SPHERICAL GLASS-STATE CARBON POWDER AND ITS PRODUCTION

Japanese Patent JP3250670

B2

PURPOSE: To provide a spherical glass-state carbon powder having a rollability excellent in handleability a high strength capable of low damage-deterioration and a fine spherical shape and to provide its production method.
CONSTITUTION: The objective spherical glass-state carbon powder having ≥1.0 true specific gravity, 0.1-100μm average particle size and ≥1.2 sphericity. Its production method is composed of the first hardening process where an initial condensate of phenol resin having ≥45wt.% actual carbon ratio is powdered to a fine spherical powder having 0.2-120μm average particle size and ≤1.2 sphericity and then immersed in an acid solution of 10-50°C for ≥30min the second hardening process where the powder is allowed to stand in the air at 150-300°C for ≥30min and the subsequent burning and carbonization process in a non-oxidative atmosphere.

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Yoshio Suzuki
Hisayuki Hamashima

JP35326291A

January 28, 2002

December 16, 1991

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Tokai Carbon Co., Ltd.

C01B31/02; C04B35/52; (IPC1-7): C01B31/02

JP63199924A
JP63195417A

Fukuda Yasuo (1 person outside)

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