Thermoelectric conversion module and production method therefor

摘要

A production method for a thermoelectric conversion module having a thermoelectric conversion element and an electrode, which are metallurgically bonded together via a porous metal layer. The porous metal layer is made of nickel or silver and has a density ratio of 50 to 90%.

主权项

1. A production method for a thermoelectric conversion module having a thermoelectric conversion element with an end surface and having an electrode, the production method comprising:
preparing a paste in which nickel powder particles are dispersed, the nickel powder particles having an average particle diameter of 0.1 to 10 μm; applying the paste to the end surface of the thermoelectric conversion element; abutting the end surface, to which the paste is applied, to the electrode so as to connect the thermoelectric conversion element and the electrode; heating the paste between the thermoelectric conversion element and the electrode in an inert gas atmosphere, a reducing gas atmosphere, or a vacuum atmosphere, so as to remove the paste except for the nickel powder particles and cause the nickel powder particles to remain; sintering the remaining nickel powder particles so as to form a porous nickel layer; and diffusion bonding the porous nickel layer to the end surface of the thermoelectric conversion element and to the electrode so as to metallurgically bond them, wherein the sintering and the diffusion bonding are simultaneously performed at a temperature of 650 to 850° C.