公开(公告)号：JPH1143316A

公开(公告)日：1999-02-16

申请号：JP21416497

申请日：1997-07-23

Applicant: AGENCY IND SCIENCE TECHN

Inventor： KATO RYUJI ,  TASAKA TEIJI ,  KAKUDATE YOUZOU ,  YUMURA MORIO ,  IGASAKI FUMIKAZU ,  FUJIWARA SHUZO

IPC: C01B31/02 ,  B01J19/10 ,  B01J23/06 ,  B01J23/755 ,  D01F9/127

Abstract: PROBLEM TO BE SOLVED: To inexpensively and safely produce a product by irradiating ultrasonic wave to a liquid organic compound with an added solid catalyst for promoting carbonization of the organic compound. SOLUTION: A raw material liquid is prepared by adding 0.1-30 pts.wt. solid catalyst for promoting carbonization, such as a transition metal or a transition metal compound to 100 pts.wt. liquid organic compound. An ultrasonic wave having 10-1,000 kHz frequency is irradiated to the raw material liquid in a condition of 10-2,000 W/hr input energy for 1-30 min while bubbling an inert gas such as Ar and keeping the liquid temperature at (-20)-100 deg.C to provide the objective carbon natotube. The solid catalyst for promoting carbonization has 0.1-1,000 μm average particle diameter, and is selected from transition metals such as Al, Ti, V, Cr, Mn and Fe, and transition metal compounds such as ZnCl2 , AlCl3 , NiCl2 and SnCl4 .The liquid organic compound has a ratio H/C of hydrogen atom to carbon atom included in a molecule and regulated so as to be 0.5-2.5, and includes a benzene-based hydrocarbon, a naphthalene-based compound, coal tar, etc.

公开(公告)号：JPH09188600A

公开(公告)日：1997-07-22

申请号：JP99496

申请日：1996-01-08

Applicant: AGENCY IND SCIENCE TECHN

Inventor： TASAKA TEIJI ,  YODA SATOSHI ,  OSHIMA SATORU ,  YUMURA MORIO ,  UCHIDA KUNIO ,  KURIKI YASUNORI ,  IGASAKI FUMIKAZU

IPC: C30B29/62 ,  B82B1/00 ,  C01B31/02

Abstract: PROBLEM TO BE SOLVED: To provide a carbon whisker having a diameter of μm order and easily handleable as an industrial product and provide its production process. SOLUTION: The carbon whisker has a diameter of 0.1-10μm. The whisker can be produced by generating arc discharge in an inert gas between an anode composed of graphite and a hydrogen-occluding metal and an arbitrary heat- resistant cathode to form a carbon deposit containing carbon whiskers on the cathode.