Open AccessThe structure and X-ray photoelectron spectroscopy analysis of double-atom filled skutterudite compounds
Author(s) -
Li Han,
Xinfeng Tang,
Wenyu Zhao,
Qingjie Zhang
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.6506
Subject(s) - skutterudite , x ray photoelectron spectroscopy , materials science , rietveld refinement , atom (system on chip) , chemical state , crystallography , spectroscopy , analytical chemistry (journal) , crystal structure , chemistry , nuclear magnetic resonance , physics , thermal conductivity , thermoelectric materials , quantum mechanics , chromatography , computer science , embedded system , composite material
Double-atom filled single-phase CamCenFexCo4-xSb12 compounds were synthesized through a melting—quenching—diffusion—annealing procedure. Ca and Ce were used as filling atoms. The structure of double-atom filled skutterudite compounds was investigated via Rietveld refinement and X-ray photoelectron spectroscopy analysis. The results of Rietveld refinement indicate that CamCenFexCo4-xSb12 compounds have skutterudite structure, and the Sb-icosahedron voids were filled with Ca or Ce. The thermal parameter (B) of Ca/Ce is much larger than those of Sb and Fe/Co in the compounds. The specific chemical states of atoms were obtained from X-ray photoelectron spectroscopy quantitative analysis, the results show that the Sb atoms have five chemical states, and the relative percentages of Sb atoms in different chemical states are correlative with the total filling fraction. The filling atoms tend to be located at the center of the voids of the Sb-icosahedrons preferentially.