Difference between spherical aluminum powder and flake aluminum powder
Difference between spherical aluminum powder and flake aluminum powder
Product process introduction: Flaky aluminum powder is mainly ground by ball mill for a long time. In the production process, aluminum particles are ground for 48-72 hours under nitrogen protection, and finally flaky aluminum powder is produced. Features are as follows:
1, showing irregular flake.
2. The aluminum content is 99.5%
Product process introduction: spherical aluminum powder is mainly atomized: molten aluminum is atomized into fine particles by high-speed airflow or liquid. According to the different media used, atomization methods can be divided into air atomization, nitrogen atomization and water atomization. Nitrogen atomization is widely used because of its safety and high purity.
Main uses of flake aluminum powder: Dacromet coating, high-grade automobile topcoat, coating, ink, printing and other industries.
Flake aluminum powder has high diameter-thickness ratio, two-dimensional plane structure, good shielding effect and special angle-following effect, which makes it widely used in dacromet coatings, top-grade automotive topcoats, coatings, inks, printing and other industries. Flaky aluminum powder is a metallic pigment with a two-dimensional plane structure, with a scale-like shape, a diameter of about 3-70μm, and a diameter-thickness ratio (the ratio of diameter to thickness) of about 60-150. It has excellent metallic luster, special' color change with angle' effect, good floating performance, covering performance and shielding effect.
The main uses of spherical aluminum powder: it can be used to prepare metal paint, protect and decorate metal surface, and enhance the weather resistance and corrosion resistance of paint; Among building materials, spherical aluminum powder can also be used to prepare lightweight thermal insulation materials and metal fire-proof boards. In addition, spherical aluminum powder is also widely used in plastics, rubber and other industries. It can be used as filler or additive to improve the electrical conductivity, thermal conductivity, mechanical properties and heat resistance of plastic and rubber products. In addition, spherical aluminum powder can also be used to prepare combustion agent, aluminum powder slurry and other products. It is widely used in rocket fuel, pyrotechnics and gunpowder.
Photo of flake powder under electron microscope：
Spherical powder photograph under electron microscope：
Actual image of flake powder：
Actual image of spherical powder：
