TOWARD STANDARD REFERENCE VALUES FOR THE THERMAL-CONDUCTIVITY OF HIGH-TEMPERATURE MELTS

The paper describes the progress made in the development of an instrum ent for the measurement of the thermal conductivity of molten material s at high temperatures. The instrument is designed to provide experime ntal data of unique accuracy at temperatures up to 1500 K on a wide ra nge of materials, some of which will be suitable as standard reference substances. In particular, the paper concentrates upon the method of analysis of the experimental data and upon those critical aspects of t he experimental technique which will enable a high accuracy to be achi eved. Demonstrations of the validity of the method of treating one cor rection and of its behavior under typical conditions are included.