Method for stabilization of pan-based carbon fibers

Details Method for stabilization of pan-based carbon fibers Method for stabilization of pan-based carbon fibers

1989-06-30

1992-05-05

Lovering, Richard D.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

4234471, 4234472, 4234474, D01F 912

Patent

active

H00010529

ABSTRACT:
Polyacrylonitrile (PAN) based fibers are stabilized by heating them in an atmosphere containing oxygen and ammonia from room temperature to 150.degree.-350.degree. C., prior to carbonization and high-temperature treatment or graphitization to form carbon fibers. PAN fibers stabilized in presence of oxygen and ammonia have a higher density, and the time required for stabilization is shortened compared to being stabilized with air in the absence of ammonia, stabilization in absence of oxygen and ammonia, and stabilization in pure ammonia.

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