Enhanced Thermoelectric Properties of Pb-doped BiCuSeO Ceramics
Enhanced Thermoelectric Properties of Pb-doped BiCuSeO Ceramics
复制标题
增强 Pb 掺杂 BiCuSeO 陶瓷的热电性能
DOI：
10.1002/adma.201301675
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发表时间：
2013-09-01
影响因子：
29.4
通讯作者：
Nan, C. -W.
中科院分区：
文献类型：
--
作者：
Lan, Jin-Le;Liu, Yao-Chun;Nan, C. -W.
Thermoelectric (TE) materials and devices realize direct heat electricity conversion and have attracted extensive interest owing to their widespread applications in the areas of solid state cooling, power generation, temperature measurement, and waste heat recovery.[1] The conversion efficiency is generally characterized by the dimensionless figure of merit ZT= S2σT/(κl+ κe), where T, S, σ, and κl (κe) are the temperature, Seebeck coefficient, electrical conductivity, and thermal conductivity from the lattice (electrons), respectively. State-of-the-art TE alloys [2–4] with high ZT values normally contain metal elements such as lead, tellurium, and antimony, which are rare in the Earth, toxic, or volatile. These materials thus have limited applications, particularly when the ambient temperature of the air is high. However, oxide-based semiconductors, which are thermally and chemically stable at high temperatures, have been regarded as promising candidates for utilizing waste heat generated in various industrial processes. Typical hightemperature TE oxides include several types of oxide ceramics (for example, SrTiO 3,[5] ZnO,[6] Ca 3Co 4O 9,[7] CaMnO 3,[8] andIn 2O 3),[9] which have been under extensive investigations for the past 20 years. However, the ZT value of such ceramicbased TE oxides is still too low to be used in the commercial applications owing to its mediocre electrical conductivity σ (≈ 100–200 S cm− 1) and high thermal conductivity κ=(κl+ κe)(≈ 2–10 W m− 1 K− 1). The lattice thermal conductivity κl could be somewhat reduced by increasing phonon scattering through the use of mass fluctuation,[10] grain boundaries,[11] complex
