An automatic apparatus for measuring the high-temperature thermal conductivity of ceramic materials

The apparatus described in this paper is designed to make measurements of the thermal conductivity of ceramic materials at high temperatures. It is based on the radial heat-flow method. The apparatus enables measurements of the thermal conductivity of ceramic materials at any temperature over the range from 100 to 1100°C. In a single operation measurements at five selected temperatures can be made automatically. Results of measurements of the thermal conductivity on a few ceramic samples are presented.