Abstract
In measuring thermal conductivity of a glass fiber, thermal radiation may have a large influence on its accuracy. In this research, the influence was closely investigated to find proper experimental conditions for the measurement. As a result, by inserting a fiber into a radiation shield maintained at about the average temperature of the fiber, it was found that the influence could be reduced to within 5 %. By measearing the thermal conductivity of E-type glass fiber under such a condition, those of 0.2 W/(m・K) and 0.9 W/(m・K) at 20 K and 94 K, respectively were obtained.
