Thermal diffusivities, K, of several types of industrial refractories measured in vacuum by monotonous heating mehtod with the rate of about 1.5 centre dot 10~3 K/h, exhibit an abnormal behavior. In particular, k of magnesite refractories, with porosity #epsilon#=24percent measured in vacuum, exceeds the comparable data registered at atmospheric pressure. A similar effect was found for thermal diffusivity of several insulating materials. However, for many materials this phenomenon is absent or less pronounced.
展开▼
机译：几种工业耐火材料的热扩散率K在真空中通过单点加热方法以约1.5个中心点10〜3 K / h的速率测量，表现出异常行为。尤其是，在真空中测得的孔隙度为＃epsilon＃= 24％的k菱镁矿耐火材料超过了在大气压下记录的可比数据。对于几种绝缘材料的热扩散率也发现了类似的效果。但是，对于许多材料来说，这种现象是不存在的或不那么明显的。
展开▼
