摘要Functional gradient materials (FGMs) in thermoelectric materials can raise the maximal power output of the thermoelectric generator (TEG). We report an FGM of n-PbTe with continuous carrier concentration successfully prepared by a unidirectional solidification method. The continuous carrier concentration for n-PbTe was optimized by different dopants of PbI2, Al and Zr and solidifying temperature. The effective maximum outputting power for continuous FGM PbTe is about 30% larger than that for jointed FGM PbTe.
Abstract：Functional gradient materials (FGMs) in thermoelectric materials can raise the maximal power output of the thermoelectric generator (TEG). We report an FGM of n-PbTe with continuous carrier concentration successfully prepared by a unidirectional solidification method. The continuous carrier concentration for n-PbTe was optimized by different dopants of PbI2, Al and Zr and solidifying temperature. The effective maximum outputting power for continuous FGM PbTe is about 30% larger than that for jointed FGM PbTe.
[1] Wood C 1988 Rep. Prog. Phys. 51 459 [2] Wang H C, Wang C L, Zhang J L et al 2009 Chin. Phys. Lett. 26 107301 [3] Ioffe A F 1960 Patent USSR No 126158, 4 22 (in Russian) [4] Hirano T, Whitlow LW and Miyajima M 1993 Functionally Gradient Materials (Westerville, OH: The American Ceramic Society) vol 34 p 23 [5] Ren G Z, Jia X P, Zhu P W et al 2005 Chin. Phys. Lett. 22 236 [6] Zhu P W, Imai Y, Isoda Y et al 2005 Chin. Phys. Lett. 22 2103 [7] Goff J F and Lowney J R 1976 Proc. 1 st ICTEC} p 47 [8] Müller E, Schackenberg K, Schilz J and Kaysser W A 1999 Mater. Sci. Forum 308--311 681 [9] Lugscheider E and Langer G 1999 Mater. Sci. Forum 308--311 748 [10] Imai Y, Shinohara Y and Isoda Y 2002 TEC Tokyo p 104 (in Japanese) [11] Uemura K and Nishida I 1988 Nikkan Kogyo Shimbun Ltd p 145 (in Japanese) [12] Zhu P W, Imai Y, Isoda Y et al 2005 J. Phys.: Condens. Matter 17 7319
2010, Vol. 27 
