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    Journals >Acta Physica Sinica >Volume 68 >Issue 11 >Page 117201-1 > Article
    • Acta Physica Sinica
    • Vol. 68, Issue 11, 117201-1 (2019)
    Comparative study of thermoelectric properties of Mg2Si0.3Sn0.7 doped by Ag or Li
    Guo-Cai Yuan1, Xi Chen2, Yu-Yang Huang2, Jun-Xi Mao1, Jin-Qiu Yu1, Xiao-Bo Lei1, and Qin-Yong Zhang1、2、*
    Author Affiliations
  • 1School of Materials Science and Engineering, Xihua University, Chengdu 610039, China
  • 2Xihua Honor College, Xihua University, Chengdu 610039, China
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    DOI: 10.7498/aps.68.20190247 Cite this Article
    Guo-Cai Yuan, Xi Chen, Yu-Yang Huang, Jun-Xi Mao, Jin-Qiu Yu, Xiao-Bo Lei, Qin-Yong Zhang. Comparative study of thermoelectric properties of Mg2Si0.3Sn0.7 doped by Ag or Li [J]. Acta Physica Sinica, 2019, 68(11): 117201-1 Copy Citation Text show less
    XRD patterns (a), (c) and lattice constant (b), (d) of Mg2(1－x)Ag2xSi0.3Sn0.7 (0 ≤ x ≤ 0.05) and Mg2(1－y)Li2ySi0.3Sn0.7 (0 ≤ y ≤ 0.08)Mg2(1－x)Ag2xSi0.3Sn0.7(0 ≤ x ≤ 0.05)和Mg2(1－y)Li2ySi0.3Sn0.7(0 ≤ y ≤ 0.08)的XRD图谱(a), (c)与晶格常数(b), (d)
    Fig. 1. XRD patterns (a), (c) and lattice constant (b), (d) of Mg2(1－x)Ag2xSi0.3Sn0.7 (0 ≤ x ≤ 0.05) and Mg2(1－y)Li2ySi0.3Sn0.7 (0 ≤ y ≤ 0.08) Mg2(1－x)Ag2xSi0.3Sn0.7(0 ≤ x ≤ 0.05)和Mg2(1－y)Li2ySi0.3Sn0.7(0 ≤ y ≤ 0.08)的XRD图谱(a), (c)与晶格常数(b), (d)
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    (a), (b) and (c) are SEM images of Mg2Si0.3Sn0.7, Mg1.9Ag0.1Si0.3Sn0.7, and Mg1.92Li0.08Si0.3Sn0.7; (d) the back scattered electron image of Mg1.92Li0.08Si0.3Sn0.7(a), (b), (c)分别为Mg2Si0.3Sn0.7, Mg1.9Ag0.1Si0.3Sn0.7，Mg1.92Li0.08Si0.3Sn0.7的SEM图像; (d) Mg1.92Li0.08Si0.3Sn0.7的背散射图像
    Fig. 2. (a), (b) and (c) are SEM images of Mg2Si0.3Sn0.7, Mg1.9Ag0.1Si0.3Sn0.7, and Mg1.92Li0.08Si0.3Sn0.7; (d) the back scattered electron image of Mg1.92Li0.08Si0.3Sn0.7(a), (b), (c)分别为Mg2Si0.3Sn0.7, Mg1.9Ag0.1Si0.3Sn0.7，Mg1.92Li0.08Si0.3Sn0.7的SEM图像; (d) Mg1.92Li0.08Si0.3Sn0.7的背散射图像
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    The Pisarenko plot between Seebeck coefficient S and carrier concentration pSeebeck系数S与载流子浓度p之间的Pisarenko关系
    Fig. 3. The Pisarenko plot between Seebeck coefficient S and carrier concentration pSeebeck系数S与载流子浓度p之间的Pisarenko关系
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    The temperature dependence of (a), (d) electrical conductivity, (b), (e) Seebeck coefficient and (c), (f) power factor for Mg2(1－x)Ag2xSi0.3Sn0.7 (0 ≤ x ≤ 0.05) and Mg2(1－y)Li2ySi0.3Sn0.7 (0 ≤ y ≤ 0.08)(a)—(f) Mg2(1－x)Ag2xSi0.3Sn0.7(0 ≤ x ≤ 0.05)和Mg2(1－y)Li2ySi0.3Sn0.7(0 ≤ y ≤ 0.08)的电导率、Seebeck系数和功率因子与温度的关系
    Fig. 4. The temperature dependence of (a), (d) electrical conductivity, (b), (e) Seebeck coefficient and (c), (f) power factor for Mg2(1－x)Ag2xSi0.3Sn0.7 (0 ≤ x ≤ 0.05) and Mg2(1－y)Li2ySi0.3Sn0.7 (0 ≤ y ≤ 0.08) (a)—(f) Mg2(1－x)Ag2xSi0.3Sn0.7(0 ≤ x ≤ 0.05)和Mg2(1－y)Li2ySi0.3Sn0.7(0 ≤ y ≤ 0.08)的电导率、Seebeck系数和功率因子与温度的关系
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    The temperature dependence of (a), (d) thermal conductivity, (b), (e) lattice thermal conductivity and (c), (f) ZT for Mg2(1－x)Ag2xSi0.3Sn0.7(0 ≤ x ≤ 0.05) and Mg2(1－y)Li2ySi0.3Sn0.7(0 ≤ y ≤ 0.08)(a)—(f) Mg2(1－x)Ag2xSi0.3Sn0.7(0 ≤ x ≤ 0.05)和Mg2(1－y)Li2ySi0.3Sn0.7(0 ≤ y ≤ 0.08)的热导率, 晶格热导率和ZT值与温度的关系图
    Fig. 5. The temperature dependence of (a), (d) thermal conductivity, (b), (e) lattice thermal conductivity and (c), (f) ZT for Mg2(1－x)Ag2xSi0.3Sn0.7(0 ≤ x ≤ 0.05) and Mg2(1－y)Li2ySi0.3Sn0.7(0 ≤ y ≤ 0.08) (a)—(f) Mg2(1－x)Ag2xSi0.3Sn0.7(0 ≤ x ≤ 0.05)和Mg2(1－y)Li2ySi0.3Sn0.7(0 ≤ y ≤ 0.08)的热导率, 晶格热导率和ZT值与温度的关系图
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    The relation of (a) the mass fluctuation scattering parameter ΓM, (b) strain field fluctuation scattering parameter ΓS and doping Ag, Li content of Mg2Si0.3Sn0.7Mg2Si0.3Sn0.7的掺杂Ag和Li浓度与质量场波动散射因子ΓM和应变场波动散射因子ΓS的关系
    Fig. 6. The relation of (a) the mass fluctuation scattering parameter ΓM, (b) strain field fluctuation scattering parameter ΓS and doping Ag, Li content of Mg2Si0.3Sn0.7Mg2Si0.3Sn0.7的掺杂Ag和Li浓度与质量场波动散射因子ΓM和应变场波动散射因子ΓS的关系
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    Compositionσ/104 S·m–1RH/cm3·C–1p/1019 cm–3μ/cm2·V–1·s–1S/μV·K–1m*(m0)
    x = 0 0.15–3.22–0.1948.3–458.01.6
    x = 0.01 3.480.1354.6446.8154.71.2
    x = 0.02 3.330.1733.6057.7166.41.1
    x = 0.03 3.730.1863.3569.5163.81.0
    x = 0.04 3.110.1554.0348.2160.61.1
    x = 0.05 3.620.1534.0953.7154.71.1
    y = 0.02 11.200.05611.1063.190.71.0
    y = 0.04 9.650.04414.0042.891.31.2
    y = 0.06 13.140.04214.7055.882.21.1
    y = 0.08 9.740.04115.1040.283.91.2
    Table 1.

    Physical parameters of Mg2(1－x)Ag2xSi0.3Sn0.7 (0 ≤ x ≤ 0.05) and Mg2(1－y)Li2ySi0.3Sn0.7 (0 ≤ y ≤ 0.08) at 300 K

    Mg2(1－x)Ag2xSi0.3Sn0.7(0 ≤ x ≤ 0.05)和Mg2(1－y)Li2ySi0.3Sn0.7(0 ≤ y ≤ 0.08)在300 K的物理参数

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    Guo-Cai Yuan, Xi Chen, Yu-Yang Huang, Jun-Xi Mao, Jin-Qiu Yu, Xiao-Bo Lei, Qin-Yong Zhang. Comparative study of thermoelectric properties of Mg2Si0.3Sn0.7 doped by Ag or Li [J]. Acta Physica Sinica, 2019, 68(11): 117201-1
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