The invention relates to a low-temperature
physical property measuring device of a
solid material, which is used for measuring
specific heat,
alternating current and
direct current resistivity, a heat conduction coefficient and a thermoelectric potential rate of a
solid material at low temperature. The
physical property measuring device comprises a sample carrying part and a refrigerating part, wherein the refrigerating part comprises a Dewar flask, a Dewar sleeve, a Dewar cover, a low-temperature chamber, a vacuum extracting module and an air leakage preventing module; the Dewar flask is arranged in the Dewar sleeve; the Dewar sleeve and the Dewar cover are fastened in a
flange structure; the middle of the Dewar cover is provided with a hole in which the low-temperature chamber is inserted; and the middle of the low-temperature chamber is sleeved with a blocking sleeve for fixing the low-temperature chamber. The jointing position of a sample rod and the low-temperature chamber has a
flange structure, and the air leakage preventing module and the vacuum extracting module are clamped between the sample rod and the low-temperature chamber from bottom to top and sealed by an O-shaped ring. An
aviation plug is installed on the upper part of the sample rod, and an internal lead is connected to the
aviation plug along a rod body of the sample rod. The invention has the advantages of less
liquid nitrogen consumption, no
indium wire consumption, short
thermal relaxation time, stable low-temperature environment, relatively simple structure, low cost, and the like and can be applied to the
physical property measurement of various
solid materials in the teaching and researching process.