在N2气保护下,采用电磁感应法制备了添加La的Bi2 Te3和Bi0.5 Sb1.5Te3.运用X射线粉末衍射、电感耦合等离子光谱和扫描电子显微镜对材料的物相成分和形貌进行了表征.研究了La对Bi2 Te3和Bi0.5Sb1.5Te3热电材料的电导率(σ)、Seebeck系数(S)和热导率(κ)的影响.实验结果表明,添加La明显降低了2种材料的热导率,提高了热电优值(ZT),添加La的Bi0.5Sb1.5Te3的热电优值在室温超过了1.
参考文献
| [1] | DiSalvo F J.Thermoelectric Coding and Power Generation[J].Science,1999,285:703-706. |
| [2] | Sharp J W.Selection and Evaluation of Materials for Thermoelectric Applications[J].Mater Res Soc Symp Proc,1997,478:15-24. |
| [3] | Hashimoto H,Kusunose T,Sekino T.Influence of Ionic Sizes of Rare Earths on Thermoelectric Properties of Perovskite-type Rare Earth Cobalt Oxides RCoO3 (R =Pr,Nd,Tb,Dy)[J].J Alloys Compd,2009,484:246-248. |
| [4] | Hu S H,Zhao X B,Zhu T J.Mn15 Bi34 Te51 and La15 Bi34Te51 Thermoelectric Materials by Mechanical Alloying[J].Rare Met Mat Eng,2002,31 (4):287-290. |
| [5] | Yang R G,Chen G,Dresselhaus M S.Thermal Conductivity Modeling of Core-Shell and Tubular Nanowires[J].Nano Lett,2005,5:1111-1115. |
| [6] | Yang R,Chen G,Dresselhaus M S.Thermal Conductivity of Simple and Tubular Nanowire Composites in the Longitudinal Direction[J].Phys Rev B,2005,72:125418. |
| [7] | Cutler M,Leavy J F,Fitzpatrick R L.Electronic Transport in Semimetallic Cerium Sulfide[J].Phys Rev,1964,133:A1143-A1152. |
| [8] | Poudel B,Dresselhaus M S,Chen G,et al.High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys[J].Science,2008,320:634-638. |
| [9] | Tritt T M.Thermoelectric Materials:Holey and Unholey Semiconductors[J].Science,1999,283:804-805. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%