MATERIAL HOLDER

摘要

A material holder for a differential scanning calorimeter includes a heater element and a sensor element, both selected to exhibit substantially the same predetermined thermal coefficient of expansion. A cylindrical member for housing the heater and sensor elements is also selected to exhibit substantially the same thermal coefficient of expansion as well as to provide structural rigidity. The cylindrical member is formed from one of the precious metals or an alloy thereof. The heater and the sensor elements are positioned within the cylindrical member by components that electrically isolate the heater element from the sensor element but thermally couple the two together, as well as by components that electrically insulate the heater and the sensor elements from each other and from the cylindrical member but thermally couple the two elements together. The positioning components are also selected to exhibit substantially the same thermal coefficient of expansion as the predetermined coefficient. Thus a plurality of components and elements are assembled in a housing so as to expand and contract substantially coextensively without rupturing. The differential scanning calorimeter may therefore be operated reliably at high temperatures.