Specialized Air Jet Mill for Aluminum Nitride: Deagglomeration and Dispersion at Nanoscale

Can aluminum nitride be pulverized using an air jet mill? Can it be ground to 8000 mesh? Sichuan Zhongjin Powder Equipment provides experimental data to answer these questions. We have a dedicated laboratory workshop equipped with air jet mills that can meet various working conditions for aluminum nitride grinding experiments. The laboratory is also equipped with a particle size analyzer to test whether aluminum nitride can be ground to 8000 mesh using an air jet mill.

Introduction to Production-Type Air Jet Mills:

Air jet mills are one of the most commonly used ultrafine grinding equipment. They are widely applied in industries such as pharmaceuticals, chemicals, battery materials, food and health products, non-metallic minerals, and ceramics for ultra-pure and ultra-fine grinding! They offer the following advantages:

Performance Advantages of Production-Type Air Jet Mills:

Compared to other ultrafine grinding machines, air jet mills have the following benefits:

① Grinding relies solely on the energy of airflow adjustment, with no dedicated moving parts required in the unit;

② Gas adiabatic expansion accelerates and is accompanied by cooling. Although high-speed particle collisions may generate heat, adiabatic expansion lowers the temperature, ensuring the material remains at a low temperature throughout the grinding process. This is particularly suitable for grinding heat-sensitive or low-melting-point materials.

③ Grinding primarily occurs through particle collisions, almost without contaminating the material. The resulting particles have smooth surfaces, high purity, and excellent dispersibility.

Working Principle of Production-Type Air Jet Mills:

The advantage of air jet mills is that the ground material remains uncontaminated. After crushing, the compressed supersonic airflow decelerates, and its volume increases, which is an endothermic process that cools the material. This makes it especially suitable for ultrafine grinding. Air jet mills use supersonic airflow to accelerate particles, causing them to collide with each other or with a target to achieve the grinding effect.

Application Directions of Production-Type Air Jet Mills:

The selection of an air jet mill depends on the type and hardness of the material. Different materials have different requirements for air jet mills. For example, brittle materials impose high demands on air jet mills. The type and hardness of the material are the primary factors to consider when selecting an air jet mill. Different types of materials have varying hardness and structures, which significantly restricts the choice of grinding equipment. Secondly, the feed particle size and desired output particle size determine the type of grinding equipment and the degree of crushing required. Particle size also imposes different requirements on the grinder. Some air jet mills handle larger particles with higher grinding demands, while smaller particles require relatively higher pressure. Different particle requirements call for different types of air jet mills.