Vibratory Mill for Silicon Carbide

Because of its high hardness, SiC is a difficult-to-grind material with long grinding times and a high risk of contamination. This article explains the benefits of implementing vibratory mills that reduce processing time through powerful impact force and maintain purity through material selection, as well as how to use them according to the process.

Why Vibratory Mills
Are Chosen for
Fine Grinding SiC

Shorter Fine Grinding Time
Than Ball Mills

Vibratory mills cause the entire grinding cylinder to vibrate at high speed, simultaneously applying strong impact, friction, and shear forces through the media. Because of this mechanism, they can achieve fine grinding in about one-tenth to one-twentieth of the time required by a rotary ball mill.

They can reduce particle size to the submicron range (1 μm or less) in a short time through vibrational energy. Another feature is that motor power is converted directly into high-G vibration, allowing cracks to form efficiently in hard particles. Processes that once took several days can now be completed in a few hours, helping eliminate bottlenecks in production lines.

Lower Energy Costs
Than Jet Mills

A disadvantage of jet mills is that much of the electricity used to generate large volumes of compressed air is lost as heat, resulting in high energy consumption. In contrast, vibratory mills offer excellent energy efficiency because they convert motor power directly into mechanical vibration.

Vibratory mills use physical impact for grinding and can reduce power consumption while achieving the same fineness. Lower running costs are a significant advantage for companies seeking to reduce manufacturing costs and improve factory energy efficiency.

Same-Material Grinding
with SiC Liners and Media
to Protect
Semiconductor Purity

In electronic materials such as power semiconductors, trace amounts of metal impurities can directly cause product defects. Vibratory mills allow flexible selection of materials for the inner lining of the grinding cylinder and the media. By using same-material grinding with the same SiC material as the product, or by adopting urethane or rubber linings, vibratory mills can suppress contamination from wear particles, eliminate the acid-washing step after grinding, and improve yield and quality stability.

Choosing Between
Wet and Dry
Vibratory Milling
Based on the Final Product

Vibratory mills support both wet and dry processes, allowing flexible process design. Wet grinding prevents re-agglomeration by dispersing particles in a liquid, making it suitable for fine grinding in the submicron range and for slurry preparation. On the other hand, dry grinding can eliminate the drying step, helping reduce equipment implementation costs and simplify the process.

Dry grinding can also deliver mechanochemical effects such as surface modification and compounding through vibrational energy, contributing to the development of high-performance materials beyond simple fine grinding. By selecting the method according to the form of the final product and the requirements of the next process, the efficiency of the entire production line can be improved.

Main Products
and Applications
Requiring SiC Grinding

Because of its high hardness and thermal conductivity, SiC is used in a wide range of applications, including wafers and heat-dissipation components for power semiconductors and LEDs, as well as abrasives. To leverage these properties, uniform and fine particle control is essential.

Precise grinding using vibratory mills is also important for fine ceramic materials used in products such as mechanical seals and for filler incorporation into resins and metals. In advanced industries where product performance continues to improve, the ability to manufacture high-quality powders influences product competitiveness.

Conclusion: Vibratory Mills Are an Efficient Approach
for Fine Grinding SiC

Vibratory mills are one of the most effective approaches for shortening fine grinding time while achieving both lower running costs and higher purity through high-G impact force. For difficult-to-grind materials such as SiC, it is recommended to compare models, including the selection of lining and media materials.