Polyacrylonitrile base plumbago felt is formed by subjecting the high quality polyacrylonitrile base carbon felt to pyrographite treatment. It is light in quality, good in flexibility, high in carbon content, high temperature resistant, without volatilization under high temperature, corrosion resistant and small in heat conductivity coefficient and high in shape retention. It is fine heat insulator for polysilicon and monocrystalline silicon preparation furnace, also the corrosion resisting filter material.
Polyacrylonitrile base (PAN) carbon felt is light in quality, small in specific heat capacity, soft in texture, good in adiathermancy and convenient in operation, which can save great energy. Therefore, thermal insulation of the polyacrylonitrile base is extremely superior in vacuum or inert atmosphere, in particular, performance of the polyacrylonitrile base is stable under high temperature condition, and it is the excellent thermal insulation material for Vacuum Furnace.
