Mechanical milling is a process used to break down materials into smaller particles or powders. It involves the use of mechanical forces, typically through a milling machine, which can include various tools like ball mills or jet mills. The materials are placed in a chamber where they are subjected to repeated impacts, shear forces, and friction, resulting in size reduction. This technique is widely used in industries such as pharmaceuticals, metallurgy, and ceramics to create fine powders for various applications. The process can also enhance the properties of materials, making them more suitable for specific uses, such as improving reactivity or solubility.