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	Coupling scattering effect between grain boundary and point defect on the thermoelectric transport process in Co1-xNixSb3-ySey
	Liu Wei-Shu ; Zhang Bo-Ping ; Li Jing-Feng ; Zhang Hai-Long ; Zhao Li-Dong
	2010-05-10 ; 2010-05-10
关键词	CoSb3 Ni & Se co-doping thermoelectric coupling scattering effect LATTICE THERMAL-CONDUCTIVITY FILLED SKUTTERUDITES COSB3 COMPOUND TEMPERATURES MODEL Physics, Multidisciplinary
中文摘要	Ni and Se co-doped skutterudite compounds Co1-x Ni-x Sb3 - y Se-y with fine grains were fabricated by combining mechanical alloying and spark plasma sintering. The coupling effect between grain boundary scattering and point defect scattering on the thermoelectric transport properties was focused. The enhanced power factor by co-doping is twice that of the sample without Ni and achieved a maximum value of 1750 mu Wm (-1) K-2 at 450 degrees C for x = 0. 1. Due to the coupling scattering effect, the lattice thermal conductivity at room temperature decreased to 1. 67 Wm K-1 (-1) which approach the reported minimum of 1.60 Wm (-1) K (-1), whareas the improved ZT value reached 0.53 at 450 degrees C for the Co-0.9 Ni-0.1 Sb-2.85 Se-0.15 . A suggested model shows that the decreased thermal conductivity is duc to the coupling effect between grain boundary scattering and point defect scattering, The calculated values are in good agreement with experimental results. The simulated results also suggest that the lattice thermal conductivity could be further decreased to 0. 8 Wm (-1) K (-1) when the grain size was reduced to 50 nm.
语种	中文 ; 中文
出版者	CHINESE PHYSICAL SOC ; BEIJING ; P O BOX 603, BEIJING 100080, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/21798]
专题	清华大学
推荐引用方式 GB/T 7714	Liu Wei-Shu,Zhang Bo-Ping,Li Jing-Feng,et al. Coupling scattering effect between grain boundary and point defect on the thermoelectric transport process in Co1-xNixSb3-ySey[J],2010, 2010.
APA	Liu Wei-Shu,Zhang Bo-Ping,Li Jing-Feng,Zhang Hai-Long,&Zhao Li-Dong.(2010).Coupling scattering effect between grain boundary and point defect on the thermoelectric transport process in Co1-xNixSb3-ySey..
MLA	Liu Wei-Shu,et al."Coupling scattering effect between grain boundary and point defect on the thermoelectric transport process in Co1-xNixSb3-ySey".(2010).

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