稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
Journal of Rare Earths
2015年
10期
1093-1097
,共5页
闵武茂%郭凯%王继伟%赵景泰
閔武茂%郭凱%王繼偉%趙景泰
민무무%곽개%왕계위%조경태
Zintl phase compounds%chemical substitution%solid-state reaction%thermoelectric properties%rare earths
Polycrystalline samples of Zintl phase EuCd2–xMnxSb2 (0.0≤x≤0.6) with the CaAl2Si2-type crystal structure (space group P3m1) were synthesized via a solid-state reaction followed by suitable cooling, annealing and spark plasma sintering (SPS) processes. In samples withx=0.0, 0.1, 0.2, 0.4 and 0.6, the electrical conductivity, Seebeck coefficient, and thermal conductivity were performed as a function of temperature from 300 to 650 K. It was found that chemical substitution of Mn failed to optimize the thermoelectric properties ofp-type conductive EuCd2Sb2. It was because that the Mn substitution induced the minority carriers (electrons), resulting in decreasing the electrical conductivity drastically despite the fact that it enlarged the Seebeck coefficient and reduced the thermal conductivity synchronously.
