Synthesis and characterisation of the compound CoSbS

被引:25
作者
Carlini, R. [2 ,3 ]
Artini, C. [1 ,2 ]
Borzone, G. [2 ,3 ]
Masini, R. [4 ]
Zanicchi, G. [2 ,3 ]
Costa, G. A. [1 ,2 ]
机构
[1] CNR SPIN Genova, I-16152 Genoa, Italy
[2] Univ Genoa, DCCI, I-16146 Genoa, Italy
[3] Natl Consortium Mat Sci & Technol, INSTM Genoa Res Unit, I-16146 Genoa, Italy
[4] CNR IMEM, I-16146 Genoa, Italy
关键词
Thermoelectrics; Intermetallics; Seebeck effect; Phase stability; THERMOELECTRIC PROPERTIES; DOPED COSB3; TRANSPORT-PROPERTIES; CRYSTAL-STRUCTURE; SKUTTERUDITES; TEMPERATURE; RH; TE; CO;
D O I
10.1007/s10973-010-1034-z
中图分类号
O414.1 [热力学];
学科分类号
摘要
In the search for new intermetallic materials with high thermoelectric performances, the Co-Sb-S ternary system has been explored and polycrystalline CoSbS samples have been prepared by a vapour phase technique starting from the pure elements. The crystal cell of CoSbS belongs to the Pbca space group and shows an orthorhombic structural arrangement with the following lattice parameters: a = 5.8341(2) angstrom; b = 5.9477(2) angstrom, and c = 11.6540(4) angstrom. The structure belongs to the pyrite-marcasite family, as Co forms tilted corner- and edge-sharing octahedra with three Sb and three S atoms. Scanning electronic microscopy (SEM), electron-probe microanalysis (EPMA) and X-ray powder diffraction were used to investigate the microstructure and to carry out the structural analysis; the crystal structure was refined by the Rietveld method using the DBWS-9807 program. The thermal stability of CoSbS was investigated referring to the ternary Co-S-Sb phase diagram and by differential thermal analysis (DTA) measurements. Thermoelectric power measurements at room temperature were also performed by a home-made instrument.
引用
收藏
页码:23 / 27
页数:5
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