| Preparation and thermoelectric properties of ternary rare earth sulfide γ-Ce_(3–x)Eu_xS_4 |
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| 作者单位： | MOE Laboratory of Bioinorganic and Synthetic Chemistry，State Key Laboratory of Optoelectronic Materials and Technologies，School of Chemistry and Chemical Engineering，Sun Yat-Sen University，Institute of Materials Science and Engineering，Henan Polytechnic University |
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| 摘 要： | The effect of Eu-substitution on the density and thermoelectric properties of ternary sulfide Ce3–xEuxS4 (0≤x≤0.8) compacts was investigated. Ce3–xEuxS4 powders were prepared via the sulfurization of the oxide using CS2 gas at 1473 K. The pressureless sintered Ce3–xEuxS4 compacts in the atmosphere were crystallized in the γ-phase. The density of the Ce3–xEuxS4 compacts increased with the increas-ing of Eu-substitution. Eu-substitution yielded a higher Seebeck coefficient and lower electrical resistivity. The highest value of the thermoe-lectric power factor of 1.41×10–4 W/K2m was obtained for the Ce2.2Eu0.8S4 compact at 673 K. It indicated that Eu-substitution was effective for improving thermoelectric properties of Ce3–xEuxS4.
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| 关 键 词： | Ce3–xEuxS4 pressureless sintering electrical resistivity Seebeck coefficient thermoelectric power factors rare earths |
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