INSTALLATION FOR DETERMINATION OF THERMAL CONDUCTIVITY OF MATERIALS UNDER PRESSURE Russian patent published in 2022 - IPC G01N25/18 G01N25/32 G01N3/18 

FIELD: thermophysical research.

SUBSTANCE: invention relates to the field of thermophysical research and can be used to determine thermophysical characteristics, namely: the thermal conductivity of deformable materials (in particular, contact resistances in a multilayer metal package were studied depending on pressure) under high pressure. The installation includes a housing with a heater and a cooler located inside it, which are mounted on the free ends of the upper and lower pistons. The pistons have the same diameter, between which the test sample of the material is located in a special ceramic container. On the side surfaces of the upper and lower pistons, special blind holes (recesses) with a depth of 1-2 mm are made, in which temperature values ​​are monitored using a contact surface control thermocouple. On the upper piston there is a heater in the form of a nichrome wire, on which heat-conducting dielectric rings are dressed. On the free part of the lower piston there is a refrigerator, which is a closed chamber, and the piston has through drillings - hydraulic channels to improve its cooling. Coolant flows continuously through the refrigerator chamber. In the assembled (working) form, the structure has an inner metal screen and an outer insulating casing made of asbestos cement to eliminate radial heat losses and achieve a steady state of the heat flow flowing through the material under study. The assembled installation is based between the traverses of the compressing press to ensure compression of the pistons of the installation in their axial direction and maintain the necessary pressure on the material under study.

EFFECT: increasing the reliability of the results of measurements of the effective thermal conductivity of powder thermal insulation.

4 cl, 3 dwg