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| Thermoelectric properties of Bi_（1.5）Pb_（0.5）Sr_（2-x）La_xCo_2O_y polycrystalline materials | |
| 引用本文： | YE Jinqin a,LI Haidong a, HE Qinglin b a Department of Mathematical , Physical Sciences,Henan Institute of Engineering,Zhengzhou ,China b Department of Physics,Jiaozuo Teacher’s College,Jiaozuo ,China.Thermoelectric properties of Bi_（1.5）Pb_（0.5）Sr_（2-x）La_xCo_2O_y polycrystalline materials[J].稀有金属(英文版),2011,30(5):501-504. |
| 作者姓名： | YE Jinqin a LI Haidong a HE Qinglin b a |
| 作者单位： | YE Jinqin a,LI Haidong a,and HE Qinglin b a Department of Mathematical and Physical Sciences,Henan Institute of Engineering,Zhengzhou 451191,China b Department of Physics,Jiaozuo Teacher’s College,Jiaozuo 454001,China |
| 基金项目： | supported by the Program for Innovative Research Team (in Science and Technology) (No. 2009IRTHNIE05) in Henan Institute of Engineering; the Foundation for University Key Teachers of Henan Province (No. 2008136); the Natural Science Fund of Henan Education Department, China (No. 2010C140001); the Youth Fund of Henan Institute of Engineering (No. Y10021) |
| 摘 要： | Polycrystalline samples of Bi 1.5 Pb 0.5 Sr 2-x La x Co 2 O y (x = 0.1, 0.2, 0.3) with a layered structure were prepared by solid-state reaction method. All samples are p-type semiconductors. The thermoelectric properties, namely, the electric resistivity (ρ), Seebeck coefficient (S), and power factor (S 2 /ρ) of the samples are dependent on chemical composition. The values of ρ, S, and S 2 /ρ increase with an increase in temperature for all samples. The substitution of Pb 2+ for Bi 3+ and La 3+ for Sr 2+ improves the thermoelectric properties of the Bi 2 Sr 2 Co 2 O y system owing to the simultaneous decrease of electric resistivity and increase of Seebeck coefficient. As a result, the optimal thermoelectric property has been obtained in Bi 1.5 Pb 0.5 Sr 1.7 La 0.3 Co 2 O y and the power factor can reach 2.1 × 10-4 W·m-1 K-2 at 998 K. |
| 关 键 词： | cobalt layered oxides La-doping thermoelectric properties |
Thermoelectric properties of Bi1.5Pb0.5Sr2?x La x Co2O y polycrystalline materials |
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| Jinqin Ye,Haidong Li,Qinglin He.Thermoelectric properties of Bi1.5Pb0.5Sr2?x La x Co2O y polycrystalline materials[J].Rare Metals,2011,30(5):501-504. | |
| Authors: | Jinqin Ye Haidong Li Qinglin He |
| Affiliation: | 1. a Department of Mathematical and Physical Sciences, Henan Institute of Engineering, Zhengzhou 451191, China 2. Department of Mathematical and Physical Sciences, Henan Institute of Engineering, Zhengzhou 451191, China 3. Department ofPhysics, Jiaozuo Teacher's College, Jiaozuo 454001, China |
| Abstract: | Polycrystalline samples of Bi1.5Pb0.5Sr2-xLaxCo2Oy (x =0.1,0.2,0.3) with a layered structure were prepared by solid-state reaction method.All samples are p-type semiconductors.The thermoelectric properties,namely,the electric resistivity (p),Seebeck coefficient (S),and power factor (S2/p) of the samples are dependent on chemical composition.The values of p,S,and S2/p increase with an increase in temperature for all samples.The substitution of Pb2+ for Bi3+ and La3+ for Sr2+ improves the thermoelectric properties of the Bi2Sr2Co2Oy system owing to the simultaneous decrease of electric resistivity and increase of Seebeck coefficient.As a result,the optimal thermoelectric property has been obtained in Bi1.5Pb0.5Sr1.7La0.3Co2Oy and the power factor can reach 2.1 × 10-4 W.m-1.K-2 at 998 K. |
| Keywords: | cobalt layered oxides La-doping thermoelectric properties low compared |
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