| dc.description.abstract | In recent years, the world has been looking for alternative energy sources and green power generation. The emergence of thermoelectric materials provides hope for pollution-free, high-efficiency power generation and cooling chips. Therefore, thermoelectric power generation has attracted a lot of attention. A thermoelectric material is a material that can convert electrical energy and thermal energy interactively. This material can generate electromotive force under a sufficient temperature difference to achieve the phenomenon of generating electricity by heat. Conversely, it can also be supplied with current to produce heat absorption or heat release effects to achieve the effects of heat generation and cooling. Judging the conversion efficiency of thermoelectric materials depends on the thermoelectric figure of merit (ZT), so how to improve the ZT figure of merit is what we should discuss.
This paper studies N-type Mg2 (Si,Sn) thermoelectric materials. The N-type nanosilicon powder is produced through the reaction of silicon-doped antimony, mixed with magnesium, tin, and bismuth powder and cold pressed into a block, annealed to form a magnesium-silicon-tin alloy, and then tested by adding different proportions of manganese-silicon compounds to Improve its characteristics, find the best characteristic parameters to make a module, and measure its thermoelectric characteristics. Our research results show that the N-type thermoelectric material obtained with Mg2.2(Si,Sn)+10% Mn5Si3 has a ZT value of 0.3-0.5 between room temperature to 200°C.
In this paper, the single-output test sample uses copper as the electrode, Mg2Sn as the electrode adhesive material, and the electrode is assembled at one time for long-time annealing. The single output test sample is used for thermoelectric performance measurement, and the maximum output power is 1.0108 (μW). | en_US |