Polyacrylonitrile-based oxidized fiber, carbon fiber structure, and method of producing a carbon fiber structure

摘要

PROBLEM TO BE SOLVED: To provide a carbon fiber structure having improved oxidation resistance, generating little fine powder and exhibiting high metal-supporting characteristics, a method for the production of the structure and an oxidized fiber for the production method. ;SOLUTION: The objective carbon fiber structure having an oxidation resistance of ≥620°C, a fine power generation of ≤18 mg/g and a metal supporting property of ≥550 ppm is produced by forming an oxidized fiber structure from a polyacrylonitrile-based oxidized fiber having an ash content of ≤0.1 wt.%, a zinc content of 100-500 ppm, a phosphorus content of 20-250 ppm, an iron content of 0.5-10 ppm and a calcium content of 5-60 ppm (in terms of weight) and carbonizing the oxidized fiber structure in an inert gas at ≥1,700°C. The specific gravity of the polyacrylonitrile-based oxidized fiber is preferably 1.33-1.45.;COPYRIGHT: (C)2001,JPO