Surface Tension and Density of Molten A1 ₂ O ₃

Abstract

An X‐radiographic technique was developed to obtain profiles of molten ceramic menisci and pendant drops sealed in molybdenum or tungsten capsules. The surface tension for Al 2 O 3 was calculated from the shape of the drops or menisci. Molybdenum capsules lowered the surface tension value. The density was 3.01 g/cm 8 at the melting point.