| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electroconductive composition excellent in voltage stability and environmental stability and provide its molded body. <P>SOLUTION: The electroconductive composition contains carbon nanofibers and electroconductive powders in a matrix and has the relationship of following equation (1) between the volume resistance R100 under applied voltage 100 V and the volume resistance value R1000 under applied voltage 1,000 V. Preferably, the composition contains the carbon nanofibers with a particle size of ≤0.1 μm, an aspect ratio of ≥5 and a powder resistance of ≤1.0 Ω cm and the electroconductive powders whose powder compact has a resistance value of 10<SP>0</SP>-10<SP>8</SP>Ω cm under the pressure of 100 kg/cm<SP>2</SP>, and the content of the carbon nanofibers is ≥0.1 wt.%, that of the electroconductive powders is ≥10 wt.%, and the total content of these is one to give a volume resistance of 10<SP>3</SP>-10<SP>12</SP>Ωcm under the voltage 100 V applied for the composition. The equation (1) is shown by log<SB>10</SB>R100-log<SB>10</SB>R1000≤1.0 (1). <P>COPYRIGHT: (C)2007,JPO&INPIT |
