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AssigneeToray Industries, Inc.
InventorsHidekazu Nishino, Hajime Kato, Naoyo Okamoto, Shuko Ikeuchi, Kenichi Sato, Shiho Tanaka, Kazuyoshi Higuchi
Estimating the term…
Disclosed is a composition containing carbon nanotubes which meets all of the following conditions (1) to (4). (1) When observed via transmission electron microscopy, at least 50 out of every 100 carbon nanotubes are double-walled carbon nanotubes. (2) The carbon nanotubes have an average outer diameter in the range of 1.0 to 3.0 nm. (3) During thermogravimetric analysis under atmosphere at a temperature increase rate of 10° C./minute, a high temperature combustion peak is at 700 to 850° C., and the relationship between low temperature weight loss (TG(L)) and high temperature weight loss (TG(H)) is TG(H)/(TG(L)+TG(H))≧0.75. (4) The composition containing carbon nanotubes has a volume resistance value between 1.0×10−2 Ω·cm and 1.0×10−4 Ω·cm, inclusive. The disclosed composition containing carbon nanotubes primarily has double-walled carbon nanotubes with high electrical conductivity and high heat resistance.
A composition containing carbon nanotubes which meets all of the following conditions (1) to (4);
A catalyst body for producing carbon nanotubes comprising a fine particle comprising a Group 8 to Group 10 transition metal and magnesium oxide flakes, wherein the fine particle comprising a transition metal has an average particle diameter of 1 nm to 30 nm, and a content of the transition metal is 0.1 to 1 wt % relative to the catalyst body.
An aqueous dispersion of carbon nanotubes, comprising carbon nanotubes having an average outer diameter of 3 nm or less and a dispersant, wherein an average particle diameter of the carbon nanotubes as measured by a dynamic light scattering method is 200 nm or more and 1500 nm or less.
Dependencies are inferred from the claim text.