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• W2907115241 startingPage "1442" @default.
• W2907115241 abstract "Type I clathrates of the composition K8E8Ge38 (E = Al, Ga, In) were prepared via the reaction of KH with E and Ge and thermoelectric properties measured in order to compare to K8Al8Si38, a promising thermoelectric material. The structures were confirmed with Rietveld refinement of powder diffraction patterns obtaining lattice parameters of 10.7729(2) Å, 10.7469(5) Å, and 10.9975(6) Å for E = Al, Ga, and In, respectively. Samples of K8E8Ge38 with E = Al and Ga were consolidated via spark plasma sintering for property measurements and determined to be 94.2% and 81.4% dense, respectively. K8In8Ge38 showed significant decomposition after sintering with both elemental In and Ge present in the powder diffraction pattern. The thermoelectric properties of K8E8Ge38 (E = Al, Ga) from 300–10 K were measured on sintered pellets. K8Al8Ge38 was found to have a Seebeck coefficient, electrical resistivity, and thermal conductivity of −35.8 μV/K, 2.56 mΩ·cm, 1.37 W/m·K at 300 K, respectively. K8Ga8Ge38 was found to be a compensated semiconductor with a Seebeck coefficient, electrical resistivity, and thermal conductivity of 4.19 μV/K, 1080 mΩ·cm, and 1.05 W/m·K at 300 K, respectively. The resistivity of K8Al8Ge38 is 46 times lower than K8Al8Si38 which has a Seebeck coefficient of −90.0 μV/K and thermal conductivity of 1.77 W/mK at 300 K, suggesting that a solid solution of K8Al8Si38-xGex has potential for optimal thermoelectric performance." @default.
• W2907115241 created "2019-01-11" @default.
• W2907115241 creator A5056081806 @default.
• W2907115241 creator A5065153617 @default.
• W2907115241 creator A5088795179 @default.
• W2907115241 date "2018-12-27" @default.
• W2907115241 modified "2023-10-17" @default.
• W2907115241 title "Hydride Synthesis and Thermoelectric Properties of Type-I Clathrate K₈E₈Ge₃₈ (E = Al, Ga, In)" @default.
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• W2907115241 doi "https://doi.org/10.1021/acs.inorgchem.8b02977" @default.
• W2907115241 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30589252" @default.
• W2907115241 hasPublicationYear "2018" @default.
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