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- W2940228934 abstract "AbstractHigh values of the thermoelectric figure of merit ( ZT = 1.5) in Mg_2Si–Mg_2Sn solid solutions are caused by a low thermal conductivity and a complex band structure, which is optimal at the ratio of solid-solution components of 40% Mg_2Si and 60% Mg_2Sn. However, the presence of magnesium stannide in a high concentration impairs the mechanical properties and chemical stability of the material limiting its application at high temperatures. Magnesium silicide has a higher stability but a lower figure of merit. The figure of merit is much lower in Mg_2Si-rich solid solutions and amounts to ZT ~ 1. The possibility of increasing ZT in the Mg_2Si_0.8Sn_0.2 solid solution with the additional inclusion of Mg_2Ge in small quantities is investigated here. Samples of Mg_2(Si_1 –_ x Ge_ x )_0.8Sn_0.2 ( x < 0.03) solid solution are prepared by hot pressing. The temperature dependences of the coefficients of the thermoelectric power, electrical conductivity, and thermal conductivity are measured in the range of 300–800 K. An increase in the thermoelectric figure of merit to ZT = 1.1 is shown at T = 800 K in the Mg_2Si_0.78Ge_0.02Sn_0.2〈Sb〉 solid solution." @default.
- W2940228934 created "2019-04-25" @default.
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- W2940228934 date "2019-01-01" @default.
- W2940228934 modified "2023-09-25" @default.
- W2940228934 title "Термоэлектрические свойства твердого раствора n-Mg-=SUB=-2-=/SUB=-(SiGe)-=SUB=-0.8-=/SUB=-Sn-=SUB=-0.2-=/SUB=-" @default.
- W2940228934 doi "https://doi.org/10.21883/ftp.2019.05.47548.06" @default.
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