The preparation and characterization of some skutterudite related compounds

Lyons, A.; Gruska, R.P.; Case, Chris; Subbarao, S. N.; Wold, A.

doi:10.1016/0025-5408(78)90076-4

Cited by 33 publications

(7 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fitting parameters are very close to those of CoSb 3 , [11,13] except that A (the pre-factor for point defect scattering) is approximately 2 times larger. 8 suggested that the intrinsic gap may be even higher. We expect that alloy scattering between Ge and Se plays a smaller role in the enhanced point defect phonon scattering in this specimen because of the small mass difference (~ 8%) between Ge and Se.…”

Section: Resultsmentioning

confidence: 99%

CoGe_1.5Se_1.5: Synthesis and characterization

et al. 2003

View full text Add to dashboard Cite

Polycrystalline CoGe 1.5 Se 1.5 was synthesized and characterized. The compound is a member of the class of compounds with the skutterudite crystal structure. Synthesis assuming the above stoichiometry resulted in a n-type semiconductor with composition CoGe 1.452 Se 1.379 . The specimen exhibits a large room temperature Seebeck coefficient and resistivity. The electron mobility is very low and the thermal conductivity is lower than that of the binary skutterudite CoSb 3 . These properties can be attributed to the vacancies in the crystal lattice due to the non-stoichiometric nature of the specimen. The potential for thermoelectric applications of ternary skutterudites is also discussed.

show abstract

Section: Resultsmentioning

confidence: 99%

CoGe_1.5Se_1.5: Synthesis and characterization

et al. 2003

View full text Add to dashboard Cite

show abstract

“…These compounds can be prepared by isoelectronic substitution at the cation site M by pair of elements from 8 and 10 groups, e.g., Fe 0.5 Ni 0.5 Sb 3 (Kjekshus and Rakke, 1974), or by isoelectronic substitution on the anion site X by a pair of elements from 14 and 16 groups, e.g., CoGe 1.5 Te 1.5 (Vaqueiro et al , 2006). Lyons et al (1978) mentioned the synthesis of IrGe 1.5 Se 1.5 and structural relation of this compound to the cubic skutterudite structure (space group Im 3 ). These authors also noticed the presence of weak superstructure diffractions violating the Im 3 symmetry in the powder diffraction pattern; however, no details were given.…”

Section: Introductionmentioning

confidence: 99%

Crystallographic study of ternary ordered skutterudite IrGe_1.5Se_1.5

Laufek

Navrátil

2010

Powder Diffr.

View full text Add to dashboard Cite

The crystal structure of skutterudite-related phase IrGe1.5Se1.5 has been refined by the Rietveld method from laboratory X-ray powder diffraction data. Refined crystallographic data for IrGe1.5Se1.5 are a=12.0890(2) Å, c=14.8796(3) Å, V=1883.23(6) Å3, space group R3 (No. 148), Z=24, and Dc=8.87 g/cm3. Its crystal structure can be derived from the ideal skutterudite structure (CoAs3), where Se and Ge atoms are ordered in layers perpendicular to the [111] direction of the original skutterudite cell. Weak distortions of the anion and cation sublattices were also observed.

show abstract

“…In fact, resistivity measurements on IrGe 1.5 S 1.5 and IrGe 1.5 Se 1. 5 showed semiconducting temperature dependences. 5 In this paper we present electrical resistivity, Seebeck coefficient, thermal conductivity, magnetic susceptibility, and Hall measurements on two polycrystalline CoGe 1.5 Se 1.5 samples, and compare the results to those for CoSb 3 .…”

Section: Introductionmentioning

confidence: 99%

“…1, 2 Ternary skutterudite compounds with simultaneous substitution of group IV and VI atoms on the pnicogen sites have been previously reported. 4,5 These compounds should be semiconductors, as they are isoelectronic with CoSb 3 . In fact, resistivity measurements on IrGe 1.5 S 1.5 and IrGe 1.5 Se 1.…”

Section: Introductionmentioning

confidence: 99%

Transport properties ofCoGe1.5Se1.5

2003

View full text Add to dashboard Cite

We have synthesized and characterized polycrystalline n-and p-type CoGe 1.5 Se 1.5 , a member of the class of compounds with the skutterudite crystal structure. Both specimens have large room temperature Seebeck coefficients and resistivities. The carrier type depends very sensitively on the atomic ratio between Ge and Se. For both specimens, the carrier mobilities are very low and the thermal conductivity is lower than that of the binary skutterudite CoSb 3 . Some of these properties can be attributed to the vacancies in the crystal lattice due to the nonstoichiometric nature of the specimens studied. The transport properties are compared with those of CoSb 3 , and the potential for thermoelectric applications is discussed. This work is part of a continuing effort to explore the large phase space of many possible compositions of skutterudites, a promising class of highefficiency thermoelectric materials.

show abstract

The preparation and characterization of some skutterudite related compounds

Cited by 33 publications

References 4 publications

CoGe_1.5Se_1.5: Synthesis and characterization

CoGe_1.5Se_1.5: Synthesis and characterization

Crystallographic study of ternary ordered skutterudite IrGe_1.5Se_1.5

Transport properties ofCoGe1.5Se1.5

Contact Info

Product

Resources

About

The preparation and characterization of some skutterudite related compounds

Cited by 33 publications

References 4 publications

CoGe1.5Se1.5: Synthesis and characterization

CoGe1.5Se1.5: Synthesis and characterization

Crystallographic study of ternary ordered skutterudite IrGe1.5Se1.5

Transport properties ofCoGe1.5Se1.5

Contact Info

Product

Resources

About

CoGe_1.5Se_1.5: Synthesis and characterization

CoGe_1.5Se_1.5: Synthesis and characterization

Crystallographic study of ternary ordered skutterudite IrGe_1.5Se_1.5