抄録
A fast multi-property measurement method using an electrical-optical hybrid pulse-heating technique has been developed for simultaneously measuring specific heat capacity, thermal diffusivity, thermal conductivity, hemispherical total emissivity, normal spectral emissivity, electrical resistivity, and Lorentz ratio of electrically conductive materials at high temperatures with better accuracy and efficiency. This technique is a combination of the electrical pulse heating method and the flash method. A thin strip specimen is directly heated by the passage of current through the specimen and the temperature of the specimen is maintained constant at a preset high temperature for several hundred milliseconds by fast feedback control of the heating current. The front face of the specimen under the brief steady state realized by the feedback control is heated by a light pulse of several hundred microseconds duration and the transient temperature response is observed at the rear face of the specimen. Time-resolved temperature measurements of the sample are carried out using a high-speed pyrometer and photopolarimeter. The details of the method and apparatus are described. Preliminary results measured by this method are presented. The primary advantage of this method is the resultant short exposure of the sample to high temperature, which can minimize the contamination of the sample and apparatus and the measurement cost and time. A further advantage of this technique is its ability of multidisciplinary investigation of both characteristics of bulk and surface of a material by using a specimen and an apparatus.
https://ror.org/01703db54 
