Synthesis of catalyst based on sol microspheres coated with pyrolytic tungsten and study of its influence on production of metallic germanium

Kadomtsevа, A. V.; Ob”edkov, A. M.; Semenov, M. N.; Kaverin, B. S.; Гусев, С. А.

doi:10.1134/s1070427216110100

Cited by 5 publications

(2 citation statements)

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“…A record-high average zT of 0.32 was obtained for n-type Ge-free silicon-based TE material made from purified silicon waste between 323 and 1123 K. Currently, GaP, whose price is several dollars per kilogram, 46 is much cheaper than Ge, which is about $2000/kg. 47 And the additive amount of GaP is comparatively low, which is no more than 3.5 atom %. Besides, phosphorous is a kind of cheap material, and the method used for purifying silicon waste is a common and mature technology for processing cheap metals in the industry.…”

Section: Discussionmentioning

confidence: 99%

“…High power factor was maintained by optimizing the carrier concentration, while significant reduction of lattice thermal conductivity was achieved due to the multiscale phonon scattering including electron–phonon scattering, phonon–phonon scattering, grain boundary scattering, point defect scattering, and second phase scattering. A record-high average zT of 0.32 was obtained for n-type Ge-free silicon-based TE material made from purified silicon waste between 323 and 1123 K. Currently, GaP, whose price is several dollars per kilogram, is much cheaper than Ge, which is about $2000/kg . And the additive amount of GaP is comparatively low, which is no more than 3.5 atom %.…”

Section: Discussionmentioning

confidence: 99%

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High-Performance n-Type Ge-Free Silicon Thermoelectric Material from Silicon Waste

Liu

Zhang

Wolff

et al. 2021

ACS Appl. Mater. Interfaces

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Silicon waste (SW), a byproduct from the photovoltaic industry, can be a prospective and environmentally friendly source for silicon in the field of thermoelectric (TE) materials. While thermoelectricity is not as sensitive toward impurities as other semiconductor applications, the impurities within the SW still impede the enhancement of the thermoelectric figure of merit, zT. Besides, the high thermal conductivity of silicon limits its applications as a TE material. In this work, we employ traditionally metallurgical methods in industry reducing the impurities in SW to an extremely low level in an environmentally friendly and economical way, and then the thermal conductivity of purified silicon is greatly reduced due to the implementation of multiscale phonon scattering without degrading the power factor seriously. Benefiting from these strategies, from 323 to 1123 K, for the sample made from purified silicon waste, the average zT, relevant for engineering application, is increased to 0.32, higher than that of the state-of-the-art n-type Ge-free bulk silicon materials made from commercially available silicon, but the total cost of our samples is negligible.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%