Patent ID: 6390669
Filing Date: 2002-05-21
Classification: G01N

Abstract:
A heat flux type differential scanning calorimeter comprising: a heating oven made of a thermal conducting material and having a bottom portion and a wall portion forming a cylindrical internal space; a heat buffer plate disposed on the bottom portion of the heating oven and formed of a material having a heat conductivity lower than that of the thermal conducting material of the heat oven; and a differential heat flow detector removably mounted on the heat buffer plate so that the differential heat flow detector is not directly contacted with the heating oven and the heating oven and the differential heat flow detector are contacted only through the heat buffer plate; wherein the differential heat flow detector comprises a heat conducting metal plate for supporting an unknown sample and a reference sample within the internal space of the heating oven, a heat conduction support member for supporting the beat conducting metal plate and formed of a material having a heat conductivity higher than that of the heat buffer plate, and a differential thermocouple having a plurality of metal wires connected to the heat conducting metal plate for measuring a heat flow in the heat conducting metal plate in accordance with a difference in heat flow absorbed or dissipated by the unknown sample and the reference sample by application of a voltage between the metal wires.