Abstract
The heat conductivity has been measured on commercial new refractories containing large quantities of amorphous carbon and crystalline graphite. The hot wire technique was used with a thin wire of molybdenum. The thin surface layer of the sample was decarburized by oxidation in order to produce an electrically insulating layer.
The heat conductivities have shown large temperature dependency and decreased with increase of temperature. The heat conductivity seemed very much affected by large contents of amorphous carbon and crystalline graphite.
