Mass production of magnesium silicide as a TEG material

Schönhoff, M.; Hilleringmann, Ulrich; Boor, Johannes de

doi:10.1109/afrcon.2017.8095620

Cited by 1 publication

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References 9 publications

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“…Powder processing has been however demonstrated with conventional pressureless sintering of cold-pressed samples [18]. Unfortunately, the temperature (about 1050 °C) and processing time to obtain dense samples, due to very high vapor pressure and the strong tendency towards the MgO formation, require the use of extremely flammable reducing atmospheres, and to encapsulate Mg 2 Si green pellets into suitable alumina containers.…”

Section: Mg 2 Simentioning

confidence: 99%

Ultrafast high-temperature sintering and thermoelectric properties of n-doped Mg₂Si

et al. 2023

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Ultrafast High-temperature Sintering (UHS) is a recently proposed technique able to synthesize and sinter dense materials within seconds. Although UHS has already proved its effectivity with a large set of materials, spanning from refractory ceramics to complex metal alloys, any application to thermoelectric materials is today still lacking. Mg2Si is a well-established thermoelectric material. It is based on wide available non-critical raw materials, it is non-toxic, lightweight and it express its best thermoelectric performances in the intermediate temperature range (up to about 600 °C). Mg2Si is typically produced with powder processing by Spark Plasma Sintering, partially limiting its widespread diffusion also due to the costly production technique. Here we present a simple route to sinter Mg2Si pressed powders by UHS. The process allowed to obtain dense samples (with relative densities >95%) with 20 seconds heating up to about 1080 °C followed by a rapid free cooling, with a total thermal history below 1 minute, with energy demands at the Wh scale. The high process rate proved its efficacy in preventing grain growth and in avoiding any significant Mg evaporation. A full thermoelectric functional characterization is presented for Mg2Si and Bi-doped Mg2Si, together with a comparison with SPS-produced properties.

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Section: Mg 2 Simentioning

confidence: 99%

Ultrafast high-temperature sintering and thermoelectric properties of n-doped Mg₂Si

et al. 2023

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Mass production of magnesium silicide as a TEG material

Cited by 1 publication

References 9 publications

Ultrafast high-temperature sintering and thermoelectric properties of n-doped Mg₂Si

Ultrafast high-temperature sintering and thermoelectric properties of n-doped Mg₂Si

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Mass production of magnesium silicide as a TEG material

Cited by 1 publication

References 9 publications

Ultrafast high-temperature sintering and thermoelectric properties of n-doped Mg2Si

Ultrafast high-temperature sintering and thermoelectric properties of n-doped Mg2Si

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Ultrafast high-temperature sintering and thermoelectric properties of n-doped Mg₂Si

Ultrafast high-temperature sintering and thermoelectric properties of n-doped Mg₂Si