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采用熔体旋甩法结合放电等离子烧结技术(MS-SPS)制备了p型填充式方钴矿化合物Ce0.3Fe1.5Co2.5Sb12,研究了熔体旋甩工艺对微结构以及热电性能的影响规律.结果表明,较高的铜辊转速和较低的喷气压力有利于提高熔体的冷却速率,使带状产物晶粒细化.薄带经SPS烧结后得到致密、基本单相、晶粒尺寸均匀细小(150—300 nm)的块体.与传统方法制备的试样相比,MS-SPS试样虽然电导率有所降低,但因具有较大的Se
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关键词:
- 熔体旋甩 /
- p型填充式方钴矿化合物 /
- 微结构 /
- 热电性能
Polycrystalline nanostructured bulk samples of p-type filled skutterudite Ce0.3Fe1.5Co2.5Sb12 have been prepared by melt-spinning (MS) method combined with spark plasma sintering (SPS). The effects of melt-spinning process on their microstructure and thermoelectric properties have been investigated. The results indicate that the ribbons have finer microstructure with the increasing cooling rate for melt-spun ribbons, resulting from the increasing copper wheel speed and decreasing ejection pressure. Compared with the sample prepared by traditional method, the samples prepared by MS-SPS method have higher power, factor due to the enhanced thermopower, despite the slightly reduced electrical conductivity. Meanwhile, the lattice thermal conductivity of the MS-SPS samples is significantly suppressed. Hence, the thermoelectric performance of the MS-SPS samples is greatly improved, and the figures of merit reach about 0.55 at 750 K.[1] Rowe D M 2006 Thermoelectrics Handbook Macro to Nano (Boca Raton,FL/London: CRC Press/Taylor & Francis)
[2] Tritt T M 1999 Science 283 804
[3] Sharp J W, Jones E C, Williams R K, Martin P M, Sales B C 1995 J. Appl. Phys. 78 1013
[4] Rowe D M 1995 CRC Handbook of Thermoelectrics(Boca Raton,FL:CRC Press)
[5] Liu W S, Zhang B P, Zhao L D, Li J F 2008 Chem. Mater. 20 7526
[6] Katsuyama S, Shichijo Y, Ito M, Majima K, Nagai H 1998 J. Appl.Phys. 84 6708
[7] Tang X F,Chen L D, Goto T, Hirai T, Yuan R Z 2000 Acta Phys.Sin. 49 1120 (in Chinese) [唐新峰、陈立东、後藤孝、平井敏雄、袁润章 2000 物理学报 49 1120]
[8] Sales B C,Mandrus D,Williams R K 1996 Science 272 1325
[9] Lamberton G A, Bhattacharya S,Littleton R T, Kaeser M A, Tedstrom R H, Tritt T M, Yang J, Nolas G S 2002 Appl.Phys.Lett 80 598
[10] Nolas G S, Kaeser M, Littleton R T,Tritt T M 2000 Appl. Phy. Lett. 77 1855
[11] Chen L D, Kawahara T, Tang X F, Goto T, Hirai T, Dyck J S, Chen W, Uher C 2001 J.Appl.Phys. 90 1864
[12] Hicks L D, Harman T C, Dresselhaus M S 1993 Appl.Phys. Lett. 63 3230
[13] Toprak M S, Stiewe C, Platzek D, Williams S, Bertini L,Müller E, Gatti C, Zhang Y, Rowe M,Muhammed M 2004 Adv. Funct. Mater. 14 1189
[14] Yu B L, Qi Q, Tang X F, Zhang Q J 2005 Acta Phys. Sin. 54 5763 (in Chinese) [余柏林、祁 琼、唐新峰、张清杰 2005 物理学报 54 5763]
[15] Li H, Tang X F, Su X L, Zhang Q J 2009 Appl. Phys. Lett. 92 202114
[16] Li H, Tang X F, Zhang Q J, Uher C 2009 Appl. Phys. Lett. 93 252109
[17] Tang X F, Chen L D, Goto T, Hirai T 2000 Acta Phys.Sin. 49 2437(in Chinese) [唐新峰、陈立东、後藤孝、平井敏雄 2000 物理学报 49 2437]
[18] Tang X F, Chen L D, Goto T, Hirai T 2000 Acta Phys.Sin. 49 2460(in Chinese) [唐新峰、陈立东、後藤孝、平井敏雄 2000 物理学报 49 2460]
[19] Li H, Tang X F, Su X L, Zhang Q J, Uher C 2009 J.Phys.D:Appl.Phys. 42 145409
[20] Li H, Tang X F, Cao W Q, Zhang Q J 2009 Chin. Phys.B 18 0287
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[1] Rowe D M 2006 Thermoelectrics Handbook Macro to Nano (Boca Raton,FL/London: CRC Press/Taylor & Francis)
[2] Tritt T M 1999 Science 283 804
[3] Sharp J W, Jones E C, Williams R K, Martin P M, Sales B C 1995 J. Appl. Phys. 78 1013
[4] Rowe D M 1995 CRC Handbook of Thermoelectrics(Boca Raton,FL:CRC Press)
[5] Liu W S, Zhang B P, Zhao L D, Li J F 2008 Chem. Mater. 20 7526
[6] Katsuyama S, Shichijo Y, Ito M, Majima K, Nagai H 1998 J. Appl.Phys. 84 6708
[7] Tang X F,Chen L D, Goto T, Hirai T, Yuan R Z 2000 Acta Phys.Sin. 49 1120 (in Chinese) [唐新峰、陈立东、後藤孝、平井敏雄、袁润章 2000 物理学报 49 1120]
[8] Sales B C,Mandrus D,Williams R K 1996 Science 272 1325
[9] Lamberton G A, Bhattacharya S,Littleton R T, Kaeser M A, Tedstrom R H, Tritt T M, Yang J, Nolas G S 2002 Appl.Phys.Lett 80 598
[10] Nolas G S, Kaeser M, Littleton R T,Tritt T M 2000 Appl. Phy. Lett. 77 1855
[11] Chen L D, Kawahara T, Tang X F, Goto T, Hirai T, Dyck J S, Chen W, Uher C 2001 J.Appl.Phys. 90 1864
[12] Hicks L D, Harman T C, Dresselhaus M S 1993 Appl.Phys. Lett. 63 3230
[13] Toprak M S, Stiewe C, Platzek D, Williams S, Bertini L,Müller E, Gatti C, Zhang Y, Rowe M,Muhammed M 2004 Adv. Funct. Mater. 14 1189
[14] Yu B L, Qi Q, Tang X F, Zhang Q J 2005 Acta Phys. Sin. 54 5763 (in Chinese) [余柏林、祁 琼、唐新峰、张清杰 2005 物理学报 54 5763]
[15] Li H, Tang X F, Su X L, Zhang Q J 2009 Appl. Phys. Lett. 92 202114
[16] Li H, Tang X F, Zhang Q J, Uher C 2009 Appl. Phys. Lett. 93 252109
[17] Tang X F, Chen L D, Goto T, Hirai T 2000 Acta Phys.Sin. 49 2437(in Chinese) [唐新峰、陈立东、後藤孝、平井敏雄 2000 物理学报 49 2437]
[18] Tang X F, Chen L D, Goto T, Hirai T 2000 Acta Phys.Sin. 49 2460(in Chinese) [唐新峰、陈立东、後藤孝、平井敏雄 2000 物理学报 49 2460]
[19] Li H, Tang X F, Su X L, Zhang Q J, Uher C 2009 J.Phys.D:Appl.Phys. 42 145409
[20] Li H, Tang X F, Cao W Q, Zhang Q J 2009 Chin. Phys.B 18 0287
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