Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Nozomu Shigemitsu

Takuya Morishita

Mamiko Narita

Mitsumasa Matsushita

Makoto Mouri

Hideyasu Kawai

Yoshihiro Kikuzawa

Akira Kunitomo

Takanori Tatematsu

A carbon fiber wherein an average fiber diameter of a single fiber is in a range of 3 to 10 μm, and an average value of an intensity ratio (D/G) of a D peak to a G peak in a Raman spectrum in a cross section perpendicular to a fiber axis direction of the single fiber is 0.90 or less in a region inside a circle having a diameter of 1 μm and centered at a center of gravity of the cross section of the single fiber, and is 0.90 or less in a region up to 1 μm inside from an outer periphery of the cross section of the single fiber, wherein the D peak is observed at around 1360 cmand derived from a defect in a graphite structure and the G peak is observed at around 1590 cmand derived from the graphite structure.

Carbon fiber and method for producing the same

A method of producing a stabilized fiber, including performing a heat treatment on an acrylamide polymer fiber under an oxidizing atmosphere in a stabilization treatment temperature range of 200&#xb0; C. to 500&#xb0; C. while applying a tension of 0.07 mN/tex to 15 mN/tex.

Stabilized fiber, method of producing the same, and method of producing carbon fiber

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Nissin, Japan

Nozomu Shigemitsu