THERMOELEMENT Russian patent published in 2023 - IPC H10N10/817 

FIELD: electrical engineering.

SUBSTANCE: direct conversion of thermal energy into electrical energy using a high-temperature thermoelement. The thermoelement contains branches of p- and n-type conductivity made of semiconductor silicon-germanium alloy (22.5 at.% Ge) equipped with current output buses along the heat-conducting cold side and with a switching plate on the heat-receiving hot side of the branches, separated from the semiconductor material of the branches, as well as the current output busbars, by anti-diffusion graphite plates permanently connected from the outer sides to the current output busbars on the cold side of the thermoelement and the switching plate on the hot side. On the internal surfaces of anti-diffusion graphite plates, facing the silicon-germanium semiconductor alloy of the p- and n-type conductivity thermoelement branches, a layer of molybdenum silicide and a layer of iron silicide, 0.04-0.08 mm high each, are applied successively in height. The opposite sides of the graphite plates are fixedly connected to the switching plate on the hot side of the thermoelement and the current busbars on the cold side using cobalt-titanium solder (CoTi) 0.4-0.5 mm high, containing 21-23 wt.% of titanium and the balance of cobalt. The switching plate and the current busbars are made of molybdenum and covered with a layer of boron on all sides with a thickness of 0.05-0.15 mm and layers of aluminium oxide with a thickness of 0.3-0.35 mm are applied on their external surfaces.

EFFECT: increased service life and efficiency.

1 cl, 1 tbl, 1 dwg