YbxCo4Sb12 polycrystals were fabricated by vacuum melting combined with hot-press sintering.The effect of Yb-filling on thermoelectric property of unfilled skutterudite CoSb3 was investigated,which indicated the enhancement of the power factor of the material.Transport properties of materials changed from semi-conductor to semi-metal during the measurement of electrical conductivity,which indicated the change of electronic band structure.The maximum value of electrical conductivity was about 190000 S/m at 300 K for all samples.On the basis of Yb-filling,power factor of Yb0.2Co4Sb12 reached 5-6 mW/(m.K) during the measurement temperature.Thermal conductivity decreased with increase of Yb content,and the thermal conductivity of Yb0.2Co4Sb12 reached 3.2 W/(m·K) at 600 K.The ZT value of Yb0.2Co4Sb12 reached 1.16 at 700 K due to positive contribution from high power factor and low thermal conductivity.
参考文献
| [1] | Eric S. Toberer;Andrew F. May;G. Jeffrey Snyder .Zintl Chemistry for Designing High Efficiency Thermoelectric Materials[J].Chemistry of Materials: A Publication of the American Chemistry Society,2010(3):624-634. |
| [2] | Shi X;Chen LD;Bai SQ;Huang XY;Zhao XY;Yao Q;Uher C .Influence of fullerene dispersion on high temperature thermoelectric properties of BayCo4Sb12-based composites[J].Journal of Applied Physics,2007(10):103709-1-103709-7-0. |
| [3] | Liu H Q;Song Y;Zhang S N;Zhao X B Wang F P .Thermoelectric properties of Ca3-xYxCo4O9+δ ceramics[J].Journal of Physics and Chemistry of Solids,2009,70:600. |
| [4] | Lin Wang;Gang Chen;Qun Wang .Shape-Controlled Synthesis and Electrical Conductivities of AgPb_(10)SbTe_(12) Materials[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2010(13):5827-5834. |
| [5] | Bilc D I;Mahanti S D;Kanatzidis M G .Eloctronic transport properties of PbTe and AgPbmSbTe2+m systems[J].Physical Review B,2006,74:125202. |
| [6] | Hsu K F;Loo S;Guo F;Chen W Dyck J S Uher C Hogan T Polychroniadis E K Mercouri G Kanatzidis M G .Cubic AgPbmSbTe2+m:Bulk thermoelectric materials with high figure of merit[J].Science,2004,303:818. |
| [7] | Slack G;D.M.Rowe.CRC Handbook of Thermoeloctrics[M].Boca Raton:crc Press,1995 |
| [8] | Sales B C;Mandrus D;Williams R K .Filled Skutterudite antimonides:A new class of thermoelectric materials[J].Science,1996,272:1325. |
| [9] | Li H;Tang X F;Zhang Q J;Uher C .Rapid preparation method of bulk nanostructred Yb0.3Co4Sb12+y compounds and their improved thermoelectric performance[J].Applied Physics Letters,2008,93:252109. |
| [10] | Liu WS;Zhang BP;Li JF;Zhang HL;Zhao LD .Enhanced thermoelectric properties in CoSb3-xTex alloys prepared by mechanical alloying and spark plasma sintering[J].Journal of Applied Physics,2007(10):103717-1-103717-7-0. |
| [11] | Liu H Q;Gao H L;Gu Y J;Zhao X B .Effect of Y-filling on thermoeloctric properties of CoSb3[J].Journal of Rare Earths,2011,29(05):596. |
| [12] | Lu P X;Wu F;Han H L;Wang Q Shen Z G Hu X .Thermoelectric properties of rare earths filled CoSb3 based nanostructure skutterudite[J].Journal of Alloys and Compounds,2010,505:255. |
| [13] | Caillat T.;Fleurial JP.;Borshchevsky A. .PROPERTIES OF SINGLE CRYSTALLINE SEMICONDUCTING COSB3[J].Journal of Applied Physics,1996(8):4442-4449. |
| [14] | Sharp J W;Jones E C;Martin R K;Sales B C .Thermoelectric pro.perties of CoSb3 and related alloys[J].Journal of Applied Physics,1995,7g:1013. |
| [15] | Yang J;Hao Q;Wang H;Lan Y C He Q Y Minnich A Wang D Z Harriman J A Varki V M Dresselhaus M S Chen G Ren Z F .Solubility study Of Yb in n-type skutterudites YbxCo4Sb12 and their enhanced thermoelectric properties[J].Physical Review B:Condensed Matter,2009,80:115329. |
| [16] | Nolas G S;Kaeser M;Littleton R T;Tritt T M .High figure of merit in partially filled ytterbium skutterudite materials[J].Applied Physics Letters,2000,77:1855. |
| [17] | Peng J;He J;Su Z;Alboni P N Zhu S Tritt T M .High ten perature thermoelectric properties of double-filled InxYbyCo4Sb12 skutterudites[J].Journal of Applied Physics,2009,105:084907. |
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