanodiamond. The minimum particle size of individual particles is 5-10 nm, and larger spherical diamond powders can be provided according to requirements.

Flake polycrystalline nanodiamond is a new type of nanodiamond. Unlike detonation-synthesized polycrystalline nanodiamond, it is a nanodiamond product with a flake-like polycrystalline structure. This product features regular morphology, strong wear resistance, and high self-sharpening. It can be widely used in polishing and other fields, offering innovative technical solutions for the polishing industry.

The types of diamond powder mentioned above are particularly suitable for precision polishing of optical products, silicon wafers, etc. They can also be used in precision grinding wheels for polishing sapphire, jade, etc., as well as for precision grinding and polishing of various materials such as mechanical components, ceramics, gemstones, and semiconductors. Furthermore, they can be used in the preparation of metal-bonded diamond tools, electroplated diamond products, and various other diamond tools, providing optimal solutions for precision grinding and polishing across multiple fields.

The following are several important application aspects of nanodiamond in polishing:

• High-Efficiency Polishing Material: Nanodiamond possesses extremely high hardness and excellent grinding performance. It provides sharper, more uniform grinding edges, enabling rapid and effective removal of micro-defects, imperfections, and improved surface finish. During polishing, nanodiamond particles can both act as abrasives to scrape the surface and further refine it, making the polishing process more efficient.

• Optimized Surface Quality: Nanodiamond can significantly improve the surface quality of materials during polishing. It removes surface irregularities, oxide layers, and other contaminants, making the surface smoother and more uniform. Nanodiamond can also fill micro-defects, enhancing surface flatness and optical transparency. Polishing with nanodiamond yields surfaces with ultra-low roughness and high optical quality.

• High Precision and Fine Machining: Due to their small and controllable particle size, nanodiamond particles enable high-precision and fine machining results. In micro/nano machining, nanodiamond can be used to manufacture high-precision optical components, chips, micro-mechanical devices, etc. Its unique cutting characteristics and high controllability make nanodiamond an essential tool for micro- and nano-scale machining.

• Improved Material Properties: Using nanodiamond in polishing can also enhance the functionality and performance of materials. For optical materials, nanodiamond polishing can significantly increase transmittance and reflectivity, improving the optical performance of components. For metal materials, it can reduce surface roughness and the coefficient of friction, enhancing mechanical strength and wear resistance. The application of nanodiamond imparts better optical, mechanical, and chemical properties to material surfaces, further expanding their application range.

• Low Loss and High Efficiency: Owing to its high hardness and excellent grinding performance, material loss during polishing with nanodiamond is relatively low. Compared to traditional abrasives, nanodiamond removes material more effectively, reducing energy consumption and material waste. This is significant for cost savings, improving process efficiency, and environmental protection.

• Versatile Applications: The polishing applications of nanodiamond are not limited to a single material but can be used for surface treatment of various different materials. It can be applied to polish metals, ceramics, glass, plastics, and more, providing uniform and high-quality surface treatment results. This versatility makes nanodiamond an important tool in the polishing field.

In summary, the application of nanodiamond in the polishing field holds broad potential and significant importance. Its high hardness, high grinding performance, and ability to improve surface quality make it an ideal material for achieving efficient, precise, and high-quality polishing. Contact us for further information of diamond powder at any time!