Mica

A group of aluminosilicate minerals with a sheet-like structure, which can separate into thin, transparent, optically flat films. Mica is resistant to attack by water, oil, most acids and alkali solvents. Mica has high thermal insulation, dielectric strength and heat resistance. Used in wire and cable insulation wrap to a limited degree to meet severe radiation resistance requirements and for high-temperature wire demanding good heat resistance.