A simple, automatic, high-temperature thermal analysis apparatus

Abstract

A simple, automatic, high-temperature, high-vacuum thermal analysis apparatus is described. The sample, in a chamber which may be evacuated to better than 10-5 mm of mercury at 1000° C, is heated by a molybdenum element and the thermal arrests are indicated by the differential method. By placing the sample in direct contact with the thermo-couple hot-junction, solid state phase changes may be detected in samples as small as 0 3 g. Alternatively, samples of 20-80 g may be contained in crucibles and, using the arrangement, thermal arrests have been detected at temperatures up to 1550° C.