采用悬浮熔炼法制备了Fe-Sm-Si热电合金材料,并研究了其电学输运特性.实验表明:在Fe1-xSmxSi2合金中,Sm为n型掺杂元素,Sm轻掺杂时,试样仍为p型,随着Sm量的增加,试样的Seebeck系数和功率因子都降低;Sm含量x (0.4的高Sm硅化物试样为n型,其中,热电性能最好的试样成分为Fe0.6Sm0.4Si2,其电阻率在10-5?@m数量级,而Seebeck系数仍达到80 ?V@K-1左右.其机理被认为是由于Sm的4f层电子的贡献.
参考文献
| [1] | Zhao X.B.;Zhu T.J. .Transport properties of rapid solidified Fe-Si-Mn-Cu thermoelectric alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):303-306. |
| [2] | Massashi Komabagashi;Shunji Ido .Change of Electrical Properties of Co-doped and Cr-doped FeSi2 Thin Films During Amorphous to Crystalline Transformation[J].Japanese Journal of Applied Physics,1992,100(01):22-26. |
| [3] | Isamu Yamanchi;Takashi Okamoto;Hajime Ohata;Itsuo Ohnaka .?-phase Transformation and Thermoelectric Power in FeSi2 and Fe2Si5 Based Alloys Containing Small Amounts of Cu[J].Journal of Alloys and Compounds,1997,260:162-171. |
| [4] | Nishida I .Study of Semiconductor-to-metal Transition in Mn-doped FeSi2[J].Physical Review,1973,B7:2710-2713. |
| [5] | Kojima T;Sakata M;Nishida I .Study on the Formation of Fe1-xMnSi2 From the Sintered FeSi-Fe2Si5 Eutectic Alloy Doped with Manganese[J].Journal of the Less-Common Metals,1990,162:39-49. |
| [6] | Kojima T;Mashumoto K;Okamoto M A;Nishida I .Formation of b-FeSi2 From the Sintered Eutectic Alloy FeSi-Fe2Si5 Doped with Cobalt[J].Journal of the Less-Common Metals,1990,159:299-305. |
| [7] | Gerald Mahan;Brian Sales;Jeff Sharp .THERMOELECTRIC MATERIALS: NEW APPROACHES TO AN OLD PROBLEM[J].Physics Today,1997(3):42-47. |
| [8] | DiSalvo F J .Thermoelectric Cooling and Power Generation[J].Science,1999,285:703-706. |
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%