Fasolin Stefano, Fiameni Stefania, Fanciulli Carlo, Battiston Simone, Famengo Alessia, Fabrizio Monica
J Nanosci Nanotechnol. 2017 Mar;17(3):1645-649. doi: 10.1166/jnn.2017.13733.
Nowadays, a big challenge in the thermoelectric field is the identification of efficient thermoelectric materials but inexpensive, easy to synthesize, and comprised of Earth-abundant elements. On this basis, tetrahedrite mineral family (Cu(12−x)Tr(x)Sb₄S₁₃ where Tr = Cu, Mn, Fe, Co, Ni, Zn) seems to be an attractive p-Type Pb-free thermoelectric material, showing a relatively high conversion efficiency. In this work, a solvothermal synthesis method was developed for undoped tetrahedrite Cu₁₂Sb₄S₁₃ and the introduction of Zn and Ni as substituents of copper was also tested. The influence of the stoichiometry and the synthesis conditions on the tetrahedrite phase content and density of the samples were investigated by X-ray diffraction (with profile Rietveld refinements) and scanning electron microscope (equipped with energy dispersive X-ray spectroscopy). Preliminary sintering test were performed by Open Die Pressing.
如今，热电领域的一大挑战是识别高效但价格低廉、易于合成且由储量丰富的元素组成的热电材料。在此基础上，黝铜矿矿物族（Cu(12−x)Tr(x)Sb₄S₁₃，其中Tr = Cu、Mn、Fe、Co、Ni、Zn）似乎是一种有吸引力的p型无铅热电材料，具有相对较高的转换效率。在这项工作中，开发了一种溶剂热合成方法用于制备未掺杂的黝铜矿Cu₁₂Sb₄S₁₃，并且还测试了引入Zn和Ni作为铜的取代物。通过X射线衍射（采用轮廓Rietveld精修）和扫描电子显微镜（配备能量色散X射线光谱仪）研究了化学计量比和合成条件对样品中黝铜矿相含量和密度的影响。通过开模压制进行了初步烧结试验。
