| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermal stress relieving pad which can be easily jointed to the jointing members of a heating duct, cooling duct, etc., can be manufactured easily, and has high soundness. SOLUTION: A stress-relieving pad 3 or 4 is formed to contain a functionally gradient material 5 or 6 obtained by gradually changing the compositional ratio between a thermal stress relieving/heat conducting body, made of a material having a large coefficient of thermal conductivity and a small elastic constant and an electrical insulator, without jointing the materials to each other. The material 5 or 6 contains an electrical insulating layer 5a or 6a and, at the same time, the amount of the electrical insulator in the compositional ratio is reduced toward both a heat source-side contact surface 5b or 6b and a thermoelectric element-side contact surface 5b or 6b from the electrical insulating layer 5a or 6a in the thickness direction of the material 5 or 6. On the other hand, the amount of a thermal stress relieving/heat conducting body in the compositional ratio is increased, so that the body occupies most of the ratio at the contact surface 5b or 6b. Then a thermoelectric conversion element 1 is constituted by respectively interposing the pads 3 and 4 between a thermoelectric element 2 and heat sources 9 and 10. |
