... in constriction area instead of asbestos products. Mica powder chemical composition and physical property Chemical compositionSiO2Al2O3Fe2O3CaONa2OMgOTiO2K2OContent(%)45-4828 ... 06-0.657-9.8 Usage of Mica Powder Mica powder can be widely used in architecture, building materials ... , welding electrode, cosmetics, aerospace and other fields. Mica powder specifications: 20 meshes, 4o meshes, 60 meshes, 100 ...