Heat flow flux type differential scanning calorimeter
View Patent ↗There is provided a differential scanning calorimeter in which a base line stability and a responsiveness are improved. There is made a constitution in which the stability is ensured by making a neck-like part in a heat passage from a heat reservoir 1 to a sensor plate 4 and, at the same time, a two-dimension heat flow passage to a sample holder 5 a is ensured.
1. A heat flow flux type differential scanning calorimeter comprising:
a heat reservoir configured to supply heat;
a thermally conductive joint having opposite two ends, one end thereof constituting a heat inflow portion being in contact with the heat reservoir such that the joint receives heat from the heat reservoir via the heat inflow portion, and the other end thereof constituting a heat outflow portion being isolated from the heat reservoir and having two arcuate cutouts formed therein;
a sensor plate being in contact with the heat outflow portion of the thermal joint except two peripheral portions surrounded by the two arcuate cutouts of the heat outflow portion, such that the two peripheral portions receive heat from the heat outflow portion through multiple heat flow paths in multiple directions extending from the arcuate cutouts of the heat outflow portion; and
a sample holder and a reference material holder formed in the peripheral portions.
2. A heat flow flux type differential scanning calorimeter according to claim 1 , wherein the heat reservoir is made of silver.
3. A heat flow flux type differential scanning calorimeter according to claim 1 , wherein the two arcuate cutouts are identical to each other.
4. A heat flow flux type differential scanning calorimeter according to claim 1 , wherein the sensor plate is substantially oval in its shape.
5. A heat flow flux type differential scanning calorimeter according to claim 1 , wherein the sample holder and the reference material holder are formed as platforms.
6. A heat flow flux type differential scanning calorimeter according to claim 1 , wherein the sample holder and the reference material holder each comprise a disk made of a material selected from the group consisting of gold, platinum and silver.
7. A heat flow flux type differential scanning calorimeteraccording to claim 1 , wherein the arcuate contours of the heat outflow portiondefined by each delineate a part of a circle along a contact with the sensor plate withinthe range between ¼ and ½ of the circle.
8. A heat flow flux type differential scanning calorimeteraccording to claim 1 , wherein the sensor plate is made of a metal having a thermal conductivity lower than silver.
9. A heat flow flux type differential scanning calorimeter according to claim 8 , wherein the sensor plate is made of constantan.
10. A heat flow flux type differential scanning calorimeter according to claim 1 , wherein the heat outflow portion of the thermal joint comprises an upper part and a lower part between which the sensor plate is held.
11. A heat flow flux type differential scanning calorimeter according to claim 6 , wherein the upper part and the lower part have surfaces of an identical shape which hold the sensor plate therebetween.
12. A heat flow flux type differential scanning calorimeter according to claim 6 , wherein the upper part is made of silver.