Diamond micropowder, a high-performance industrial material, plays a pivotal role in many fields due to its superhard, wear-resistant, corrosion-resistant mechanical properties and special properties in light, electricity, heat, etc. This article will explore in depth the production process of diamond micropowder and its new applications in the industry.
Production process
The production of diamond micropowder is a complex process involving machinery, powder engineering, physical chemistry, modern instruments and testing technology. Its raw material is mainly single crystal diamond. Through crushing, grading and other process steps, the coarse particles of single crystal diamond are converted into micron or submicron level micropowder. At present, the most commonly used crushing methods are ball milling and air flow crushing.
The ball milling method mainly uses a drum ball mill to crush diamonds by mechanical crushing and low-speed impact. However, this method has low production efficiency and is gradually replaced by the air flow crushing method. The air flow crushing method uses compressed air as the working medium, and sprays compressed air into the crushing chamber at high speed through a supersonic nozzle, so that the diamond particles collide, rub and shear with each other during high-speed movement, thereby achieving the purpose of crushing. This method can not only produce ideal particle shapes, but also improve production efficiency.
Classification of crushed diamond particles
The crushed diamond particles need to be classified by particle size to ensure the uniformity and consistency of the micropowder. At present, the particle size classification method widely used in my country is a process combining natural sedimentation and centrifugation. The natural sedimentation method uses Stokes' law to classify the particle size by controlling the sedimentation height and sedimentation time; while the centrifugation method uses a high-speed rotating disc to accelerate the sedimentation speed of the particles, improve the measurement accuracy, and make the detection of ultrafine particles possible.
Applications of diamond powder
Diamond powder has shown a wide range of application prospects in many industries due to its unique properties. In the field of mechanical processing, diamond powder is an ideal material for operations such as cutting, grinding, drilling and polishing, and is particularly suitable for processing high-hardness materials such as cemented carbide, ceramics, gemstones and optical glass. It is also a key raw material for manufacturing diamond tools such as grinding wheels, drill bits and saw blades.
In the field of electronics and semiconductors, diamond powder is widely used in the manufacture of semiconductor devices and circuit boards due to its high thermal conductivity and electrical conductivity. Especially in semiconductor packaging substrates, diamond powder is compounded with metal matrix, showing great potential in the field of electronic packaging. In addition, diamond powder is also used for cutting photovoltaic silicon wafers. It has fast cutting speed, high efficiency, low cost, and low environmental pollution. It is the core technical link of "reducing costs and increasing efficiency" for photovoltaic companies.
The application of diamond powder in the aerospace field is also eye-catching. As a coating material, it can improve the wear resistance, corrosion resistance and thermal conductivity of parts. In the development of composite materials, diamond powder can significantly improve the strength and durability of materials, providing key material support for the manufacture of aerospace vehicles.
With the continuous advancement of technology, the application field of diamond powder is still expanding. In the field of biomedicine, diamond powder can be used as a drug carrier to improve the targeting and efficacy of drugs. In the field of environmental protection, diamond powder can be used in wastewater treatment and air purification, showing its great potential in the field of environmental protection.
In addition, diamond micropowder also plays an important role in geological exploration and oil drilling. Diamond drill bits are inlaid with diamond micropowder, which can drill quickly in hard rock formations, improving drilling speed and exploration efficiency. At the same time, the wear resistance and stability of diamond micropowder also ensure the service life of the drill bit.
Conclusion
In summary, diamond micropowder, as a high-performance industrial material, has broad application prospects and huge development potential. With the continuous innovation and progress of technology, the production process of diamond micropowder will be more efficient and environmentally friendly, and its application field will continue to expand and deepen. We have reason to believe that in the future development, diamond micropowder will play an important role in more fields and make greater contributions to the development of human society.
