Enhanced thermoelectric performance in CdO by nano-SiO2 inclusions

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	Enhanced thermoelectric performance in CdO by nano-SiO2 inclusions
	Li, LJ ; Liang, S ; Li, SM ; Wang, JL ; Wang, SF ; Dong, GY ; Fu, GS
刊名	NANOTECHNOLOGY
	2014
卷号	25 期号:42
关键词	thermoelectric nano composite thermal conductivity
ISSN号	0957-4484
通讯作者	Li, LJ (reprint author), Hebei Univ, Coll Phys Sci & Technol, Hebei Key Lab Opt Elect Informat & Mat, Baoding 071002, Peoples R China.
中文摘要	We report enhanced thermoelectric (TE) performance in CdO by using thermally insulating nano-particles to mimic nano pores in the composite. Through simply mechanical alloying, we fabricated CdO-SiO2 composites with varying nano-SiO2 concentration from 0.1 to 3 at%. Due to the very low thermal conductivity of nano-SiO2 distributed in the CdO matrix, the thermal conductivity of the composite was substantially reduced by about 80%, which lead to the dimensionless figure of merit (ZT) value increment about 28% (from 0.32 to 0.41) at 1000K. TEM shows the nano inclusions formed within the CdO matrix and grain boundaries as well, which is thought to contribute to the reduction of thermal conductivity of the composite by additional scattering mechanism for the mid-to long-wavelength phonons. This facile and low-cost approach might be widely adopted and synergized to other TE materials systems to further improve their performance.
资助信息	National Natural Science foundation of China [51372064]; Nature Science Foundation of Hebei Province, China [A2013201249, A2014201176]; Open Foundation, the College of Physics Science and Technology, Hebei University [GXGC201402]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59369]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Li, LJ,Liang, S,Li, SM,et al. Enhanced thermoelectric performance in CdO by nano-SiO2 inclusions[J]. NANOTECHNOLOGY,2014,25(42).
APA	Li, LJ.,Liang, S.,Li, SM.,Wang, JL.,Wang, SF.,...&Fu, GS.(2014).Enhanced thermoelectric performance in CdO by nano-SiO2 inclusions.NANOTECHNOLOGY,25(42).
MLA	Li, LJ,et al."Enhanced thermoelectric performance in CdO by nano-SiO2 inclusions".NANOTECHNOLOGY 25.42(2014).