Explanation

ultrafine powder can be divided into two categories: crushing method and synthesis method. The pulverization method is to atomize a large volume of melt or fine particles (jet mill pulverization). The synthesis method is to form particles through the nucleation and growth process of atoms or molecules. The evaporation gasification condensation method is the main method to prepare high-purity ultrafine powder, but its productivity is low and cost is high. When powder is used to form parts, powder reaches the ultra-fine degree, which often makes the parts have excellent characteristics. For example, to manufacture ceramics tools with high temperature resistance and high strength (such as tools and turbine blades), ultrafine powder needs to be used for sintering after molding. A form of powdered commercial dye or dyestuffc. Its particles are very small and uniform. It is also called suspension pad dyeing fine powder. It refers to the variety of vat dye or dyestuffc that can be directly used in the suspension pad dyeing process. Ultrafine powders are usually divided into micron, submicron, and nanoscale powders. The international scientific and technological community usually considers particle sizes greater than 1 μ The ultrafine powder of m is called micron level powder; Particle size between 0.1-1 μ The powder of m (i.e. 100nm to 1000nm) is called sub micron level powder; Particle size between 0.001 and 0.1 μ The powder of m (1nm-100nm) is called nanometer powder (also called nanomaterials). In a broad sense, nanomaterials means that at least one dimension of the three-dimensional dimension is in nanometer size.

Classification