| 摘要 |
<p>A composite material, including: an elastomer; carbon nanofibers having an average diameter of 0.7 to 15 nm and an average length of 0.5 to 100 micrometers; and carbon black having an average particle diameter of 10 to 100 nm and a DBP absorption of 100 ml/100g or more, the carbon nanofibers and the carbon black being dispersed in the elastomer. The elastomer includes an unsaturated bond or a group exhibiting affinity to the carbon nanofibers. The composite material includes the carbon nanofibers in an amount of 1 to 30 vol% and the carbon black in an amount of 10 to 40 vol%. The composite material has an average coefficient of linear expansion of 100 ppm (1/K) or less and a differential coefficient of linear expansion of 120 ppm (1/K) or less at -80 to 300°C.</p> |
