Method and apparatus for the rapid determination of the thermal diffusivity of refractory materials over a wide temperature range

Summary Using the proposed method, it is possible to determine the coefficient of thermal diffusivity and conductivity over a wide temperature range.In estimating the errors, it is necessary take into account the fact that owing to differences in structure and to inconstancy of composition, it is practically impossible to prepare two absolutely identical specimens. In a large number of experiments, however, it is always possible to obtain a sufficiently reliable result.In the furnace of the construction we have proposed, specimens may be heated to a temperature of the order of 1600C. If the experimental conditions require heating the specimen to a temperature not exceeding 1000C, an ordinary laboratory tubular electric furnace may be used.