Hg0.04Zn3.96Sb3: Synthesis, Crystal Structure, Phase Transition, and Thermoelectric Properties
Hg0.04Zn3.96Sb3: Synthesis, Crystal Structure, Phase Transition, and Thermoelectric Properties
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DOI：
10.1021/cm702247b
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发表时间：
2007-11
影响因子：
8.6
通讯作者：
B. Pedersen;H. Birkedal;E. Nishibori;A. Bentien;M. Sakata;M. Nygren;P. Frederiksen;B. Iversen
中科院分区：
文献类型：
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作者：
B. Pedersen;H. Birkedal;E. Nishibori;A. Bentien;M. Sakata;M. Nygren;P. Frederiksen;B. Iversen
热电材料Zn4Sb3是通过引入1At来掺汞的。%Hg加入合成混合物，生成Hg0.04Zn3.96Sb3。用多温短波长同步X射线粉末衍射、扫描电子显微镜/能谱、差示扫描量热仪(DSC)和物性测试对掺杂化合物和未掺杂的参照物进行了表征。Rietveld精细计算表明，汞取代只发生在无序的室温β相晶体结构的锌骨架位置上，而间隙位置是无汞的。精炼的成分表明掺杂水平为0.6%。扫描电子显微镜/能谱分析表明，剩余的汞以元素汞的形式存在，在汞的冻结温度以下存在与结晶汞相对应的峰，在汞的超导转变温度处存在电阻率的下降。多温同步辐射X射线粉末衍射数据的Rietveld修正(180K<；T<；290K，ΔT=10K).
The thermoelectric material Zn4Sb3 was mercury doped by introduction of 1 at. % Hg into the synthesis mixture, resulting in Hg0.04Zn3.96Sb3. The doped compound and an undoped reference were characterized by multitemperature short wavelength synchrotron X-ray powder diffraction, SEM/EDX, differential scanning calorimetry (DSC), and physical property measurements. Rietveld refinements suggest that mercury substitution takes place solely on the Zn1 framework site of the disordered room temperature β-phase crystal structure, while the interstitial positions are mercury-free. The refined composition suggests a doping level of 0.6%. The remaining mercury is present as elemental Hg as evidenced by SEM/EDX analysis, the presence of peaks corresponding to crystalline Hg below the Hg freezing temperature, and the presence of a drop in the resistivity at the superconducting transition temperature of Hg. Rietveld refinements of multitemperature synchrotron X-ray powder diffraction data (180 K < T < 290 K, ΔT = 10 K) ...