Thermoelectric and Mechanical Properties of Environmentally Friendly Mg2Si0.3Sn0.67Bi0.03/SiC Composites

In this work, polycrystalline n-type Mg2Si0.30Sn0.67Bi0.03 dispersed with x wt % β-SiC nanoparticles (x = 0, 0.5, 1.0, 1.5, and 3.0) thermoelectric materials were fabricated by a solid-state reaction in a low-cost container, consolidated by hot-pressing. We obtained figure of merit values zT above 1...

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Published inACS applied materials & interfaces Vol. 11; no. 49; pp. 45629 - 45635
Main Authors Macario, Leilane R, Shi, Yixuan, Jafarzadeh, Parisa, Zou, Tianze, Kycia, Jan B, Kleinke, Holger
Format Journal Article
LanguageEnglish
Published American Chemical Society 11.12.2019
Subjects
composites
magnesium silicide
solid solutions
thermoelectric materials
silicon carbide
energy
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Summary:In this work, polycrystalline n-type Mg2Si0.30Sn0.67Bi0.03 dispersed with x wt % β-SiC nanoparticles (x = 0, 0.5, 1.0, 1.5, and 3.0) thermoelectric materials were fabricated by a solid-state reaction in a low-cost container, consolidated by hot-pressing. We obtained figure of merit values zT above 1.4 at 773 K along with enhanced mechanical properties by adding β-SiC into an Mg2Si0.30Sn0.67Bi0.03 matrix. Incorporation of SiC nanoparticles has thusly simultaneously increased toughness and, depending on the SiC content, thermoelectric performance. The peak figure of merit was improved from zT = 1.33 for Mg2Si0.30Sn0.67Bi0.03 to 1.45 for Mg2Si0.30Sn0.67Bi0.03 with 3 wt % at 773 K.
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ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.9b15348