Instrument for measuring thermal conductivity

摘要

The instrument measures the thermal conductivity of thin, porous or powdered material samples under vacuum using a vertical heat chain comprising an upper, heated reference element (1), the material sample (2) and a lower, cooled reference element (3). The pressure exerted on the material sample (2) by the weight of the upper reference element (1) is set to a predeterminable value with the aid of a variable counterweight (17) connected mechanically to the upper reference element (1). <IMAGE>