THERMAL CONDUCTIVITY AND THERMAL EXPANSION OF BeO AT ELEVATED TEMPERATURES

摘要

Thermal expansion measurements were made from room temperature to 1100 °F on numerous samples of BeO using a dilatometer. No appreciable change was caused by varying the density from 50 to 95%, by using BeO powder from different sources, or by varying the hot-press procedures. The measured ex¬pansions indicate a percentage coefficient of linear expansion varying between 8.61 and 9.02 x 10-6/°C and agree with high temperature X-ray lattice para¬meter measurements and with previous linear expansion measurements obtained above 800 °C by other investigators.