ZIRCAR Ceramics’ Alumina Paper Type APA is a family of thin, uniform, paper-like structures made principally of polycrystalline alumina fiber (PCW). A small amount of silica-based fibers are added, which enhance APA’s ability to be manufactured on continuous paper-making equipment.
Alumina Paper Type APA is available in three varieties. All three are useful at temperatures as high as 1650°C (3002°F).
APA-1 is a relatively strong, flexible paper that contains an organic binder. This organic binder begins to decompose at 200°C and is typically completely removed at 600°C. APA-1 is available in sheet and roll forms in a variety of thicknesses.
APA-2 is a flexible sheet that has had its organic binder burned out. It is free of organics.
APA-3 is a very thin, uniformly rigidized, stiff sheet of alumina fiber and colloidal alumina binder. It is free of organics