热电效应
微晶
材料科学
热电材料
凝聚态物理
热导率
电阻率和电导率
功勋
晶体结构
无量纲量
格子(音乐)
结晶学
化学
冶金
热力学
复合材料
光电子学
物理
量子力学
声学
作者
Atsuko Kosuga,Ken Kurosaki,Hiroaki Muta,Shinşuke Yamanaka
摘要
We prepared polycrystalline-sintered samples of Tl2GeTe3, Tl4SnTe3, and Tl4PbTe3 and evaluated their thermoelectric properties. Although the electrical properties of these compounds were not optimized, the dimensionless figure of merit ZT was relatively high, i.e., 0.74 at 673K for Tl4SnTe3, 0.71 at 673K for Tl4PbTe3, and 0.29 at 473K for Tl2GeTe3, due to the very low lattice thermal conductivity of the compounds. Low lattice thermal conductivity appears to be closely related to the weak bonding of atoms and complex crystal structures of these compounds.
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