How thermoelectric properties of p-type Tl-filled skutterudites are improved
How thermoelectric properties of p-type Tl-filled skutterudites are improved
复制标题
DOI：
10.1063/1.4821626
复制
发表时间：
2013-09
期刊：
影响因子：
6.1
通讯作者：
Donghun Kim;K. Kurosaki;Y. Ohishi;H. Muta;S. Yamanaka
中科院分区：
文献类型：
--
作者：
Donghun Kim;K. Kurosaki;Y. Ohishi;H. Muta;S. Yamanaka
研究了p型tl填充方晶石TlxFe1Co3Sb12 （x = 0、0.2、0.4、0.6、0.8）的高温热电性能。当x≤0.4时，样品为单相tl填充的方角石，而当x = 0.6和0.8时，样品由TlxFe1Co3Sb12 （x≈0.4）为基体相和Tl-Fe-Sb三元合金两相组成。添加Tl能有效降低热导率（κ），但二次相能略微提高κ。在723 K时，Tl0.2Fe1Co3Sb12的无因次品质图ZT （=S2T/ρ/κ，其中T为绝对温度）的最大值为0.36。
The high-temperature thermoelectric properties of p-type Tl-filled skutterudites TlxFe1Co3Sb12 (x = 0, 0.2, 0.4, 0.6, and 0.8) were examined. While samples with x ≤ 0.4 were single-phase Tl-filled skutterudite, samples with x = 0.6 and 0.8 were composed of two phases: TlxFe1Co3Sb12 (x ≈ 0.4) as the matrix phase and a Tl-Fe-Sb ternary alloy. The thermal conductivity (κ) was reduced effectively by Tl addition, but the secondary phase increased κ slightly. The maximum value of the dimensionless figure of merit ZT (=S2T/ρ/κ, where T is the absolute temperature) was 0.36 at 723 K for Tl0.2Fe1Co3Sb12.