Patent ID: 8329135
Filing Date: 2012-12-11
Classification: B82Y,C01B,Y10T

Abstract:
1. An aligned carbon nanotube bulk structure comprising a plurality of carbon nanotubes (CNTs) having a high density portion and a low density portion, and having alignment in one direction in which the high density portion has a weight density of 0.3 to 1.5 g/cm 3 and the low density portion has a weight density of 0.001 to 0.2 g/cm 3 , wherein the high density portion has a specific surface area of 800 to 2600 m the alignment of the plurality of the carbon nanotubes comprising the high density portion and the low density portion is defined by at least one of the following conditions; 1) in a case of measuring an X-diffraction intensity by irradiating X-rays from a first direction and a second direction perpendicular to the first direction (a θ-2θ method), an angle θ and a reflection azimuth at which the reflection intensity from the second direction is higher than the reflection intensity from the first direction are present, and an angle θ and a reflection azimuth at which the reflection intensity from the first direction is higher than the reflection intensity from the second direction is present, in which the first direction is an alignment direction of the CNT or a direction perpendicular to the alignment direction of the CNT, and the second direction is a direction perpendicular to the alignment direction of the CNT or the alignment direction of the CNT, 2) a diffraction peak pattern exhibiting the presence of anisotropy appears in a case of measuring an X-ray diffraction intensity by a 2-dimensional diffraction pattern image obtained by irradiating X-rays from a direction perpendicular to the alignment direction of the CNT (a Laue method), and 3) a Herman's orientation factor is larger than 0 and smaller than 1 when using the X-ray diffraction intensity obtained according to the θ-2θ method or the Laue method.