Present status including some problems and improvements in the technique of thermal property measurement using the laser-flash method is presented. For thermal diffusivity measurement, the necessity and method of data correction are discussed because of the inevitable deviation from the ideal condition in many cases. As one of the most precise methods for heat-capacity measurement, the reliability and usefulness of the laser flash calorimetry, as well as its limitation, are surveyed.
Activities and recent accomplishments of several international organizations on thermophysical properties are reviewed. They include IUPAC Subcommittee on Transport Properties, IUPAC Thermodynamic Tables Project Centre, International Association for the Properties of Steam and CODATA.
The volumetric behavior (density, specific volume, compressibility), velocity of sound, viscosity, thermal conductivity and dielectric constant of various organic liquids were measured at temperatures from 273 to 373K and pressures up to 300MPa. The methods of measurements for each property and their accuracies were described briefly. Using the experimental results obtained, the effects of temperature, pressure and density on each property were summarized as the general behaviors. The anomalous behaviors in compressibility and viscosity of several aqueous solutions of alcohols were also discussed. The Taittype empirical equation was examined in order to express the effect of pressure on all the properties.
Carbon steels are widely used in the world. However, their thermophysical properties and electrial conductivity are intricately affected by many impurities. In this study, we carefully made the materials for specimens of iron-carbon binary alloys to elliminate the impurities, and measured the temperature dependence of thermal diffusivity, specific heat, thermal conductivity, and electrical conductivity by using the specimens a Further, we investigated the relations between the thermal and electrical conductivities, and absolute temperature.