Thermoelectric elements based on compounds of silicon and transition metals

Semiconducting compounds based on silicides of 3d transition metals (MnSi1.75 and CoSi) are promising thermoelectric materials for mass-produced thermoelectric generators. Their practical use has been delayed so far by the lack of reliable switching. Electrochemical surface treatment technology and metal deposition were used to obtain thermal-cycling-resistant, switching and antidiffusion metal coatings (Ni, Co, Fe, Cr) with an electrical resistivity up to 10−6 Ω·cm2 in the metal-semiconductor region. This technology was applied to develop a series of thermoelements and thermoelectric generators having wide-ranging applications.

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