Thermoelectric properties of dual-element-filled skutterudites LaxCa0.1Co4Sb12
作者:P. L. Luo、K. Li、J. Xie、T. J. Zhu、X. B. Zhao
DOI:10.1002/pssa.200925491
日期:2010.11
Sb 12 (x=0, 0.2, 0.4, 0.6) skutterudites have been prepared by a simple melt-annealing method followed by hot pressing. In this study, charge-transport properties including the electrical conductivity σ, the Seebeck coefficient α, the thermal conductivity κ, and the Hall coefficient were presented. La-Ca double filling can effectively improve the thermoelectricproperties. The electrical conductivity
部分填充的La x Ca 0.1 Co 4 Sb 12 (x=0, 0.2, 0.4, 0.6) 方钴矿是通过简单的熔融退火方法然后热压制备的。在这项研究中,提出了包括电导率 σ、塞贝克系数 α、热导率 κ 和霍尔系数在内的电荷传输特性。La-Ca双重填充能有效提高热电性能。随着La含量的增加,电导率显着增加,而晶格热导率显着降低,导致ZT值大幅增加。在 735 K 时,La 0.4 Ca 0.1 Co 4 Sb 12 的 ZT 值增加了 0.75。
Synthesis and thermoelectric properties of KyCo4Sb12
作者:Y. Z. Pei、L. D. Chen、W. Zhang、X. Shi、S. Q. Bai、X. Y. Zhao、Z. G. Mei、X. Y. Li
DOI:10.1063/1.2397538
日期:2006.11.27
our earlier theoretical prediction. The measured transport properties (300–800K) show that K filling does not lower thermal conductivity much in comparison with AE or RE filling due to the relatively low mass of K atom. However, it improves electrical conductivity, retains large Seebeck coefficient, and leads to a reasonably good thermoelectric performance for the filled skutterudites. The maximum figure
成功合成了多晶 K 填充 CoSb3。K 填充的上限至少为 0.45,高于碱土 (AE) 或稀土 (RE) 金属,但与我们之前的理论预测一致。测量的传输特性(300-800K)表明,由于 K 原子的质量相对较低,与 AE 或 RE 填充相比,K 填充不会降低导热率。然而,它提高了导电性,保持了大的塞贝克系数,并为填充的方钴矿带来了相当好的热电性能。K0.38Co4Sb12 的最大品质因数 ZT 在 800K 时达到 1。
Thermoelectric properties of Fe-doped CoSb3 prepared by mechanical alloying and vacuum hot pressing
作者:Soon-Chul Ur、Joon-Chul Kwon、Il-Ho Kim
DOI:10.1016/j.jallcom.2006.08.369
日期:2007.9
Abstract Fe doped skutterudite CoSb 3 with a nominal composition of Fe x Co 4− x Sb 12 (0 ≤ x ≤ 2.5), were synthesized by mechanical alloying of elemental powders, and consolidated by vacuum hot pressing. Nanostructured, single-phase skutterudites were successfully produced for the compositions of x ≤ 1.5, while secondphase was found to form in case of x ≥ 2. Thermoelectricproperties including thermal
摘要 Fe掺杂方钴矿CoSb 3 的标称成分为Fe x Co 4− x Sb 12 (0 ≤ x ≤ 2.5),通过元素粉末的机械合金化合成,并通过真空热压固结。对于 x ≤ 1.5 的成分,成功生产了纳米结构的单相方钴矿,而在 x ≥ 2 的情况下发现形成第二相。测量和讨论了包括 300 至 600 K 热导率在内的热电特性。通过引入高达 x ≤ 1.5 的 Fe 掺杂以及通过增加纳米结构方钴矿中的声子散射,晶格热导率大大降低,从而提高了热电品质因数。
High-temperature thermoelectric properties of thallium-filled skutterudites
The high temperature thermoelectric (TE) properties of polycrystalline Tl-filled skutterudites TlxCo4Sb12 (x=0, 0.05, 0.10, 0.15, 0.20, and 0.25) were examined from room temperature to 750 K. All samples exhibited negative Seebeck coefficients. The electrical resistivity, absolute values of the Seebeck coefficient, and the lattice thermal conductivity were found to decrease with increasing Tl content
从室温到 750 K 检查多晶 Tl 填充方钴矿 TlxCo4Sb12(x=0、0.05、0.10、0.15、0.20 和 0.25)的高温热电 (TE) 特性。所有样品都表现出负塞贝克系数。发现电阻率、塞贝克系数的绝对值和晶格热导率随着 Tl 含量的增加而降低。Tl0.25Co4Sb12 表现出最好的 TE 性能;无量纲品质因数 ZT 的最大值在 600 K 时为 0.90。
Enhanced thermoelectric performance of lanthanum filled CoSb 3 synthesized under high pressure
significantly enhancedthermoelectricproperties. The power factor as high as 4600 μWm−1K−2 is reached for the optimal La0.29Co4Sb12 sample. Combined with the greatly suppressed thermal conductivity, the highest ZT of 1.06 is achieved at 863 K for La0.29Co4Sb12. Our results indicate the advantage of highpressure to increase the filling fraction, which benefits the thermoelectric performance enhancement of La-filled
摘要 采用高压合成方法成功合成了n型镧填充的CoSb3方钴矿。研究了结构、电和热电特性。合成的 LaxCo4Sb12 样品具有 Im 3 ¯ 对称的方钴矿结构。高压合成样品中La的最大填充率达到0.3,比常压合成样品高30%。因此,我们的样品显示出显着增强的热电性能。最佳 La0.29Co4Sb12 样品的功率因数高达 4600 μWm-1K-2。结合大大抑制的热导率,La0.29Co4Sb12 在 863 K 时达到了 1.06 的最高 ZT。我们的结果表明高压增加填充率的优势,