利用熔融法和等离子放电烧结(sPs)制备单相双原子填充BaxEuyCo4Sb12方钴矿材料并测试其高温热电性能.实验发现,在高填充量下(x+y＞40％),材料在高温时具有高的功率因子(＞60 W/(cm·K2)).在方钴矿的晶格空洞中同时引入Ba和Eu两种填充原子,能增强晶格声子散射,从而大幅降低方钴矿的晶格热导.实验证实,BaxEuvC04Sb12体系的晶格热导显著降低,其室温晶格热导最低达1.7 W/(m·K).与此对应的是双原子填充BaxEuyCo4Sb12方钴矿材料的热电优值(ZT值)明显增大,其中Ba0.19Eu0.23Co4Sb12的ZT值在850 K时达到了1.3.
参考文献
| [1] | Slack G A.In:Rowe D M,editor.CRC Handbook of Thermoelectrics.Boca Raton,FL:CRC Press; 1995:407. |
| [2] | Sales B C,Mandrus D,Williams R K.Filled skutterudite antimonides:a new class of thermoelectric materials.Science,1996,272(5266):1325-1328. |
| [3] | Sales B C,Mandrus D,Chakoumakos B C,et al.Filled skutterudite antimonides:electron crystals and phonon glasses.Phys.Rev.B,1997,56(23):15081-15089. |
| [4] | Nolas G S,Cohn J L,Slack G A.Effect of partial void filling on the lattice thermal conductivity of skutterudites.Phys.Rev.B,1998,58(1):164-170. |
| [5] | Chen L D,Karahara T,Tang X F,et al.Anomalous barium filling fraction and n-type thermoelectric performance of BayCo4Sb12.J.Appl.Phy.,2001,90(8):1864-1868. |
| [6] | Zhao X Y,Shi X,Chen L D,et al.Synthesis and thermoelectric properties of Sr-filled skutterudite SryCo4Sb12.J.Appl.Phy.,2006,99(5):053711-1-4. |
| [7] | Puyet M,Lenoir B,Dauscher A,et al.High temperature transport properties of partially filled CaxCo4Sb12 skutterudites.J.Appl.Phy.,2004,95(9):4852-4855. |
| [8] | Morelli D T,Meisner G P,Chen B X,et al.Cerium filling and doping of cobalt triantimonide.Phys.Rev.B,1997,56(12):7376-7383. |
| [9] | Nolas G S,Kaeser M,Littleton V R T,et al.High figure of merit in partially filled ytterbium skutterudite materials.Appl.Phys.Lett.,2000,77(12):1855-1857. |
| [10] | Lamberton G A,Bhattacharya S,Littleton R T,et al.High figure of merit in Eu-filled CoSb3-based skutterudites.Appl.Phys.Lett.,2002,80(4):598-600. |
| [11] | Kuznetsov V L,Kuznetsov L A,Rowe D M.Effect of partial void filling on the transport properties of NdxCo4Sb12 skutterudites.J.Phys.:Condens.Matter,2003,15(29):5035-5048. |
| [12] | Pei Y Z,Chen L D,Zhang W,et al.Synthesis and thermoelectric properties of KyCo4Sb12.Appl.Phys.Lett.,2006,89(22):221107-1-3. |
| [13] | Pei Y Z.Yang J,Chen L D,et al.Improving thermoelectric performance of caged compounds through light-element filling.Appl.Phys.Lett.,2009,95(4):042101-1-3. |
| [14] | Sales B C,Chakoumakos B C,Mandrus D.Thermoelectric properties of thallium-filled skutterudites.Phys.Rev.B,2000,61(4):2475-2481. |
| [15] | Nolas G S,Takizawa H,Endo E,et al.Thermoelectric properties of Sn-filled skutterudites.Appl.Phys.Lett.,2000,77(10):52-54. |
| [16] | Nolas G S,Yang J,Takizawa H.Transport properties of germanium-filled CoSb3.Appl.Phys.Lett.,2004,84(25):5210-5212. |
| [17] | Uher C.In:Tritt T M,editor.Recent Trends in Thermoelectric Materials Research I,Semiconductors and Semimetals.CA:Academic Press,2000:139. |
| [18] | Yang J,Zhang W,Bai S Q,et al.Dual-frequency resonant phonon scattering in Bax RyCo4Sb12.Appl.Phys.Lett.,2007,90(19):192111-1-3. |
| [19] | Berardan D,Alleno E,Godart C,et al.Improved thermoelectric properties in double-filled Cey/2Yby/2Fe4－x(Co/Ni)xSb12 skutterudites.J.Appl.Phys.,2005,98(3):033710-1-6. |
| [20] | Lu Q M,Zhang J X,Zhang X,et al.Effects of double filling of La and Ce on thermoelectric properties of CemLanFe10Co3.0Sb12 compounds by spark plasma sintering.J.Appl.Phys.,2005,98:106107-1-3. |
| [21] | Tang X F,Li H,Zhang Q J,et al.Synthesis and thermoelectric properties of double-atom-filled skutterudite compounds CamCen FexCo4-xSb12.J.Appl.Phys.,2006,100(12):123702-1-8. |
| [22] | Bai S Q,Pei Y Z,Chen L D,et al.Enhanced thermoelectric performance of dual-element-filled skutterudite BaxCeyCo4Sb12.Acta Mater.Appl.,2009,57(11):3135-3139. |
| [23] | Bai S Q,Shi X,Chen L D.Lattice thermal transport in BaxREyCo4Sb12(RE=Ce,Yb,and Eu) double-filled skutterudites.Appl.Phys.Lett.,2010,96(20):202102-1-3. |
| [24] | Shi X,Kong H,Uher C,et al.Low thermal conductivity and high thermoelectric figure of merit in n-type Bax YbyCo4Sb12 doublefilled skutterudites.Appl.Phys.Lett.,2008,92(18):182101-1-3. |
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